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powerpc: Only use -mtraceback=no, -mno-string and -msoft-float if toolchain supports it 

These options are not recognised on LLVM, so use call cc-option to check
for support.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
hifive-unleashed-5.1
Anton Blanchard 2015-05-26 08:53:27 +10:00 committed by Michael Ellerman
parent 1fb3f5a7ca
commit a50a862e74
1 changed files with 4 additions and 3 deletions
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7
arch/powerpc/Makefile
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@ -113,7 +113,7 @@ else
endif
endif
CFLAGS-$(CONFIG_PPC64) := -mtraceback=no
CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,-mcall-aixdesc)
AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
@ -160,7 +160,8 @@ asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y)
KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
KBUILD_CFLAGS += $(call cc-option,-msoft-float)
KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
CPP = $(CC) -E $(KBUILD_CFLAGS)
CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
@ -192,7 +193,7 @@ KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
# Never use string load/store instructions as they are
# often slow when they are implemented at all
KBUILD_CFLAGS += -mno-string
KBUILD_CFLAGS += $(call cc-option,-mno-string)
ifeq ($(CONFIG_6xx),y)
KBUILD_CFLAGS += -mcpu=powerpc