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authorSam Ravnborg <sam@ravnborg.org>2008-01-30 13:32:21 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:32:21 +0100
commit25dfeeb757bdf06521d65973676b21dac1d26d20 (patch)
treea7502f47c72d7bfda2b3cfc0e6bd4d5365c0f360 /arch/x86
parent0a6ef376d4baf298aaa2db71794df821a0d7795c (diff)
x86: share more options between 32 and 64 bit build
On recommendation from Andi Kleen share a few more options between 32 and 64 bit builds. A defconfig build for i386 did not show any difference in size of text and data. The additional shared options are: -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Makefile12
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index d3debde0ce0..0c5b4072d13 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -64,14 +64,10 @@ else
KBUILD_CFLAGS += -mno-red-zone
KBUILD_CFLAGS += -mcmodel=kernel
- KBUILD_CFLAGS += -Wno-sign-compare
- KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
# -funit-at-a-time shrinks the kernel .text considerably
# unfortunately it makes reading oopses harder.
KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
- # prevent gcc from generating any FP code by mistake
- KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
# this works around some issues with generating unwind tables in older gccs
# newer gccs do it by default
KBUILD_CFLAGS += -maccumulate-outgoing-args
@@ -98,7 +94,15 @@ KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
LDFLAGS := -m elf_$(UTS_MACHINE)
OBJCOPYFLAGS := -O binary -R .note -R .comment -S
+
+# Speed up the build
KBUILD_CFLAGS += -pipe
+# Workaround for a gcc prelease that unfortunately was shipped in a suse release
+KBUILD_CFLAGS += -Wno-sign-compare
+#
+KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
+# prevent gcc from generating any FP code by mistake
+KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
###
# Sub architecture support