diff --git a/configs/amber/hello/Make.defs b/configs/amber/hello/Make.defs
index 779ece0d63..f14ef33ef8 100644
--- a/configs/amber/hello/Make.defs
+++ b/configs/amber/hello/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/amber/src/Makefile b/configs/amber/src/Makefile
index abd76a6589..21025055da 100644
--- a/configs/amber/src/Makefile
+++ b/configs/amber/src/Makefile
@@ -42,55 +42,4 @@ ifeq ($(CONFIG_ARCH_LEDS),y)
 CSRCS += atmega_leds.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_ARCH_FAMILY_AVR32),y)
-ARCH_SUBDIR = avr32
-endif
-ifeq ($(CONFIG_ARCH_FAMILY_AVR),y)
-ARCH_SUBDIR = avr
-endif
-
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}"
-else
-  CFLAGS += -I "$(TOPDIR)/sched"
-  CFLAGS += -I "$(ARCH_SRCDIR)/chip"
-  CFLAGS += -I "$(ARCH_SRCDIR)/common"
-  CFLAGS += -I "$(ARCH_SRCDIR)/$(ARCH_SUBDIR)"
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/arduino-due/nsh/Make.defs b/configs/arduino-due/nsh/Make.defs
index 0474b94a27..17b4b978b2 100644
--- a/configs/arduino-due/nsh/Make.defs
+++ b/configs/arduino-due/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/arduino-due/src/Makefile b/configs/arduino-due/src/Makefile
index 7f7844c8cb..e4f1e3054b 100644
--- a/configs/arduino-due/src/Makefile
+++ b/configs/arduino-due/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -73,45 +69,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += sam_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/avr32dev1/nsh/Make.defs b/configs/avr32dev1/nsh/Make.defs
index 2b9bd7a4ab..6e2b6cdc2a 100644
--- a/configs/avr32dev1/nsh/Make.defs
+++ b/configs/avr32dev1/nsh/Make.defs
@@ -90,6 +90,7 @@ CXXPICFLAGS = $(ARCHPICFLAGS) $(ARCHALLCXXFLAGS)
 CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS = $(ARCHALLCFLAGS) -D__ASSEMBLY__
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/avr32dev1/ostest/Make.defs b/configs/avr32dev1/ostest/Make.defs
index d595646293..81aa2b9210 100644
--- a/configs/avr32dev1/ostest/Make.defs
+++ b/configs/avr32dev1/ostest/Make.defs
@@ -104,6 +104,7 @@ CXXPICFLAGS = $(ARCHPICFLAGS) $(ARCHALLCXXFLAGS)
 CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS = $(ARCHALLCFLAGS) -D__ASSEMBLY__
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/avr32dev1/src/Makefile b/configs/avr32dev1/src/Makefile
index 9117c3a841..df8d3890e9 100644
--- a/configs/avr32dev1/src/Makefile
+++ b/configs/avr32dev1/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = avr32_boot.c
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -46,45 +44,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += avr32_buttons.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/avr32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/avr32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
-
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/c5471evm/httpd/Make.defs b/configs/c5471evm/httpd/Make.defs
index bdf36e6799..a459d9f8dc 100644
--- a/configs/c5471evm/httpd/Make.defs
+++ b/configs/c5471evm/httpd/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/c5471evm/nettest/Make.defs b/configs/c5471evm/nettest/Make.defs
index cebda6103f..d26455557f 100644
--- a/configs/c5471evm/nettest/Make.defs
+++ b/configs/c5471evm/nettest/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/c5471evm/nsh/Make.defs b/configs/c5471evm/nsh/Make.defs
index ec27b9ac7d..f4491b4b4f 100644
--- a/configs/c5471evm/nsh/Make.defs
+++ b/configs/c5471evm/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/c5471evm/src/Makefile b/configs/c5471evm/src/Makefile
index 60db23060b..e43f8cf04e 100644
--- a/configs/c5471evm/src/Makefile
+++ b/configs/c5471evm/src/Makefile
@@ -35,49 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = c5471_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I $(ARCH_SRCDIR)$(DELIM)chip -I $(ARCH_SRCDIR)$(DELIM)common -I $(ARCH_SRCDIR)$(DELIM)arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/cc3200-launchpad/nsh/Make.defs b/configs/cc3200-launchpad/nsh/Make.defs
index b7f4e01714..db80c6519e 100644
--- a/configs/cc3200-launchpad/nsh/Make.defs
+++ b/configs/cc3200-launchpad/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/cc3200-launchpad/src/Makefile b/configs/cc3200-launchpad/src/Makefile
index c9b9b3e486..6e07a432b9 100644
--- a/configs/cc3200-launchpad/src/Makefile
+++ b/configs/cc3200-launchpad/src/Makefile
@@ -36,53 +36,11 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched -I../include
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = cc3200_boot.c cc3200_serial.c cc3200_utils.c cc3200_leds.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
 CSRCS += cc3200_autoleds.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/cloudctrl/nsh/Make.defs b/configs/cloudctrl/nsh/Make.defs
index b284491705..e44deaf3c3 100644
--- a/configs/cloudctrl/nsh/Make.defs
+++ b/configs/cloudctrl/nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/cloudctrl/src/Makefile b/configs/cloudctrl/src/Makefile
index f2036f024d..70c1a4b934 100644
--- a/configs/cloudctrl/src/Makefile
+++ b/configs/cloudctrl/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c stm32_chipid.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -89,43 +85,4 @@ ifeq ($(CONFIG_STM32_PHYINIT),y)
 CSRCS += stm32_phyinit.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/compal_e86/nsh_highram/Make.defs b/configs/compal_e86/nsh_highram/Make.defs
index 5448d3627b..3b3c9999eb 100644
--- a/configs/compal_e86/nsh_highram/Make.defs
+++ b/configs/compal_e86/nsh_highram/Make.defs
@@ -121,6 +121,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/compal_e86/src/Makefile b/configs/compal_e86/src/Makefile
index f519bca3a9..b8f7e5dc8a 100644
--- a/configs/compal_e86/src/Makefile
+++ b/configs/compal_e86/src/Makefile
@@ -39,49 +39,6 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = boot.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\arm
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/compal_e88/nsh_highram/Make.defs b/configs/compal_e88/nsh_highram/Make.defs
index 569116f9d4..c7dbe379c5 100644
--- a/configs/compal_e88/nsh_highram/Make.defs
+++ b/configs/compal_e88/nsh_highram/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/compal_e88/src/Makefile b/configs/compal_e88/src/Makefile
index 86af06e3ab..e4703f9a0a 100644
--- a/configs/compal_e88/src/Makefile
+++ b/configs/compal_e88/src/Makefile
@@ -39,49 +39,6 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = boot.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\arm
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/compal_e99/nsh_compalram/Make.defs b/configs/compal_e99/nsh_compalram/Make.defs
index f99e19eaf4..6e0d252bf8 100644
--- a/configs/compal_e99/nsh_compalram/Make.defs
+++ b/configs/compal_e99/nsh_compalram/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/compal_e99/nsh_highram/Make.defs b/configs/compal_e99/nsh_highram/Make.defs
index cd31943938..109b08c5df 100644
--- a/configs/compal_e99/nsh_highram/Make.defs
+++ b/configs/compal_e99/nsh_highram/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/compal_e99/src/Makefile b/configs/compal_e99/src/Makefile
index abae99b94e..c2ad1cc776 100644
--- a/configs/compal_e99/src/Makefile
+++ b/configs/compal_e99/src/Makefile
@@ -39,49 +39,6 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = boot.c ssd1783.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\arm
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/demo9s12ne64/ostest/Make.defs b/configs/demo9s12ne64/ostest/Make.defs
index 7a6ffbeff1..6b9eec66a1 100644
--- a/configs/demo9s12ne64/ostest/Make.defs
+++ b/configs/demo9s12ne64/ostest/Make.defs
@@ -110,6 +110,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/demo9s12ne64/src/Makefile b/configs/demo9s12ne64/src/Makefile
index 3e37655224..aaf5218f75 100644
--- a/configs/demo9s12ne64/src/Makefile
+++ b/configs/demo9s12ne64/src/Makefile
@@ -35,51 +35,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = m9s12_boot.c m9s12_leds.c m9s12_buttons.c m9s12_spi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += m9s12_nsh.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/dk-tm4c129x/ipv6/Make.defs b/configs/dk-tm4c129x/ipv6/Make.defs
index 413c9da11a..3feec176c2 100644
--- a/configs/dk-tm4c129x/ipv6/Make.defs
+++ b/configs/dk-tm4c129x/ipv6/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/dk-tm4c129x/nsh/Make.defs b/configs/dk-tm4c129x/nsh/Make.defs
index 8b28ba9817..0ce553800e 100644
--- a/configs/dk-tm4c129x/nsh/Make.defs
+++ b/configs/dk-tm4c129x/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/dk-tm4c129x/src/Makefile b/configs/dk-tm4c129x/src/Makefile
index 5ce6c83d28..8f9643144c 100644
--- a/configs/dk-tm4c129x/src/Makefile
+++ b/configs/dk-tm4c129x/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = tm4c_boot.c tm4c_bringup.c tm4c_ssi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -69,43 +66,4 @@ CSRCS += tm4c_tmp100.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ea3131/nsh/Make.defs b/configs/ea3131/nsh/Make.defs
index 61d18fdc55..fc4b979bf0 100644
--- a/configs/ea3131/nsh/Make.defs
+++ b/configs/ea3131/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ea3131/pgnsh/Make.defs b/configs/ea3131/pgnsh/Make.defs
index 85f2898256..8b411e7c64 100644
--- a/configs/ea3131/pgnsh/Make.defs
+++ b/configs/ea3131/pgnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ea3131/src/Makefile b/configs/ea3131/src/Makefile
index 13160b908f..7279a56af1 100644
--- a/configs/ea3131/src/Makefile
+++ b/configs/ea3131/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = lpc31_boot.c lpc31_clkinit.c
 
 ifeq ($(CONFIG_ARCH_BUTTONS),y)
@@ -75,41 +71,4 @@ CSRCS += lpc31_usbmsc.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ea3131/usbserial/Make.defs b/configs/ea3131/usbserial/Make.defs
index 0d9ea55b8e..b96dfeff4a 100644
--- a/configs/ea3131/usbserial/Make.defs
+++ b/configs/ea3131/usbserial/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ea3152/ostest/Make.defs b/configs/ea3152/ostest/Make.defs
index cbfa24ec3c..5e1882159d 100644
--- a/configs/ea3152/ostest/Make.defs
+++ b/configs/ea3152/ostest/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ea3152/src/Makefile b/configs/ea3152/src/Makefile
index 01afcb5e72..f7a8bbdfc5 100644
--- a/configs/ea3152/src/Makefile
+++ b/configs/ea3152/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = lpc31_boot.c lpc31_clkinit.c
 ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += lpc31_buttons.c
@@ -62,43 +58,5 @@ endif
 ifeq ($(CONFIG_USBMSC),y)
 CSRCS += lpc31_usbmsc.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/eagle100/httpd/Make.defs b/configs/eagle100/httpd/Make.defs
index d067c45491..80d00e637e 100644
--- a/configs/eagle100/httpd/Make.defs
+++ b/configs/eagle100/httpd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/eagle100/nettest/Make.defs b/configs/eagle100/nettest/Make.defs
index 2565357b81..e018209bc8 100644
--- a/configs/eagle100/nettest/Make.defs
+++ b/configs/eagle100/nettest/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/eagle100/nsh/Make.defs b/configs/eagle100/nsh/Make.defs
index 6d91bdfd1f..d483a17c54 100644
--- a/configs/eagle100/nsh/Make.defs
+++ b/configs/eagle100/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/eagle100/nxflat/Make.defs b/configs/eagle100/nxflat/Make.defs
index f965484eb6..a0652f1afb 100644
--- a/configs/eagle100/nxflat/Make.defs
+++ b/configs/eagle100/nxflat/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/eagle100/src/Makefile b/configs/eagle100/src/Makefile
index af5ee76065..f7286c53e9 100644
--- a/configs/eagle100/src/Makefile
+++ b/configs/eagle100/src/Makefile
@@ -35,51 +35,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += lm_nsh.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/eagle100/thttpd/Make.defs b/configs/eagle100/thttpd/Make.defs
index 5235ac54ce..211bcba3e9 100644
--- a/configs/eagle100/thttpd/Make.defs
+++ b/configs/eagle100/thttpd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/efm32-g8xx-stk/nsh/Make.defs b/configs/efm32-g8xx-stk/nsh/Make.defs
index 5de73c1f27..3301de80ad 100644
--- a/configs/efm32-g8xx-stk/nsh/Make.defs
+++ b/configs/efm32-g8xx-stk/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/efm32-g8xx-stk/src/Makefile b/configs/efm32-g8xx-stk/src/Makefile
index d2503cc8bd..f0314ad335 100644
--- a/configs/efm32-g8xx-stk/src/Makefile
+++ b/configs/efm32-g8xx-stk/src/Makefile
@@ -35,6 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
+ASRCS =
 CSRCS = efm32_boot.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -43,41 +44,4 @@ else
 CSRCS += efm32_userleds.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/efm32gg-stk3700/nsh/Make.defs b/configs/efm32gg-stk3700/nsh/Make.defs
index 5de73c1f27..3301de80ad 100644
--- a/configs/efm32gg-stk3700/nsh/Make.defs
+++ b/configs/efm32gg-stk3700/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/efm32gg-stk3700/src/Makefile b/configs/efm32gg-stk3700/src/Makefile
index ae6b40c698..6854755b54 100644
--- a/configs/efm32gg-stk3700/src/Makefile
+++ b/configs/efm32gg-stk3700/src/Makefile
@@ -35,6 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
+ASRCS =
 CSRCS = efm32_boot.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -43,41 +44,4 @@ else
 CSRCS += efm32_userleds.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ekk-lm3s9b96/nsh/Make.defs b/configs/ekk-lm3s9b96/nsh/Make.defs
index ada10b7e05..a6757b846f 100644
--- a/configs/ekk-lm3s9b96/nsh/Make.defs
+++ b/configs/ekk-lm3s9b96/nsh/Make.defs
@@ -92,6 +92,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ekk-lm3s9b96/src/Makefile b/configs/ekk-lm3s9b96/src/Makefile
index c6af87d900..9f4a781c3a 100644
--- a/configs/ekk-lm3s9b96/src/Makefile
+++ b/configs/ekk-lm3s9b96/src/Makefile
@@ -36,52 +36,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += lm_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ez80f910200kitg/src/Makefile b/configs/ez80f910200kitg/src/Makefile
index d064356111..33b0864cfc 100644
--- a/configs/ez80f910200kitg/src/Makefile
+++ b/configs/ez80f910200kitg/src/Makefile
@@ -35,56 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = ez80_lowinit.c ez80_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) `cygpath -w $<` -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ez80f910200zco/src/Makefile b/configs/ez80f910200zco/src/Makefile
index 1688189429..cea5566087 100644
--- a/configs/ez80f910200zco/src/Makefile
+++ b/configs/ez80f910200zco/src/Makefile
@@ -35,23 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = ez80_lowinit.c
 ifeq ($(CONFIG_ARCH_LEDS),y)
 CSRCS += ez80_leds.c
@@ -59,39 +43,5 @@ endif
 ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += ez80_buttons.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) `cygpath -w $<` -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/fire-stm32v2/nsh/Make.defs b/configs/fire-stm32v2/nsh/Make.defs
index 484196b7c2..e4a6a9a7f0 100644
--- a/configs/fire-stm32v2/nsh/Make.defs
+++ b/configs/fire-stm32v2/nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/fire-stm32v2/src/Makefile b/configs/fire-stm32v2/src/Makefile
index d4b4aa548d..87dd63bee0 100644
--- a/configs/fire-stm32v2/src/Makefile
+++ b/configs/fire-stm32v2/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c stm32_usbdev.c stm32_mmcsd.c
 
