diff --git a/arch/arm/src/Makefile b/arch/arm/src/Makefile
index 61c70659a4..5b159d388d 100644
--- a/arch/arm/src/Makefile
+++ b/arch/arm/src/Makefile
@@ -89,8 +89,15 @@ LDFLAGS += $(addprefix -T,$(call CONVERT_PATH,$(ARCHSCRIPT))) $(EXTRALINKCMDS)
 
 # Override in Make.defs if linker is not 'ld'
 
-LDSTARTGROUP ?= --start-group
-LDENDGROUP ?= --end-group
+ifeq ($(LD),$(CC))
+  LDSTARTGROUP ?= -Wl,--start-group
+  LDENDGROUP   ?= -Wl,--end-group
+  LDFLAGS      := $(addprefix -Xlinker ,$(LDFLAGS))
+  LDFLAGS      += $(CFLAGS)
+else
+  LDSTARTGROUP ?= --start-group
+  LDENDGROUP   ?= --end-group
+endif
 
 BOARDMAKE = $(if $(wildcard board$(DELIM)Makefile),y,)
 
diff --git a/arch/arm/src/arm/Toolchain.defs b/arch/arm/src/arm/Toolchain.defs
index 2c851b924f..b9d3025b5f 100644
--- a/arch/arm/src/arm/Toolchain.defs
+++ b/arch/arm/src/arm/Toolchain.defs
@@ -118,15 +118,29 @@ endif
 
 # Default toolchain
 
-CC = $(CROSSDEV)gcc
-CXX = $(CROSSDEV)g++
-CPP = $(CROSSDEV)gcc -E -P -x c
-LD = $(CROSSDEV)ld
-STRIP = $(CROSSDEV)strip --strip-unneeded
-AR = $(CROSSDEV)ar rcs
-NM = $(CROSSDEV)nm
+CC      = $(CROSSDEV)gcc
+CXX     = $(CROSSDEV)g++
+CPP     = $(CROSSDEV)gcc -E -P -x c
+STRIP   = $(CROSSDEV)strip --strip-unneeded
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
+LD      = $(CROSSDEV)ld
+AR      = $(CROSSDEV)ar rcs
+NM      = $(CROSSDEV)nm
+
+# Link Time Optimization
+
+ifeq ($(CONFIG_LTO_FULL),y)
+  MAXOPTIMIZATION += -flto
+  ifeq ($(CONFIG_ARM_TOOLCHAIN),GNU_EABI)
+    LD := $(CROSSDEV)gcc
+    AR := $(CROSSDEV)gcc-ar rcs
+    NM := $(CROSSDEV)gcc-nm
+    MAXOPTIMIZATION += -fuse-linker-plugin
+    MAXOPTIMIZATION += -fno-builtin
+    MAXOPTIMIZATION += -nodefaultlibs
+  endif
+endif
 
 # Add the builtin library
 
diff --git a/arch/arm/src/armv6-m/Toolchain.defs b/arch/arm/src/armv6-m/Toolchain.defs
index 4b8d2c7cab..63ef66ca76 100644
--- a/arch/arm/src/armv6-m/Toolchain.defs
+++ b/arch/arm/src/armv6-m/Toolchain.defs
@@ -86,6 +86,9 @@ ifeq ($(CONFIG_LTO_THIN),y)
   MAXOPTIMIZATION += -flto=thin
 else ifeq ($(CONFIG_LTO_FULL),y)
   MAXOPTIMIZATION += -flto
+  ifeq ($(CONFIG_ARMV6M_TOOLCHAIN),GNU_EABI)
+    MAXOPTIMIZATION += -fuse-linker-plugin
+  endif
 endif
 
