Commit 5db0ac53 authored Mar 27, 2017 by Behan Webster Committed by Greg Hackmann Oct 16, 2017

UPSTREAM: kbuild: use -Oz instead of -Os when using clang



This generates smaller resulting object code when compiled with clang.

Signed-off-by: Behan Webster <behanw@converseincode.com>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
(cherry picked from commit 6748cb3c299de1ffbe56733647b01dbcc398c419)

parent 70de9b20

Makefile

+2 −1

Original line number	Diff line number	Diff line
		@@ -639,7 +639,8 @@ KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
		endif

		ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
		KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
		KBUILD_CFLAGS += $(call cc-option,-Oz,-Os)
		KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
		else
		ifdef CONFIG_PROFILE_ALL_BRANCHES
		KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)