diff --git a/configs/README.txt b/configs/README.txt
index c7f3db0e7b..4f96dc325b 100644
--- a/configs/README.txt
+++ b/configs/README.txt
@@ -171,7 +171,6 @@ defconfig -- This is a configuration file similar to the Linux
     CONFIG_RAW_BINARY - make a raw binary format file used with many
       different loaders using the GNU objcopy program.  This option
       should not be selected if you are not using the GNU toolchain.
-    CONFIG_HAVE_LIBM - toolchain supports libm.a
     CONFIG_HAVE_CXX - toolchain supports C++ and CXX, CXXFLAGS, and
       COMPILEXX have been defined in the configurations Make.defs
       file.
diff --git a/configs/amber/hello/defconfig b/configs/amber/hello/defconfig
index fece8db36b..2439279104 100644
--- a/configs/amber/hello/defconfig
+++ b/configs/amber/hello/defconfig
@@ -110,7 +110,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/avr32dev1/nsh/defconfig b/configs/avr32dev1/nsh/defconfig
index 7e75380c09..3ca2fac382 100755
--- a/configs/avr32dev1/nsh/defconfig
+++ b/configs/avr32dev1/nsh/defconfig
@@ -136,7 +136,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/avr32dev1/ostest/defconfig b/configs/avr32dev1/ostest/defconfig
index b70cbb6af4..ed7280dc60 100755
--- a/configs/avr32dev1/ostest/defconfig
+++ b/configs/avr32dev1/ostest/defconfig
@@ -136,7 +136,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/c5471evm/httpd/defconfig b/configs/c5471evm/httpd/defconfig
index 372fb330f7..52a0fc4bbe 100644
--- a/configs/c5471evm/httpd/defconfig
+++ b/configs/c5471evm/httpd/defconfig
@@ -86,7 +86,6 @@ CONFIG_NET_C5471_BASET10=n
 CONFIG_RRLOAD_BINARY=y
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/c5471evm/nettest/defconfig b/configs/c5471evm/nettest/defconfig
index 179b4c1854..6da9fa522f 100644
--- a/configs/c5471evm/nettest/defconfig
+++ b/configs/c5471evm/nettest/defconfig
@@ -57,7 +57,6 @@ CONFIG_DRAM_SIZE=285212672
 CONFIG_RRLOAD_BINARY=y
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # C5471 specific device driver settings
diff --git a/configs/c5471evm/nsh/defconfig b/configs/c5471evm/nsh/defconfig
index 5746f833a2..6b583d31a5 100644
--- a/configs/c5471evm/nsh/defconfig
+++ b/configs/c5471evm/nsh/defconfig
@@ -86,7 +86,6 @@ CONFIG_NET_C5471_BASET10=n
 CONFIG_RRLOAD_BINARY=y
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/c5471evm/ostest/defconfig b/configs/c5471evm/ostest/defconfig
index e0c6297c13..04ac9677f4 100644
--- a/configs/c5471evm/ostest/defconfig
+++ b/configs/c5471evm/ostest/defconfig
@@ -86,7 +86,6 @@ CONFIG_NET_C5471_BASET10=n
 CONFIG_RRLOAD_BINARY=y
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/compal_e88/nsh_highram/defconfig b/configs/compal_e88/nsh_highram/defconfig
index 3cf0af6295..b429af6966 100644
--- a/configs/compal_e88/nsh_highram/defconfig
+++ b/configs/compal_e88/nsh_highram/defconfig
@@ -88,7 +88,6 @@ CONFIG_NET_C5471_BASET10=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/compal_e99/nsh_compalram/defconfig b/configs/compal_e99/nsh_compalram/defconfig
index f9bf23af66..52f99bf124 100644
--- a/configs/compal_e99/nsh_compalram/defconfig
+++ b/configs/compal_e99/nsh_compalram/defconfig
@@ -91,7 +91,6 @@ CONFIG_NET_C5471_BASET10=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/compal_e99/nsh_highram/defconfig b/configs/compal_e99/nsh_highram/defconfig
index f5323c664c..b1539c98c9 100644
--- a/configs/compal_e99/nsh_highram/defconfig
+++ b/configs/compal_e99/nsh_highram/defconfig
@@ -91,7 +91,6 @@ CONFIG_NET_C5471_BASET10=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/demo9s12ne64/ostest/defconfig b/configs/demo9s12ne64/ostest/defconfig
index a45fc7e474..5033d82011 100755
--- a/configs/demo9s12ne64/ostest/defconfig
+++ b/configs/demo9s12ne64/ostest/defconfig
@@ -102,7 +102,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=y
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # Setup for a two-pass build
diff --git a/configs/ea3131/nsh/defconfig b/configs/ea3131/nsh/defconfig
index 38caf93aaf..c97f521a52 100644
--- a/configs/ea3131/nsh/defconfig
+++ b/configs/ea3131/nsh/defconfig
@@ -109,7 +109,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ea3131/ostest/defconfig b/configs/ea3131/ostest/defconfig
index abc2c8ba54..c66ee51a44 100644
--- a/configs/ea3131/ostest/defconfig
+++ b/configs/ea3131/ostest/defconfig
@@ -109,7 +109,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ea3131/pgnsh/defconfig b/configs/ea3131/pgnsh/defconfig
index f03432e8de..c9e0963580 100644
--- a/configs/ea3131/pgnsh/defconfig
+++ b/configs/ea3131/pgnsh/defconfig
@@ -114,7 +114,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # Setup for a two-pass build
diff --git a/configs/ea3131/usbserial/defconfig b/configs/ea3131/usbserial/defconfig
index 3314de254b..1e8f5cf945 100644
--- a/configs/ea3131/usbserial/defconfig
+++ b/configs/ea3131/usbserial/defconfig
@@ -109,7 +109,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ea3131/usbstorage/defconfig b/configs/ea3131/usbstorage/defconfig
index a857523df3..d8088b5dfa 100644
--- a/configs/ea3131/usbstorage/defconfig
+++ b/configs/ea3131/usbstorage/defconfig
@@ -109,7 +109,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ea3152/ostest/defconfig b/configs/ea3152/ostest/defconfig
index 5b7b5b59df..34cf49dfba 100644
--- a/configs/ea3152/ostest/defconfig
+++ b/configs/ea3152/ostest/defconfig
@@ -109,7 +109,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/eagle100/httpd/defconfig b/configs/eagle100/httpd/defconfig
index 7c47f44674..7916569bc0 100644
--- a/configs/eagle100/httpd/defconfig
+++ b/configs/eagle100/httpd/defconfig
@@ -115,7 +115,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/eagle100/nettest/defconfig b/configs/eagle100/nettest/defconfig
index 4f27210454..6f47953863 100644
--- a/configs/eagle100/nettest/defconfig
+++ b/configs/eagle100/nettest/defconfig
@@ -115,7 +115,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/eagle100/nsh/defconfig b/configs/eagle100/nsh/defconfig
index 4848e957bf..b50413db0e 100644
--- a/configs/eagle100/nsh/defconfig
+++ b/configs/eagle100/nsh/defconfig
@@ -115,7 +115,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/eagle100/nxflat/defconfig b/configs/eagle100/nxflat/defconfig
index 01931b0d3a..98029ddd83 100644
--- a/configs/eagle100/nxflat/defconfig
+++ b/configs/eagle100/nxflat/defconfig
@@ -115,7 +115,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/eagle100/ostest/defconfig b/configs/eagle100/ostest/defconfig
index 13a316ca44..f3634aa55f 100644
--- a/configs/eagle100/ostest/defconfig
+++ b/configs/eagle100/ostest/defconfig
@@ -115,7 +115,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/eagle100/thttpd/defconfig b/configs/eagle100/thttpd/defconfig
index 412a89e9cf..d68d51acfc 100644
