From 49832c819ab85b33b7a2a1429c8d067e82be2977 Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Tue, 7 Sep 2021 15:42:02 -0700 Subject: Makefile: use -Wno-main in the full kernel tree When using gcc (SUSE Linux) 7.5.0 (on openSUSE 15.3), I see a build warning: kernel/trace/trace_osnoise.c: In function 'start_kthread': kernel/trace/trace_osnoise.c:1461:8: warning: 'main' is usually a function [-Wmain] void *main = osnoise_main; ^~~~ Quieten that warning by using "-Wno-main". It's OK to use "main" as a declaration name in the kernel. Build-tested on most ARCHes. [ v2: only do it for gcc, since clang doesn't have that particular warning ] Signed-off-by: Randy Dunlap Link: https://lore.kernel.org/lkml/20210813224131.25803-1-rdunlap@infradead.org/ Suggested-by: Steven Rostedt Suggested-by: Linus Torvalds Cc: Daniel Bristot de Oliveira Cc: Masahiro Yamada Cc: Michal Marek Cc: linux-kbuild@vger.kernel.org Signed-off-by: Linus Torvalds --- Makefile | 2 ++ 1 file changed, 2 insertions(+) (limited to 'Makefile') diff --git a/Makefile b/Makefile index d45fc2edf186..2d1e491f7737 100644 --- a/Makefile +++ b/Makefile @@ -802,6 +802,8 @@ else # Disabled for clang while comment to attribute conversion happens and # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=5,) +# gcc inanely warns about local variables called 'main' +KBUILD_CFLAGS += -Wno-main endif # These warnings generated too much noise in a regular build. -- cgit v1.2.3