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authorSam Ravnborg <sam@neptun.(none)>2007-10-15 22:17:25 +0200
committerSam Ravnborg <sam@neptun.(none)>2007-10-15 22:17:25 +0200
commit06c5040cdb13d27adad118f2fbfae905a1911b37 (patch)
treee5e62e04ca2d6f834aed9925a13869f730656139 /Makefile
parent52bcc3308ae3344266f55bf98a22c1ac0201eda7 (diff)
downloadlinux-linaro-stable-06c5040cdb13d27adad118f2fbfae905a1911b37.tar.gz
kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP
The variable CPPFLAGS is a wellknown variable and the usage by kbuild may result in unexpected behaviour. This patch replace use of CPPFLAGS with KBUILD_CPPFLAGS all over the tree and enabling one to use: make CPPFLAGS=... to specify additional CPP commandline options. Patch was tested on following architectures: alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k, s390 Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile13
1 files changed, 7 insertions, 6 deletions
diff --git a/Makefile b/Makefile
index ad0add0fa7d4..ed65de7078c7 100644
--- a/Makefile
+++ b/Makefile
@@ -318,7 +318,7 @@ LINUXINCLUDE := -Iinclude \
$(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
-include include/linux/autoconf.h
-CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
+KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -fno-common \
@@ -334,7 +334,7 @@ export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
-export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
+export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
@@ -523,9 +523,10 @@ KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
# disable pointer signed / unsigned warnings in gcc 4.0
KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
-# Add user supplied AFLAGS and CFLAGS as the last assignments
-KBUILD_AFLAGS += $(AFLAGS)
-KBUILD_CFLAGS += $(CFLAGS)
+# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
+KBUILD_CPPFLAGS += $(CPPFLAGS)
+KBUILD_AFLAGS += $(AFLAGS)
+KBUILD_CFLAGS += $(CFLAGS)
# Use --build-id when available.
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
@@ -1507,7 +1508,7 @@ quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))
a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
- $(NOSTDINC_FLAGS) $(CPPFLAGS) \
+ $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
$(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
quiet_cmd_as_o_S = AS $@