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[v2] powerpc/Makefiles: Fix clang/llvm build

Message ID 20180906070710.29944-1-joel@jms.id.au (mailing list archive)
State Superseded, archived
Headers show
Series [v2] powerpc/Makefiles: Fix clang/llvm build | expand


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Commit Message

Joel Stanley Sept. 6, 2018, 7:07 a.m. UTC
From: Anton Blanchard <anton@samba.org>

Commit 15a3204d24a3 ("powerpc/64s: Set assembler machine type to POWER4")
passes -mpower4 to the assembler. We have more recent instructions in our
assembly files, but gas permits them. The clang/llvm integrated assembler
is more strict, and we get a build failure.

Fix this by calling the assembler with -mcpu=power8 if as supports it,
else fall back to power4.

Suggested-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
 arch/powerpc/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 11a1acba164a..a70639482053 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -238,7 +238,7 @@  cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
 cpu-as-$(CONFIG_ALTIVEC)	+= $(call as-option,-Wa$(comma)-maltivec)
 cpu-as-$(CONFIG_E200)		+= -Wa,-me200
 cpu-as-$(CONFIG_E500)		+= -Wa,-me500
-cpu-as-$(CONFIG_PPC_BOOK3S_64)	+= -Wa,-mpower4
+cpu-as-$(CONFIG_PPC_BOOK3S_64)	+= $(call as-option,-Wa$(comma)-mpower8,-Wa$(comma)-mpower4)
 cpu-as-$(CONFIG_PPC_E500MC)	+= $(call as-option,-Wa$(comma)-me500mc)
 KBUILD_AFLAGS += $(cpu-as-y)