The common error fount 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.
Cc: Michal Marek <mmarek@xxxxxxx>
Cc: linux-kbuild@xxxxxxxxxxxxxxx
Signed-off-by: Sergei Trofimovich <slyfox@xxxxxxxxxx>
---
Makefile | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Makefile b/Makefile
index 6e48848..eda0126 100644
--- a/Makefile
+++ b/Makefile
@@ -372,6 +372,8 @@ KBUILD_CPPFLAGS := -D__KERNEL__
KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -fno-common \
-Werror-implicit-function-declaration \
+ -Werror=implicit-int \
+ -Werror=strict-prototypes \
-Wno-format-security \
-fno-delete-null-pointer-checks
KBUILD_AFLAGS_KERNEL :=
--
1.8.3.2
--
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