diff options
| author | Daniel Axtens <dja@axtens.net> | 2021-12-21 16:59:00 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-12-23 22:35:12 +1100 |
| commit | f5140cab448e4819ca6f158cb4130352f73c92e4 (patch) | |
| tree | 717515b551e1890ac028829473139eb29827b530 /arch/powerpc/Makefile | |
| parent | a3ad84da076009c94969fa97f604257667e2980f (diff) | |
powerpc: check for support for -Wa,-m{power4,any}
LLVM's integrated assembler does not like either -Wa,-mpower4
or -Wa,-many. So just don't pass them if they're not supported.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211221055904.555763-3-aik@ozlabs.ru
Diffstat (limited to 'arch/powerpc/Makefile')
| -rw-r--r-- | arch/powerpc/Makefile | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index e9aa4e8b07dd..5f16ac1583c5 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -245,7 +245,9 @@ cpu-as-$(CONFIG_E500) += -Wa,-me500 # When using '-many -mpower4' gas will first try and find a matching power4 # mnemonic and failing that it will allow any valid mnemonic that GAS knows # about. GCC will pass -many to GAS when assembling, clang does not. -cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many +# LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675 +# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway... +cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many) cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) KBUILD_AFLAGS += $(cpu-as-y) |