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authorMichal Marek <mmarek@suse.cz>2015-07-01 17:19:30 +0200
committerVineet Gupta <vgupta@synopsys.com>2015-07-06 11:09:00 +0530
commit61754c18752ffb78145671e94f053fb202fff041 (patch)
tree30468e47109348f877c50a8c2ae176cd735ad5e7 /Makefile
parentb607eddd7122595bbcf49c00192faf3e49b142d3 (diff)
downloadlinux-linaro-stable-61754c18752ffb78145671e94f053fb202fff041.tar.gz
kbuild: Allow arch Makefiles to override {cpp,ld,c}flags
Since commit a1c48bb1 (Makefile: Fix unrecognized cross-compiler command line options), the arch Makefile is included earlier by the main Makefile, preventing the arc architecture to set its -O3 compiler option. Since there might be more use cases for an arch Makefile to fine-tune the options, add support for ARCH_CPPFLAGS, ARCH_AFLAGS and ARCH_CFLAGS variables that are appended to the respective kbuild variables. The user still has the final say via the KCPPFLAGS, KAFLAGS and KCFLAGS variables. Reported-by: Vineet Gupta <Vineet.Gupta1@synopsys.com> Cc: stable@vger.kernel.org # 3.16+ Signed-off-by: Michal Marek <mmarek@suse.com>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile9
1 files changed, 5 insertions, 4 deletions
diff --git a/Makefile b/Makefile
index 13270c0a9336..8c31fbc90589 100644
--- a/Makefile
+++ b/Makefile
@@ -780,10 +780,11 @@ endif
include scripts/Makefile.kasan
include scripts/Makefile.extrawarn
-# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
-KBUILD_CPPFLAGS += $(KCPPFLAGS)
-KBUILD_AFLAGS += $(KAFLAGS)
-KBUILD_CFLAGS += $(KCFLAGS)
+# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
+# last assignments
+KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
+KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
+KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
# Use --build-id when available.
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\