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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/cris/Makefile | |
| parent | 9a39e273d4df0560c724c5fe71f6314a0583ca2b (diff) | |
| download | lwn-a0f97e06a43cf524e616f09e6af3398e1e9c1c5b.tar.gz lwn-a0f97e06a43cf524e616f09e6af3398e1e9c1c5b.zip | |
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/cris/Makefile')
| -rw-r--r-- | arch/cris/Makefile | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/cris/Makefile b/arch/cris/Makefile index ee114699ef8e..32ef6f3cce06 100644 --- a/arch/cris/Makefile +++ b/arch/cris/Makefile @@ -31,16 +31,16 @@ OBJCOPYFLAGS := -O binary -R .note -R .comment -S CPPFLAGS_vmlinux.lds = -DDRAM_VIRTUAL_BASE=0x$(CONFIG_ETRAX_DRAM_VIRTUAL_BASE) AFLAGS += -mlinux -CFLAGS := $(CFLAGS) -mlinux -march=$(arch-y) -pipe +KBUILD_CFLAGS += -mlinux -march=$(arch-y) -pipe ifdef CONFIG_FRAME_POINTER -CFLAGS := $(subst -fomit-frame-pointer,,$(CFLAGS)) -g -CFLAGS += -fno-omit-frame-pointer +KBUILD_CFLAGS := $(subst -fomit-frame-pointer,,$(KBUILD_CFLAGS)) -g +KBUILD_CFLAGS += -fno-omit-frame-pointer endif head-y := arch/$(ARCH)/$(SARCH)/kernel/head.o -LIBGCC = $(shell $(CC) $(CFLAGS) -print-file-name=libgcc.a) +LIBGCC = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libgcc.a) core-y += arch/$(ARCH)/kernel/ arch/$(ARCH)/mm/ core-y += arch/$(ARCH)/$(SARCH)/kernel/ arch/$(ARCH)/$(SARCH)/mm/ |