--- a/configs/eagle100/thttpd/defconfig
+++ b/configs/eagle100/thttpd/defconfig
@@ -115,7 +115,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ekk-lm3s9b96/nsh/defconfig b/configs/ekk-lm3s9b96/nsh/defconfig
index 11407295fd..2a1a0552d2 100644
--- a/configs/ekk-lm3s9b96/nsh/defconfig
+++ b/configs/ekk-lm3s9b96/nsh/defconfig
@@ -132,7 +132,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ekk-lm3s9b96/ostest/defconfig b/configs/ekk-lm3s9b96/ostest/defconfig
index 734ad031e2..c465cb8b7c 100644
--- a/configs/ekk-lm3s9b96/ostest/defconfig
+++ b/configs/ekk-lm3s9b96/ostest/defconfig
@@ -132,7 +132,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ez80f910200kitg/ostest/defconfig b/configs/ez80f910200kitg/ostest/defconfig
index 22b6275429..9ceb261b22 100644
--- a/configs/ez80f910200kitg/ostest/defconfig
+++ b/configs/ez80f910200kitg/ostest/defconfig
@@ -94,7 +94,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ez80f910200zco/dhcpd/defconfig b/configs/ez80f910200zco/dhcpd/defconfig
index ea9844dc2e..a20e86a45a 100644
--- a/configs/ez80f910200zco/dhcpd/defconfig
+++ b/configs/ez80f910200zco/dhcpd/defconfig
@@ -97,7 +97,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ez80f910200zco/httpd/defconfig b/configs/ez80f910200zco/httpd/defconfig
index ddf34285ab..cccecf2bfc 100644
--- a/configs/ez80f910200zco/httpd/defconfig
+++ b/configs/ez80f910200zco/httpd/defconfig
@@ -97,7 +97,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ez80f910200zco/nettest/defconfig b/configs/ez80f910200zco/nettest/defconfig
index 7b1415bf4b..e018164b01 100644
--- a/configs/ez80f910200zco/nettest/defconfig
+++ b/configs/ez80f910200zco/nettest/defconfig
@@ -97,7 +97,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ez80f910200zco/nsh/defconfig b/configs/ez80f910200zco/nsh/defconfig
index fa701253d6..34fbe603d1 100644
--- a/configs/ez80f910200zco/nsh/defconfig
+++ b/configs/ez80f910200zco/nsh/defconfig
@@ -97,7 +97,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ez80f910200zco/ostest/defconfig b/configs/ez80f910200zco/ostest/defconfig
index f16ddee39f..1954b7a5d8 100644
--- a/configs/ez80f910200zco/ostest/defconfig
+++ b/configs/ez80f910200zco/ostest/defconfig
@@ -96,7 +96,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ez80f910200zco/poll/defconfig b/configs/ez80f910200zco/poll/defconfig
index 6ad505dc56..a98526466a 100644
--- a/configs/ez80f910200zco/poll/defconfig
+++ b/configs/ez80f910200zco/poll/defconfig
@@ -97,7 +97,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/fire-stm32v2/nsh/defconfig b/configs/fire-stm32v2/nsh/defconfig
index 5edde6ed12..f126c51fd6 100644
--- a/configs/fire-stm32v2/nsh/defconfig
+++ b/configs/fire-stm32v2/nsh/defconfig
@@ -509,7 +509,6 @@ CONFIG_STDIO_BUFFER_SIZE=256
 CONFIG_STDIO_LINEBUFFER=y
 CONFIG_NUNGET_CHARS=2
 CONFIG_LIB_HOMEDIR="/"
-# CONFIG_HAVE_LIBM is not set
 # CONFIG_NOPRINTF_FIELDWIDTH is not set
 # CONFIG_LIBC_FLOATINGPOINT is not set
 # CONFIG_EOL_IS_CR is not set
diff --git a/configs/hymini-stm32v/buttons/defconfig b/configs/hymini-stm32v/buttons/defconfig
index 44dcf3c41a..8ee2c1d763 100644
--- a/configs/hymini-stm32v/buttons/defconfig
+++ b/configs/hymini-stm32v/buttons/defconfig
@@ -162,7 +162,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/hymini-stm32v/nsh/defconfig b/configs/hymini-stm32v/nsh/defconfig
index 52da9f6f62..f18194bce5 100755
--- a/configs/hymini-stm32v/nsh/defconfig
+++ b/configs/hymini-stm32v/nsh/defconfig
@@ -160,7 +160,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/hymini-stm32v/nsh2/defconfig b/configs/hymini-stm32v/nsh2/defconfig
index fbd9d23b36..b11895c9b1 100644
--- a/configs/hymini-stm32v/nsh2/defconfig
+++ b/configs/hymini-stm32v/nsh2/defconfig
@@ -165,7 +165,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 CONFIG_RTC=y
 
diff --git a/configs/hymini-stm32v/nx/defconfig b/configs/hymini-stm32v/nx/defconfig
index e411baf835..b46c68e293 100644
--- a/configs/hymini-stm32v/nx/defconfig
+++ b/configs/hymini-stm32v/nx/defconfig
@@ -160,7 +160,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/hymini-stm32v/nxlines/defconfig b/configs/hymini-stm32v/nxlines/defconfig
index 689b17376a..863e7a327d 100644
--- a/configs/hymini-stm32v/nxlines/defconfig
+++ b/configs/hymini-stm32v/nxlines/defconfig
@@ -164,7 +164,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/hymini-stm32v/usbserial/defconfig b/configs/hymini-stm32v/usbserial/defconfig
index 7883db8273..a6ed06dee9 100755
--- a/configs/hymini-stm32v/usbserial/defconfig
+++ b/configs/hymini-stm32v/usbserial/defconfig
@@ -162,7 +162,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/hymini-stm32v/usbstorage/defconfig b/configs/hymini-stm32v/usbstorage/defconfig
index c3434e3a46..7d75577fe5 100755
--- a/configs/hymini-stm32v/usbstorage/defconfig
+++ b/configs/hymini-stm32v/usbstorage/defconfig
@@ -161,7 +161,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/kwikstik-k40/ostest/defconfig b/configs/kwikstik-k40/ostest/defconfig
index 2cf29894b2..a811ee0632 100755
--- a/configs/kwikstik-k40/ostest/defconfig
+++ b/configs/kwikstik-k40/ostest/defconfig
@@ -172,7 +172,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lincoln60/nsh/defconfig b/configs/lincoln60/nsh/defconfig
index 43944f0a68..bb08a7deca 100644
--- a/configs/lincoln60/nsh/defconfig
+++ b/configs/lincoln60/nsh/defconfig
@@ -149,7 +149,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lincoln60/ostest/defconfig b/configs/lincoln60/ostest/defconfig
index 6dd51eb07d..0576d018fa 100644
--- a/configs/lincoln60/ostest/defconfig
+++ b/configs/lincoln60/ostest/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lm3s6432-s2e/nsh/defconfig b/configs/lm3s6432-s2e/nsh/defconfig
index f0cf503efb..d203b29546 100644
--- a/configs/lm3s6432-s2e/nsh/defconfig
+++ b/configs/lm3s6432-s2e/nsh/defconfig
@@ -131,7 +131,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lm3s6432-s2e/ostest/defconfig b/configs/lm3s6432-s2e/ostest/defconfig
index daeac0177d..02b7dbd314 100644
--- a/configs/lm3s6432-s2e/ostest/defconfig
+++ b/configs/lm3s6432-s2e/ostest/defconfig
@@ -131,7 +131,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lm3s6965-ek/nsh/defconfig b/configs/lm3s6965-ek/nsh/defconfig
index 2771a3dc93..5afac6e6fb 100755
--- a/configs/lm3s6965-ek/nsh/defconfig
+++ b/configs/lm3s6965-ek/nsh/defconfig
@@ -132,7 +132,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lm3s6965-ek/nx/defconfig b/configs/lm3s6965-ek/nx/defconfig
index 83b338161c..b6cb0cad5a 100755
--- a/configs/lm3s6965-ek/nx/defconfig
+++ b/configs/lm3s6965-ek/nx/defconfig
@@ -132,7 +132,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General SPI interface configuration
diff --git a/configs/lm3s6965-ek/ostest/defconfig b/configs/lm3s6965-ek/ostest/defconfig
