diff options
authorSergei Trofimovich <slyfox@gentoo.org>2013-09-13 14:51:40 -0700
committerMichal Marek <mmarek@suse.cz>2013-10-23 16:36:57 +0200
commit80970472179a45609c0b11b80619bc8c32b15f77 (patch)
parent272b98c6455f00884f0350f775c5342358ebb73f (diff)
Makefile: enable -Werror=implicit-int and -Werror=strict-prototypes by default
The common error found in forward-ported/backported patches is missing headers. One recent example (files and function names are mangled): void foo(){} EXPORT_SYMBOL(foo); gave only warning foo.c:12345678:5: warning: function declaration isn't a prototype [-Wstrict-prototypes] void foo(){} ^ foo.c:12345679:5: warning: data definition has no type or storage class [enabled by default] EXPORT_SYMBOL(foo); foo.c:12345679:5: warning: type defaults to 'int' in declaration of 'EXORT_SYMBOL' [-Werror=implicit-int] Now it's a fatal error. Tested on x86_64 allyesconfig. [akpm@linux-foundation.org: fix typos in comments] Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
1 files changed, 6 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index de004ceb6b5..c060363f11c 100644
--- a/Makefile
+++ b/Makefile
@@ -659,6 +659,12 @@ KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
# conserve stack if available
KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
+# disallow errors like 'EXPORT_GPL(foo);' with missing header
+KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
+# require functions to have arguments in prototypes, not empty 'int foo()'
+KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
# use the deterministic mode of AR if available
KBUILD_ARFLAGS := $(call ar-option,D)