Subject: + makefile-enable-werror=implicit-int-and-werror=strict-prototypes-by-default.patch added to -mm tree
To: slyfox@xxxxxxxxxx,mmarek@xxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 15 Aug 2013 14:17:43 -0700
The patch titled
Subject: Makefile: enable -Werror=implicit-int and -Werror=strict-prototypes by default
has been added to the -mm tree. Its filename is
makefile-enable-werror=implicit-int-and-werror=strict-prototypes-by-default.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/makefile-enable-werror=implicit-int-and-werror=strict-prototypes-by-default.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/makefile-enable-werror=implicit-int-and-werror=strict-prototypes-by-default.patch
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------------------------------------------------------
From: Sergei Trofimovich <slyfox@xxxxxxxxxx>
Subject: Makefile: enable -Werror=implicit-int and -Werror=strict-prototypes by default
A common error type 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 fata error. Tested on x86_64 allyesconfig.
Signed-off-by: Sergei Trofimovich <slyfox@xxxxxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Makefile | 5 +++++
1 file changed, 5 insertions(+)
diff -puN Makefile~makefile-enable-werror=implicit-int-and-werror=strict-prototypes-by-default Makefile
--- a/Makefile~makefile-enable-werror=implicit-int-and-werror=strict-prototypes-by-default
+++ a/Makefile
@@ -374,6 +374,11 @@ KBUILD_CFLAGS := -Wall -Wundef -Wstric
-Werror-implicit-function-declaration \
-Wno-format-security \
-fno-delete-null-pointer-checks
+
+# not universally available, but nice to have ones
+KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) \
+ $(call cc-option,-Werror=strict-prototypes)
+
KBUILD_AFLAGS_KERNEL :=
KBUILD_CFLAGS_KERNEL :=
KBUILD_AFLAGS := -D__ASSEMBLY__
_
Patches currently in -mm which might be from slyfox@xxxxxxxxxx are
makefile-enable-werror=implicit-int-and-werror=strict-prototypes-by-default.patch
cleanup-add-forward-declarations-for-inplace-syscall-wrappers.patch
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