toolchain/crosstool-NG: disable decimal floats

Decimal floats were introduced circa gcc-4.2 or -4.3, and requires
the floating-point environement fenv.h in the C library.

The uClibc .config file used by crosstool-NG to build uClibc is the
same as used by the internal buildroot mechanism, and explcitly
disables fenv support.

The quick workaround is to simply disable decimal floats in all
crosstool-NG config files.

In the long run, it might be better to check this situation, and/or
add code and/or options in crosstool-NG to handle this (but it is
much more involved, and this workaround is sane).

Reported-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
CC: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

diff --git a/toolchain/toolchain-crosstool-ng/crosstool-ng.config-eglibc b/toolchain/toolchain-crosstool-ng/crosstool-ng.config-eglibc
index cbad52a6549460c25e2995f4e1cea874dcaac7c1..58cdff2d34b219d1a1eb6eaf3ed564fe6a489d61 100644 (file)
--- a/toolchain/toolchain-crosstool-ng/crosstool-ng.config-eglibc
+++ b/toolchain/toolchain-crosstool-ng/crosstool-ng.config-eglibc
@@ -294,8 +294,8 @@ CT_CC_LANG_CXX=y
 # gcc other options
 #
 CT_CC_ENABLE_CXX_FLAGS=""
-CT_CC_CORE_EXTRA_CONFIG_ARRAY=""
-CT_CC_EXTRA_CONFIG_ARRAY=""
+CT_CC_CORE_EXTRA_CONFIG_ARRAY="--disable-decimal-float"
+CT_CC_EXTRA_CONFIG_ARRAY="--disable-decimal-float"
 CT_CC_STATIC_LIBSTDCXX=y
 
 #

diff --git a/toolchain/toolchain-crosstool-ng/crosstool-ng.config-glibc b/toolchain/toolchain-crosstool-ng/crosstool-ng.config-glibc
index e57a91dfc60937e60413fbd35f57a4c826d7a3d1..db724ab40cac2aacb4ca96e7424c8de3a2d86b5b 100644 (file)
--- a/toolchain/toolchain-crosstool-ng/crosstool-ng.config-glibc
+++ b/toolchain/toolchain-crosstool-ng/crosstool-ng.config-glibc
@@ -294,8 +294,8 @@ CT_CC_LANG_CXX=y
 # gcc other options
 #
 CT_CC_ENABLE_CXX_FLAGS=""
-CT_CC_CORE_EXTRA_CONFIG_ARRAY=""
-CT_CC_EXTRA_CONFIG_ARRAY=""
+CT_CC_CORE_EXTRA_CONFIG_ARRAY="--disable-decimal-float"
+CT_CC_EXTRA_CONFIG_ARRAY="--disable-decimal-float"
 CT_CC_STATIC_LIBSTDCXX=y
 
 #

diff --git a/toolchain/toolchain-crosstool-ng/crosstool-ng.config-uClibc b/toolchain/toolchain-crosstool-ng/crosstool-ng.config-uClibc
index c1150965a9845ee3ed57dfc969af3a6c44adc9cc..5f1ee7ea8b8cec70fdcd074841b1baf0d4c6545d 100644 (file)
--- a/toolchain/toolchain-crosstool-ng/crosstool-ng.config-uClibc
+++ b/toolchain/toolchain-crosstool-ng/crosstool-ng.config-uClibc
@@ -293,8 +293,8 @@ CT_CC_LANG_CXX=y
 # gcc other options
 #
 CT_CC_ENABLE_CXX_FLAGS=""
-CT_CC_CORE_EXTRA_CONFIG_ARRAY=""
-CT_CC_EXTRA_CONFIG_ARRAY=""
+CT_CC_CORE_EXTRA_CONFIG_ARRAY="--disable-decimal-float"
+CT_CC_EXTRA_CONFIG_ARRAY="--disable-decimal-float"
 CT_CC_STATIC_LIBSTDCXX=y
 
 #