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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/arm/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/arm/Makefile')
| -rw-r--r-- | arch/arm/Makefile | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm/Makefile b/arch/arm/Makefile index fa4ea9ff0797..0b82865ab506 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile | |||
| @@ -14,9 +14,9 @@ LDFLAGS_vmlinux :=-p --no-undefined -X | |||
| 14 | CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET) | 14 | CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET) |
| 15 | OBJCOPYFLAGS :=-O binary -R .note -R .comment -S | 15 | OBJCOPYFLAGS :=-O binary -R .note -R .comment -S |
| 16 | GZFLAGS :=-9 | 16 | GZFLAGS :=-9 |
| 17 | #CFLAGS +=-pipe | 17 | #KBUILD_CFLAGS +=-pipe |
| 18 | # Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb: | 18 | # Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb: |
| 19 | CFLAGS +=$(call cc-option,-marm,) | 19 | KBUILD_CFLAGS +=$(call cc-option,-marm,) |
| 20 | 20 | ||
| 21 | # Do not use arch/arm/defconfig - it's always outdated. | 21 | # Do not use arch/arm/defconfig - it's always outdated. |
| 22 | # Select a platform tht is kept up-to-date | 22 | # Select a platform tht is kept up-to-date |
| @@ -28,7 +28,7 @@ MMUEXT := -nommu | |||
| 28 | endif | 28 | endif |
| 29 | 29 | ||
| 30 | ifeq ($(CONFIG_FRAME_POINTER),y) | 30 | ifeq ($(CONFIG_FRAME_POINTER),y) |
| 31 | CFLAGS +=-fno-omit-frame-pointer -mapcs -mno-sched-prolog | 31 | KBUILD_CFLAGS +=-fno-omit-frame-pointer -mapcs -mno-sched-prolog |
| 32 | endif | 32 | endif |
| 33 | 33 | ||
| 34 | ifeq ($(CONFIG_CPU_BIG_ENDIAN),y) | 34 | ifeq ($(CONFIG_CPU_BIG_ENDIAN),y) |
| @@ -85,7 +85,7 @@ CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-th | |||
| 85 | endif | 85 | endif |
| 86 | 86 | ||
| 87 | # Need -Uarm for gcc < 3.x | 87 | # Need -Uarm for gcc < 3.x |
| 88 | CFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm | 88 | KBUILD_CFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm |
| 89 | AFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) -msoft-float | 89 | AFLAGS +=$(CFLAGS_ABI) $(arch-y) $(tune-y) -msoft-float |
| 90 | 90 | ||
| 91 | CHECKFLAGS += -D__arm__ | 91 | CHECKFLAGS += -D__arm__ |