 # NuttX buildroot under Linux or Cygwin
@@ -129,12 +132,22 @@ else
   CC      = $(CROSSDEV)gcc
   CXX     = $(CROSSDEV)g++
   CPP     = $(CROSSDEV)gcc -E -P -x c
-  LD      = $(CROSSDEV)ld
   STRIP   = $(CROSSDEV)strip --strip-unneeded
-  AR      = $(CROSSDEV)ar rcs
-  NM      = $(CROSSDEV)nm
   OBJCOPY = $(CROSSDEV)objcopy
   OBJDUMP = $(CROSSDEV)objdump
+  LD      = $(CROSSDEV)ld
+  AR      = $(CROSSDEV)ar rcs
+  NM      = $(CROSSDEV)nm
+
+  ifeq ($(CONFIG_LTO_FULL),y)
+    ifeq ($(CONFIG_ARMV6M_TOOLCHAIN),GNU_EABI)
+      LD := $(CROSSDEV)gcc
+      AR := $(CROSSDEV)gcc-ar rcs
+      NM := $(CROSSDEV)gcc-nm
+      MAXOPTIMIZATION += -fno-builtin
+      MAXOPTIMIZATION += -nodefaultlibs
+    endif
+  endif
 endif
 
 # Architecture flags
diff --git a/arch/arm/src/armv7-a/Toolchain.defs b/arch/arm/src/armv7-a/Toolchain.defs
index 454d71e1a2..b50ca4d873 100644
--- a/arch/arm/src/armv7-a/Toolchain.defs
+++ b/arch/arm/src/armv7-a/Toolchain.defs
@@ -165,15 +165,29 @@ endif
 
 # Default toolchain
 
-CC = $(CROSSDEV)gcc
-CXX = $(CROSSDEV)g++
-CPP = $(CROSSDEV)gcc -E -P -x c
-LD = $(CROSSDEV)ld
-STRIP = $(CROSSDEV)strip --strip-unneeded
-AR = $(CROSSDEV)ar rcs
-NM = $(CROSSDEV)nm
+CC      = $(CROSSDEV)gcc
+CXX     = $(CROSSDEV)g++
+CPP     = $(CROSSDEV)gcc -E -P -x c
+STRIP   = $(CROSSDEV)strip --strip-unneeded
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
+LD      = $(CROSSDEV)ld
+AR      = $(CROSSDEV)ar rcs
+NM      = $(CROSSDEV)nm
+
+# Link Time Optimization
+
+ifeq ($(CONFIG_LTO_FULL),y)
+  MAXOPTIMIZATION += -flto
+  ifeq ($(CONFIG_ARMV7A_TOOLCHAIN),GNU_EABI)
+    LD := $(CROSSDEV)gcc
+    AR := $(CROSSDEV)gcc-ar rcs
+    NM := $(CROSSDEV)gcc-nm
+    MAXOPTIMIZATION += -fuse-linker-plugin
+    MAXOPTIMIZATION += -fno-builtin
+    MAXOPTIMIZATION += -nodefaultlibs
+  endif
+endif
 
 # Add the builtin library
 
diff --git a/arch/arm/src/armv7-m/Toolchain.defs b/arch/arm/src/armv7-m/Toolchain.defs
index 396238e8bc..84c264f505 100644
--- a/arch/arm/src/armv7-m/Toolchain.defs
+++ b/arch/arm/src/armv7-m/Toolchain.defs
@@ -136,6 +136,9 @@ ifeq ($(CONFIG_LTO_THIN),y)
   MAXOPTIMIZATION += -flto=thin
 else ifeq ($(CONFIG_LTO_FULL),y)
   MAXOPTIMIZATION += -flto
+  ifeq ($(CONFIG_ARMV7M_TOOLCHAIN),GNU_EABI)
+    MAXOPTIMIZATION += -fuse-linker-plugin
+  endif
 endif
 