index 0bfe9ef720..da35e55314 100755
--- a/configs/lm3s6965-ek/ostest/defconfig
+++ b/configs/lm3s6965-ek/ostest/defconfig
@@ -132,7 +132,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lm3s8962-ek/nsh/defconfig b/configs/lm3s8962-ek/nsh/defconfig
index 001a873874..2a80e84e70 100755
--- a/configs/lm3s8962-ek/nsh/defconfig
+++ b/configs/lm3s8962-ek/nsh/defconfig
@@ -131,7 +131,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lm3s8962-ek/nx/defconfig b/configs/lm3s8962-ek/nx/defconfig
index dbae4b2aa7..51063f7558 100755
--- a/configs/lm3s8962-ek/nx/defconfig
+++ b/configs/lm3s8962-ek/nx/defconfig
@@ -131,7 +131,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General SPI interface configuration
diff --git a/configs/lm3s8962-ek/ostest/defconfig b/configs/lm3s8962-ek/ostest/defconfig
index aeb0a1ecf8..c540b1d7f6 100755
--- a/configs/lm3s8962-ek/ostest/defconfig
+++ b/configs/lm3s8962-ek/ostest/defconfig
@@ -131,7 +131,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lpc4330-xplorer/nsh/defconfig b/configs/lpc4330-xplorer/nsh/defconfig
index e4269ea67d..a97b9f789e 100644
--- a/configs/lpc4330-xplorer/nsh/defconfig
+++ b/configs/lpc4330-xplorer/nsh/defconfig
@@ -191,7 +191,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lpc4330-xplorer/ostest/defconfig b/configs/lpc4330-xplorer/ostest/defconfig
index d5ac58ef17..cddf7d0e8f 100644
--- a/configs/lpc4330-xplorer/ostest/defconfig
+++ b/configs/lpc4330-xplorer/ostest/defconfig
@@ -189,7 +189,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lpcxpresso-lpc1768/dhcpd/defconfig b/configs/lpcxpresso-lpc1768/dhcpd/defconfig
index 01c54fa9fe..92aa13f7b0 100755
--- a/configs/lpcxpresso-lpc1768/dhcpd/defconfig
+++ b/configs/lpcxpresso-lpc1768/dhcpd/defconfig
@@ -154,7 +154,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lpcxpresso-lpc1768/nsh/defconfig b/configs/lpcxpresso-lpc1768/nsh/defconfig
index 6d0be84007..0e149e1864 100755
--- a/configs/lpcxpresso-lpc1768/nsh/defconfig
+++ b/configs/lpcxpresso-lpc1768/nsh/defconfig
@@ -157,7 +157,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lpcxpresso-lpc1768/nx/defconfig b/configs/lpcxpresso-lpc1768/nx/defconfig
index a94571a835..88a2cd7a22 100755
--- a/configs/lpcxpresso-lpc1768/nx/defconfig
+++ b/configs/lpcxpresso-lpc1768/nx/defconfig
@@ -153,7 +153,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General SPI interface configuration
diff --git a/configs/lpcxpresso-lpc1768/ostest/defconfig b/configs/lpcxpresso-lpc1768/ostest/defconfig
index f58c78773e..1fa3e79bce 100755
--- a/configs/lpcxpresso-lpc1768/ostest/defconfig
+++ b/configs/lpcxpresso-lpc1768/ostest/defconfig
@@ -153,7 +153,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lpcxpresso-lpc1768/thttpd/defconfig b/configs/lpcxpresso-lpc1768/thttpd/defconfig
index 08d251d431..3d014d2914 100755
--- a/configs/lpcxpresso-lpc1768/thttpd/defconfig
+++ b/configs/lpcxpresso-lpc1768/thttpd/defconfig
@@ -154,7 +154,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/lpcxpresso-lpc1768/usbstorage/defconfig b/configs/lpcxpresso-lpc1768/usbstorage/defconfig
index 08f4ad1cfa..8e51d52057 100755
--- a/configs/lpcxpresso-lpc1768/usbstorage/defconfig
+++ b/configs/lpcxpresso-lpc1768/usbstorage/defconfig
@@ -153,7 +153,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/m68332evb/defconfig b/configs/m68332evb/defconfig
index e3e8110a7d..39b3c77324 100644
--- a/configs/m68332evb/defconfig
+++ b/configs/m68332evb/defconfig
@@ -67,7 +67,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mbed/hidkbd/defconfig b/configs/mbed/hidkbd/defconfig
index 3ec6912765..3c31b2f926 100644
--- a/configs/mbed/hidkbd/defconfig
+++ b/configs/mbed/hidkbd/defconfig
@@ -153,7 +153,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mbed/nsh/defconfig b/configs/mbed/nsh/defconfig
index dba89ec7b7..fca08b577b 100755
--- a/configs/mbed/nsh/defconfig
+++ b/configs/mbed/nsh/defconfig
@@ -149,7 +149,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mcu123-lpc214x/composite/defconfig b/configs/mcu123-lpc214x/composite/defconfig
index 6a6e5819cf..0599fed14f 100644
--- a/configs/mcu123-lpc214x/composite/defconfig
+++ b/configs/mcu123-lpc214x/composite/defconfig
@@ -90,7 +90,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mcu123-lpc214x/nsh/defconfig b/configs/mcu123-lpc214x/nsh/defconfig
index 7a514163c3..e2d37a938c 100644
--- a/configs/mcu123-lpc214x/nsh/defconfig
+++ b/configs/mcu123-lpc214x/nsh/defconfig
@@ -90,7 +90,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mcu123-lpc214x/ostest/defconfig b/configs/mcu123-lpc214x/ostest/defconfig
index 724459e806..5fc7df5c75 100644
--- a/configs/mcu123-lpc214x/ostest/defconfig
+++ b/configs/mcu123-lpc214x/ostest/defconfig
@@ -90,7 +90,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mcu123-lpc214x/usbserial/defconfig b/configs/mcu123-lpc214x/usbserial/defconfig
index c746c5732b..c35d804868 100644
--- a/configs/mcu123-lpc214x/usbserial/defconfig
+++ b/configs/mcu123-lpc214x/usbserial/defconfig
@@ -90,7 +90,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mcu123-lpc214x/usbstorage/defconfig b/configs/mcu123-lpc214x/usbstorage/defconfig
index d46ab7c3c5..a25f2e170b 100644
--- a/configs/mcu123-lpc214x/usbstorage/defconfig
+++ b/configs/mcu123-lpc214x/usbstorage/defconfig
@@ -90,7 +90,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/micropendous3/hello/defconfig b/configs/micropendous3/hello/defconfig
index 4e0ea0e997..63a8f249c8 100644
--- a/configs/micropendous3/hello/defconfig
+++ b/configs/micropendous3/hello/defconfig
@@ -105,7 +105,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mirtoo/nsh/defconfig b/configs/mirtoo/nsh/defconfig
index 4e3cb684e6..0883cc9ea0 100644
--- a/configs/mirtoo/nsh/defconfig
+++ b/configs/mirtoo/nsh/defconfig
@@ -163,7 +163,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mirtoo/nxffs/defconfig b/configs/mirtoo/nxffs/defconfig
index 31e3ef89b1..f2f5286e65 100644
--- a/configs/mirtoo/nxffs/defconfig
+++ b/configs/mirtoo/nxffs/defconfig
@@ -163,7 +163,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mirtoo/ostest/defconfig b/configs/mirtoo/ostest/defconfig
index a3af96fbcf..77b3e38b83 100644
--- a/configs/mirtoo/ostest/defconfig
+++ b/configs/mirtoo/ostest/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/mx1ads/ostest/defconfig b/configs/mx1ads/ostest/defconfig
index 9e425975df..55b3c72b8c 100644
--- a/configs/mx1ads/ostest/defconfig
+++ b/configs/mx1ads/ostest/defconfig
@@ -96,7 +96,6 @@ CONFIG_SPI2_DISABLE=y
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ne64badge/ostest/defconfig b/configs/ne64badge/ostest/defconfig
index ee36399f15..c101aa01b0 100755
--- a/configs/ne64badge/ostest/defconfig
