From: Arnd Bergmann <arnd@xxxxxxxx> The -Wnested-externs warning has become useless with gcc, since this warns every time that BUILD_BUG_ON() or similar macros are used. Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> --- scripts/Makefile.extrawarn | 3 +++ 1 file changed, 3 insertions(+) diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index 6baee1200615..9406f752e355 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -61,7 +61,10 @@ endif ifneq ($(findstring 2, $(KBUILD_EXTRA_WARN)),) KBUILD_CFLAGS += -Wdisabled-optimization +ifdef CONFIG_CC_IS_CLANG KBUILD_CFLAGS += -Wnested-externs +endif + KBUILD_CFLAGS += -Wshadow KBUILD_CFLAGS += $(call cc-option, -Wlogical-op) KBUILD_CFLAGS += -Wmissing-field-initializers -- 2.27.0
