TononixOS/ubports_kernel_google_msm
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kbuild: enable 'make CFLAGS=...' to add additional options to CC

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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>
This commit is contained in:
Sam Ravnborg
2007-10-14 22:21:35 +02:00
parent 9a39e273d4
commit a0f97e06a4
46 changed files with 137 additions and 136 deletions
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6
arch/sparc/Makefile
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@@ -8,15 +8,15 @@
#
#
# Uncomment the first CFLAGS if you are doing kgdb source level
# Uncomment the first KBUILD_CFLAGS if you are doing kgdb source level
# debugging of the kernel to get the proper debugging information.
AS := $(AS) -32
LDFLAGS := -m elf32_sparc
CHECKFLAGS += -D__sparc__
#CFLAGS := $(CFLAGS) -g -pipe -fcall-used-g5 -fcall-used-g7
CFLAGS := $(CFLAGS) -m32 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7
#KBUILD_CFLAGS += -g -pipe -fcall-used-g5 -fcall-used-g7
KBUILD_CFLAGS += -m32 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7
AFLAGS := $(AFLAGS) -m32
#LDFLAGS_vmlinux = -N -Ttext 0xf0004000