On Fri, Nov 16, 2018 at 03:54:18PM +0800, Qu Wenruo wrote: > We imported cc-option but forgot to import cc-disable-warning. > > Fixes: b556a992c3ad ("btrfs-progs: build: allow to build with various > compiler warnings") > Signed-off-by: Qu Wenruo <w...@suse.com> > --- > Makefile.extrawarn | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/Makefile.extrawarn b/Makefile.extrawarn > index 1f4bda94a167..5849036fd166 100644 > --- a/Makefile.extrawarn > +++ b/Makefile.extrawarn > @@ -19,6 +19,12 @@ try-run = $(shell set -e; \ > cc-option = $(call try-run,\ > $(CC) $(CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2)) > > +# cc-disable-warning > +# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable) > +cc-disable-warning = $(call try-run,\ > + $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -W$(strip $(1)) -c > -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
btrfs-progs don't use KBUILD_CPPFLAGS nor CC_OPTION_CFLAGS so this needs to be properly ported from kernel.