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| author | Sam Ravnborg <sam@neptun.(none)> | 2007-10-14 22:21:35 +0200 |
|---|---|---|
| committer | Sam Ravnborg <sam@neptun.(none)> | 2007-10-14 22:21:35 +0200 |
| commit | a0f97e06a43cf524e616f09e6af3398e1e9c1c5b (patch) | |
| tree | 2503b24bdbc144aea9ea5bde6ead94b3406eaf98 /arch/i386/Makefile | |
| parent | 9a39e273d4df0560c724c5fe71f6314a0583ca2b (diff) | |
kbuild: enable 'make CFLAGS=...' to add additional options to CC
The variable CFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.
On top of that several people over time has asked for a way to
pass in additional flags to gcc.
This patch replace use of CFLAGS with KBUILD_CFLAGS all over the
tree and enabling one to use:
make CFLAGS=...
to specify additional gcc commandline options.
One usecase is when trying to find gcc bugs but other
use cases has been requested too.
Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k
Test was simple to do a defconfig build, apply the patch and check
that nothing got rebuild.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'arch/i386/Makefile')
| -rw-r--r-- | arch/i386/Makefile | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/i386/Makefile b/arch/i386/Makefile index 5e50dbf00f3..fc3c8e88b74 100644 --- a/arch/i386/Makefile +++ b/arch/i386/Makefile @@ -34,10 +34,10 @@ LDFLAGS_vmlinux := --emit-relocs endif CHECKFLAGS += -D__i386__ -CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return +KBUILD_CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return # prevent gcc from keeping the stack 16 byte aligned -CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) +KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2) # CPU-specific tuning. Anything which can be shared with UML should go here. include $(srctree)/arch/i386/Makefile.cpu @@ -51,7 +51,7 @@ cflags-y += -maccumulate-outgoing-args # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use # a lot more stack due to the lack of sharing of stacklots: -CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;) +KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;) # do binutils support CFI? cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,) @@ -61,7 +61,7 @@ AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_end cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,) AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,) -CFLAGS += $(cflags-y) +KBUILD_CFLAGS += $(cflags-y) # Default subarch .c files mcore-y := arch/x86/mach-default @@ -116,7 +116,7 @@ drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/ drivers-$(CONFIG_PM) += arch/x86/power/ drivers-$(CONFIG_FB) += arch/x86/video/ -CFLAGS += $(mflags-y) +KBUILD_CFLAGS += $(mflags-y) AFLAGS += $(mflags-y) boot := arch/x86/boot |