 ifeq ($(CONFIG_STM32_FSMC),y)
@@ -84,43 +80,4 @@ ifeq ($(CONFIG_WATCHDOG),y)
 CSRCS += stm32_watchdog.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/freedom-kl25z/minnsh/Make.defs b/configs/freedom-kl25z/minnsh/Make.defs
index 04a0bf43a5..6672a5ecea 100644
--- a/configs/freedom-kl25z/minnsh/Make.defs
+++ b/configs/freedom-kl25z/minnsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/freedom-kl25z/nsh/Make.defs b/configs/freedom-kl25z/nsh/Make.defs
index 2779708ebe..1c3161e4e8 100644
--- a/configs/freedom-kl25z/nsh/Make.defs
+++ b/configs/freedom-kl25z/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/freedom-kl25z/src/Makefile b/configs/freedom-kl25z/src/Makefile
index db5a142f54..2105da1101 100644
--- a/configs/freedom-kl25z/src/Makefile
+++ b/configs/freedom-kl25z/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = kl_boardinitialize.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -90,47 +86,4 @@ ifeq ($(CONFIG_SENSORS_ADXL345),y)
 CSRCS += kl_adxl345.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/freedom-kl26z/minnsh/Make.defs b/configs/freedom-kl26z/minnsh/Make.defs
index affd69755e..099b656bbd 100644
--- a/configs/freedom-kl26z/minnsh/Make.defs
+++ b/configs/freedom-kl26z/minnsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/freedom-kl26z/nsh/Make.defs b/configs/freedom-kl26z/nsh/Make.defs
index 1e3058e88c..bb6cf92832 100644
--- a/configs/freedom-kl26z/nsh/Make.defs
+++ b/configs/freedom-kl26z/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/freedom-kl26z/src/Makefile b/configs/freedom-kl26z/src/Makefile
index ce426e61f2..863bf74571 100644
--- a/configs/freedom-kl26z/src/Makefile
+++ b/configs/freedom-kl26z/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = kl_boardinitialize.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -66,47 +62,4 @@ ifeq ($(CONFIG_PWM),y)
 CSRCS += kl_pwm.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/hymini-stm32v/buttons/Make.defs b/configs/hymini-stm32v/buttons/Make.defs
index 82c89cc04b..96aa71fc21 100644
--- a/configs/hymini-stm32v/buttons/Make.defs
+++ b/configs/hymini-stm32v/buttons/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/nsh/Make.defs b/configs/hymini-stm32v/nsh/Make.defs
index b5438ae959..7dede295b0 100644
--- a/configs/hymini-stm32v/nsh/Make.defs
+++ b/configs/hymini-stm32v/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/nsh2/Make.defs b/configs/hymini-stm32v/nsh2/Make.defs
index 6f942d9e03..03d2a4a905 100644
--- a/configs/hymini-stm32v/nsh2/Make.defs
+++ b/configs/hymini-stm32v/nsh2/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/src/Makefile b/configs/hymini-stm32v/src/Makefile
index 6f4216cf8a..587bff4dab 100644
--- a/configs/hymini-stm32v/src/Makefile
+++ b/configs/hymini-stm32v/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_buttons.c stm32_spi.c stm32_usbdev.c
 
 ifeq ($(CONFIG_LCD_SSD1289),y)
@@ -67,43 +63,4 @@ ifeq ($(CONFIG_WATCHDOG),y)
 CSRCS += stm32_watchdog.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/hymini-stm32v/usbmsc/Make.defs b/configs/hymini-stm32v/usbmsc/Make.defs
index 39511fc7c7..e22debe60e 100644
--- a/configs/hymini-stm32v/usbmsc/Make.defs
+++ b/configs/hymini-stm32v/usbmsc/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/usbnsh/Make.defs b/configs/hymini-stm32v/usbnsh/Make.defs
index 75531f5887..e6e6cb045e 100644
--- a/configs/hymini-stm32v/usbnsh/Make.defs
+++ b/configs/hymini-stm32v/usbnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/hymini-stm32v/usbserial/Make.defs b/configs/hymini-stm32v/usbserial/Make.defs
index 2ffbf193c0..c07c1961e9 100644
--- a/configs/hymini-stm32v/usbserial/Make.defs
+++ b/configs/hymini-stm32v/usbserial/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/kwikstik-k40/ostest/Make.defs b/configs/kwikstik-k40/ostest/Make.defs
index 68546dd9da..11dd404db6 100644
--- a/configs/kwikstik-k40/ostest/Make.defs
+++ b/configs/kwikstik-k40/ostest/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/kwikstik-k40/src/Makefile b/configs/kwikstik-k40/src/Makefile
index 9dc769bb0d..59a2fe6408 100644
--- a/configs/kwikstik-k40/src/Makefile
+++ b/configs/kwikstik-k40/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = k40_boot.c k40_lcd.c k40_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -62,42 +58,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += k40_usbmsc.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-      -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-      -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lincoln60/netnsh/Make.defs b/configs/lincoln60/netnsh/Make.defs
index 31944df579..1218ec37fe 100644
--- a/configs/lincoln60/netnsh/Make.defs
+++ b/configs/lincoln60/netnsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lincoln60/nsh/Make.defs b/configs/lincoln60/nsh/Make.defs
index 5c9da6d3a9..1b91421c29 100644
--- a/configs/lincoln60/nsh/Make.defs
+++ b/configs/lincoln60/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lincoln60/src/Makefile b/configs/lincoln60/src/Makefile
index a54083f1e5..9f9af80c0f 100644
--- a/configs/lincoln60/src/Makefile
+++ b/configs/lincoln60/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c
 
@@ -52,44 +50,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += lpc17_buttons.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lincoln60/thttpd-binfs/Make.defs b/configs/lincoln60/thttpd-binfs/Make.defs
index 3a61d891a2..0f6e0ec766 100644
--- a/configs/lincoln60/thttpd-binfs/Make.defs
+++ b/configs/lincoln60/thttpd-binfs/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6432-s2e/nsh/Make.defs b/configs/lm3s6432-s2e/nsh/Make.defs
index 08ba4f596d..944c269ae5 100644
--- a/configs/lm3s6432-s2e/nsh/Make.defs
+++ b/configs/lm3s6432-s2e/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6432-s2e/src/Makefile b/configs/lm3s6432-s2e/src/Makefile
index 683498fba0..792180ba68 100644
--- a/configs/lm3s6432-s2e/src/Makefile
+++ b/configs/lm3s6432-s2e/src/Makefile
@@ -35,52 +35,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += lm_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lm3s6965-ek/discover/Make.defs b/configs/lm3s6965-ek/discover/Make.defs
index c81cebf75f..f9439afefd 100644
--- a/configs/lm3s6965-ek/discover/Make.defs
+++ b/configs/lm3s6965-ek/discover/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6965-ek/nsh/Make.defs b/configs/lm3s6965-ek/nsh/Make.defs
index 502c967724..d82c8d5dc3 100644
--- a/configs/lm3s6965-ek/nsh/Make.defs
+++ b/configs/lm3s6965-ek/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6965-ek/nx/Make.defs b/configs/lm3s6965-ek/nx/Make.defs
index daf30037c6..afec54a133 100644
--- a/configs/lm3s6965-ek/nx/Make.defs
+++ b/configs/lm3s6965-ek/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s6965-ek/src/Makefile b/configs/lm3s6965-ek/src/Makefile
index 2f21a28a42..17fbd08f9a 100644
--- a/configs/lm3s6965-ek/src/Makefile
+++ b/configs/lm3s6965-ek/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -49,43 +46,4 @@ ifeq ($(CONFIG_NX_LCDDRIVER),y)
 CSRCS += lm_oled.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lm3s6965-ek/tcpecho/Make.defs b/configs/lm3s6965-ek/tcpecho/Make.defs
index 3b1c12a44d..a7ea87a1e2 100644
--- a/configs/lm3s6965-ek/tcpecho/Make.defs
+++ b/configs/lm3s6965-ek/tcpecho/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s8962-ek/nsh/Make.defs b/configs/lm3s8962-ek/nsh/Make.defs
index 610fd2ca8e..e6a44d123e 100644
--- a/configs/lm3s8962-ek/nsh/Make.defs
+++ b/configs/lm3s8962-ek/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s8962-ek/nx/Make.defs b/configs/lm3s8962-ek/nx/Make.defs
index c6e361f8dc..518493070a 100644
--- a/configs/lm3s8962-ek/nx/Make.defs
+++ b/configs/lm3s8962-ek/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm3s8962-ek/src/Makefile b/configs/lm3s8962-ek/src/Makefile
index 3ef8dc86d9..a49ed3f602 100644
--- a/configs/lm3s8962-ek/src/Makefile
+++ b/configs/lm3s8962-ek/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lm_boot.c lm_leds.c lm_ethernet.c lm_ssi.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -49,43 +46,4 @@ ifeq ($(CONFIG_NX_LCDDRIVER),y)
 CSRCS += lm_oled.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lm4f120-launchpad/nsh/Make.defs b/configs/lm4f120-launchpad/nsh/Make.defs
index 8b9a9b9262..9b1726d20c 100644
--- a/configs/lm4f120-launchpad/nsh/Make.defs
+++ b/configs/lm4f120-launchpad/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lm4f120-launchpad/src/Makefile b/configs/lm4f120-launchpad/src/Makefile
index be5bc10f99..523122e3ca 100644
--- a/configs/lm4f120-launchpad/src/Makefile
+++ b/configs/lm4f120-launchpad/src/Makefile
@@ -35,57 +35,15 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)/sched
-
-ASRCS		=
-AOBJS		= $(ASRCS:.S=$(OBJEXT))
-CSRCS		= lm4f_boot.c lm4f_ssi.c
+ASRCS =
+CSRCS = lm4f_boot.c lm4f_ssi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
-CSRCS		+= lm4f_autoleds.c
+CSRCS += lm4f_autoleds.c
 endif
 
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
-CSRCS		+= lm4f_nsh.c
+CSRCS += lm4f_nsh.c
 endif
 
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-  		   -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-  		   -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS	+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpc4330-xplorer/nsh/Make.defs b/configs/lpc4330-xplorer/nsh/Make.defs
index 03e76c6895..9236d219bd 100644
--- a/configs/lpc4330-xplorer/nsh/Make.defs
+++ b/configs/lpc4330-xplorer/nsh/Make.defs
@@ -111,6 +111,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpc4330-xplorer/src/Makefile b/configs/lpc4330-xplorer/src/Makefile
index ece3720647..9401227b7c 100644
--- a/configs/lpc4330-xplorer/src/Makefile
+++ b/configs/lpc4330-xplorer/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc43_boot.c
 
@@ -80,44 +78,4 @@ CSRCS += $(SPIFI_LIB)/spansion.c
 CSRCS += $(SPIFI_LIB)/winbond.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpc4357-evb/nsh/Make.defs b/configs/lpc4357-evb/nsh/Make.defs
index 791b924b8c..a72563c67e 100644
--- a/configs/lpc4357-evb/nsh/Make.defs
+++ b/configs/lpc4357-evb/nsh/Make.defs
@@ -111,6 +111,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpc4357-evb/src/Makefile b/configs/lpc4357-evb/src/Makefile
index 4003c06180..2e02f71ffb 100644
--- a/configs/lpc4357-evb/src/Makefile
+++ b/configs/lpc4357-evb/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc43_boot.c
 
@@ -70,44 +68,4 @@ CSRCS += $(SPIFI_LIB)/spansion.c
 CSRCS += $(SPIFI_LIB)/winbond.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpcxpresso-lpc1115/minnsh/Make.defs b/configs/lpcxpresso-lpc1115/minnsh/Make.defs
index 9115a02d3a..b8d442c3e8 100644
--- a/configs/lpcxpresso-lpc1115/minnsh/Make.defs
+++ b/configs/lpcxpresso-lpc1115/minnsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1115/nsh/Make.defs b/configs/lpcxpresso-lpc1115/nsh/Make.defs
index 808136fcab..fa87f7951e 100644
--- a/configs/lpcxpresso-lpc1115/nsh/Make.defs
+++ b/configs/lpcxpresso-lpc1115/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1115/src/Makefile b/configs/lpcxpresso-lpc1115/src/Makefile
index 33a8499aa2..4091b1db74 100644
--- a/configs/lpcxpresso-lpc1115/src/Makefile
+++ b/configs/lpcxpresso-lpc1115/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = lpc11_boot.c
 
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
@@ -62,47 +58,4 @@ ifeq ($(CONFIG_PWM),y)
 CSRCS += lpc11_pwm.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpcxpresso-lpc1768/dhcpd/Make.defs b/configs/lpcxpresso-lpc1768/dhcpd/Make.defs
index 9dae0cb46a..0b72559b4e 100644
--- a/configs/lpcxpresso-lpc1768/dhcpd/Make.defs
+++ b/configs/lpcxpresso-lpc1768/dhcpd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1768/nsh/Make.defs b/configs/lpcxpresso-lpc1768/nsh/Make.defs
index fd38611675..f48872f471 100644
--- a/configs/lpcxpresso-lpc1768/nsh/Make.defs
+++ b/configs/lpcxpresso-lpc1768/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1768/nx/Make.defs b/configs/lpcxpresso-lpc1768/nx/Make.defs
index 778e1a9dc3..6c15ebb03b 100644
--- a/configs/lpcxpresso-lpc1768/nx/Make.defs
+++ b/configs/lpcxpresso-lpc1768/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1768/src/Makefile b/configs/lpcxpresso-lpc1768/src/Makefile
index 10783d92b5..b06b116f1f 100644
--- a/configs/lpcxpresso-lpc1768/src/Makefile
+++ b/configs/lpcxpresso-lpc1768/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c lpc17_ssp.c lpc17_adc.c lpc17_dac.c lpc17_pwm.c
 
@@ -52,44 +50,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += lpc17_usbmsc.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/lpcxpresso-lpc1768/thttpd/Make.defs b/configs/lpcxpresso-lpc1768/thttpd/Make.defs
index d8edc436f9..45aeb2dbf9 100644
--- a/configs/lpcxpresso-lpc1768/thttpd/Make.defs
+++ b/configs/lpcxpresso-lpc1768/thttpd/Make.defs
@@ -96,6 +96,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/lpcxpresso-lpc1768/usbmsc/Make.defs b/configs/lpcxpresso-lpc1768/usbmsc/Make.defs
index 8ed5206c94..02a52dc912 100644
--- a/configs/lpcxpresso-lpc1768/usbmsc/Make.defs
+++ b/configs/lpcxpresso-lpc1768/usbmsc/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/maple/nsh/Make.defs b/configs/maple/nsh/Make.defs
index 1ec9da2055..3ef9a5ab42 100644
--- a/configs/maple/nsh/Make.defs
+++ b/configs/maple/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/maple/nx/Make.defs b/configs/maple/nx/Make.defs
index e1cf55ee2a..19348786b4 100644
--- a/configs/maple/nx/Make.defs
+++ b/configs/maple/nx/Make.defs
@@ -95,6 +95,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/maple/src/Makefile b/configs/maple/src/Makefile
index 18a3e3eb05..5c5269512d 100644
--- a/configs/maple/src/Makefile
+++ b/configs/maple/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_usbdev.c stm32_spi.c
 
 ifeq ($(CONFIG_NX_LCDDRIVER),y)
@@ -60,43 +56,4 @@ ifeq ($(CONFIG_WATCHDOG),y)
 CSRCS += stm32_watchdog.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/maple/usbnsh/Make.defs b/configs/maple/usbnsh/Make.defs
index ba71fde809..b9c0e2e75b 100644
--- a/configs/maple/usbnsh/Make.defs
+++ b/configs/maple/usbnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mbed/hidkbd/Make.defs b/configs/mbed/hidkbd/Make.defs
index a8e0698577..b2a0c53741 100644
--- a/configs/mbed/hidkbd/Make.defs
+++ b/configs/mbed/hidkbd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mbed/nsh/Make.defs b/configs/mbed/nsh/Make.defs
index d66a97ea53..c252ff3f66 100644
--- a/configs/mbed/nsh/Make.defs
+++ b/configs/mbed/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mbed/src/Makefile b/configs/mbed/src/Makefile
index f6350eca7e..23720ddfc8 100644
--- a/configs/mbed/src/Makefile
+++ b/configs/mbed/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c lpc17_adc.c lpc17_dac.c lpc17_pwm.c
 
