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| author | Anton Blanchard <anton@samba.org> | 2012-04-17 18:42:54 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-04-30 15:37:26 +1000 |
| commit | 82a8508406906a39ed04cb59d83b1703d78dc8b3 (patch) | |
| tree | d6d07f56aedde9968c33847af31343778406a3cc /arch/powerpc | |
| parent | 694caf0255dcab506d1e174c96a65ab65d96e108 (diff) | |
| download | linux-82a8508406906a39ed04cb59d83b1703d78dc8b3.tar.gz linux-82a8508406906a39ed04cb59d83b1703d78dc8b3.tar.bz2 linux-82a8508406906a39ed04cb59d83b1703d78dc8b3.zip | |
powerpc: Require gcc 4.0 on 64-bit
Older versions of gcc had issues with using -maltivec together with
-mcpu of a non altivec capable CPU. We work around it by specifying
-mcpu=970, but the logic is complicated.
In preparation for adding more -mcpu targets, remove the workaround
and just require gcc 4.0 for 64-bit builds.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/Makefile | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 6524c6e21896..68455ddb63b7 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -234,10 +234,11 @@ archprepare: checkbin # Use the file '.tmp_gas_check' for binutils tests, as gas won't output # to stdout and these checks are run even on install targets. TOUT := .tmp_gas_check -# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec -# instructions. -# gcc-3.4 and binutils-2.14 are a fatal combination. +# Check gcc and binutils versions: +# - gcc-3.4 and binutils-2.14 are a fatal combination +# - Require gcc 4.0 or above on 64-bit +# - gcc-4.2.0 has issues compiling modules on 64-bit checkbin: @if test "$(call cc-version)" = "0304" ; then \ if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ @@ -247,6 +248,12 @@ checkbin: false; \ fi ; \ fi + @if test "$(call cc-version)" -lt "0400" \ + && test "x${CONFIG_PPC64}" = "xy" ; then \ + echo -n "Sorry, GCC v4.0 or above is required to build " ; \ + echo "the 64-bit powerpc kernel." ; \ + false ; \ + fi @if test "$(call cc-fullversion)" = "040200" \ && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ |