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/xtensa/Makefile | 8 +++----- arch/xtensa/boot/boot-redboot/Makefile | 2 +- 2 files changed, 4 insertions(+), 6 deletions(-) (limited to 'arch/xtensa') diff --git a/arch/xtensa/Makefile b/arch/xtensa/Makefile index acf05be2492..56685a88334 100644 --- a/arch/xtensa/Makefile +++ b/arch/xtensa/Makefile @@ -28,11 +28,9 @@ PLATFORM = $(platform-y) export PLATFORM # temporarily until string.h is fixed -cflags-y += -ffreestanding +KBUILD_CFLAGS += -ffreestanding -cflags-y += -pipe -mlongcalls - -CFLAGS += $(cflags-y) +KBUILD_CFLAGS += -pipe -mlongcalls KBUILD_DEFCONFIG := iss_defconfig @@ -56,7 +54,7 @@ endif # -LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name) +LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name) head-y := arch/xtensa/kernel/head.o core-y += arch/xtensa/kernel/ arch/xtensa/mm/ diff --git a/arch/xtensa/boot/boot-redboot/Makefile b/arch/xtensa/boot/boot-redboot/Makefile index f53262c2e1f..74d15d08077 100644 --- a/arch/xtensa/boot/boot-redboot/Makefile +++ b/arch/xtensa/boot/boot-redboot/Makefile @@ -19,7 +19,7 @@ boot-y := bootstrap.o OBJS := $(addprefix $(obj)/,$(boot-y)) LIBS := arch/xtensa/boot/lib/lib.a arch/xtensa/lib/lib.a -LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name) +LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name) zImage: vmlinux $(OBJS) $(LIBS) $(OBJCOPY) --strip-all -R .comment -R .xt.insn -O binary \ -- cgit v1.2.3