@@ -51,44 +49,4 @@ ifeq ($(CONFIG_EXAMPLES_HIDKBD),y)
 CSRCS += lpc17_hidkbd.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mcu123-lpc214x/composite/Make.defs b/configs/mcu123-lpc214x/composite/Make.defs
index 970e5057a2..c53b9a8d68 100644
--- a/configs/mcu123-lpc214x/composite/Make.defs
+++ b/configs/mcu123-lpc214x/composite/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mcu123-lpc214x/nsh/Make.defs b/configs/mcu123-lpc214x/nsh/Make.defs
index 0fa633a05f..8abeb261bf 100644
--- a/configs/mcu123-lpc214x/nsh/Make.defs
+++ b/configs/mcu123-lpc214x/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mcu123-lpc214x/src/Makefile b/configs/mcu123-lpc214x/src/Makefile
index 6dfe6b638a..349988fe2b 100644
--- a/configs/mcu123-lpc214x/src/Makefile
+++ b/configs/mcu123-lpc214x/src/Makefile
@@ -35,18 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/sched}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm -I$(TOPDIR)/sched
-endif
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lpc2148_spi1.c lpc2148_leds.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -61,36 +50,4 @@ ifeq ($(CONFIG_USBDEV_COMPOSITE),y)
 CSRCS += lpc2148_composite.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-CFLAGS += -I $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mcu123-lpc214x/usbmsc/Make.defs b/configs/mcu123-lpc214x/usbmsc/Make.defs
index aa543a24bb..fe42b1e133 100644
--- a/configs/mcu123-lpc214x/usbmsc/Make.defs
+++ b/configs/mcu123-lpc214x/usbmsc/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mcu123-lpc214x/usbserial/Make.defs b/configs/mcu123-lpc214x/usbserial/Make.defs
index 877f73e5c5..c667513ca0 100644
--- a/configs/mcu123-lpc214x/usbserial/Make.defs
+++ b/configs/mcu123-lpc214x/usbserial/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/micropendous3/hello/Make.defs b/configs/micropendous3/hello/Make.defs
index f2b72a77ed..8cda43d830 100644
--- a/configs/micropendous3/hello/Make.defs
+++ b/configs/micropendous3/hello/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/micropendous3/src/Makefile b/configs/micropendous3/src/Makefile
index 4e3743ff98..e8027c9f1f 100644
--- a/configs/micropendous3/src/Makefile
+++ b/configs/micropendous3/src/Makefile
@@ -42,55 +42,4 @@ ifeq ($(CONFIG_ARCH_LEDS),y)
 CSRCS += at90usb_leds.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_ARCH_FAMILY_AVR32),y)
-ARCH_SUBDIR = avr32
-endif
-ifeq ($(CONFIG_ARCH_FAMILY_AVR),y)
-ARCH_SUBDIR = avr
-endif
-
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}"
-else
-  CFLAGS += -I "$(TOPDIR)/sched"
-  CFLAGS += -I "$(ARCH_SRCDIR)/chip"
-  CFLAGS += -I "$(ARCH_SRCDIR)/common"
-  CFLAGS += -I "$(ARCH_SRCDIR)/$(ARCH_SUBDIR)"
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mikroe-stm32f4/fulldemo/Make.defs b/configs/mikroe-stm32f4/fulldemo/Make.defs
index 3f4dd54efc..e6cc472821 100644
--- a/configs/mikroe-stm32f4/fulldemo/Make.defs
+++ b/configs/mikroe-stm32f4/fulldemo/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/kostest/Make.defs b/configs/mikroe-stm32f4/kostest/Make.defs
index 2e1cdc0024..116f4b5cb0 100644
--- a/configs/mikroe-stm32f4/kostest/Make.defs
+++ b/configs/mikroe-stm32f4/kostest/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/nsh/Make.defs b/configs/mikroe-stm32f4/nsh/Make.defs
index 03d11b3690..d71376f341 100644
--- a/configs/mikroe-stm32f4/nsh/Make.defs
+++ b/configs/mikroe-stm32f4/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/nx/Make.defs b/configs/mikroe-stm32f4/nx/Make.defs
index 3f4dd54efc..e6cc472821 100644
--- a/configs/mikroe-stm32f4/nx/Make.defs
+++ b/configs/mikroe-stm32f4/nx/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/nxlines/Make.defs b/configs/mikroe-stm32f4/nxlines/Make.defs
index 3f4dd54efc..e6cc472821 100644
--- a/configs/mikroe-stm32f4/nxlines/Make.defs
+++ b/configs/mikroe-stm32f4/nxlines/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/nxtext/Make.defs b/configs/mikroe-stm32f4/nxtext/Make.defs
index 3f4dd54efc..e6cc472821 100644
--- a/configs/mikroe-stm32f4/nxtext/Make.defs
+++ b/configs/mikroe-stm32f4/nxtext/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mikroe-stm32f4/src/Makefile b/configs/mikroe-stm32f4/src/Makefile
index e8addfd49e..2b6a6dac2d 100644
--- a/configs/mikroe-stm32f4/src/Makefile
+++ b/configs/mikroe-stm32f4/src/Makefile
@@ -39,11 +39,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -102,47 +98,4 @@ ifeq ($(CONFIG_VS1053),y)
 CSRCS += stm32_vs1053.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mikroe-stm32f4/usbnsh/Make.defs b/configs/mikroe-stm32f4/usbnsh/Make.defs
index 3f4dd54efc..e6cc472821 100644
--- a/configs/mikroe-stm32f4/usbnsh/Make.defs
+++ b/configs/mikroe-stm32f4/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mirtoo/nsh/Make.defs b/configs/mirtoo/nsh/Make.defs
index bfa05caed8..064c83a97f 100644
--- a/configs/mirtoo/nsh/Make.defs
+++ b/configs/mirtoo/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mirtoo/nxffs/Make.defs b/configs/mirtoo/nxffs/Make.defs
index 3181965e02..94e8a7d4c1 100644
--- a/configs/mirtoo/nxffs/Make.defs
+++ b/configs/mirtoo/nxffs/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/mirtoo/src/Makefile b/configs/mirtoo/src/Makefile
index bdd72ec53f..8de2170183 100644
--- a/configs/mirtoo/src/Makefile
+++ b/configs/mirtoo/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32_boot.c pic32_leds.c
 
@@ -52,44 +50,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += pic32_nsh.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/moteino-mega/hello/Make.defs b/configs/moteino-mega/hello/Make.defs
index 8e84148216..f4454c64d9 100644
--- a/configs/moteino-mega/hello/Make.defs
+++ b/configs/moteino-mega/hello/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/moteino-mega/nsh/Make.defs b/configs/moteino-mega/nsh/Make.defs
index 6376d9c786..05017108f2 100644
--- a/configs/moteino-mega/nsh/Make.defs
+++ b/configs/moteino-mega/nsh/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/moteino-mega/src/Makefile b/configs/moteino-mega/src/Makefile
index 6d95aff436..703e8b9c47 100644
--- a/configs/moteino-mega/src/Makefile
+++ b/configs/moteino-mega/src/Makefile
@@ -35,62 +35,11 @@
 
 -include $(TOPDIR)/Make.defs
 
-ASRCS		=
-CSRCS		= avr_boot.c
+ASRCS =
+CSRCS = avr_boot.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
-CSRCS		+= avr_leds.c
+CSRCS += avr_leds.c
 endif
 
-AOBJS		= $(ASRCS:.S=$(OBJEXT))
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_ARCH_FAMILY_AVR32),y)
-ARCH_SUBDIR	= avr32
-endif
-ifeq ($(CONFIG_ARCH_FAMILY_AVR),y)
-ARCH_SUBDIR	= avr
-endif
-
-ifeq ($(WINTOOL),y)
-  CFLAGS	+= -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}"
-else
-  CFLAGS	+= -I "$(TOPDIR)/sched"
-  CFLAGS	+= -I "$(ARCH_SRCDIR)/chip"
-  CFLAGS	+= -I "$(ARCH_SRCDIR)/common"
-  CFLAGS	+= -I "$(ARCH_SRCDIR)/$(ARCH_SUBDIR)"
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/moxa/nsh/Make.defs b/configs/moxa/nsh/Make.defs
index f95a38b6af..54e28cc725 100644
--- a/configs/moxa/nsh/Make.defs
+++ b/configs/moxa/nsh/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/moxa/src/Makefile b/configs/moxa/src/Makefile
index 598ae01058..60543b6e53 100644
--- a/configs/moxa/src/Makefile
+++ b/configs/moxa/src/Makefile
@@ -35,56 +35,11 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = moxart_boot.c
 
 ifeq ($(CONFIG_NSH_LIBRARY),y)
 CSRCS += moxart_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/mx1ads/ostest/Make.defs b/configs/mx1ads/ostest/Make.defs
index 3bc23e60ed..048994dccc 100644
--- a/configs/mx1ads/ostest/Make.defs
+++ b/configs/mx1ads/ostest/Make.defs
@@ -90,6 +90,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/mx1ads/src/Makefile b/configs/mx1ads/src/Makefile
index db0ffb0f10..49c34fa747 100644
--- a/configs/mx1ads/src/Makefile
+++ b/configs/mx1ads/src/Makefile
@@ -35,42 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = mx1_boot.c mx1_leds.c mx1_network.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ne64badge/ostest/Make.defs b/configs/ne64badge/ostest/Make.defs
index b03f2fe3f6..824e0b07f6 100644
--- a/configs/ne64badge/ostest/Make.defs
+++ b/configs/ne64badge/ostest/Make.defs
@@ -110,6 +110,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ne64badge/src/Makefile b/configs/ne64badge/src/Makefile
index 74c95f3c80..28db5cf58b 100644
--- a/configs/ne64badge/src/Makefile
+++ b/configs/ne64badge/src/Makefile
@@ -35,51 +35,10 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = m9s12_boot.c m9s12_leds.c m9s12_buttons.c m9s12_spi.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += m9s12_nsh.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ntosd-dm320/nettest/Make.defs b/configs/ntosd-dm320/nettest/Make.defs
index c967ff935f..e6007dac65 100644
--- a/configs/ntosd-dm320/nettest/Make.defs
+++ b/configs/ntosd-dm320/nettest/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/nsh/Make.defs b/configs/ntosd-dm320/nsh/Make.defs
index 8ea4fe3552..90e0430b3b 100644
--- a/configs/ntosd-dm320/nsh/Make.defs
+++ b/configs/ntosd-dm320/nsh/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/poll/Make.defs b/configs/ntosd-dm320/poll/Make.defs
index 1fce2bbcad..c37f881063 100644
--- a/configs/ntosd-dm320/poll/Make.defs
+++ b/configs/ntosd-dm320/poll/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/src/Makefile b/configs/ntosd-dm320/src/Makefile
index 5a99d7d25e..9c09281a2c 100644
--- a/configs/ntosd-dm320/src/Makefile
+++ b/configs/ntosd-dm320/src/Makefile
@@ -35,50 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = dm320_leds.c dm320_network.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ntosd-dm320/thttpd/Make.defs b/configs/ntosd-dm320/thttpd/Make.defs
index c89fae7094..2f1bd4187c 100644
--- a/configs/ntosd-dm320/thttpd/Make.defs
+++ b/configs/ntosd-dm320/thttpd/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/udp/Make.defs b/configs/ntosd-dm320/udp/Make.defs
index 847b040b27..7b42cf5435 100644
--- a/configs/ntosd-dm320/udp/Make.defs
+++ b/configs/ntosd-dm320/udp/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/ntosd-dm320/webserver/Make.defs b/configs/ntosd-dm320/webserver/Make.defs
index 085430b729..62e276d30d 100644
--- a/configs/ntosd-dm320/webserver/Make.defs
+++ b/configs/ntosd-dm320/webserver/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS2		= $(NXFLATLDFLAGS1) \
 			  -no-check-sections
 LDNXFLATFLAGS		= -e main -s 2048
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/nucleo-f4x1re/f401-nsh/Make.defs b/configs/nucleo-f4x1re/f401-nsh/Make.defs
index 21bdd584a7..e91049133d 100644
--- a/configs/nucleo-f4x1re/f401-nsh/Make.defs
+++ b/configs/nucleo-f4x1re/f401-nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nucleo-f4x1re/f411-nsh/Make.defs b/configs/nucleo-f4x1re/f411-nsh/Make.defs
index 3b8e935412..c0586110f0 100755
--- a/configs/nucleo-f4x1re/f411-nsh/Make.defs
+++ b/configs/nucleo-f4x1re/f411-nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nucleo-f4x1re/src/Makefile b/configs/nucleo-f4x1re/src/Makefile
index e2ff50b6dd..27bcc28e39 100644
--- a/configs/nucleo-f4x1re/src/Makefile
+++ b/configs/nucleo-f4x1re/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
-ASRCS = 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
+ASRCS =
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -74,43 +70,4 @@ ifeq ($(CONFIG_NSH_LIBRARY),y)
 CSRCS += stm32_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/nucleus2g/nsh/Make.defs b/configs/nucleus2g/nsh/Make.defs
index 33bfbf648f..cfb3146e69 100644
--- a/configs/nucleus2g/nsh/Make.defs
+++ b/configs/nucleus2g/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nucleus2g/src/Makefile b/configs/nucleus2g/src/Makefile
index 523deed3c3..868e68d3f2 100644
--- a/configs/nucleus2g/src/Makefile
+++ b/configs/nucleus2g/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c lpc17_ssp.c lpc17_outputs.c
 
@@ -48,44 +46,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += lpc17_usbmsc.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/nucleus2g/usbmsc/Make.defs b/configs/nucleus2g/usbmsc/Make.defs
index 53e1fd39c6..4db7649a7b 100644
--- a/configs/nucleus2g/usbmsc/Make.defs
+++ b/configs/nucleus2g/usbmsc/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nucleus2g/usbserial/Make.defs b/configs/nucleus2g/usbserial/Make.defs
index 0a3c7275cf..f7a4435fbe 100644
--- a/configs/nucleus2g/usbserial/Make.defs
+++ b/configs/nucleus2g/usbserial/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nutiny-nuc120/nsh/Make.defs b/configs/nutiny-nuc120/nsh/Make.defs
index 066f0c3fd0..149b98be01 100644
--- a/configs/nutiny-nuc120/nsh/Make.defs
+++ b/configs/nutiny-nuc120/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/nutiny-nuc120/src/Makefile b/configs/nutiny-nuc120/src/Makefile
index 92fbae7030..423a07b046 100644
--- a/configs/nutiny-nuc120/src/Makefile
+++ b/configs/nutiny-nuc120/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = nuc_boardinitialize.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -70,47 +66,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += nuc_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-efm32g880f128-stk/nsh/Make.defs b/configs/olimex-efm32g880f128-stk/nsh/Make.defs
index 8a8f6ca52b..a089cda7fa 100644
--- a/configs/olimex-efm32g880f128-stk/nsh/Make.defs
+++ b/configs/olimex-efm32g880f128-stk/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-efm32g880f128-stk/src/Makefile b/configs/olimex-efm32g880f128-stk/src/Makefile
index 6428fdddff..413781b411 100644
--- a/configs/olimex-efm32g880f128-stk/src/Makefile
+++ b/configs/olimex-efm32g880f128-stk/src/Makefile
@@ -35,47 +35,11 @@
 