+++ b/configs/ne64badge/ostest/defconfig
@@ -108,7 +108,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=y
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # Setup for a two-pass build
diff --git a/configs/ntosd-dm320/nettest/defconfig b/configs/ntosd-dm320/nettest/defconfig
index 1786380545..297df2173f 100644
--- a/configs/ntosd-dm320/nettest/defconfig
+++ b/configs/ntosd-dm320/nettest/defconfig
@@ -88,7 +88,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ntosd-dm320/nsh/defconfig b/configs/ntosd-dm320/nsh/defconfig
index 33cf33c24c..2b02c2d4e4 100644
--- a/configs/ntosd-dm320/nsh/defconfig
+++ b/configs/ntosd-dm320/nsh/defconfig
@@ -87,7 +87,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ntosd-dm320/ostest/defconfig b/configs/ntosd-dm320/ostest/defconfig
index 52ebe0bd9b..a9fca828af 100644
--- a/configs/ntosd-dm320/ostest/defconfig
+++ b/configs/ntosd-dm320/ostest/defconfig
@@ -88,7 +88,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ntosd-dm320/poll/defconfig b/configs/ntosd-dm320/poll/defconfig
index f27dcc2c32..08f75e6b6a 100644
--- a/configs/ntosd-dm320/poll/defconfig
+++ b/configs/ntosd-dm320/poll/defconfig
@@ -88,7 +88,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ntosd-dm320/thttpd/defconfig b/configs/ntosd-dm320/thttpd/defconfig
index becec2ef17..d2de4c167d 100644
--- a/configs/ntosd-dm320/thttpd/defconfig
+++ b/configs/ntosd-dm320/thttpd/defconfig
@@ -89,7 +89,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ntosd-dm320/udp/defconfig b/configs/ntosd-dm320/udp/defconfig
index 869f2e442e..de3b240560 100644
--- a/configs/ntosd-dm320/udp/defconfig
+++ b/configs/ntosd-dm320/udp/defconfig
@@ -88,7 +88,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ntosd-dm320/uip/defconfig b/configs/ntosd-dm320/uip/defconfig
index 19ffe452a9..281a63bd0c 100644
--- a/configs/ntosd-dm320/uip/defconfig
+++ b/configs/ntosd-dm320/uip/defconfig
@@ -88,7 +88,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/nucleus2g/nsh/defconfig b/configs/nucleus2g/nsh/defconfig
index 080c487705..5bc94e607e 100755
--- a/configs/nucleus2g/nsh/defconfig
+++ b/configs/nucleus2g/nsh/defconfig
@@ -149,7 +149,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/nucleus2g/ostest/defconfig b/configs/nucleus2g/ostest/defconfig
index 02eb316339..945e82a057 100755
--- a/configs/nucleus2g/ostest/defconfig
+++ b/configs/nucleus2g/ostest/defconfig
@@ -149,7 +149,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/nucleus2g/usbserial/defconfig b/configs/nucleus2g/usbserial/defconfig
index 300d30ab31..25804407f3 100755
--- a/configs/nucleus2g/usbserial/defconfig
+++ b/configs/nucleus2g/usbserial/defconfig
@@ -149,7 +149,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/nucleus2g/usbstorage/defconfig b/configs/nucleus2g/usbstorage/defconfig
index 7887818fbc..cc677b9f44 100755
--- a/configs/nucleus2g/usbstorage/defconfig
+++ b/configs/nucleus2g/usbstorage/defconfig
@@ -149,7 +149,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/ftpc/defconfig b/configs/olimex-lpc1766stk/ftpc/defconfig
index 6d1375e92c..7cf2e0e880 100755
--- a/configs/olimex-lpc1766stk/ftpc/defconfig
+++ b/configs/olimex-lpc1766stk/ftpc/defconfig
@@ -159,7 +159,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/hidkbd/defconfig b/configs/olimex-lpc1766stk/hidkbd/defconfig
index 7c9fe4c4e5..ac94ecfb86 100755
--- a/configs/olimex-lpc1766stk/hidkbd/defconfig
+++ b/configs/olimex-lpc1766stk/hidkbd/defconfig
@@ -159,7 +159,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/nettest/defconfig b/configs/olimex-lpc1766stk/nettest/defconfig
index 628ff01124..7e662fb97a 100755
--- a/configs/olimex-lpc1766stk/nettest/defconfig
+++ b/configs/olimex-lpc1766stk/nettest/defconfig
@@ -159,7 +159,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/nsh/defconfig b/configs/olimex-lpc1766stk/nsh/defconfig
index d5333a9f33..b12dd731a9 100755
--- a/configs/olimex-lpc1766stk/nsh/defconfig
+++ b/configs/olimex-lpc1766stk/nsh/defconfig
@@ -159,7 +159,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/nx/defconfig b/configs/olimex-lpc1766stk/nx/defconfig
index d86b8b83fd..0235c29b5f 100755
--- a/configs/olimex-lpc1766stk/nx/defconfig
+++ b/configs/olimex-lpc1766stk/nx/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General SPI interface configuration
diff --git a/configs/olimex-lpc1766stk/ostest/defconfig b/configs/olimex-lpc1766stk/ostest/defconfig
index a11c022764..fcc2bba448 100755
--- a/configs/olimex-lpc1766stk/ostest/defconfig
+++ b/configs/olimex-lpc1766stk/ostest/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/slip-httpd/defconfig b/configs/olimex-lpc1766stk/slip-httpd/defconfig
index 32092d216f..94d5da763f 100755
--- a/configs/olimex-lpc1766stk/slip-httpd/defconfig
+++ b/configs/olimex-lpc1766stk/slip-httpd/defconfig
@@ -158,7 +158,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/thttpd/defconfig b/configs/olimex-lpc1766stk/thttpd/defconfig
index 94ac19f42e..c14e1362b6 100755
--- a/configs/olimex-lpc1766stk/thttpd/defconfig
+++ b/configs/olimex-lpc1766stk/thttpd/defconfig
@@ -156,7 +156,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/usbserial/defconfig b/configs/olimex-lpc1766stk/usbserial/defconfig
index 2bd892cc30..e1216d8968 100755
--- a/configs/olimex-lpc1766stk/usbserial/defconfig
+++ b/configs/olimex-lpc1766stk/usbserial/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/usbstorage/defconfig b/configs/olimex-lpc1766stk/usbstorage/defconfig
index 8b55cc94d8..2f91efe474 100755
--- a/configs/olimex-lpc1766stk/usbstorage/defconfig
+++ b/configs/olimex-lpc1766stk/usbstorage/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc1766stk/wlan/defconfig b/configs/olimex-lpc1766stk/wlan/defconfig
index 4d73807e0c..aa896c30ce 100755
--- a/configs/olimex-lpc1766stk/wlan/defconfig
+++ b/configs/olimex-lpc1766stk/wlan/defconfig
@@ -150,7 +150,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc2378/nsh/defconfig b/configs/olimex-lpc2378/nsh/defconfig
index 7311d0c20f..30801a6ab4 100755
--- a/configs/olimex-lpc2378/nsh/defconfig
+++ b/configs/olimex-lpc2378/nsh/defconfig
@@ -110,7 +110,6 @@ CONFIG_UART2_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-lpc2378/ostest/defconfig b/configs/olimex-lpc2378/ostest/defconfig
index b96aadd87f..129bb7fbe5 100755
--- a/configs/olimex-lpc2378/ostest/defconfig
+++ b/configs/olimex-lpc2378/ostest/defconfig
@@ -110,7 +110,6 @@ CONFIG_UART2_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-stm32-p107/nsh/defconfig b/configs/olimex-stm32-p107/nsh/defconfig
index 67a153f9a2..9b9a72dcdb 100644
--- a/configs/olimex-stm32-p107/nsh/defconfig
+++ b/configs/olimex-stm32-p107/nsh/defconfig
@@ -198,7 +198,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-stm32-p107/ostest/defconfig b/configs/olimex-stm32-p107/ostest/defconfig
