From: Nathan Chancellor <nathan@kernel.org>
To: mpe@ellerman.id.au
Cc: npiggin@gmail.com, christophe.leroy@csgroup.eu,
aneesh.kumar@kernel.org, naveen.n.rao@linux.ibm.com,
morbo@google.com, justinstitt@google.com,
linuxppc-dev@lists.ozlabs.org, patches@lists.linux.dev,
llvm@lists.linux.dev, stable@vger.kernel.org,
Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH] powerpc: xor_vmx: Add '-mhard-float' to CFLAGS
Date: Sat, 27 Jan 2024 11:07:43 -0700 [thread overview]
Message-ID: <20240127-ppc-xor_vmx-drop-msoft-float-v1-1-f24140e81376@kernel.org> (raw)
arch/powerpc/lib/xor_vmx.o is built with '-msoft-float' (from the main
powerpc Makefile) and '-maltivec' (from its CFLAGS), which causes an
error when building with clang after a recent change in main:
error: option '-msoft-float' cannot be specified with '-maltivec'
make[6]: *** [scripts/Makefile.build:243: arch/powerpc/lib/xor_vmx.o] Error 1
Explicitly add '-mhard-float' before '-maltivec' in xor_vmx.o's CFLAGS
to override the previous inclusion of '-msoft-float' (as the last option
wins), which matches how other areas of the kernel use '-maltivec', such
as AMDGPU.
Cc: stable@vger.kernel.org
Closes: https://github.com/ClangBuiltLinux/linux/issues/1986
Link: https://github.com/llvm/llvm-project/commit/4792f912b232141ecba4cbae538873be3c28556c
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
arch/powerpc/lib/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 6eac63e79a89..0ab65eeb93ee 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -76,7 +76,7 @@ obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o
obj-$(CONFIG_FTR_FIXUP_SELFTEST) += feature-fixups-test.o
obj-$(CONFIG_ALTIVEC) += xor_vmx.o xor_vmx_glue.o
-CFLAGS_xor_vmx.o += -maltivec $(call cc-option,-mabi=altivec)
+CFLAGS_xor_vmx.o += -mhard-float -maltivec $(call cc-option,-mabi=altivec)
# Enable <altivec.h>
CFLAGS_xor_vmx.o += -isystem $(shell $(CC) -print-file-name=include)
---
base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
change-id: 20240127-ppc-xor_vmx-drop-msoft-float-ad68b437f86c
Best regards,
--
Nathan Chancellor <nathan@kernel.org>
next reply other threads:[~2024-01-27 18:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-27 18:07 Nathan Chancellor [this message]
2024-03-05 22:43 ` [PATCH] powerpc: xor_vmx: Add '-mhard-float' to CFLAGS Nathan Chancellor
2024-03-06 1:01 ` Michael Ellerman
2024-03-06 16:48 ` Nathan Chancellor
2024-03-13 13:19 ` Michael Ellerman
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