 -include $(TOPDIR)/Make.defs
 
+ASRCS =
 CSRCS = efm32_boot.c
 
 ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += efm32_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-lpc-h3131/nsh/Make.defs b/configs/olimex-lpc-h3131/nsh/Make.defs
index cdb3196865..fc8e9c1cc0 100644
--- a/configs/olimex-lpc-h3131/nsh/Make.defs
+++ b/configs/olimex-lpc-h3131/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc-h3131/src/Makefile b/configs/olimex-lpc-h3131/src/Makefile
index 6300078038..12ec7fa71b 100644
--- a/configs/olimex-lpc-h3131/src/Makefile
+++ b/configs/olimex-lpc-h3131/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = lpc31_boot.c lpc31_clkinit.c
 
 ifeq ($(CONFIG_LPC31_EXTDRAM),y)
@@ -71,41 +67,4 @@ endif
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-lpc1766stk/ftpc/Make.defs b/configs/olimex-lpc1766stk/ftpc/Make.defs
index 1bcbf365c6..75a9ffed5e 100644
--- a/configs/olimex-lpc1766stk/ftpc/Make.defs
+++ b/configs/olimex-lpc1766stk/ftpc/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/hidkbd/Make.defs b/configs/olimex-lpc1766stk/hidkbd/Make.defs
index 438d323a5d..6ceacd9b28 100644
--- a/configs/olimex-lpc1766stk/hidkbd/Make.defs
+++ b/configs/olimex-lpc1766stk/hidkbd/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/hidmouse/Make.defs b/configs/olimex-lpc1766stk/hidmouse/Make.defs
index 7337b498e6..f2b03c95d7 100644
--- a/configs/olimex-lpc1766stk/hidmouse/Make.defs
+++ b/configs/olimex-lpc1766stk/hidmouse/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/nettest/Make.defs b/configs/olimex-lpc1766stk/nettest/Make.defs
index 2b09e4cbc9..4483476376 100644
--- a/configs/olimex-lpc1766stk/nettest/Make.defs
+++ b/configs/olimex-lpc1766stk/nettest/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/nsh/Make.defs b/configs/olimex-lpc1766stk/nsh/Make.defs
index 1bfe9931c6..dbb8a31e4c 100644
--- a/configs/olimex-lpc1766stk/nsh/Make.defs
+++ b/configs/olimex-lpc1766stk/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/nx/Make.defs b/configs/olimex-lpc1766stk/nx/Make.defs
index 3db1d362f4..5b4c021a67 100644
--- a/configs/olimex-lpc1766stk/nx/Make.defs
+++ b/configs/olimex-lpc1766stk/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/slip-httpd/Make.defs b/configs/olimex-lpc1766stk/slip-httpd/Make.defs
index 42ff8c2c63..04967db88f 100644
--- a/configs/olimex-lpc1766stk/slip-httpd/Make.defs
+++ b/configs/olimex-lpc1766stk/slip-httpd/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/src/Makefile b/configs/olimex-lpc1766stk/src/Makefile
index eb6f7b1405..0fe8d8a40b 100644
--- a/configs/olimex-lpc1766stk/src/Makefile
+++ b/configs/olimex-lpc1766stk/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boot.c lpc17_leds.c lpc17_ssp.c
 
@@ -68,44 +66,4 @@ ifeq ($(CONFIG_USBHOST_HIDMOUSE),y)
 CSRCS += lpc17_hidmouse.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-lpc1766stk/thttpd-binfs/Make.defs b/configs/olimex-lpc1766stk/thttpd-binfs/Make.defs
index f8487afe95..01abf882db 100644
--- a/configs/olimex-lpc1766stk/thttpd-binfs/Make.defs
+++ b/configs/olimex-lpc1766stk/thttpd-binfs/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/thttpd-nxflat/Make.defs b/configs/olimex-lpc1766stk/thttpd-nxflat/Make.defs
index 5feb1a650d..a4ba6f8c2b 100644
--- a/configs/olimex-lpc1766stk/thttpd-nxflat/Make.defs
+++ b/configs/olimex-lpc1766stk/thttpd-nxflat/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/usbmsc/Make.defs b/configs/olimex-lpc1766stk/usbmsc/Make.defs
index 11643932bd..12ce4594ec 100644
--- a/configs/olimex-lpc1766stk/usbmsc/Make.defs
+++ b/configs/olimex-lpc1766stk/usbmsc/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/usbserial/Make.defs b/configs/olimex-lpc1766stk/usbserial/Make.defs
index 1bfc62f7ba..f50e4993e3 100644
--- a/configs/olimex-lpc1766stk/usbserial/Make.defs
+++ b/configs/olimex-lpc1766stk/usbserial/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc1766stk/zmodem/Make.defs b/configs/olimex-lpc1766stk/zmodem/Make.defs
index 62dda435dc..783511e203 100644
--- a/configs/olimex-lpc1766stk/zmodem/Make.defs
+++ b/configs/olimex-lpc1766stk/zmodem/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc2378/nsh/Make.defs b/configs/olimex-lpc2378/nsh/Make.defs
index f9fa9618a0..416160dde7 100644
--- a/configs/olimex-lpc2378/nsh/Make.defs
+++ b/configs/olimex-lpc2378/nsh/Make.defs
@@ -112,6 +112,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-lpc2378/src/Makefile b/configs/olimex-lpc2378/src/Makefile
index a10e2b07dc..9ed1c7b44b 100644
--- a/configs/olimex-lpc2378/src/Makefile
+++ b/configs/olimex-lpc2378/src/Makefile
@@ -40,54 +40,11 @@
 
 -include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/sched}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm -I$(TOPDIR)/sched
-endif
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = lpc2378_leds.c
 
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += lpc2378_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-CFLAGS += -I $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-stm32-h405/nshusb/Make.defs b/configs/olimex-stm32-h405/nshusb/Make.defs
index 6363d54846..93e2805ca3 100644
--- a/configs/olimex-stm32-h405/nshusb/Make.defs
+++ b/configs/olimex-stm32-h405/nshusb/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-stm32-h405/src/Makefile b/configs/olimex-stm32-h405/src/Makefile
index 28f47119a1..fd1cb5dd26 100644
--- a/configs/olimex-stm32-h405/src/Makefile
+++ b/configs/olimex-stm32-h405/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_cxxinitialize.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -68,43 +64,4 @@ ifeq ($(CONFIG_CAN),y)
 CSRCS += stm32_can.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-stm32-p107/nsh/Make.defs b/configs/olimex-stm32-p107/nsh/Make.defs
index dcf1dc5b07..b373158edb 100644
--- a/configs/olimex-stm32-p107/nsh/Make.defs
+++ b/configs/olimex-stm32-p107/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-stm32-p107/src/Makefile b/configs/olimex-stm32-p107/src/Makefile
index ab24d86605..9d4acd1697 100644
--- a/configs/olimex-stm32-p107/src/Makefile
+++ b/configs/olimex-stm32-p107/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_CAN),y)
@@ -50,43 +46,4 @@ ifeq ($(CONFIG_ENCX24J600),y)
 CSRCS += stm32_encx24j600.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-stm32-p207/nsh/Make.defs b/configs/olimex-stm32-p207/nsh/Make.defs
index 627832fba5..f6423328b8 100644
--- a/configs/olimex-stm32-p207/nsh/Make.defs
+++ b/configs/olimex-stm32-p207/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-stm32-p207/src/Makefile b/configs/olimex-stm32-p207/src/Makefile
index fb40a97df7..5d5629eade 100644
--- a/configs/olimex-stm32-p207/src/Makefile
+++ b/configs/olimex-stm32-p207/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_cxxinitialize.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -68,43 +64,4 @@ ifeq ($(CONFIG_CAN),y)
 CSRCS += stm32_can.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimex-strp711/nettest/Make.defs b/configs/olimex-strp711/nettest/Make.defs
index b62f147179..cd4e7d2476 100644
--- a/configs/olimex-strp711/nettest/Make.defs
+++ b/configs/olimex-strp711/nettest/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-strp711/nsh/Make.defs b/configs/olimex-strp711/nsh/Make.defs
index 68fc8e48ff..dd312dbc33 100644
--- a/configs/olimex-strp711/nsh/Make.defs
+++ b/configs/olimex-strp711/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimex-strp711/src/Makefile b/configs/olimex-strp711/src/Makefile
index 74f13a0a4b..8c7285a21e 100644
--- a/configs/olimex-strp711/src/Makefile
+++ b/configs/olimex-strp711/src/Makefile
@@ -35,18 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/sched}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm -I$(TOPDIR)/sched
-endif
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = str71_spi.c str71_leds.c str71_buttons.c
 ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += str71_nsh.c
@@ -54,36 +43,5 @@ endif
 ifeq ($(CONFIG_ENC28J60),y)
 CSRCS += str71_enc28j60.c
 endif
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-CFLAGS += -I $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimexino-stm32/can/Make.defs b/configs/olimexino-stm32/can/Make.defs
index 5fc1886c8a..0af3580777 100644
--- a/configs/olimexino-stm32/can/Make.defs
+++ b/configs/olimexino-stm32/can/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimexino-stm32/composite/Make.defs b/configs/olimexino-stm32/composite/Make.defs
index f88def2429..74174e4db6 100644
--- a/configs/olimexino-stm32/composite/Make.defs
+++ b/configs/olimexino-stm32/composite/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimexino-stm32/nsh/Make.defs b/configs/olimexino-stm32/nsh/Make.defs
index fe41f6b4da..b43cc376a8 100644
--- a/configs/olimexino-stm32/nsh/Make.defs
+++ b/configs/olimexino-stm32/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimexino-stm32/smallnsh/Make.defs b/configs/olimexino-stm32/smallnsh/Make.defs
index 455f2ff7ae..943285a712 100644
--- a/configs/olimexino-stm32/smallnsh/Make.defs
+++ b/configs/olimexino-stm32/smallnsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/olimexino-stm32/src/Makefile b/configs/olimexino-stm32/src/Makefile
index caa7364947..a36bca75e4 100644
--- a/configs/olimexino-stm32/src/Makefile
+++ b/configs/olimexino-stm32/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c stm32_leds.c
 
 ifeq ($(CONFIG_CAN),y)
@@ -70,43 +66,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += stm32_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/olimexino-stm32/tiny/Make.defs b/configs/olimexino-stm32/tiny/Make.defs
index 36850ec715..fa53ac64da 100644
--- a/configs/olimexino-stm32/tiny/Make.defs
+++ b/configs/olimexino-stm32/tiny/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/open1788/knsh/Make.defs b/configs/open1788/knsh/Make.defs
index c6ad8434f2..0274b16c74 100644
--- a/configs/open1788/knsh/Make.defs
+++ b/configs/open1788/knsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/open1788/nsh/Make.defs b/configs/open1788/nsh/Make.defs
index 617d4458a2..1139dd85a8 100644
--- a/configs/open1788/nsh/Make.defs
+++ b/configs/open1788/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/open1788/nxlines/Make.defs b/configs/open1788/nxlines/Make.defs
index 5ab07f07ab..be8f8c7fff 100644
--- a/configs/open1788/nxlines/Make.defs
+++ b/configs/open1788/nxlines/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/open1788/src/Makefile b/configs/open1788/src/Makefile
index 669d61a08b..8172a2027f 100644
--- a/configs/open1788/src/Makefile
+++ b/configs/open1788/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = lpc17_boardinitialize.c lpc17_ssp.c
 
@@ -76,46 +74,4 @@ ifeq ($(CONFIG_INPUT_ADS7843E),y)
   CSRCS += lpc17_touchscreen.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/p112/src/Makefile b/configs/p112/src/Makefile
index 377910e23d..57e263690b 100644
--- a/configs/p112/src/Makefile
+++ b/configs/p112/src/Makefile
@@ -35,43 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)$(DELIM)sched
-CFLAGS		+= -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)common
-CFLAGS		+= -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)z180
+ASRCS =
+CSRCS =
 
-ASRCS		=
-AOBJS		= $(ASRCS:$(ASMEXT)=$(OBJEXT))
-CSRCS		=
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-CFLAGS		+= -I $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pcblogic-pic32mx/nsh/Make.defs b/configs/pcblogic-pic32mx/nsh/Make.defs
index e0209a3990..ec72928785 100644
--- a/configs/pcblogic-pic32mx/nsh/Make.defs
+++ b/configs/pcblogic-pic32mx/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pcblogic-pic32mx/src/Makefile b/configs/pcblogic-pic32mx/src/Makefile
index bef17a3bf0..bc7ab00f5b 100644
--- a/configs/pcblogic-pic32mx/src/Makefile
+++ b/configs/pcblogic-pic32mx/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32mx_boot.c
 
@@ -48,44 +46,4 @@ ifeq ($(CONFIG_LCD_LCD1602),y)
 CSRCS += pic32mx_lcd1602.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pcduino-a10/nsh/Make.defs b/configs/pcduino-a10/nsh/Make.defs
index 027e57d354..5c5a9aa9d0 100644
--- a/configs/pcduino-a10/nsh/Make.defs
+++ b/configs/pcduino-a10/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pcduino-a10/src/Makefile b/configs/pcduino-a10/src/Makefile
index c7775da421..5112b67ebf 100644
--- a/configs/pcduino-a10/src/Makefile
+++ b/configs/pcduino-a10/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = a1x_boot.c a1x_leds.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -54,45 +50,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += a1x_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-a}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-a
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pic32mx-starterkit/nsh/Make.defs b/configs/pic32mx-starterkit/nsh/Make.defs
index 92dd1a4d52..2877aeabde 100644
--- a/configs/pic32mx-starterkit/nsh/Make.defs
+++ b/configs/pic32mx-starterkit/nsh/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pic32mx-starterkit/nsh2/Make.defs b/configs/pic32mx-starterkit/nsh2/Make.defs
index 5b6f1de421..d9a702d6b3 100644
--- a/configs/pic32mx-starterkit/nsh2/Make.defs
+++ b/configs/pic32mx-starterkit/nsh2/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pic32mx-starterkit/src/Makefile b/configs/pic32mx-starterkit/src/Makefile
index 7a5878e129..d7ebe18d4b 100644
--- a/configs/pic32mx-starterkit/src/Makefile
+++ b/configs/pic32mx-starterkit/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32mx_boot.c pic32mx_leds.c pic32mx_spi.c
 
@@ -55,44 +53,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += pic32mx_usbmsc.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pic32mx7mmb/nsh/Make.defs b/configs/pic32mx7mmb/nsh/Make.defs
index 1ae4c394fb..747323a5db 100644
--- a/configs/pic32mx7mmb/nsh/Make.defs
+++ b/configs/pic32mx7mmb/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pic32mx7mmb/src/Makefile b/configs/pic32mx7mmb/src/Makefile
index 73408883fb..9b855fe380 100644
--- a/configs/pic32mx7mmb/src/Makefile
+++ b/configs/pic32mx7mmb/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32_boot.c pic32_leds.c pic32_spi.c pic32_mio283qt2.c
 
@@ -59,44 +57,4 @@ ifeq ($(CONFIG_INPUT),y)
 CSRCS += pic32_touchscreen.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pic32mz-starterkit/nsh/Make.defs b/configs/pic32mz-starterkit/nsh/Make.defs
index 926b802de0..3a9671d3bf 100644
--- a/configs/pic32mz-starterkit/nsh/Make.defs
+++ b/configs/pic32mz-starterkit/nsh/Make.defs
@@ -125,6 +125,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pic32mz-starterkit/src/Makefile b/configs/pic32mz-starterkit/src/Makefile
index b2d52d99f1..128c862fb9 100644
--- a/configs/pic32mz-starterkit/src/Makefile
+++ b/configs/pic32mz-starterkit/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32mz_boot.c pic32mz_bringup.c pic32mz_spi.c
 
