From: Mickaël Salaün <mic@xxxxxxxxxxx> commit de3ee3f63400a23954e7c1ad1cb8c20f29ab6fe3 upstream. This change enables to extend CFLAGS and LDFLAGS from command line, e.g. to extend compiler checks: make USERCFLAGS=-Werror USERLDFLAGS=-static USERCFLAGS and USERLDFLAGS are documented in Documentation/kbuild/makefiles.rst and Documentation/kbuild/kbuild.rst This should be backported (down to 5.10) to improve previous kernel versions testing as well. Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Mickaël Salaün <mic@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20220909103901.1503436-1-mic@xxxxxxxxxxx Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/testing/selftests/lib.mk | 5 +++++ 1 file changed, 5 insertions(+) --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -130,6 +130,11 @@ endef clean: $(CLEAN) +# Enables to extend CFLAGS and LDFLAGS from command line, e.g. +# make USERCFLAGS=-Werror USERLDFLAGS=-static +CFLAGS += $(USERCFLAGS) +LDFLAGS += $(USERLDFLAGS) + # When make O= with kselftest target from main level # the following aren't defined. #
