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gcov: shut up missing prototype warnings for internal stubs 

gcov uses global functions that are called from generated code, but these
have no prototype in a header, which causes a W=1 build warning:

kernel/gcov/gcc_base.c:12:6: error: no previous prototype for '__gcov_init' [-Werror=missing-prototypes]
kernel/gcov/gcc_base.c:40:6: error: no previous prototype for '__gcov_flush' [-Werror=missing-prototypes]
kernel/gcov/gcc_base.c:46:6: error: no previous prototype for '__gcov_merge_add' [-Werror=missing-prototypes]
kernel/gcov/gcc_base.c:52:6: error: no previous prototype for '__gcov_merge_single' [-Werror=missing-prototypes]

Just turn off these warnings unconditionally for the two files that
contain them.

Link: https://lore.kernel.org/all/0820010f-e9dc-779d-7924-49c7df446bce@linux.ibm.com/
Link: https://lkml.kernel.org/r/20230725123042.2269077-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Arnd Bergmann 2023-07-25 14:23:38 +02:00 committed by Andrew Morton
parent a53fb69baa
commit 29665c1e2a
1 changed files with 2 additions and 0 deletions
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2
kernel/gcov/Makefile
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@ -3,4 +3,6 @@ ccflags-y := -DSRCTREE='"$(srctree)"' -DOBJTREE='"$(objtree)"'
obj-y := base.o fs.o
obj-$(CONFIG_CC_IS_GCC) += gcc_base.o gcc_4_7.o
CFLAGS_gcc_base.o += -Wno-missing-prototypes -Wno-missing-declarations
obj-$(CONFIG_CC_IS_CLANG) += clang.o
CFLAGS_clang.o += -Wno-missing-prototypes -Wno-missing-declarations