index 26a8470d26..21aa07875a 100644
--- a/configs/olimex-stm32-p107/ostest/defconfig
+++ b/configs/olimex-stm32-p107/ostest/defconfig
@@ -208,7 +208,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-strp711/nettest/defconfig b/configs/olimex-strp711/nettest/defconfig
index c401fe8c69..eb8c911088 100755
--- a/configs/olimex-strp711/nettest/defconfig
+++ b/configs/olimex-strp711/nettest/defconfig
@@ -128,7 +128,6 @@ CONFIG_UART3_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-strp711/nsh/defconfig b/configs/olimex-strp711/nsh/defconfig
index 985e3690ee..2deb556408 100644
--- a/configs/olimex-strp711/nsh/defconfig
+++ b/configs/olimex-strp711/nsh/defconfig
@@ -128,7 +128,6 @@ CONFIG_UART3_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/olimex-strp711/ostest/defconfig b/configs/olimex-strp711/ostest/defconfig
index cdac22b9f6..e60b7349f1 100644
--- a/configs/olimex-strp711/ostest/defconfig
+++ b/configs/olimex-strp711/ostest/defconfig
@@ -128,7 +128,6 @@ CONFIG_UART3_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/pcblogic-pic32mx/nsh/defconfig b/configs/pcblogic-pic32mx/nsh/defconfig
index 1e439e4667..3a480d7865 100644
--- a/configs/pcblogic-pic32mx/nsh/defconfig
+++ b/configs/pcblogic-pic32mx/nsh/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/pcblogic-pic32mx/ostest/defconfig b/configs/pcblogic-pic32mx/ostest/defconfig
index 868ba46695..da8ff40edb 100644
--- a/configs/pcblogic-pic32mx/ostest/defconfig
+++ b/configs/pcblogic-pic32mx/ostest/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/pic32-starterkit/nsh/defconfig b/configs/pic32-starterkit/nsh/defconfig
index 17cb151a76..17fbd6f4ec 100644
--- a/configs/pic32-starterkit/nsh/defconfig
+++ b/configs/pic32-starterkit/nsh/defconfig
@@ -215,7 +215,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/pic32-starterkit/nsh2/defconfig b/configs/pic32-starterkit/nsh2/defconfig
index c751591b21..0eec631180 100644
--- a/configs/pic32-starterkit/nsh2/defconfig
+++ b/configs/pic32-starterkit/nsh2/defconfig
@@ -215,7 +215,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/pic32-starterkit/ostest/defconfig b/configs/pic32-starterkit/ostest/defconfig
index c8e32419ea..e386b59360 100644
--- a/configs/pic32-starterkit/ostest/defconfig
+++ b/configs/pic32-starterkit/ostest/defconfig
@@ -215,7 +215,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/pic32mx7mmb/nsh/defconfig b/configs/pic32mx7mmb/nsh/defconfig
index 0523636563..c55e802093 100644
--- a/configs/pic32mx7mmb/nsh/defconfig
+++ b/configs/pic32mx7mmb/nsh/defconfig
@@ -215,7 +215,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/pic32mx7mmb/ostest/defconfig b/configs/pic32mx7mmb/ostest/defconfig
index 851f6022f2..a2e653a563 100644
--- a/configs/pic32mx7mmb/ostest/defconfig
+++ b/configs/pic32mx7mmb/ostest/defconfig
@@ -215,7 +215,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/pjrc-8051/defconfig b/configs/pjrc-8051/defconfig
index 0232376cf2..c223f64e18 100644
--- a/configs/pjrc-8051/defconfig
+++ b/configs/pjrc-8051/defconfig
@@ -66,7 +66,6 @@ CONFIG_LED_DEBUG=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/qemu-i486/nsh/defconfig b/configs/qemu-i486/nsh/defconfig
index 9085eb5fa4..b693c94f76 100644
--- a/configs/qemu-i486/nsh/defconfig
+++ b/configs/qemu-i486/nsh/defconfig
@@ -195,7 +195,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/qemu-i486/ostest/defconfig b/configs/qemu-i486/ostest/defconfig
index a9867fdc98..63c27a2317 100644
--- a/configs/qemu-i486/ostest/defconfig
+++ b/configs/qemu-i486/ostest/defconfig
@@ -127,7 +127,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/rgmp/arm/default/defconfig b/configs/rgmp/arm/default/defconfig
index 186c687248..a78500bf4c 100644
--- a/configs/rgmp/arm/default/defconfig
+++ b/configs/rgmp/arm/default/defconfig
@@ -124,7 +124,6 @@ CONFIG_ARCH_STDBOOL_H=y
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/rgmp/arm/nsh/defconfig b/configs/rgmp/arm/nsh/defconfig
index 8fbbc7b8b4..bee14b0a2a 100644
--- a/configs/rgmp/arm/nsh/defconfig
+++ b/configs/rgmp/arm/nsh/defconfig
@@ -124,7 +124,6 @@ CONFIG_ARCH_STDBOOL_H=y
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/rgmp/x86/default/defconfig b/configs/rgmp/x86/default/defconfig
index 9b4b58d89c..e36c397661 100644
--- a/configs/rgmp/x86/default/defconfig
+++ b/configs/rgmp/x86/default/defconfig
@@ -124,7 +124,6 @@ CONFIG_ARCH_STDBOOL_H=y
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/rgmp/x86/nsh/defconfig b/configs/rgmp/x86/nsh/defconfig
index 7af320ff72..6afe9c9a9e 100644
--- a/configs/rgmp/x86/nsh/defconfig
+++ b/configs/rgmp/x86/nsh/defconfig
@@ -124,7 +124,6 @@ CONFIG_ARCH_STDBOOL_H=y
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sam3u-ek/knsh/defconfig b/configs/sam3u-ek/knsh/defconfig
index 9aba512edf..416ca3fa3a 100755
--- a/configs/sam3u-ek/knsh/defconfig
+++ b/configs/sam3u-ek/knsh/defconfig
@@ -144,7 +144,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # Setup for a two-pass build
diff --git a/configs/sam3u-ek/nsh/defconfig b/configs/sam3u-ek/nsh/defconfig
index 02b9804183..69a2081ff2 100755
--- a/configs/sam3u-ek/nsh/defconfig
+++ b/configs/sam3u-ek/nsh/defconfig
@@ -139,7 +139,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/sam3u-ek/nx/defconfig b/configs/sam3u-ek/nx/defconfig
index 82e9e3cbc4..aae6aa5fa1 100755
--- a/configs/sam3u-ek/nx/defconfig
+++ b/configs/sam3u-ek/nx/defconfig
@@ -139,7 +139,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/sam3u-ek/ostest/defconfig b/configs/sam3u-ek/ostest/defconfig
index da582acb65..14b8eaa6ee 100755
--- a/configs/sam3u-ek/ostest/defconfig
+++ b/configs/sam3u-ek/ostest/defconfig
@@ -140,7 +140,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/sam3u-ek/touchscreen/defconfig b/configs/sam3u-ek/touchscreen/defconfig
index f3ced72cc4..cd1fec7d1d 100755
--- a/configs/sam3u-ek/touchscreen/defconfig
+++ b/configs/sam3u-ek/touchscreen/defconfig
@@ -146,7 +146,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/shenzhou/nsh/defconfig b/configs/shenzhou/nsh/defconfig
index fdc065c48e..b37da788e3 100644
--- a/configs/shenzhou/nsh/defconfig
+++ b/configs/shenzhou/nsh/defconfig
@@ -452,7 +452,6 @@ CONFIG_STDIO_BUFFER_SIZE=256
 CONFIG_STDIO_LINEBUFFER=y
 CONFIG_NUNGET_CHARS=2
 CONFIG_LIB_HOMEDIR="/"
-# CONFIG_HAVE_LIBM is not set
 # CONFIG_NOPRINTF_FIELDWIDTH is not set
 # CONFIG_LIBC_FLOATINGPOINT is not set
 # CONFIG_EOL_IS_CR is not set
diff --git a/configs/shenzhou/nxwm/defconfig b/configs/shenzhou/nxwm/defconfig
index e4316d1fe7..a5ccc8bfbe 100644
--- a/configs/shenzhou/nxwm/defconfig
+++ b/configs/shenzhou/nxwm/defconfig
@@ -552,7 +552,6 @@ CONFIG_STDIO_BUFFER_SIZE=64
 CONFIG_STDIO_LINEBUFFER=y
