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/s390/Makefile | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'arch/s390/Makefile') diff --git a/arch/s390/Makefile b/arch/s390/Makefile index 143ed8e154a..62a0da42c7f 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -15,7 +15,7 @@ ifndef CONFIG_64BIT LDFLAGS := -m elf_s390 -CFLAGS += -m31 +KBUILD_CFLAGS += -m31 AFLAGS += -m31 UTS_MACHINE := s390 STACK_SIZE := 8192 @@ -23,7 +23,7 @@ CHECKFLAGS += -D__s390__ -msize-long else LDFLAGS := -m elf64_s390 MODFLAGS += -fpic -D__PIC__ -CFLAGS += -m64 +KBUILD_CFLAGS += -m64 AFLAGS += -m64 UTS_MACHINE := s390x STACK_SIZE := 16384 @@ -77,8 +77,8 @@ cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE) endif -CFLAGS += -mbackchain -msoft-float $(cflags-y) -CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare +KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) +KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare AFLAGS += $(aflags-y) OBJCOPYFLAGS := -O binary -- cgit v1.2.3