@@ -54,44 +52,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += pic32mz_nsh.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/pirelli_dpl10/nsh_highram/Make.defs b/configs/pirelli_dpl10/nsh_highram/Make.defs
index 9e99f130a9..c337458c35 100644
--- a/configs/pirelli_dpl10/nsh_highram/Make.defs
+++ b/configs/pirelli_dpl10/nsh_highram/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/pirelli_dpl10/src/Makefile b/configs/pirelli_dpl10/src/Makefile
index 50947694aa..4026b5fb1c 100644
--- a/configs/pirelli_dpl10/src/Makefile
+++ b/configs/pirelli_dpl10/src/Makefile
@@ -38,42 +38,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)/sched
+ASRCS =
+CSRCS = boot.c
 
-ASRCS		=
-AOBJS		= $(ASRCS:.S=$(OBJEXT))
-CSRCS		= boot.c
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-CFLAGS		+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/qemu-i486/nsh/Make.defs b/configs/qemu-i486/nsh/Make.defs
index 95c94ee398..51cf548ee9 100644
--- a/configs/qemu-i486/nsh/Make.defs
+++ b/configs/qemu-i486/nsh/Make.defs
@@ -96,6 +96,7 @@ CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(A
 CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS = $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT = .elf
diff --git a/configs/qemu-i486/ostest/Make.defs b/configs/qemu-i486/ostest/Make.defs
index eed91af57f..8be21c4180 100644
--- a/configs/qemu-i486/ostest/Make.defs
+++ b/configs/qemu-i486/ostest/Make.defs
@@ -96,6 +96,7 @@ CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(A
 CPPFLAGS = $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS = $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT = .elf
diff --git a/configs/qemu-i486/src/Makefile b/configs/qemu-i486/src/Makefile
index 16ed36505a..8de2ab6596 100644
--- a/configs/qemu-i486/src/Makefile
+++ b/configs/qemu-i486/src/Makefile
@@ -35,48 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)/sched
+ASRCS =
+CSRCS = qemu_boot.c
 
-ASRCS		=
-CSRCS		= qemu_boot.c
-
-AOBJS		= $(ASRCS:.S=$(OBJEXT))
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS	+= -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-  		   -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-else
-  CFLAGS	+= -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/rgmp/arm/default/Make.defs b/configs/rgmp/arm/default/Make.defs
index 7146a822c6..5899a5aa2c 100644
--- a/configs/rgmp/arm/default/Make.defs
+++ b/configs/rgmp/arm/default/Make.defs
@@ -73,6 +73,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/arm/nsh/Make.defs b/configs/rgmp/arm/nsh/Make.defs
index 705acc4284..d81c99ac6c 100644
--- a/configs/rgmp/arm/nsh/Make.defs
+++ b/configs/rgmp/arm/nsh/Make.defs
@@ -73,6 +73,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/x86/cxxtest/Make.defs b/configs/rgmp/x86/cxxtest/Make.defs
index eae3b9dcb6..6d1d654193 100644
--- a/configs/rgmp/x86/cxxtest/Make.defs
+++ b/configs/rgmp/x86/cxxtest/Make.defs
@@ -84,6 +84,7 @@ CXXFLAGS    = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLA
 CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
 AFLAGS		= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/x86/default/Make.defs b/configs/rgmp/x86/default/Make.defs
index 49fbb45444..8534231a88 100644
--- a/configs/rgmp/x86/default/Make.defs
+++ b/configs/rgmp/x86/default/Make.defs
@@ -72,6 +72,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/x86/helloxx/Make.defs b/configs/rgmp/x86/helloxx/Make.defs
index a2f4e5c06d..efd69c5df4 100644
--- a/configs/rgmp/x86/helloxx/Make.defs
+++ b/configs/rgmp/x86/helloxx/Make.defs
@@ -82,6 +82,7 @@ CXXFLAGS    = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLA
 CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
 AFLAGS		= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/rgmp/x86/nsh/Make.defs b/configs/rgmp/x86/nsh/Make.defs
index d8b373b0a0..5cda75278e 100644
--- a/configs/rgmp/x86/nsh/Make.defs
+++ b/configs/rgmp/x86/nsh/Make.defs
@@ -72,6 +72,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sam3u-ek/knsh/Make.defs b/configs/sam3u-ek/knsh/Make.defs
index 77b2d81601..239b3962ed 100644
--- a/configs/sam3u-ek/knsh/Make.defs
+++ b/configs/sam3u-ek/knsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam3u-ek/nsh/Make.defs b/configs/sam3u-ek/nsh/Make.defs
index c6f065bd8a..6c2080d908 100644
--- a/configs/sam3u-ek/nsh/Make.defs
+++ b/configs/sam3u-ek/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam3u-ek/nx/Make.defs b/configs/sam3u-ek/nx/Make.defs
index 20db678224..1f21f21a97 100644
--- a/configs/sam3u-ek/nx/Make.defs
+++ b/configs/sam3u-ek/nx/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam3u-ek/nxwm/Make.defs b/configs/sam3u-ek/nxwm/Make.defs
index 7da2d331d2..c048060450 100644
--- a/configs/sam3u-ek/nxwm/Make.defs
+++ b/configs/sam3u-ek/nxwm/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam3u-ek/src/Makefile b/configs/sam3u-ek/src/Makefile
index c062a22cb6..693f2b790b 100644
--- a/configs/sam3u-ek/src/Makefile
+++ b/configs/sam3u-ek/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c sam_leds.c sam_buttons.c sam_spi.c sam_usbdev.c
 
 ifeq ($(CONFIG_HAVE_CXXINITIALIZE),y)
@@ -66,45 +62,4 @@ ifeq ($(CONFIG_INPUT_ADS7843E),y)
 CSRCS += sam_touchscreen.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sam4e-ek/nsh/Make.defs b/configs/sam4e-ek/nsh/Make.defs
index e053f01cbb..900c558320 100644
--- a/configs/sam4e-ek/nsh/Make.defs
+++ b/configs/sam4e-ek/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4e-ek/nxwm/Make.defs b/configs/sam4e-ek/nxwm/Make.defs
index 63a497eab3..e2402e1580 100644
--- a/configs/sam4e-ek/nxwm/Make.defs
+++ b/configs/sam4e-ek/nxwm/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4e-ek/src/Makefile b/configs/sam4e-ek/src/Makefile
index 8c28707f65..8fcf1b62dd 100644
--- a/configs/sam4e-ek/src/Makefile
+++ b/configs/sam4e-ek/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c sam_leds.c sam_buttons.c sam_udp.c
 
 ifeq ($(CONFIG_HAVE_CXXINITIALIZE),y)
@@ -83,45 +79,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += sam_usbmsc.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sam4e-ek/usbnsh/Make.defs b/configs/sam4e-ek/usbnsh/Make.defs
index 9e0ef625bb..0f4048b4b4 100644
--- a/configs/sam4e-ek/usbnsh/Make.defs
+++ b/configs/sam4e-ek/usbnsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4l-xplained/nsh/Make.defs b/configs/sam4l-xplained/nsh/Make.defs
index 19a2e40bbb..b7315982fe 100644
--- a/configs/sam4l-xplained/nsh/Make.defs
+++ b/configs/sam4l-xplained/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4l-xplained/src/Makefile b/configs/sam4l-xplained/src/Makefile
index ff7c9e38df..9bd55b458a 100644
--- a/configs/sam4l-xplained/src/Makefile
+++ b/configs/sam4l-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -84,45 +80,4 @@ endif
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sam4s-xplained-pro/nsh/Make.defs b/configs/sam4s-xplained-pro/nsh/Make.defs
index 38c19fd53c..6064da7bd1 100644
--- a/configs/sam4s-xplained-pro/nsh/Make.defs
+++ b/configs/sam4s-xplained-pro/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4s-xplained-pro/src/Makefile b/configs/sam4s-xplained-pro/src/Makefile
index e3ebc842f8..225063da12 100644
--- a/configs/sam4s-xplained-pro/src/Makefile
+++ b/configs/sam4s-xplained-pro/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXXINITIALIZE),y)
@@ -76,45 +72,4 @@ ifeq ($(CONFIG_TIMER),y)
 CSRCS += sam_tc.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sam4s-xplained/nsh/Make.defs b/configs/sam4s-xplained/nsh/Make.defs
index 76b42abcaf..8e67c39cca 100644
--- a/configs/sam4s-xplained/nsh/Make.defs
+++ b/configs/sam4s-xplained/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sam4s-xplained/src/Makefile b/configs/sam4s-xplained/src/Makefile
index 0a2ee09550..82173fa00c 100644
--- a/configs/sam4s-xplained/src/Makefile
+++ b/configs/sam4s-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_SAM34_EXTSRAM0),y)
@@ -60,45 +56,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += sam_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sama5d3-xplained/bridge/Make.defs b/configs/sama5d3-xplained/bridge/Make.defs
index 0a8ff1f06b..6c18b0b34c 100644
--- a/configs/sama5d3-xplained/bridge/Make.defs
+++ b/configs/sama5d3-xplained/bridge/Make.defs
@@ -107,6 +107,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3-xplained/nsh/Make.defs b/configs/sama5d3-xplained/nsh/Make.defs
index b71fba1a55..2aaabd56ce 100644
--- a/configs/sama5d3-xplained/nsh/Make.defs
+++ b/configs/sama5d3-xplained/nsh/Make.defs
@@ -107,6 +107,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3-xplained/src/Makefile b/configs/sama5d3-xplained/src/Makefile
index ac03e09f65..2c480b7ddf 100644
--- a/configs/sama5d3-xplained/src/Makefile
+++ b/configs/sama5d3-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -139,45 +135,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += sam_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-a}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-a
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sama5d3x-ek/demo/Make.defs b/configs/sama5d3x-ek/demo/Make.defs
index 62b571695d..61818f2798 100644
--- a/configs/sama5d3x-ek/demo/Make.defs
+++ b/configs/sama5d3x-ek/demo/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/hello/Make.defs b/configs/sama5d3x-ek/hello/Make.defs
index be854ff5d7..da95157152 100644
--- a/configs/sama5d3x-ek/hello/Make.defs
+++ b/configs/sama5d3x-ek/hello/Make.defs
@@ -126,6 +126,7 @@ ifeq ($(WINTOOL),y)
 else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/norboot/Make.defs b/configs/sama5d3x-ek/norboot/Make.defs
index bc5860e197..b6bdfba508 100644
--- a/configs/sama5d3x-ek/norboot/Make.defs
+++ b/configs/sama5d3x-ek/norboot/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/nsh/Make.defs b/configs/sama5d3x-ek/nsh/Make.defs
index add74fbc4f..75a5e46a1a 100644
--- a/configs/sama5d3x-ek/nsh/Make.defs
+++ b/configs/sama5d3x-ek/nsh/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/nx/Make.defs b/configs/sama5d3x-ek/nx/Make.defs
index 43c891990d..59b51f09c9 100644
--- a/configs/sama5d3x-ek/nx/Make.defs
+++ b/configs/sama5d3x-ek/nx/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/nxplayer/Make.defs b/configs/sama5d3x-ek/nxplayer/Make.defs
index 710ec4110b..f3735b2c26 100644
--- a/configs/sama5d3x-ek/nxplayer/Make.defs
+++ b/configs/sama5d3x-ek/nxplayer/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/nxwm/Make.defs b/configs/sama5d3x-ek/nxwm/Make.defs
index a1bc4f2b1e..a724bc7740 100644
--- a/configs/sama5d3x-ek/nxwm/Make.defs
+++ b/configs/sama5d3x-ek/nxwm/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/ov2640/Make.defs b/configs/sama5d3x-ek/ov2640/Make.defs
index 7cde1a1bd9..dd416993d6 100644
--- a/configs/sama5d3x-ek/ov2640/Make.defs
+++ b/configs/sama5d3x-ek/ov2640/Make.defs
@@ -127,6 +127,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d3x-ek/src/Makefile b/configs/sama5d3x-ek/src/Makefile
index e0e57b279d..0a045603da 100644
--- a/configs/sama5d3x-ek/src/Makefile
+++ b/configs/sama5d3x-ek/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -166,45 +162,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += sam_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-a}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-a
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sama5d4-ek/at25boot/Make.defs b/configs/sama5d4-ek/at25boot/Make.defs
index 12309214cc..4ba8d02e11 100644
--- a/configs/sama5d4-ek/at25boot/Make.defs
+++ b/configs/sama5d4-ek/at25boot/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/bridge/Make.defs b/configs/sama5d4-ek/bridge/Make.defs
index 4cdd837556..9b687052cd 100644
--- a/configs/sama5d4-ek/bridge/Make.defs
+++ b/configs/sama5d4-ek/bridge/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/dramboot/Make.defs b/configs/sama5d4-ek/dramboot/Make.defs
index fc9bf8e2fd..c2e6bf72b5 100644
--- a/configs/sama5d4-ek/dramboot/Make.defs
+++ b/configs/sama5d4-ek/dramboot/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/elf/Make.defs b/configs/sama5d4-ek/elf/Make.defs
index 75a4cccbaf..b3b4ccb091 100644
--- a/configs/sama5d4-ek/elf/Make.defs
+++ b/configs/sama5d4-ek/elf/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/ipv6/Make.defs b/configs/sama5d4-ek/ipv6/Make.defs
index 7c28073001..e21884f83d 100644
--- a/configs/sama5d4-ek/ipv6/Make.defs
+++ b/configs/sama5d4-ek/ipv6/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/knsh/Make.defs b/configs/sama5d4-ek/knsh/Make.defs
index ffb4374377..e7e03fcee3 100644
--- a/configs/sama5d4-ek/knsh/Make.defs
+++ b/configs/sama5d4-ek/knsh/Make.defs
@@ -116,6 +116,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/nsh/Make.defs b/configs/sama5d4-ek/nsh/Make.defs
index 40e7306565..dad4f21061 100644
--- a/configs/sama5d4-ek/nsh/Make.defs
+++ b/configs/sama5d4-ek/nsh/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/nxwm/Make.defs b/configs/sama5d4-ek/nxwm/Make.defs
index ce456cabdc..4b6107c00a 100644
--- a/configs/sama5d4-ek/nxwm/Make.defs
+++ b/configs/sama5d4-ek/nxwm/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/ramtest/Make.defs b/configs/sama5d4-ek/ramtest/Make.defs
index 86d7b0990e..5b74a651e0 100644
--- a/configs/sama5d4-ek/ramtest/Make.defs
+++ b/configs/sama5d4-ek/ramtest/Make.defs
@@ -111,6 +111,7 @@ else
   LDELFFLAGS += -T $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/gnu-elf.ld
 endif
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sama5d4-ek/src/Makefile b/configs/sama5d4-ek/src/Makefile
index 169e959311..5ea0176ff2 100644
--- a/configs/sama5d4-ek/src/Makefile
+++ b/configs/sama5d4-ek/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -126,7 +122,6 @@ else
 ifeq ($(CONFIG_BOARD_INITIALIZE),y)
 CSRCS += sam_bringup.c
 endif
-
 endif
 