 CONFIG_NUNGET_CHARS=2
 CONFIG_LIB_HOMEDIR="/"
-# CONFIG_HAVE_LIBM is not set
 # CONFIG_NOPRINTF_FIELDWIDTH is not set
 # CONFIG_LIBC_FLOATINGPOINT is not set
 # CONFIG_EOL_IS_CR is not set
diff --git a/configs/shenzhou/thttpd/defconfig b/configs/shenzhou/thttpd/defconfig
index 5fd158cc64..82884f4c3f 100644
--- a/configs/shenzhou/thttpd/defconfig
+++ b/configs/shenzhou/thttpd/defconfig
@@ -452,7 +452,6 @@ CONFIG_STDIO_BUFFER_SIZE=256
 CONFIG_STDIO_LINEBUFFER=y
 CONFIG_NUNGET_CHARS=2
 CONFIG_LIB_HOMEDIR="/"
-# CONFIG_HAVE_LIBM is not set
 # CONFIG_NOPRINTF_FIELDWIDTH is not set
 # CONFIG_LIBC_FLOATINGPOINT is not set
 # CONFIG_EOL_IS_CR is not set
diff --git a/configs/sim/mount/defconfig b/configs/sim/mount/defconfig
index b980b38dda..7caa878525 100644
--- a/configs/sim/mount/defconfig
+++ b/configs/sim/mount/defconfig
@@ -118,7 +118,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/nettest/defconfig b/configs/sim/nettest/defconfig
index d724046409..c216e2edc8 100644
--- a/configs/sim/nettest/defconfig
+++ b/configs/sim/nettest/defconfig
@@ -118,7 +118,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/nsh/defconfig b/configs/sim/nsh/defconfig
index cd1fc8c7b3..a217dd71d7 100644
--- a/configs/sim/nsh/defconfig
+++ b/configs/sim/nsh/defconfig
@@ -143,7 +143,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/nsh2/defconfig b/configs/sim/nsh2/defconfig
index 787e388c7d..0e93cd4810 100644
--- a/configs/sim/nsh2/defconfig
+++ b/configs/sim/nsh2/defconfig
@@ -153,7 +153,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/nx/defconfig b/configs/sim/nx/defconfig
index 5b48d72a71..d5cad6741b 100644
--- a/configs/sim/nx/defconfig
+++ b/configs/sim/nx/defconfig
@@ -129,7 +129,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/nx11/defconfig b/configs/sim/nx11/defconfig
index 43d57bd50a..0ac3362be2 100644
--- a/configs/sim/nx11/defconfig
+++ b/configs/sim/nx11/defconfig
@@ -136,7 +136,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/nxffs/defconfig b/configs/sim/nxffs/defconfig
index c30227bd84..79f5b0f93a 100644
--- a/configs/sim/nxffs/defconfig
+++ b/configs/sim/nxffs/defconfig
@@ -119,7 +119,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/nxwm/defconfig b/configs/sim/nxwm/defconfig
index d34202e05c..9029b3b2f1 100644
--- a/configs/sim/nxwm/defconfig
+++ b/configs/sim/nxwm/defconfig
@@ -153,7 +153,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/ostest/defconfig b/configs/sim/ostest/defconfig
index 0d3669a25b..a2fbd9f050 100644
--- a/configs/sim/ostest/defconfig
+++ b/configs/sim/ostest/defconfig
@@ -118,7 +118,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/pashello/defconfig b/configs/sim/pashello/defconfig
index e3cf3a7b5b..b40ec626ec 100644
--- a/configs/sim/pashello/defconfig
+++ b/configs/sim/pashello/defconfig
@@ -118,7 +118,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/sim/touchscreen/defconfig b/configs/sim/touchscreen/defconfig
index b112449b39..6a2e3e304d 100644
--- a/configs/sim/touchscreen/defconfig
+++ b/configs/sim/touchscreen/defconfig
@@ -135,7 +135,6 @@ CONFIG_ARCH_BZERO=n
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=y
 
 #
 # Sizes of configurable things (0 disables)
diff --git a/configs/skp16c26/ostest/defconfig b/configs/skp16c26/ostest/defconfig
index 8cb2eb4691..f3370d48cb 100644
--- a/configs/skp16c26/ostest/defconfig
+++ b/configs/skp16c26/ostest/defconfig
@@ -93,7 +93,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=y
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/RIDE/defconfig b/configs/stm3210e-eval/RIDE/defconfig
index f4593d5ea0..7032bd975b 100755
--- a/configs/stm3210e-eval/RIDE/defconfig
+++ b/configs/stm3210e-eval/RIDE/defconfig
@@ -165,7 +165,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/buttons/defconfig b/configs/stm3210e-eval/buttons/defconfig
index ac3f108874..37b1cf968c 100644
--- a/configs/stm3210e-eval/buttons/defconfig
+++ b/configs/stm3210e-eval/buttons/defconfig
@@ -176,7 +176,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/composite/defconfig b/configs/stm3210e-eval/composite/defconfig
index 18c2164d36..fa485f4df5 100755
--- a/configs/stm3210e-eval/composite/defconfig
+++ b/configs/stm3210e-eval/composite/defconfig
@@ -174,7 +174,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/nsh/defconfig b/configs/stm3210e-eval/nsh/defconfig
index facfe105a1..1341c58916 100755
--- a/configs/stm3210e-eval/nsh/defconfig
+++ b/configs/stm3210e-eval/nsh/defconfig
@@ -174,7 +174,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/nsh2/defconfig b/configs/stm3210e-eval/nsh2/defconfig
index c30691cc98..0ce49deb5c 100644
--- a/configs/stm3210e-eval/nsh2/defconfig
+++ b/configs/stm3210e-eval/nsh2/defconfig
@@ -217,7 +217,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/nx/defconfig b/configs/stm3210e-eval/nx/defconfig
index 0833e7a787..6569c9a652 100644
--- a/configs/stm3210e-eval/nx/defconfig
+++ b/configs/stm3210e-eval/nx/defconfig
@@ -174,7 +174,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/nxconsole/defconfig b/configs/stm3210e-eval/nxconsole/defconfig
index 637967efc5..070bcde42a 100644
--- a/configs/stm3210e-eval/nxconsole/defconfig
+++ b/configs/stm3210e-eval/nxconsole/defconfig
@@ -174,7 +174,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/nxlines/defconfig b/configs/stm3210e-eval/nxlines/defconfig
index 0a124407af..8517f45e52 100644
--- a/configs/stm3210e-eval/nxlines/defconfig
+++ b/configs/stm3210e-eval/nxlines/defconfig
@@ -174,7 +174,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/nxtext/defconfig b/configs/stm3210e-eval/nxtext/defconfig
index 14e20946e4..d554a0a7a9 100644
--- a/configs/stm3210e-eval/nxtext/defconfig
+++ b/configs/stm3210e-eval/nxtext/defconfig
@@ -174,7 +174,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/ostest/defconfig b/configs/stm3210e-eval/ostest/defconfig
index 8585235ec4..abb4b925ca 100755
--- a/configs/stm3210e-eval/ostest/defconfig
+++ b/configs/stm3210e-eval/ostest/defconfig
@@ -186,7 +186,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/pm/defconfig b/configs/stm3210e-eval/pm/defconfig
index f7ae420e4f..00d307c64c 100644
--- a/configs/stm3210e-eval/pm/defconfig
+++ b/configs/stm3210e-eval/pm/defconfig
@@ -227,7 +227,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/usbserial/defconfig b/configs/stm3210e-eval/usbserial/defconfig
index ac3ff1c9a3..0672be24d9 100755
--- a/configs/stm3210e-eval/usbserial/defconfig
+++ b/configs/stm3210e-eval/usbserial/defconfig
@@ -175,7 +175,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3210e-eval/usbstorage/defconfig b/configs/stm3210e-eval/usbstorage/defconfig
index 160d952370..57facca011 100755
--- a/configs/stm3210e-eval/usbstorage/defconfig
