path: root/Makefile
diff options
authorMichal Marek <>2011-05-02 12:51:15 +0200
committerMichal Marek <>2011-05-03 10:50:54 +0200
commit8417da6f2128008c431c7d130af6cd3d9079922e (patch)
tree79bfdaadfc1548826651b9b0378e70e60cdc7720 /Makefile
parentbffd2020a972a188750e5cf4b9566950dfdf25a2 (diff)
kbuild: Fix passing -Wno-* options to gcc 4.4+
Starting with 4.4, gcc will happily accept -Wno-<anything> in the cc-option test and complain later when compiling a file that has some other warning. This rather unexpected behavior is intentional as per, so work around it by testing for support of the opposite option (without the no-). Introduce a new Makefile function cc-disable-warning that does this and update two uses of cc-option in the toplevel Makefile. Reported-and-tested-by: Stephen Rothwell <> Signed-off-by: Michal Marek <>
Diffstat (limited to 'Makefile')
1 files changed, 2 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index bc9eae424af8..5cf4eb03fb3e 100644
--- a/Makefile
+++ b/Makefile
@@ -569,7 +569,7 @@ endif
# This warning generated too much noise in a regular build.
# Use make W=1 to enable this warning (see scripts/
-KBUILD_CFLAGS += $(call cc-option, -Wno-unused-but-set-variable)
+KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
@@ -616,7 +616,7 @@ CHECKFLAGS += $(NOSTDINC_FLAGS)
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,)
+KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
# disable invalid "can't wrap" optimizations for signed / pointers
KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)