Messages in this thread Patch in this message | | | From | Matthias Kaehlcke <> | Subject | [PATCH] x86/kbuild: Use cc-option to enable -falign-{jumps/loops} | Date | Thu, 13 Apr 2017 10:26:09 -0700 |
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clang currently does not support these optimizations, only enable them when they are available.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org> --- arch/x86/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index a94a4d10f2df..73604e18447a 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -88,10 +88,10 @@ else KBUILD_CFLAGS += -m64 # Align jump targets to 1 byte, not the default 16 bytes: - KBUILD_CFLAGS += -falign-jumps=1 + KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1) # Pack loops tightly as well: - KBUILD_CFLAGS += -falign-loops=1 + KBUILD_CFLAGS += $(call cc-option,-falign-loops=1) # Don't autogenerate traditional x87 instructions KBUILD_CFLAGS += $(call cc-option,-mno-80387) -- 2.12.2.715.g7642488e1d-goog
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