+++ b/configs/stm3210e-eval/usbstorage/defconfig
@@ -174,7 +174,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3220g-eval/dhcpd/defconfig b/configs/stm3220g-eval/dhcpd/defconfig
index 762607bd05..39f2427fd7 100644
--- a/configs/stm3220g-eval/dhcpd/defconfig
+++ b/configs/stm3220g-eval/dhcpd/defconfig
@@ -228,7 +228,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3220g-eval/nettest/defconfig b/configs/stm3220g-eval/nettest/defconfig
index 9262e8c24e..a186ad67ce 100644
--- a/configs/stm3220g-eval/nettest/defconfig
+++ b/configs/stm3220g-eval/nettest/defconfig
@@ -228,7 +228,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3220g-eval/nsh/defconfig b/configs/stm3220g-eval/nsh/defconfig
index ca1d914de2..92741b91fb 100644
--- a/configs/stm3220g-eval/nsh/defconfig
+++ b/configs/stm3220g-eval/nsh/defconfig
@@ -251,7 +251,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3220g-eval/nsh2/defconfig b/configs/stm3220g-eval/nsh2/defconfig
index 324c920d72..98b8b1923e 100644
--- a/configs/stm3220g-eval/nsh2/defconfig
+++ b/configs/stm3220g-eval/nsh2/defconfig
@@ -251,7 +251,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3220g-eval/nxwm/defconfig b/configs/stm3220g-eval/nxwm/defconfig
index 41f365257e..32d9c31ebb 100644
--- a/configs/stm3220g-eval/nxwm/defconfig
+++ b/configs/stm3220g-eval/nxwm/defconfig
@@ -251,7 +251,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3220g-eval/ostest/defconfig b/configs/stm3220g-eval/ostest/defconfig
index b8663a72a9..2f69fdc24b 100644
--- a/configs/stm3220g-eval/ostest/defconfig
+++ b/configs/stm3220g-eval/ostest/defconfig
@@ -228,7 +228,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3220g-eval/telnetd/defconfig b/configs/stm3220g-eval/telnetd/defconfig
index 28670bb476..c41c370881 100644
--- a/configs/stm3220g-eval/telnetd/defconfig
+++ b/configs/stm3220g-eval/telnetd/defconfig
@@ -228,7 +228,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/dhcpd/defconfig b/configs/stm3240g-eval/dhcpd/defconfig
index e33b62f871..dd0342d70b 100644
--- a/configs/stm3240g-eval/dhcpd/defconfig
+++ b/configs/stm3240g-eval/dhcpd/defconfig
@@ -234,7 +234,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/discover/defconfig b/configs/stm3240g-eval/discover/defconfig
index 7c1163b9b4..d7165573c9 100644
--- a/configs/stm3240g-eval/discover/defconfig
+++ b/configs/stm3240g-eval/discover/defconfig
@@ -472,7 +472,6 @@ CONFIG_STDIO_BUFFER_SIZE=256
 CONFIG_STDIO_LINEBUFFER=y
 CONFIG_NUNGET_CHARS=2
 CONFIG_LIB_HOMEDIR="/"
-# CONFIG_HAVE_LIBM is not set
 # CONFIG_NOPRINTF_FIELDWIDTH is not set
 # CONFIG_LIBC_FLOATINGPOINT is not set
 # CONFIG_EOL_IS_CR is not set
diff --git a/configs/stm3240g-eval/nettest/defconfig b/configs/stm3240g-eval/nettest/defconfig
index 813912b848..5c5053dda8 100644
--- a/configs/stm3240g-eval/nettest/defconfig
+++ b/configs/stm3240g-eval/nettest/defconfig
@@ -234,7 +234,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/nsh/defconfig b/configs/stm3240g-eval/nsh/defconfig
index 8c7c290782..1501e32d1b 100644
--- a/configs/stm3240g-eval/nsh/defconfig
+++ b/configs/stm3240g-eval/nsh/defconfig
@@ -256,7 +256,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/nsh2/defconfig b/configs/stm3240g-eval/nsh2/defconfig
index 53b0896d81..4e5eff8bd8 100644
--- a/configs/stm3240g-eval/nsh2/defconfig
+++ b/configs/stm3240g-eval/nsh2/defconfig
@@ -258,7 +258,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/nxconsole/defconfig b/configs/stm3240g-eval/nxconsole/defconfig
index f87acc69e4..5eada6ab2b 100644
--- a/configs/stm3240g-eval/nxconsole/defconfig
+++ b/configs/stm3240g-eval/nxconsole/defconfig
@@ -257,7 +257,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/nxwm/defconfig b/configs/stm3240g-eval/nxwm/defconfig
index d1fa395ddb..39ffcd07d3 100644
--- a/configs/stm3240g-eval/nxwm/defconfig
+++ b/configs/stm3240g-eval/nxwm/defconfig
@@ -257,7 +257,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/ostest/defconfig b/configs/stm3240g-eval/ostest/defconfig
index cc7a9ac58b..3c29fca51c 100644
--- a/configs/stm3240g-eval/ostest/defconfig
+++ b/configs/stm3240g-eval/ostest/defconfig
@@ -233,7 +233,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/telnetd/defconfig b/configs/stm3240g-eval/telnetd/defconfig
index 4ab86aeb99..8d5b449744 100644
--- a/configs/stm3240g-eval/telnetd/defconfig
+++ b/configs/stm3240g-eval/telnetd/defconfig
@@ -234,7 +234,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/webserver/defconfig b/configs/stm3240g-eval/webserver/defconfig
index 8921d503ce..1ea4cf9438 100644
--- a/configs/stm3240g-eval/webserver/defconfig
+++ b/configs/stm3240g-eval/webserver/defconfig
@@ -257,7 +257,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm3240g-eval/xmlrpc/defconfig b/configs/stm3240g-eval/xmlrpc/defconfig
index 20639dac42..308203e273 100644
--- a/configs/stm3240g-eval/xmlrpc/defconfig
+++ b/configs/stm3240g-eval/xmlrpc/defconfig
@@ -465,7 +465,6 @@ CONFIG_STDIO_BUFFER_SIZE=256
 CONFIG_STDIO_LINEBUFFER=y
 CONFIG_NUNGET_CHARS=2
 CONFIG_LIB_HOMEDIR="/"
-# CONFIG_HAVE_LIBM is not set
 # CONFIG_NOPRINTF_FIELDWIDTH is not set
 # CONFIG_LIBC_FLOATINGPOINT is not set
 # CONFIG_EOL_IS_CR is not set
diff --git a/configs/stm32f4discovery/elf/defconfig b/configs/stm32f4discovery/elf/defconfig
index 6d72e4a9ee..5bbef5e73a 100644
--- a/configs/stm32f4discovery/elf/defconfig
+++ b/configs/stm32f4discovery/elf/defconfig
@@ -397,7 +397,6 @@ CONFIG_STDIO_BUFFER_SIZE=256
 CONFIG_STDIO_LINEBUFFER=y
 CONFIG_NUNGET_CHARS=2
 CONFIG_LIB_HOMEDIR="/"
-# CONFIG_HAVE_LIBM is not set
 # CONFIG_NOPRINTF_FIELDWIDTH is not set
 # CONFIG_LIBC_FLOATINGPOINT is not set
 # CONFIG_EOL_IS_CR is not set
diff --git a/configs/stm32f4discovery/nsh/defconfig b/configs/stm32f4discovery/nsh/defconfig
index c216c5997c..4461c08ce2 100644
--- a/configs/stm32f4discovery/nsh/defconfig
+++ b/configs/stm32f4discovery/nsh/defconfig
@@ -239,7 +239,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm32f4discovery/nxlines/defconfig b/configs/stm32f4discovery/nxlines/defconfig
index e1e4f21316..737b015b1f 100644
--- a/configs/stm32f4discovery/nxlines/defconfig
+++ b/configs/stm32f4discovery/nxlines/defconfig
@@ -239,7 +239,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/stm32f4discovery/ostest/defconfig b/configs/stm32f4discovery/ostest/defconfig
index 1683657303..ccd9c648aa 100644
--- a/configs/stm32f4discovery/ostest/defconfig
+++ b/configs/stm32f4discovery/ostest/defconfig
@@ -387,7 +387,6 @@ CONFIG_SYMTAB_ORDEREDBYNAME=y
 CONFIG_STDIO_BUFFER_SIZE=256
 CONFIG_STDIO_LINEBUFFER=y
 CONFIG_NUNGET_CHARS=2
-# CONFIG_HAVE_LIBM is not set
 # CONFIG_NOPRINTF_FIELDWIDTH is not set
 # CONFIG_LIBC_FLOATINGPOINT is not set
 # CONFIG_EOL_IS_CR is not set
diff --git a/configs/stm32f4discovery/pm/defconfig b/configs/stm32f4discovery/pm/defconfig