 ifeq ($(CONFIG_ADC),y)
@@ -155,45 +150,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += sam_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-a}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-a
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/samd20-xplained/nsh/Make.defs b/configs/samd20-xplained/nsh/Make.defs
index 1ba03d1c0d..368ca755c1 100644
--- a/configs/samd20-xplained/nsh/Make.defs
+++ b/configs/samd20-xplained/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samd20-xplained/src/Makefile b/configs/samd20-xplained/src/Makefile
index 66aef7fafc..12bb78dfe3 100644
--- a/configs/samd20-xplained/src/Makefile
+++ b/configs/samd20-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -74,45 +70,4 @@ CSRCS += sam_ug2832hsweg04.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/samd21-xplained/nsh/Make.defs b/configs/samd21-xplained/nsh/Make.defs
index 909b5e30ca..114e19acca 100644
--- a/configs/samd21-xplained/nsh/Make.defs
+++ b/configs/samd21-xplained/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samd21-xplained/src/Makefile b/configs/samd21-xplained/src/Makefile
index 9f47e329df..3b5b853334 100644
--- a/configs/samd21-xplained/src/Makefile
+++ b/configs/samd21-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -74,45 +70,4 @@ CSRCS += sam_ug2832hsweg04.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/saml21-xplained/nsh/Make.defs b/configs/saml21-xplained/nsh/Make.defs
index 82d2c3436a..71cd584c48 100644
--- a/configs/saml21-xplained/nsh/Make.defs
+++ b/configs/saml21-xplained/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/saml21-xplained/src/Makefile b/configs/saml21-xplained/src/Makefile
index f298bf0683..6b939b54b0 100644
--- a/configs/saml21-xplained/src/Makefile
+++ b/configs/saml21-xplained/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -74,45 +70,4 @@ CSRCS += sam_ug2832hsweg04.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/samv71-xult/mxtxplnd/Make.defs b/configs/samv71-xult/mxtxplnd/Make.defs
index cdcdd30736..0a329227c8 100644
--- a/configs/samv71-xult/mxtxplnd/Make.defs
+++ b/configs/samv71-xult/mxtxplnd/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samv71-xult/netnsh/Make.defs b/configs/samv71-xult/netnsh/Make.defs
index 9fe0fefb2f..bd88007ce9 100644
--- a/configs/samv71-xult/netnsh/Make.defs
+++ b/configs/samv71-xult/netnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samv71-xult/nsh/Make.defs b/configs/samv71-xult/nsh/Make.defs
index 65c221225b..2acf48fc8c 100644
--- a/configs/samv71-xult/nsh/Make.defs
+++ b/configs/samv71-xult/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samv71-xult/nxwm/Make.defs b/configs/samv71-xult/nxwm/Make.defs
index ab1f9f06b2..93c86e9450 100644
--- a/configs/samv71-xult/nxwm/Make.defs
+++ b/configs/samv71-xult/nxwm/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/samv71-xult/src/Makefile b/configs/samv71-xult/src/Makefile
index 4cba7ecbe8..17a69202e7 100644
--- a/configs/samv71-xult/src/Makefile
+++ b/configs/samv71-xult/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = sam_boot.c
 
 ifeq ($(CONFIG_SAMV7_SDRAMC),y)
@@ -123,45 +119,4 @@ CSRCS += sam_maxtouch.c sam_atmxtconfig.c
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/shenzhou/nsh/Make.defs b/configs/shenzhou/nsh/Make.defs
index ad481f8166..3c8bda7385 100644
--- a/configs/shenzhou/nsh/Make.defs
+++ b/configs/shenzhou/nsh/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/shenzhou/nxwm/Make.defs b/configs/shenzhou/nxwm/Make.defs
index 73930b1d61..f0f3cc6ed0 100644
--- a/configs/shenzhou/nxwm/Make.defs
+++ b/configs/shenzhou/nxwm/Make.defs
@@ -99,6 +99,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/shenzhou/src/Makefile b/configs/shenzhou/src/Makefile
index 75f839b279..774768904b 100644
--- a/configs/shenzhou/src/Makefile
+++ b/configs/shenzhou/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c stm32_mmcsd.c stm32_chipid.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -104,43 +100,4 @@ ifeq ($(CONFIG_INPUT_ADS7843E),y)
 CSRCS += stm32_touchscreen.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/shenzhou/thttpd/Make.defs b/configs/shenzhou/thttpd/Make.defs
index 7c9082f112..db991f1a9f 100644
--- a/configs/shenzhou/thttpd/Make.defs
+++ b/configs/shenzhou/thttpd/Make.defs
@@ -102,6 +102,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sim/bas/Make.defs b/configs/sim/bas/Make.defs
index b49e86c8e3..0fa6ccd618 100644
--- a/configs/sim/bas/Make.defs
+++ b/configs/sim/bas/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/configdata/Make.defs b/configs/sim/configdata/Make.defs
index 2531b31e12..f27349998a 100644
--- a/configs/sim/configdata/Make.defs
+++ b/configs/sim/configdata/Make.defs
@@ -90,6 +90,7 @@ else
 endif
 
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 
diff --git a/configs/sim/cxxtest/Make.defs b/configs/sim/cxxtest/Make.defs
index 5c9968cabd..65c66b5044 100644
--- a/configs/sim/cxxtest/Make.defs
+++ b/configs/sim/cxxtest/Make.defs
@@ -96,6 +96,7 @@ else
 endif
 
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 
diff --git a/configs/sim/mount/Make.defs b/configs/sim/mount/Make.defs
index 1f0d38b68c..b0ae2cf1b3 100644
--- a/configs/sim/mount/Make.defs
+++ b/configs/sim/mount/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/mtdpart/Make.defs b/configs/sim/mtdpart/Make.defs
index 510fa1283f..b4544b6cc3 100644
--- a/configs/sim/mtdpart/Make.defs
+++ b/configs/sim/mtdpart/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/mtdrwb/Make.defs b/configs/sim/mtdrwb/Make.defs
index 8165f63ca0..f05ff270a3 100644
--- a/configs/sim/mtdrwb/Make.defs
+++ b/configs/sim/mtdrwb/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nettest/Make.defs b/configs/sim/nettest/Make.defs
index 792eae9147..c836487f25 100644
--- a/configs/sim/nettest/Make.defs
+++ b/configs/sim/nettest/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nsh/Make.defs b/configs/sim/nsh/Make.defs
index ba2d38290b..18a33b2a3d 100644
--- a/configs/sim/nsh/Make.defs
+++ b/configs/sim/nsh/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nsh2/Make.defs b/configs/sim/nsh2/Make.defs
index 9b2625bc1d..c9103959da 100644
--- a/configs/sim/nsh2/Make.defs
+++ b/configs/sim/nsh2/Make.defs
@@ -93,6 +93,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nx/Make.defs b/configs/sim/nx/Make.defs
index b1985f83c9..f8cfed3102 100644
--- a/configs/sim/nx/Make.defs
+++ b/configs/sim/nx/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nx11/Make.defs b/configs/sim/nx11/Make.defs
index 41e3d2bf3a..64b490bc8d 100644
--- a/configs/sim/nx11/Make.defs
+++ b/configs/sim/nx11/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nxffs/Make.defs b/configs/sim/nxffs/Make.defs
index 8f0c3d62b0..586fcc9b57 100644
--- a/configs/sim/nxffs/Make.defs
+++ b/configs/sim/nxffs/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/nxlines/Make.defs b/configs/sim/nxlines/Make.defs
index 4ccf4977e9..cadaa123b6 100644
--- a/configs/sim/nxlines/Make.defs
+++ b/configs/sim/nxlines/Make.defs
@@ -90,6 +90,7 @@ else
 endif
 
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 
diff --git a/configs/sim/nxwm/Make.defs b/configs/sim/nxwm/Make.defs
index ef9e0a6493..ab43c4fbeb 100644
--- a/configs/sim/nxwm/Make.defs
+++ b/configs/sim/nxwm/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/ostest/Make.defs b/configs/sim/ostest/Make.defs
index 8b907cf0d8..80e45f0d31 100644
--- a/configs/sim/ostest/Make.defs
+++ b/configs/sim/ostest/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 
diff --git a/configs/sim/pashello/Make.defs b/configs/sim/pashello/Make.defs
index a35828e9fb..6c64d09239 100644
--- a/configs/sim/pashello/Make.defs
+++ b/configs/sim/pashello/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/src/Makefile b/configs/sim/src/Makefile
index 5afc39fb30..23728049e2 100644
--- a/configs/sim/src/Makefile
+++ b/configs/sim/src/Makefile
@@ -35,12 +35,7 @@
 
 include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-CFLAGS += -I$(TOPDIR)/arch/sim/src
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS =
 
 ifeq ($(CONFIG_BOARD_INITIALIZE),y)
@@ -56,37 +51,4 @@ ifeq ($(CONFIG_SIM_TOUCHSCREEN),y)
 endif
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(Q) $(AR) $@ # Create an empty archive
-ifneq ($(OBJS),)
-	$(call ARCHIVE, $@, $(OBJS))
-endif
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sim/touchscreen/Make.defs b/configs/sim/touchscreen/Make.defs
index 21b4908baf..6489316439 100644
--- a/configs/sim/touchscreen/Make.defs
+++ b/configs/sim/touchscreen/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/traveler/Make.defs b/configs/sim/traveler/Make.defs
index f2f76fa72a..1e3baa41ec 100644
--- a/configs/sim/traveler/Make.defs
+++ b/configs/sim/traveler/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/udgram/Make.defs b/configs/sim/udgram/Make.defs
index 3627cfa68f..9e3f894563 100644
--- a/configs/sim/udgram/Make.defs
+++ b/configs/sim/udgram/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/unionfs/Make.defs b/configs/sim/unionfs/Make.defs
index 63e6a06865..5cb5254b8a 100644
--- a/configs/sim/unionfs/Make.defs
+++ b/configs/sim/unionfs/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/sim/ustream/Make.defs b/configs/sim/ustream/Make.defs
index 94c36d7108..f425884858 100644
--- a/configs/sim/ustream/Make.defs
+++ b/configs/sim/ustream/Make.defs
@@ -92,6 +92,7 @@ else
 endif
 
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 
diff --git a/configs/skp16c26/ostest/Make.defs b/configs/skp16c26/ostest/Make.defs
index af3fb2c9f8..91b1a3b02c 100644
--- a/configs/skp16c26/ostest/Make.defs
+++ b/configs/skp16c26/ostest/Make.defs
@@ -68,6 +68,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/spark/composite/Make.defs b/configs/spark/composite/Make.defs
index ebb8ce72e5..1ec991cef1 100644
--- a/configs/spark/composite/Make.defs
+++ b/configs/spark/composite/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/spark/nsh/Make.defs b/configs/spark/nsh/Make.defs
index 9aa372a048..610fe87aa6 100644
--- a/configs/spark/nsh/Make.defs
+++ b/configs/spark/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/spark/src/Makefile b/configs/spark/src/Makefile
index fe6b4dd460..dcf7a2eb35 100644
--- a/configs/spark/src/Makefile
+++ b/configs/spark/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -81,43 +77,4 @@ ifeq ($(CONFIG_CC3000_PROBES),)
 CSRCS += stm32_io.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-          -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-          -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/spark/usbmsc/Make.defs b/configs/spark/usbmsc/Make.defs
index 1b08140c55..fcf9c81892 100644
--- a/configs/spark/usbmsc/Make.defs
+++ b/configs/spark/usbmsc/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/spark/usbnsh/Make.defs b/configs/spark/usbnsh/Make.defs
index ba71fde809..b9c0e2e75b 100644
--- a/configs/spark/usbnsh/Make.defs
+++ b/configs/spark/usbnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/spark/usbserial/Make.defs b/configs/spark/usbserial/Make.defs
index bdb03c8131..da7f56bde0 100644
--- a/configs/spark/usbserial/Make.defs
+++ b/configs/spark/usbserial/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/buttons/Make.defs b/configs/stm3210e-eval/buttons/Make.defs
index 4e8f387751..83712d237d 100644
--- a/configs/stm3210e-eval/buttons/Make.defs
+++ b/configs/stm3210e-eval/buttons/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/composite/Make.defs b/configs/stm3210e-eval/composite/Make.defs
index 40b0e07a04..25f6d3d95c 100644
--- a/configs/stm3210e-eval/composite/Make.defs
+++ b/configs/stm3210e-eval/composite/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/nsh/Make.defs b/configs/stm3210e-eval/nsh/Make.defs
index efcd667396..fd88105b07 100644
--- a/configs/stm3210e-eval/nsh/Make.defs
+++ b/configs/stm3210e-eval/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/nsh2/Make.defs b/configs/stm3210e-eval/nsh2/Make.defs
index 8eec4a6b50..252b05c929 100644
--- a/configs/stm3210e-eval/nsh2/Make.defs
+++ b/configs/stm3210e-eval/nsh2/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/nx/Make.defs b/configs/stm3210e-eval/nx/Make.defs
index 132df9e162..103a6f940f 100644
--- a/configs/stm3210e-eval/nx/Make.defs
+++ b/configs/stm3210e-eval/nx/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/nxterm/Make.defs b/configs/stm3210e-eval/nxterm/Make.defs
index 73f8098de5..1793f4b566 100644
--- a/configs/stm3210e-eval/nxterm/Make.defs
+++ b/configs/stm3210e-eval/nxterm/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/pm/Make.defs b/configs/stm3210e-eval/pm/Make.defs
index c59766b9b3..b074d42de7 100644
--- a/configs/stm3210e-eval/pm/Make.defs
+++ b/configs/stm3210e-eval/pm/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/src/Makefile b/configs/stm3210e-eval/src/Makefile
index cc5f8c2686..84ecd43291 100644
--- a/configs/stm3210e-eval/src/Makefile
+++ b/configs/stm3210e-eval/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_spi.c stm32_usbdev.c
 
 ifeq ($(CONFIG_STM32_FSMC),y)
@@ -96,43 +92,4 @@ ifeq ($(CONFIG_ARCH_IDLE_CUSTOM),y)
 CSRCS += stm32_idle.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm3210e-eval/usbmsc/Make.defs b/configs/stm3210e-eval/usbmsc/Make.defs
index db17fddec6..7771aba1f7 100644
--- a/configs/stm3210e-eval/usbmsc/Make.defs
+++ b/configs/stm3210e-eval/usbmsc/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3210e-eval/usbserial/Make.defs b/configs/stm3210e-eval/usbserial/Make.defs
index 623792e1c7..69e37b55e2 100644
--- a/configs/stm3210e-eval/usbserial/Make.defs
+++ b/configs/stm3210e-eval/usbserial/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/dhcpd/Make.defs b/configs/stm3220g-eval/dhcpd/Make.defs
index 9e2a0a321c..4e136051ce 100644
--- a/configs/stm3220g-eval/dhcpd/Make.defs
+++ b/configs/stm3220g-eval/dhcpd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/nettest/Make.defs b/configs/stm3220g-eval/nettest/Make.defs
index e0bd16d45f..a7ca3caa52 100644
--- a/configs/stm3220g-eval/nettest/Make.defs
+++ b/configs/stm3220g-eval/nettest/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/nsh/Make.defs b/configs/stm3220g-eval/nsh/Make.defs
index 5f7770a56c..f07a98bf18 100644
--- a/configs/stm3220g-eval/nsh/Make.defs
+++ b/configs/stm3220g-eval/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/nsh2/Make.defs b/configs/stm3220g-eval/nsh2/Make.defs
index dc69c28357..59285405bf 100644
--- a/configs/stm3220g-eval/nsh2/Make.defs
+++ b/configs/stm3220g-eval/nsh2/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/nxwm/Make.defs b/configs/stm3220g-eval/nxwm/Make.defs
index 16bc580752..b7b945e1e0 100644
--- a/configs/stm3220g-eval/nxwm/Make.defs
+++ b/configs/stm3220g-eval/nxwm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3220g-eval/src/Makefile b/configs/stm3220g-eval/src/Makefile
index 972e5d8a13..7f70c56c5f 100644
--- a/configs/stm3220g-eval/src/Makefile
+++ b/configs/stm3220g-eval/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -88,43 +84,4 @@ ifeq ($(CONFIG_INPUT_STMPE811),y)
 CSRCS += stm32_stmpe811.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm3220g-eval/telnetd/Make.defs b/configs/stm3220g-eval/telnetd/Make.defs
index 7eb4a42b89..8134a942c9 100644
--- a/configs/stm3220g-eval/telnetd/Make.defs
+++ b/configs/stm3220g-eval/telnetd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/dhcpd/Make.defs b/configs/stm3240g-eval/dhcpd/Make.defs
index 10666d67ac..8baed8c190 100644
--- a/configs/stm3240g-eval/dhcpd/Make.defs
+++ b/configs/stm3240g-eval/dhcpd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/discover/Make.defs b/configs/stm3240g-eval/discover/Make.defs
index 0290973fee..df22d647eb 100644
--- a/configs/stm3240g-eval/discover/Make.defs
+++ b/configs/stm3240g-eval/discover/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/knxwm/Make.defs b/configs/stm3240g-eval/knxwm/Make.defs
index c82c104c3e..d6adeaac32 100644
--- a/configs/stm3240g-eval/knxwm/Make.defs
+++ b/configs/stm3240g-eval/knxwm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nettest/Make.defs b/configs/stm3240g-eval/nettest/Make.defs
index 5e2e4989a0..c6ddb070d6 100644
--- a/configs/stm3240g-eval/nettest/Make.defs
+++ b/configs/stm3240g-eval/nettest/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nsh/Make.defs b/configs/stm3240g-eval/nsh/Make.defs
index 9c0d1f22cc..ec79540a39 100644
--- a/configs/stm3240g-eval/nsh/Make.defs
+++ b/configs/stm3240g-eval/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nsh2/Make.defs b/configs/stm3240g-eval/nsh2/Make.defs
index ff9c431c47..b53a86b30c 100644
--- a/configs/stm3240g-eval/nsh2/Make.defs
+++ b/configs/stm3240g-eval/nsh2/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nxterm/Make.defs b/configs/stm3240g-eval/nxterm/Make.defs
index 008f8f4935..752c82473a 100644
--- a/configs/stm3240g-eval/nxterm/Make.defs
+++ b/configs/stm3240g-eval/nxterm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/nxwm/Make.defs b/configs/stm3240g-eval/nxwm/Make.defs
index 14417676de..57b74356d8 100644
--- a/configs/stm3240g-eval/nxwm/Make.defs
+++ b/configs/stm3240g-eval/nxwm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/src/Makefile b/configs/stm3240g-eval/src/Makefile
index 47694793b7..bc656936bf 100644
--- a/configs/stm3240g-eval/src/Makefile
+++ b/configs/stm3240g-eval/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -93,43 +89,4 @@ ifeq ($(CONFIG_QENCODER),y)
 CSRCS += stm32_qencoder.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm3240g-eval/telnetd/Make.defs b/configs/stm3240g-eval/telnetd/Make.defs
index 4d5fbc140c..9957810fcf 100644
--- a/configs/stm3240g-eval/telnetd/Make.defs
+++ b/configs/stm3240g-eval/telnetd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/webserver/Make.defs b/configs/stm3240g-eval/webserver/Make.defs
index f2799bafec..cd6ecd5385 100644
--- a/configs/stm3240g-eval/webserver/Make.defs
+++ b/configs/stm3240g-eval/webserver/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm3240g-eval/xmlrpc/Make.defs b/configs/stm3240g-eval/xmlrpc/Make.defs
index cedbbf2792..1883fe20df 100644
--- a/configs/stm3240g-eval/xmlrpc/Make.defs
+++ b/configs/stm3240g-eval/xmlrpc/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32_tiny/nsh/Make.defs b/configs/stm32_tiny/nsh/Make.defs
index 92c5b7b7d9..a76544a8d7 100644
--- a/configs/stm32_tiny/nsh/Make.defs
+++ b/configs/stm32_tiny/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32_tiny/src/Makefile b/configs/stm32_tiny/src/Makefile
index 6fb6bcc26e..64fec8342b 100644
--- a/configs/stm32_tiny/src/Makefile
+++ b/configs/stm32_tiny/src/Makefile
@@ -36,11 +36,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_spi.c stm32_usbdev.c
 
