Commit 25dfeeb7 authored by Sam Ravnborg's avatar Sam Ravnborg Committed by Ingo Molnar

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: default avatarSam Ravnborg <sam@ravnborg.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 0a6ef376
...@@ -64,14 +64,10 @@ else ...@@ -64,14 +64,10 @@ else
KBUILD_CFLAGS += -mno-red-zone KBUILD_CFLAGS += -mno-red-zone
KBUILD_CFLAGS += -mcmodel=kernel KBUILD_CFLAGS += -mcmodel=kernel
KBUILD_CFLAGS += -Wno-sign-compare
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
# -funit-at-a-time shrinks the kernel .text considerably # -funit-at-a-time shrinks the kernel .text considerably
# unfortunately it makes reading oopses harder. # unfortunately it makes reading oopses harder.
KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 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 # this works around some issues with generating unwind tables in older gccs
# newer gccs do it by default # newer gccs do it by default
KBUILD_CFLAGS += -maccumulate-outgoing-args KBUILD_CFLAGS += -maccumulate-outgoing-args
...@@ -98,7 +94,15 @@ KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) ...@@ -98,7 +94,15 @@ KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
LDFLAGS := -m elf_$(UTS_MACHINE) LDFLAGS := -m elf_$(UTS_MACHINE)
OBJCOPYFLAGS := -O binary -R .note -R .comment -S OBJCOPYFLAGS := -O binary -R .note -R .comment -S
# Speed up the build
KBUILD_CFLAGS += -pipe 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 # Sub architecture support
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment