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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 /scripts | |
| 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 'scripts')
| -rw-r--r-- | scripts/Kbuild.include | 6 | ||||
| -rw-r--r-- | scripts/Makefile.lib | 2 |
2 files changed, 4 insertions, 4 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 677bc6c175cb..b1a7c7d42e15 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -75,7 +75,7 @@ try-run = $(shell set -e; \ # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) as-option = $(call try-run,\ - $(CC) $(CFLAGS) $(1) -c -xassembler /dev/null -o "$$TMP",$(1),$(2)) + $(CC) $(KBUILD_CFLAGS) $(1) -c -xassembler /dev/null -o "$$TMP",$(1),$(2)) # as-instr # Usage: cflags-y += $(call as-instr,instr,option1,option2) @@ -87,12 +87,12 @@ as-instr = $(call try-run,\ # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) cc-option = $(call try-run,\ - $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",$(1),$(2)) + $(CC) $(KBUILD_CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",$(1),$(2)) # cc-option-yn # Usage: flag := $(call cc-option-yn,-march=winchip-c6) cc-option-yn = $(call try-run,\ - $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",y,n) + $(CC) $(KBUILD_CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",y,n) # cc-option-align # Prefix align with either -falign or -malign diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index e6ce7b107e49..51ae412929a0 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -84,7 +84,7 @@ basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))" modname_flags = $(if $(filter 1,$(words $(modname))),\ -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))") -_c_flags = $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$(basetarget).o) +_c_flags = $(KBUILD_CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$(basetarget).o) _a_flags = $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) _cpp_flags = $(CPPFLAGS) $(EXTRA_CPPFLAGS) $(CPPFLAGS_$(@F)) |