 ifeq ($(CONFIG_PWM),y)
@@ -59,43 +55,4 @@ ifeq ($(CONFIG_WATCHDOG),y)
 CSRCS += stm32_watchdog.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32_tiny/usbnsh/Make.defs b/configs/stm32_tiny/usbnsh/Make.defs
index b7bf76cef6..5a4754d530 100644
--- a/configs/stm32_tiny/usbnsh/Make.defs
+++ b/configs/stm32_tiny/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f3discovery/nsh/Make.defs b/configs/stm32f3discovery/nsh/Make.defs
index 620e499386..9e207453fc 100644
--- a/configs/stm32f3discovery/nsh/Make.defs
+++ b/configs/stm32f3discovery/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f3discovery/src/Makefile b/configs/stm32f3discovery/src/Makefile
index f9069ec67f..5a4e5bd98e 100644
--- a/configs/stm32f3discovery/src/Makefile
+++ b/configs/stm32f3discovery/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -76,47 +72,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += stm32_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32f3discovery/usbnsh/Make.defs b/configs/stm32f3discovery/usbnsh/Make.defs
index 71e07fc60b..30ba9032a9 100644
--- a/configs/stm32f3discovery/usbnsh/Make.defs
+++ b/configs/stm32f3discovery/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/extflash/Make.defs b/configs/stm32f429i-disco/extflash/Make.defs
index e66058c194..e7c562b7af 100644
--- a/configs/stm32f429i-disco/extflash/Make.defs
+++ b/configs/stm32f429i-disco/extflash/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/lcd/Make.defs b/configs/stm32f429i-disco/lcd/Make.defs
index 37dfc4345a..507caea08a 100644
--- a/configs/stm32f429i-disco/lcd/Make.defs
+++ b/configs/stm32f429i-disco/lcd/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/ltdc/Make.defs b/configs/stm32f429i-disco/ltdc/Make.defs
index 0b140133fe..362ef36db0 100644
--- a/configs/stm32f429i-disco/ltdc/Make.defs
+++ b/configs/stm32f429i-disco/ltdc/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/nsh/Make.defs b/configs/stm32f429i-disco/nsh/Make.defs
index 4edf1ac1c2..11016f7205 100644
--- a/configs/stm32f429i-disco/nsh/Make.defs
+++ b/configs/stm32f429i-disco/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/src/Makefile b/configs/stm32f429i-disco/src/Makefile
index 93ba4835bd..a6ee894438 100644
--- a/configs/stm32f429i-disco/src/Makefile
+++ b/configs/stm32f429i-disco/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -87,47 +83,4 @@ ifeq ($(CONFIG_ARCH_FPU),y)
 CSRCS += stm32_ostest.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32f429i-disco/usbmsc/Make.defs b/configs/stm32f429i-disco/usbmsc/Make.defs
index e66058c194..e7c562b7af 100644
--- a/configs/stm32f429i-disco/usbmsc/Make.defs
+++ b/configs/stm32f429i-disco/usbmsc/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f429i-disco/usbnsh/Make.defs b/configs/stm32f429i-disco/usbnsh/Make.defs
index e66058c194..e7c562b7af 100644
--- a/configs/stm32f429i-disco/usbnsh/Make.defs
+++ b/configs/stm32f429i-disco/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/cxxtest/Make.defs b/configs/stm32f4discovery/cxxtest/Make.defs
index c0d12169bd..190d44ae44 100644
--- a/configs/stm32f4discovery/cxxtest/Make.defs
+++ b/configs/stm32f4discovery/cxxtest/Make.defs
@@ -103,6 +103,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/elf/Make.defs b/configs/stm32f4discovery/elf/Make.defs
index 710ca8ba6b..32a4239926 100644
--- a/configs/stm32f4discovery/elf/Make.defs
+++ b/configs/stm32f4discovery/elf/Make.defs
@@ -109,6 +109,7 @@ endif
 
 # File extensions
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/ipv6/Make.defs b/configs/stm32f4discovery/ipv6/Make.defs
index 12afb4e400..4110b5af75 100644
--- a/configs/stm32f4discovery/ipv6/Make.defs
+++ b/configs/stm32f4discovery/ipv6/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/kostest/Make.defs b/configs/stm32f4discovery/kostest/Make.defs
index 283e20a3be..4cf8cea33e 100644
--- a/configs/stm32f4discovery/kostest/Make.defs
+++ b/configs/stm32f4discovery/kostest/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/netnsh/Make.defs b/configs/stm32f4discovery/netnsh/Make.defs
index 06f6462a0a..29c4533db0 100644
--- a/configs/stm32f4discovery/netnsh/Make.defs
+++ b/configs/stm32f4discovery/netnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/nsh/Make.defs b/configs/stm32f4discovery/nsh/Make.defs
index 4696571890..dd2c979210 100644
--- a/configs/stm32f4discovery/nsh/Make.defs
+++ b/configs/stm32f4discovery/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/nxlines/Make.defs b/configs/stm32f4discovery/nxlines/Make.defs
index c9097a420e..1d77f51f0d 100644
--- a/configs/stm32f4discovery/nxlines/Make.defs
+++ b/configs/stm32f4discovery/nxlines/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/pm/Make.defs b/configs/stm32f4discovery/pm/Make.defs
index 07f7d01f88..ccb4d3c3fc 100644
--- a/configs/stm32f4discovery/pm/Make.defs
+++ b/configs/stm32f4discovery/pm/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/posix_spawn/Make.defs b/configs/stm32f4discovery/posix_spawn/Make.defs
index 7b40351a13..6e22c95481 100644
--- a/configs/stm32f4discovery/posix_spawn/Make.defs
+++ b/configs/stm32f4discovery/posix_spawn/Make.defs
@@ -109,6 +109,7 @@ endif
 
 # File extensions
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/src/Makefile b/configs/stm32f4discovery/src/Makefile
index 2adf164f4b..92e97ae433 100644
--- a/configs/stm32f4discovery/src/Makefile
+++ b/configs/stm32f4discovery/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_bringup.c stm32_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -108,47 +104,4 @@ ifeq ($(CONFIG_LCD_UG2864HSWEG01),y)
 CSRCS += stm32_ug2864hsweg01.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32f4discovery/usbnsh/Make.defs b/configs/stm32f4discovery/usbnsh/Make.defs
index 4a5dc6e082..421ee63216 100644
--- a/configs/stm32f4discovery/usbnsh/Make.defs
+++ b/configs/stm32f4discovery/usbnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f4discovery/winbuild/Make.defs b/configs/stm32f4discovery/winbuild/Make.defs
index ea4fc050d3..cfc4261cbf 100644
--- a/configs/stm32f4discovery/winbuild/Make.defs
+++ b/configs/stm32f4discovery/winbuild/Make.defs
@@ -81,6 +81,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)\binfmt\libnxflat\gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f746g-disco/knsh/Make.defs b/configs/stm32f746g-disco/knsh/Make.defs
index 4afdad55c3..d4200d1c24 100644
--- a/configs/stm32f746g-disco/knsh/Make.defs
+++ b/configs/stm32f746g-disco/knsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f746g-disco/netnsh/Make.defs b/configs/stm32f746g-disco/netnsh/Make.defs
index b62bdfaebd..7ee007aafa 100644
--- a/configs/stm32f746g-disco/netnsh/Make.defs
+++ b/configs/stm32f746g-disco/netnsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f746g-disco/nsh/Make.defs b/configs/stm32f746g-disco/nsh/Make.defs
index 03492adde7..a010feb09f 100644
--- a/configs/stm32f746g-disco/nsh/Make.defs
+++ b/configs/stm32f746g-disco/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32f746g-disco/src/Makefile b/configs/stm32f746g-disco/src/Makefile
index b8c7c79e32..39e6a7f178 100644
--- a/configs/stm32f746g-disco/src/Makefile
+++ b/configs/stm32f746g-disco/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -64,47 +60,4 @@ ifeq ($(CONFIG_SPORADIC_INSTRUMENTATION),y)
 CSRCS += stm32_sporadic.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32ldiscovery/nsh/Make.defs b/configs/stm32ldiscovery/nsh/Make.defs
index 9c10653acf..8efa03ac4e 100644
--- a/configs/stm32ldiscovery/nsh/Make.defs
+++ b/configs/stm32ldiscovery/nsh/Make.defs
@@ -93,6 +93,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32ldiscovery/src/Makefile b/configs/stm32ldiscovery/src/Makefile
index 483ad79f26..737135dab8 100644
--- a/configs/stm32ldiscovery/src/Makefile
+++ b/configs/stm32ldiscovery/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -76,47 +72,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += stm32_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/stm32vldiscovery/nsh/Make.defs b/configs/stm32vldiscovery/nsh/Make.defs
index 573ea44afe..2ba3420459 100644
--- a/configs/stm32vldiscovery/nsh/Make.defs
+++ b/configs/stm32vldiscovery/nsh/Make.defs
@@ -94,6 +94,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/stm32vldiscovery/src/Makefile b/configs/stm32vldiscovery/src/Makefile
index a9cbd3cf3f..c8ef054cf9 100644
--- a/configs/stm32vldiscovery/src/Makefile
+++ b/configs/stm32vldiscovery/src/Makefile
@@ -37,46 +37,6 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_buttons.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sure-pic32mx/nsh/Make.defs b/configs/sure-pic32mx/nsh/Make.defs
index c276cd4941..ef3ef62026 100644
--- a/configs/sure-pic32mx/nsh/Make.defs
+++ b/configs/sure-pic32mx/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/sure-pic32mx/src/Makefile b/configs/sure-pic32mx/src/Makefile
index 1a26a83ee2..c5d918c388 100644
--- a/configs/sure-pic32mx/src/Makefile
+++ b/configs/sure-pic32mx/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32mx_boot.c pic32mx_spi.c
 
@@ -68,44 +66,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += pic32mx_nsh.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/sure-pic32mx/usbnsh/Make.defs b/configs/sure-pic32mx/usbnsh/Make.defs
index 92b5583849..91e97da515 100644
--- a/configs/sure-pic32mx/usbnsh/Make.defs
+++ b/configs/sure-pic32mx/usbnsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-2.0/hello/Make.defs b/configs/teensy-2.0/hello/Make.defs
index 0d9b4f921d..f5f10cdba5 100644
--- a/configs/teensy-2.0/hello/Make.defs
+++ b/configs/teensy-2.0/hello/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-2.0/nsh/Make.defs b/configs/teensy-2.0/nsh/Make.defs
index b6e6082cb8..03a23cd836 100644
--- a/configs/teensy-2.0/nsh/Make.defs
+++ b/configs/teensy-2.0/nsh/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-2.0/src/Makefile b/configs/teensy-2.0/src/Makefile
index b623980fd4..48e413ceda 100644
--- a/configs/teensy-2.0/src/Makefile
+++ b/configs/teensy-2.0/src/Makefile
@@ -48,55 +48,4 @@ ifeq ($(CONFIG_AVR_SPI),y)
 CSRCS += at90usb_spi.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_ARCH_FAMILY_AVR32),y)
-ARCH_SUBDIR = avr32
-endif
-ifeq ($(CONFIG_ARCH_FAMILY_AVR),y)
-ARCH_SUBDIR = avr
-endif
-
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/$(ARCH_SUBDIR)}"
-else
-  CFLAGS += -I "$(TOPDIR)/sched"
-  CFLAGS += -I "$(ARCH_SRCDIR)/chip"
-  CFLAGS += -I "$(ARCH_SRCDIR)/common"
-  CFLAGS += -I "$(ARCH_SRCDIR)/$(ARCH_SUBDIR)"
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/teensy-2.0/usbmsc/Make.defs b/configs/teensy-2.0/usbmsc/Make.defs
index fb56076097..84ed1bb223 100644
--- a/configs/teensy-2.0/usbmsc/Make.defs
+++ b/configs/teensy-2.0/usbmsc/Make.defs
@@ -86,6 +86,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-3.x/nsh/Make.defs b/configs/teensy-3.x/nsh/Make.defs
index b3ba02965b..194b383ea8 100644
--- a/configs/teensy-3.x/nsh/Make.defs
+++ b/configs/teensy-3.x/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-3.x/src/Makefile b/configs/teensy-3.x/src/Makefile
index 4c7cee11ac..33232755f8 100644
--- a/configs/teensy-3.x/src/Makefile
+++ b/configs/teensy-3.x/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = k20_boot.c k20_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -52,42 +48,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += k20_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-      -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-      -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/teensy-lc/nsh/Make.defs b/configs/teensy-lc/nsh/Make.defs
index e63183f28e..834b319fce 100644
--- a/configs/teensy-lc/nsh/Make.defs
+++ b/configs/teensy-lc/nsh/Make.defs
@@ -89,6 +89,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/teensy-lc/src/Makefile b/configs/teensy-lc/src/Makefile
index df1d2fa9c8..e48b316136 100644
--- a/configs/teensy-lc/src/Makefile
+++ b/configs/teensy-lc/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = kl_boardinitialize.c
 