 # NuttX buildroot under Linux or Cygwin
@@ -188,12 +191,22 @@ else
   CC      = $(CROSSDEV)gcc
   CXX     = $(CROSSDEV)g++
   CPP     = $(CROSSDEV)gcc -E -P -x c
-  LD      = $(CROSSDEV)ld
   STRIP   = $(CROSSDEV)strip --strip-unneeded
-  AR      = $(CROSSDEV)ar rcs
-  NM      = $(CROSSDEV)nm
   OBJCOPY = $(CROSSDEV)objcopy
   OBJDUMP = $(CROSSDEV)objdump
+  LD      = $(CROSSDEV)ld
+  AR      = $(CROSSDEV)ar rcs
+  NM      = $(CROSSDEV)nm
+
+  ifeq ($(CONFIG_LTO_FULL),y)
+    ifeq ($(CONFIG_ARMV7M_TOOLCHAIN),GNU_EABI)
+      LD := $(CROSSDEV)gcc
+      AR := $(CROSSDEV)gcc-ar rcs
+      NM := $(CROSSDEV)gcc-nm
+      MAXOPTIMIZATION += -fno-builtin
+      MAXOPTIMIZATION += -nodefaultlibs
+    endif
+  endif
 endif
 
 # Architecture flags
diff --git a/arch/arm/src/armv7-r/Toolchain.defs b/arch/arm/src/armv7-r/Toolchain.defs
index 0a3c5038f7..c012e2e06f 100644
--- a/arch/arm/src/armv7-r/Toolchain.defs
+++ b/arch/arm/src/armv7-r/Toolchain.defs
@@ -141,15 +141,29 @@ endif
 
 # Default toolchain
 
-CC = $(CROSSDEV)gcc
-CXX = $(CROSSDEV)g++
-CPP = $(CROSSDEV)gcc -E -P -x c
-LD = $(CROSSDEV)ld
-STRIP = $(CROSSDEV)strip --strip-unneeded
-AR = $(CROSSDEV)ar rcs
-NM = $(CROSSDEV)nm
+CC      = $(CROSSDEV)gcc
+CXX     = $(CROSSDEV)g++
+CPP     = $(CROSSDEV)gcc -E -P -x c
+STRIP   = $(CROSSDEV)strip --strip-unneeded
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump
+LD      = $(CROSSDEV)ld
+AR      = $(CROSSDEV)ar rcs
+NM      = $(CROSSDEV)nm
+
+# Link Time Optimization
+
+ifeq ($(CONFIG_LTO_FULL),y)
+  MAXOPTIMIZATION += -flto
+  ifeq ($(CONFIG_ARMV7R_TOOLCHAIN),GNU_EABI)
+    LD := $(CROSSDEV)gcc
+    AR := $(CROSSDEV)gcc-ar rcs
+    NM := $(CROSSDEV)gcc-nm
+    MAXOPTIMIZATION += -fuse-linker-plugin
+    MAXOPTIMIZATION += -fno-builtin
+    MAXOPTIMIZATION += -nodefaultlibs
+  endif
+endif
 
 # Add the builtin library
 
diff --git a/arch/arm/src/armv8-m/Toolchain.defs b/arch/arm/src/armv8-m/Toolchain.defs
index 414358b033..43f707fcbe 100644
--- a/arch/arm/src/armv8-m/Toolchain.defs
+++ b/arch/arm/src/armv8-m/Toolchain.defs
@@ -145,6 +145,9 @@ ifeq ($(CONFIG_LTO_THIN),y)
   MAXOPTIMIZATION += -flto=thin
 else ifeq ($(CONFIG_LTO_FULL),y)
   MAXOPTIMIZATION += -flto
+  ifeq ($(CONFIG_ARMV8M_TOOLCHAIN),GNU_EABI)
+    MAXOPTIMIZATION += -fuse-linker-plugin
+  endif
 endif
 
 # NuttX buildroot under Linux or Cygwin
@@ -203,6 +206,16 @@ else
   NM      = $(CROSSDEV)nm
   OBJCOPY = $(CROSSDEV)objcopy
   OBJDUMP = $(CROSSDEV)objdump
+
+  ifeq ($(CONFIG_LTO_FULL),y)
+    ifeq ($(CONFIG_ARMV8M_TOOLCHAIN),GNU_EABI)
+      LD := $(CROSSDEV)gcc
+      AR := $(CROSSDEV)gcc-ar rcs
+      NM := $(CROSSDEV)gcc-nm
+      MAXOPTIMIZATION += -fno-builtin
+      MAXOPTIMIZATION += -nodefaultlibs
+    endif
+  endif
 endif
 
 # Architecture flags