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

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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)
This commit is contained in:
Behan Webster
2017-03-27 18:19:09 -07:00
committed by Greg Hackmann
parent 70de9b20fa
commit 5db0ac53e7
1 changed files with 2 additions and 1 deletions
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Makefile
+2 -1
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@@ -639,7 +639,8 @@ KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
endif endif
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 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 else
ifdef CONFIG_PROFILE_ALL_BRANCHES ifdef CONFIG_PROFILE_ALL_BRANCHES
KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)