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| author | Waldemar Brodkorb <wbx@openadk.org> | 2018-03-31 19:54:20 +0200 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@bootlin.com> | 2018-04-01 16:23:33 +0200 |
| commit | 5e58509bfe497c5e85db58f8213b0a44ac79dd3f (patch) | |
| tree | 8b65d84c50b0d75bf3ba6cc72cab9c54fd2966a9 /toolchain/toolchain-wrapper.c | |
| parent | 6087e548007b78ead9cb73bb4d642e3fb5236bd3 (diff) | |
| download | buildroot-5e58509bfe497c5e85db58f8213b0a44ac79dd3f.tar.gz buildroot-5e58509bfe497c5e85db58f8213b0a44ac79dd3f.zip | |
toolchain-wrapper: use -ffp-contract=off on MIPS Xburst for gcc >= 4.6
Since gcc 4.6, GCC deprecated -mfused-madd, -ffp-contract=off should
be used for the Xburst workaround.
Tested with the MIPS Sourcery 2011.03 toolchain (based on gcc 4.5),
the toolchain wrapper uses -mno-fused-madd, as expected:
$ BR2_DEBUG_WRAPPER=2 ./output/host/bin/mips-linux-gnu-gcc -o toto toto.c
Toolchain wrapper executing:
'/home/thomas/toolchains/mips-2011.03/bin/mips-linux-gnu-gcc'
'--sysroot'
'/home/thomas/projets/buildroot/output/host/mipsel-buildroot-linux-gnu/sysroot'
'-mabi=32'
'-msoft-float'
'-mno-fused-madd'
'-EL'
'-march=mips32r2'
'-o'
'toto'
'toto.c'
And with the MIPS Sourcery 2012.09 toolchain (based on gcc 4.7), the
toolchain wrapper uses -ffp-contract=off, as expected:
$ BR2_DEBUG_WRAPPER=2 ./output/host/bin/mips-linux-gnu-gcc -o toto toto.c
Toolchain wrapper executing:
'/home/thomas/toolchains/mips-2012.09/bin/mips-linux-gnu-gcc'
'--sysroot'
'/home/thomas/projets/buildroot/output/host/mipsel-buildroot-linux-gnu/sysroot'
'-mabi=32'
'-msoft-float'
'-ffp-contract=off'
'-EL'
'-march=mips32r2'
'-o'
'toto'
'toto.c'
Fixes the ci20_defconfig build:
https://gitlab.com/buildroot.org/buildroot/-/jobs/60303132
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
[Thomas: rework to continue supporting pre-gcc-4.6 toolchains, extend
the commit log after doing more testing.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Diffstat (limited to 'toolchain/toolchain-wrapper.c')
| -rw-r--r-- | toolchain/toolchain-wrapper.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/toolchain/toolchain-wrapper.c b/toolchain/toolchain-wrapper.c index 2928ea42d0..c5eb813dd0 100644 --- a/toolchain/toolchain-wrapper.c +++ b/toolchain/toolchain-wrapper.c @@ -82,6 +82,9 @@ static char *predef_args[] = { #ifdef BR_NO_FUSED_MADD "-mno-fused-madd", #endif +#ifdef BR_FP_CONTRACT_OFF + "-ffp-contract=off", +#endif #ifdef BR_BINFMT_FLAT "-Wl,-elf2flt", #endif |
