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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/powerpc/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/powerpc/Makefile')
| -rw-r--r-- | arch/powerpc/Makefile | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 643839a3f5d8..51309848c11d 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -77,8 +77,8 @@ CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc CFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -ffixed-r2 -mmultiple CPPFLAGS += $(CPPFLAGS-y) AFLAGS += $(AFLAGS-y) -CFLAGS += -msoft-float -pipe $(CFLAGS-y) -CPP = $(CC) -E $(CFLAGS) +KBUILD_CFLAGS += -msoft-float -pipe $(CFLAGS-y) +CPP = $(CC) -E $(KBUILD_CFLAGS) CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__ @@ -88,35 +88,35 @@ GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi ifeq ($(CONFIG_POWER4_ONLY),y) ifeq ($(CONFIG_ALTIVEC),y) ifeq ($(GCC_BROKEN_VEC),y) - CFLAGS += $(call cc-option,-mcpu=970) + KBUILD_CFLAGS += $(call cc-option,-mcpu=970) else - CFLAGS += $(call cc-option,-mcpu=power4) + KBUILD_CFLAGS += $(call cc-option,-mcpu=power4) endif else - CFLAGS += $(call cc-option,-mcpu=power4) + KBUILD_CFLAGS += $(call cc-option,-mcpu=power4) endif else - CFLAGS += $(call cc-option,-mtune=power4) + KBUILD_CFLAGS += $(call cc-option,-mtune=power4) endif endif ifeq ($(CONFIG_TUNE_CELL),y) - CFLAGS += $(call cc-option,-mtune=cell) + KBUILD_CFLAGS += $(call cc-option,-mtune=cell) endif # No AltiVec instruction when building kernel -CFLAGS += $(call cc-option,-mno-altivec) +KBUILD_CFLAGS += $(call cc-option,-mno-altivec) # Enable unit-at-a-time mode when possible. It shrinks the # kernel considerably. -CFLAGS += $(call cc-option,-funit-at-a-time) +KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) # Never use string load/store instructions as they are # often slow when they are implemented at all -CFLAGS += -mno-string +KBUILD_CFLAGS += -mno-string ifeq ($(CONFIG_6xx),y) -CFLAGS += -mcpu=powerpc +KBUILD_CFLAGS += -mcpu=powerpc endif cpu-as-$(CONFIG_4xx) += -Wa,-m405 @@ -126,7 +126,7 @@ cpu-as-$(CONFIG_E500) += -Wa,-me500 cpu-as-$(CONFIG_E200) += -Wa,-me200 AFLAGS += $(cpu-as-y) -CFLAGS += $(cpu-as-y) +KBUILD_CFLAGS += $(cpu-as-y) head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o |