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

Signed-off-by: Anton Blanchard <an...@samba.org>
---
 arch/powerpc/Makefile | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 7a0daad..7c08b4e 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -111,7 +111,7 @@ 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)
@@ -158,7 +158,8 @@ 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)__
@@ -190,7 +191,7 @@ 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
-- 
2.1.4

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