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toolchain/crosstool-NG: disable decimal floats

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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>
This commit is contained in:
Yann E. MORIN 2012-05-15 11:15:50 +00:00 committed by Peter Korsgaard
parent 9950d485cd
commit cb30e13051
3 changed files with 6 additions and 6 deletions
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4
toolchain/toolchain-crosstool-ng/crosstool-ng.config-eglibc
View file

@ -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
#

4
toolchain/toolchain-crosstool-ng/crosstool-ng.config-glibc
View file

@ -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
#

4
toolchain/toolchain-crosstool-ng/crosstool-ng.config-uClibc
View file

@ -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
#