 ifeq ($(CONFIG_LIB_BOARDCTL),y)
@@ -66,47 +62,4 @@ ifeq ($(CONFIG_PWM),y)
 CSRCS += kl_pwm.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  CFLAGS += -I$(ARCH_SRCDIR)\chip -I$(ARCH_SRCDIR)\common -I$(ARCH_SRCDIR)\armv7-m
-else
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-			-I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/tm4c123g-launchpad/nsh/Make.defs b/configs/tm4c123g-launchpad/nsh/Make.defs
index 1320fb1bf0..7213f12548 100644
--- a/configs/tm4c123g-launchpad/nsh/Make.defs
+++ b/configs/tm4c123g-launchpad/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/tm4c123g-launchpad/src/Makefile b/configs/tm4c123g-launchpad/src/Makefile
index 55043fae96..a3bc4f9acf 100644
--- a/configs/tm4c123g-launchpad/src/Makefile
+++ b/configs/tm4c123g-launchpad/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = tm4c_boot.c tm4c_bringup.c tm4c_ssi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -67,43 +64,4 @@ ifeq ($(CONFIG_ARCH_BUTTONS),y)
 CSRCS += tm4c_buttons.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/tm4c1294-launchpad/ipv6/Make.defs b/configs/tm4c1294-launchpad/ipv6/Make.defs
index 83a2a6cda1..5be1a4b852 100644
--- a/configs/tm4c1294-launchpad/ipv6/Make.defs
+++ b/configs/tm4c1294-launchpad/ipv6/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/tm4c1294-launchpad/nsh/Make.defs b/configs/tm4c1294-launchpad/nsh/Make.defs
index 3fdb4b9581..82211fa6e7 100644
--- a/configs/tm4c1294-launchpad/nsh/Make.defs
+++ b/configs/tm4c1294-launchpad/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/tm4c1294-launchpad/src/Makefile b/configs/tm4c1294-launchpad/src/Makefile
index 4895ec2161..aeb66d3ae5 100644
--- a/configs/tm4c1294-launchpad/src/Makefile
+++ b/configs/tm4c1294-launchpad/src/Makefile
@@ -35,10 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = tm4c_boot.c tm4c_bringup.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -63,43 +60,4 @@ ifeq ($(CONFIG_NSH_ARCHINIT),y)
 CSRCS += tm4c_nsh.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/twr-k60n512/nsh/Make.defs b/configs/twr-k60n512/nsh/Make.defs
index b7a066fb4f..6d5380358a 100644
--- a/configs/twr-k60n512/nsh/Make.defs
+++ b/configs/twr-k60n512/nsh/Make.defs
@@ -91,6 +91,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/twr-k60n512/src/Makefile b/configs/twr-k60n512/src/Makefile
index c94e462444..026834b66a 100644
--- a/configs/twr-k60n512/src/Makefile
+++ b/configs/twr-k60n512/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = k60_boot.c k60_spi.c
 
 ifeq ($(CONFIG_ARCH_LEDS),y)
@@ -62,43 +58,4 @@ ifeq ($(CONFIG_USBMSC),y)
 CSRCS += k60_usbmsc.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/ubw32/nsh/Make.defs b/configs/ubw32/nsh/Make.defs
index 21ea6bfa48..704db6e091 100644
--- a/configs/ubw32/nsh/Make.defs
+++ b/configs/ubw32/nsh/Make.defs
@@ -87,6 +87,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/ubw32/src/Makefile b/configs/ubw32/src/Makefile
index 80ee9a09ac..b3cd1971b1 100644
--- a/configs/ubw32/src/Makefile
+++ b/configs/ubw32/src/Makefile
@@ -35,8 +35,6 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
 CSRCS = pic32_boot.c pic32_leds.c
 
@@ -55,44 +53,4 @@ CSRCS += pic32_usbterm.c
 endif
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/mips32}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/mips32
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/us7032evb1/nsh/Make.defs b/configs/us7032evb1/nsh/Make.defs
index 29b85b7057..60f929362f 100644
--- a/configs/us7032evb1/nsh/Make.defs
+++ b/configs/us7032evb1/nsh/Make.defs
@@ -65,6 +65,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/us7032evb1/ostest/Make.defs b/configs/us7032evb1/ostest/Make.defs
index a7139db5d6..2b17ba9a4e 100644
--- a/configs/us7032evb1/ostest/Make.defs
+++ b/configs/us7032evb1/ostest/Make.defs
@@ -65,6 +65,7 @@ CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
 CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
 AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
 
+ASMEXT			= .S
 OBJEXT			= .o
 LIBEXT			= .a
 EXEEXT			=
diff --git a/configs/viewtool-stm32f107/highpri/Make.defs b/configs/viewtool-stm32f107/highpri/Make.defs
index 7fdbc3d17d..a2666368f3 100644
--- a/configs/viewtool-stm32f107/highpri/Make.defs
+++ b/configs/viewtool-stm32f107/highpri/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/viewtool-stm32f107/netnsh/Make.defs b/configs/viewtool-stm32f107/netnsh/Make.defs
index 76b1ba8f28..fd98f05385 100644
--- a/configs/viewtool-stm32f107/netnsh/Make.defs
+++ b/configs/viewtool-stm32f107/netnsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/viewtool-stm32f107/nsh/Make.defs b/configs/viewtool-stm32f107/nsh/Make.defs
index 950642a556..8dc3506298 100644
--- a/configs/viewtool-stm32f107/nsh/Make.defs
+++ b/configs/viewtool-stm32f107/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-gotoff.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/viewtool-stm32f107/src/Makefile b/configs/viewtool-stm32f107/src/Makefile
index b46404cf09..b544590154 100644
--- a/configs/viewtool-stm32f107/src/Makefile
+++ b/configs/viewtool-stm32f107/src/Makefile
@@ -35,11 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS += -I$(TOPDIR)/sched
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-
 CSRCS = stm32_boot.c stm32_leds.c stm32_spi.c
 
 ifeq ($(CONFIG_HAVE_CXX),y)
@@ -90,43 +86,4 @@ ifeq ($(CONFIG_VIEWTOOL_HIGHPRI),y)
 CSRCS += stm32_highpri.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR	= $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-    -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-    -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/vsn/nsh/Make.defs b/configs/vsn/nsh/Make.defs
index 851c6e7d5b..9f64c27146 100644
--- a/configs/vsn/nsh/Make.defs
+++ b/configs/vsn/nsh/Make.defs
@@ -97,6 +97,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/xtrs/src/Makefile b/configs/xtrs/src/Makefile
index 88062864b7..4398bf214a 100644
--- a/configs/xtrs/src/Makefile
+++ b/configs/xtrs/src/Makefile
@@ -35,42 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)$(DELIM)sched -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)common -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)z80
+ASRCS =
+CSRCS = xtr_irq.c xtr_serial.c xtr_timerisr.c xtr_lowputc.c
 
-ASRCS		=
-AOBJS		= $(ASRCS:$(ASMEXT)=$(OBJEXT))
-CSRCS		= xtr_irq.c xtr_serial.c xtr_timerisr.c xtr_lowputc.c
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-CFLAGS		+= -I $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-CFLAGS		+= -I $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)include
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/z16f2800100zcog/src/Makefile b/configs/z16f2800100zcog/src/Makefile
index 604269c722..db25fa8f4a 100644
--- a/configs/z16f2800100zcog/src/Makefile
+++ b/configs/z16f2800100zcog/src/Makefile
@@ -35,56 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = z16f_lowinit.c z16f_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) $< -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/z80sim/src/Makefile b/configs/z80sim/src/Makefile
index e35674fc46..0410aedf32 100644
--- a/configs/z80sim/src/Makefile
+++ b/configs/z80sim/src/Makefile
@@ -35,43 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-CFLAGS		+= -I$(TOPDIR)$(DELIM)sched
-CFLAGS		+= -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)common
-CFLAGS		+= -I$(TOPDIR)$(DELIM)arch$(DELIM)z80$(DELIM)src$(DELIM)z80
+ASRCS =
+CSRCS = z80_irq.c z80_serial.c z80_timerisr.c z80_lowputc.c
 
-ASRCS		=
-AOBJS		= $(ASRCS:$(ASMEXT)=$(OBJEXT))
-CSRCS		= z80_irq.c z80_serial.c z80_timerisr.c z80_lowputc.c
-COBJS		= $(CSRCS:.c=$(OBJEXT))
-
-SRCS		= $(ASRCS) $(CSRCS)
-OBJS		= $(AOBJS) $(COBJS)
-
-CFLAGS		+= -I $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/z8encore000zco/src/Makefile b/configs/z8encore000zco/src/Makefile
index 76de8d4ae5..7696ccc280 100644
--- a/configs/z8encore000zco/src/Makefile
+++ b/configs/z8encore000zco/src/Makefile
@@ -35,56 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = z8_lowinit.c z8_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) `cygpath -w $<` -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/z8f64200100kit/src/Makefile b/configs/z8f64200100kit/src/Makefile
index 22e06fb5b1..9aa595da23 100644
--- a/configs/z8f64200100kit/src/Makefile
+++ b/configs/z8f64200100kit/src/Makefile
@@ -35,56 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-SCHEDSRCDIR = $(TOPDIR)$(DELIM)sched
-ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
-
-ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  USRINCLUDES = -usrinc:".;$(SCHEDSRCDIR);$(ARCHSRCDIR);$(ARCHSRCDIR)\common"
-else
-  WSCHEDSRCDIR = ${shell cygpath -w $(SCHEDSRCDIR)}
-  WARCHSRCDIR = ${shell cygpath -w $(ARCHSRCDIR)}
-  USRINCLUDES = -usrinc:'.;$(WSCHEDSRCDIR);$(WARCHSRCDIR);$(WARCHSRCDIR)\common'
-endif
-
-INCLUDES = $(ARCHSTDINCLUDES) $(USRINCLUDES)
-CFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(INCLUDES) $(ARCHDEFINES) $(EXTRADEFINES)
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS = z8_lowinit.c z8_leds.c
-COBJS = $(CSRCS:.c=$(OBJEXT))
 
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-all: libboard$(LIBEXT)
-
-$(ASRCS) $(HEAD_ASRC): %$(ASMEXT): %.S
-	$(Q) $(CPP) $(CPPFLAGS) `cygpath -w $<` -o $@.tmp
-	$(Q) cat $@.tmp | sed -e "s/^#/;/g" > $@
-	$(Q) rm $@.tmp
-
-$(AOBJS): %$(OBJEXT): %$(ASMEXT)
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/zkit-arm-1769/hello/Make.defs b/configs/zkit-arm-1769/hello/Make.defs
index 4658f51c13..e62ea7e9fe 100644
--- a/configs/zkit-arm-1769/hello/Make.defs
+++ b/configs/zkit-arm-1769/hello/Make.defs
@@ -101,6 +101,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zkit-arm-1769/nsh/Make.defs b/configs/zkit-arm-1769/nsh/Make.defs
index 58142c8e11..62f4294caa 100644
--- a/configs/zkit-arm-1769/nsh/Make.defs
+++ b/configs/zkit-arm-1769/nsh/Make.defs
@@ -101,6 +101,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zkit-arm-1769/nxhello/Make.defs b/configs/zkit-arm-1769/nxhello/Make.defs
index 7fc77d1993..b7a5731c8b 100644
--- a/configs/zkit-arm-1769/nxhello/Make.defs
+++ b/configs/zkit-arm-1769/nxhello/Make.defs
@@ -101,6 +101,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zkit-arm-1769/src/Makefile b/configs/zkit-arm-1769/src/Makefile
index 15a56ec92b..3477cac14c 100644
--- a/configs/zkit-arm-1769/src/Makefile
+++ b/configs/zkit-arm-1769/src/Makefile
@@ -67,48 +67,4 @@ ifeq ($(CONFIG_LPC17_SPI),y)
 CSRCS += lpc17_spi.c
 endif
 
-AOBJS = $(ASRCS:.S=$(OBJEXT))
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(TOPDIR)/sched}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/common}"
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/armv7-m}"
-else
-  CFLAGS += -I$(TOPDIR)/sched
-  CFLAGS += -I$(ARCH_SRCDIR)/chip
-  CFLAGS += -I$(ARCH_SRCDIR)/common
-  CFLAGS += -I$(ARCH_SRCDIR)/armv7-m
-endif
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk
diff --git a/configs/zkit-arm-1769/thttpd/Make.defs b/configs/zkit-arm-1769/thttpd/Make.defs
index 3ad564cf89..5875f5fb4f 100644
--- a/configs/zkit-arm-1769/thttpd/Make.defs
+++ b/configs/zkit-arm-1769/thttpd/Make.defs
@@ -101,6 +101,7 @@ NXFLATLDFLAGS1 = -r -d -warn-common
 NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) $(NXFLATLDSCRIPT) -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zp214xpa/nsh/Make.defs b/configs/zp214xpa/nsh/Make.defs
index dcb87ced58..6e775fedac 100644
--- a/configs/zp214xpa/nsh/Make.defs
+++ b/configs/zp214xpa/nsh/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zp214xpa/nxlines/Make.defs b/configs/zp214xpa/nxlines/Make.defs
index 8a29ceaf28..918c9c18b8 100644
--- a/configs/zp214xpa/nxlines/Make.defs
+++ b/configs/zp214xpa/nxlines/Make.defs
@@ -107,6 +107,7 @@ NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) \
                  -no-check-sections
 LDNXFLATFLAGS = -e main -s 2048
 
+ASMEXT = .S
 OBJEXT = .o
 LIBEXT = .a
 EXEEXT =
diff --git a/configs/zp214xpa/src/Makefile b/configs/zp214xpa/src/Makefile
index 6884c9335e..78bf980efe 100644
--- a/configs/zp214xpa/src/Makefile
+++ b/configs/zp214xpa/src/Makefile
@@ -35,18 +35,7 @@
 
 -include $(TOPDIR)/Make.defs
 
-ARCH_SRCDIR = $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-ifeq ($(WINTOOL),y)
-  CFLAGS += -I "${shell cygpath -w $(ARCH_SRCDIR)/chip}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/common}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/arm}" \
-            -I "${shell cygpath -w $(ARCH_SRCDIR)/sched}"
-else
-  CFLAGS += -I$(ARCH_SRCDIR)/chip -I$(ARCH_SRCDIR)/common -I$(ARCH_SRCDIR)/arm -I$(TOPDIR)/sched
-endif
-
 ASRCS =
-AOBJS = $(ASRCS:.S=$(OBJEXT))
 CSRCS =
 
 ifeq ($(CONFIG_LCD_UG2864AMBAG01),y)
@@ -57,36 +46,4 @@ ifeq ($(CONFIG_LIB_BOARDCTL),y)
 CSRCS += lpc2148_appinit.c
 endif
 
-COBJS = $(CSRCS:.c=$(OBJEXT))
-
-SRCS = $(ASRCS) $(CSRCS)
-OBJS = $(AOBJS) $(COBJS)
-
-CFLAGS += -I $(TOPDIR)/arch/$(CONFIG_ARCH)/src
-
-all: libboard$(LIBEXT)
-
-$(AOBJS): %$(OBJEXT): %.S
-	$(call ASSEMBLE, $<, $@)
-
-$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
-	$(call COMPILE, $<, $@)
-
-libboard$(LIBEXT): $(OBJS)
-	$(call ARCHIVE, $@, $(OBJS))
-
-.depend: Makefile $(SRCS)
-	$(Q) $(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
-	$(Q) touch $@
-
-depend: .depend
-
-clean:
-	$(call DELFILE, libboard$(LIBEXT))
-	$(call CLEAN)
-
-distclean: clean
-	$(call DELFILE, Make.dep)
-	$(call DELFILE, .depend)
-
--include Make.dep
+include $(TOPDIR)/configs/Board.mk