index 07a99c764d..6785ec46ed 100644
--- a/configs/stm32f4discovery/pm/defconfig
+++ b/configs/stm32f4discovery/pm/defconfig
@@ -240,7 +240,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/sure-pic32mx/nsh/defconfig b/configs/sure-pic32mx/nsh/defconfig
index 8025f968c3..ae7b4b83e3 100644
--- a/configs/sure-pic32mx/nsh/defconfig
+++ b/configs/sure-pic32mx/nsh/defconfig
@@ -162,7 +162,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/sure-pic32mx/ostest/defconfig b/configs/sure-pic32mx/ostest/defconfig
index f3c3fee36b..95c0448510 100644
--- a/configs/sure-pic32mx/ostest/defconfig
+++ b/configs/sure-pic32mx/ostest/defconfig
@@ -156,7 +156,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/sure-pic32mx/usbnsh/defconfig b/configs/sure-pic32mx/usbnsh/defconfig
index cdebb2953b..cfdc83d4be 100644
--- a/configs/sure-pic32mx/usbnsh/defconfig
+++ b/configs/sure-pic32mx/usbnsh/defconfig
@@ -162,7 +162,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/teensy/hello/defconfig b/configs/teensy/hello/defconfig
index 83176f57e9..05349bf473 100644
--- a/configs/teensy/hello/defconfig
+++ b/configs/teensy/hello/defconfig
@@ -105,7 +105,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/teensy/nsh/defconfig b/configs/teensy/nsh/defconfig
index 0908f02430..f8e71d7e94 100755
--- a/configs/teensy/nsh/defconfig
+++ b/configs/teensy/nsh/defconfig
@@ -105,7 +105,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/teensy/usbstorage/defconfig b/configs/teensy/usbstorage/defconfig
index 94cc301db3..08b8fd842e 100755
--- a/configs/teensy/usbstorage/defconfig
+++ b/configs/teensy/usbstorage/defconfig
@@ -105,7 +105,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/twr-k60n512/nsh/defconfig b/configs/twr-k60n512/nsh/defconfig
index d8ccd6a6d3..d4b8f77fa8 100644
--- a/configs/twr-k60n512/nsh/defconfig
+++ b/configs/twr-k60n512/nsh/defconfig
@@ -171,7 +171,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/twr-k60n512/ostest/defconfig b/configs/twr-k60n512/ostest/defconfig
index 8909add134..8505ac12d8 100644
--- a/configs/twr-k60n512/ostest/defconfig
+++ b/configs/twr-k60n512/ostest/defconfig
@@ -171,7 +171,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ubw32/nsh/defconfig b/configs/ubw32/nsh/defconfig
index afa4e10c8a..a6fe0051d4 100644
--- a/configs/ubw32/nsh/defconfig
+++ b/configs/ubw32/nsh/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/ubw32/ostest/defconfig b/configs/ubw32/ostest/defconfig
index 0849fe800e..857684409e 100644
--- a/configs/ubw32/ostest/defconfig
+++ b/configs/ubw32/ostest/defconfig
@@ -155,7 +155,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MOTOROLA_SREC=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/us7032evb1/nsh/defconfig b/configs/us7032evb1/nsh/defconfig
index 02d42aebe5..7dd5dc6983 100644
--- a/configs/us7032evb1/nsh/defconfig
+++ b/configs/us7032evb1/nsh/defconfig
@@ -95,7 +95,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=y
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/us7032evb1/ostest/defconfig b/configs/us7032evb1/ostest/defconfig
index f92a55461e..286c619989 100644
--- a/configs/us7032evb1/ostest/defconfig
+++ b/configs/us7032evb1/ostest/defconfig
@@ -95,7 +95,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=y
 CONFIG_RAW_BINARY=y
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/vsn/nsh/defconfig b/configs/vsn/nsh/defconfig
index 8c59b42981..a43deab6f1 100755
--- a/configs/vsn/nsh/defconfig
+++ b/configs/vsn/nsh/defconfig
@@ -214,7 +214,6 @@ CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_MOTOROLA_SREC=y
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/xtrs/nsh/defconfig b/configs/xtrs/nsh/defconfig
index b8bd5d6f28..7065ad8d5c 100644
--- a/configs/xtrs/nsh/defconfig
+++ b/configs/xtrs/nsh/defconfig
@@ -55,7 +55,6 @@ CONFIG_UART_TXBUFSIZE=256
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 CONFIG_LINKER_START_AREA=0x5200
 CONFIG_LINKER_CODE_AREA=0x5300
diff --git a/configs/xtrs/ostest/defconfig b/configs/xtrs/ostest/defconfig
index 9c88c5d8fb..5759b9105f 100644
--- a/configs/xtrs/ostest/defconfig
+++ b/configs/xtrs/ostest/defconfig
@@ -55,7 +55,6 @@ CONFIG_UART_TXBUFSIZE=256
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 CONFIG_LINKER_START_AREA=0x5200
 CONFIG_LINKER_CODE_AREA=0x5300
diff --git a/configs/xtrs/pashello/defconfig b/configs/xtrs/pashello/defconfig
index d187ccec58..0d80ec0741 100644
--- a/configs/xtrs/pashello/defconfig
+++ b/configs/xtrs/pashello/defconfig
@@ -55,7 +55,6 @@ CONFIG_UART_TXBUFSIZE=256
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 CONFIG_LINKER_START_AREA=0x5200
 CONFIG_LINKER_CODE_AREA=0x5300
diff --git a/configs/z16f2800100zcog/ostest/defconfig b/configs/z16f2800100zcog/ostest/defconfig
index 24cca2a6aa..0bfb09ea81 100644
--- a/configs/z16f2800100zcog/ostest/defconfig
+++ b/configs/z16f2800100zcog/ostest/defconfig
@@ -73,7 +73,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/z16f2800100zcog/pashello/defconfig b/configs/z16f2800100zcog/pashello/defconfig
index daf98c7d6e..1c2fb80f20 100644
--- a/configs/z16f2800100zcog/pashello/defconfig
+++ b/configs/z16f2800100zcog/pashello/defconfig
@@ -73,7 +73,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/z80sim/nsh/defconfig b/configs/z80sim/nsh/defconfig
index 87195b6e86..5dd0cdc4b3 100644
--- a/configs/z80sim/nsh/defconfig
+++ b/configs/z80sim/nsh/defconfig
@@ -55,7 +55,6 @@ CONFIG_UART_TXBUFSIZE=64
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/z80sim/ostest/defconfig b/configs/z80sim/ostest/defconfig
index 4fbca2e16a..9fa525259e 100644
--- a/configs/z80sim/ostest/defconfig
+++ b/configs/z80sim/ostest/defconfig
@@ -55,7 +55,6 @@ CONFIG_UART_TXBUFSIZE=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/z80sim/pashello/defconfig b/configs/z80sim/pashello/defconfig
index 1c50f71ff0..db32f93fb8 100644
--- a/configs/z80sim/pashello/defconfig
+++ b/configs/z80sim/pashello/defconfig
@@ -55,7 +55,6 @@ CONFIG_UART_TXBUFSIZE=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/z8encore000zco/ostest/defconfig b/configs/z8encore000zco/ostest/defconfig
index 2fb427105f..35ed60abad 100644
--- a/configs/z8encore000zco/ostest/defconfig
+++ b/configs/z8encore000zco/ostest/defconfig
@@ -71,7 +71,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup
diff --git a/configs/z8f64200100kit/ostest/defconfig b/configs/z8f64200100kit/ostest/defconfig
index d9c5a51a5b..3384346986 100644
--- a/configs/z8f64200100kit/ostest/defconfig
+++ b/configs/z8f64200100kit/ostest/defconfig
@@ -71,7 +71,6 @@ CONFIG_UART1_2STOP=0
 CONFIG_RRLOAD_BINARY=n
 CONFIG_INTELHEX_BINARY=n
 CONFIG_RAW_BINARY=n
-CONFIG_HAVE_LIBM=n
 
 #
 # General OS setup