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| author | Sam Ravnborg <sam@neptun.(none)> | 2007-10-14 16:21:35 -0400 |
|---|---|---|
| committer | Sam Ravnborg <sam@neptun.(none)> | 2007-10-14 16:21:35 -0400 |
| commit | a0f97e06a43cf524e616f09e6af3398e1e9c1c5b (patch) | |
| tree | 2503b24bdbc144aea9ea5bde6ead94b3406eaf98 /arch/ppc | |
| 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/ppc')
| -rw-r--r-- | arch/ppc/Makefile | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/ppc/Makefile b/arch/ppc/Makefile index eee6264e8a04..43802e95c892 100644 --- a/arch/ppc/Makefile +++ b/arch/ppc/Makefile | |||
| @@ -24,20 +24,20 @@ LDFLAGS_vmlinux := -Ttext $(KERNELLOAD) -Bstatic | |||
| 24 | # The -Iarch/$(ARCH)/include is temporary while we are merging | 24 | # The -Iarch/$(ARCH)/include is temporary while we are merging |
| 25 | CPPFLAGS += -Iarch/$(ARCH) -Iarch/$(ARCH)/include | 25 | CPPFLAGS += -Iarch/$(ARCH) -Iarch/$(ARCH)/include |
| 26 | AFLAGS += -Iarch/$(ARCH) | 26 | AFLAGS += -Iarch/$(ARCH) |
| 27 | CFLAGS += -Iarch/$(ARCH) -msoft-float -pipe \ | 27 | KBUILD_CFLAGS += -Iarch/$(ARCH) -msoft-float -pipe \ |
| 28 | -ffixed-r2 -mmultiple | 28 | -ffixed-r2 -mmultiple |
| 29 | 29 | ||
| 30 | # No AltiVec instruction when building kernel | 30 | # No AltiVec instruction when building kernel |
| 31 | CFLAGS += $(call cc-option, -mno-altivec) | 31 | KBUILD_CFLAGS += $(call cc-option, -mno-altivec) |
| 32 | 32 | ||
| 33 | CPP = $(CC) -E $(CFLAGS) | 33 | CPP = $(CC) -E $(KBUILD_CFLAGS) |
| 34 | # Temporary hack until we have migrated to asm-powerpc | 34 | # Temporary hack until we have migrated to asm-powerpc |
| 35 | LINUXINCLUDE += -Iarch/$(ARCH)/include | 35 | LINUXINCLUDE += -Iarch/$(ARCH)/include |
| 36 | 36 | ||
| 37 | CHECKFLAGS += -D__powerpc__ | 37 | CHECKFLAGS += -D__powerpc__ |
| 38 | 38 | ||
| 39 | ifndef CONFIG_FSL_BOOKE | 39 | ifndef CONFIG_FSL_BOOKE |
| 40 | CFLAGS += -mstring | 40 | KBUILD_CFLAGS += -mstring |
| 41 | endif | 41 | endif |
| 42 | 42 | ||
| 43 | cpu-as-$(CONFIG_4xx) += -Wa,-m405 | 43 | cpu-as-$(CONFIG_4xx) += -Wa,-m405 |
| @@ -46,7 +46,7 @@ cpu-as-$(CONFIG_E500) += -Wa,-me500 | |||
| 46 | cpu-as-$(CONFIG_E200) += -Wa,-me200 | 46 | cpu-as-$(CONFIG_E200) += -Wa,-me200 |
| 47 | 47 | ||
| 48 | AFLAGS += $(cpu-as-y) | 48 | AFLAGS += $(cpu-as-y) |
| 49 | CFLAGS += $(cpu-as-y) | 49 | KBUILD_CFLAGS += $(cpu-as-y) |
| 50 | 50 | ||
| 51 | # Default to the common case. | 51 | # Default to the common case. |
| 52 | KBUILD_DEFCONFIG := common_defconfig | 52 | KBUILD_DEFCONFIG := common_defconfig |