From a0f97e06a43cf524e616f09e6af3398e1e9c1c5b Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Sun, 14 Oct 2007 22:21:35 +0200 Subject: 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 --- arch/ppc/Makefile | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'arch/ppc') diff --git a/arch/ppc/Makefile b/arch/ppc/Makefile index eee6264e8a0..43802e95c89 100644 --- a/arch/ppc/Makefile +++ b/arch/ppc/Makefile @@ -24,20 +24,20 @@ LDFLAGS_vmlinux := -Ttext $(KERNELLOAD) -Bstatic # The -Iarch/$(ARCH)/include is temporary while we are merging CPPFLAGS += -Iarch/$(ARCH) -Iarch/$(ARCH)/include AFLAGS += -Iarch/$(ARCH) -CFLAGS += -Iarch/$(ARCH) -msoft-float -pipe \ +KBUILD_CFLAGS += -Iarch/$(ARCH) -msoft-float -pipe \ -ffixed-r2 -mmultiple # No AltiVec instruction when building kernel -CFLAGS += $(call cc-option, -mno-altivec) +KBUILD_CFLAGS += $(call cc-option, -mno-altivec) -CPP = $(CC) -E $(CFLAGS) +CPP = $(CC) -E $(KBUILD_CFLAGS) # Temporary hack until we have migrated to asm-powerpc LINUXINCLUDE += -Iarch/$(ARCH)/include CHECKFLAGS += -D__powerpc__ ifndef CONFIG_FSL_BOOKE -CFLAGS += -mstring +KBUILD_CFLAGS += -mstring endif cpu-as-$(CONFIG_4xx) += -Wa,-m405 @@ -46,7 +46,7 @@ cpu-as-$(CONFIG_E500) += -Wa,-me500 cpu-as-$(CONFIG_E200) += -Wa,-me200 AFLAGS += $(cpu-as-y) -CFLAGS += $(cpu-as-y) +KBUILD_CFLAGS += $(cpu-as-y) # Default to the common case. KBUILD_DEFCONFIG := common_defconfig -- cgit v1.2.3