[PATCH] kbuild: use -Oz instead of -Os when using clang

From	Matthias Kaehlcke <mka@chromium.org>
Newsgroups	linux.kernel
Subject	[PATCH] kbuild: use -Oz instead of -Os when using clang
Date	2017-03-28 03:20 +0200
Message-ID	<tpNXI-8w9-13@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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This generates smaller resulting object code when compiled with clang.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
---
 Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index b2faa9319372..66bcdbf58371 100644
--- a/Makefile
+++ b/Makefile
@@ -638,7 +638,8 @@ 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,)
-- 
2.12.2.564.g063fe858b8-goog

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[PATCH] kbuild: use -Oz instead of -Os when using clang Matthias Kaehlcke <mka@chromium.org> - 2017-03-28 03:20 +0200
  Re: [PATCH] kbuild: use -Oz instead of -Os when using clang Masahiro Yamada <yamada.masahiro@socionext.com> - 2017-03-30 18:10 +0200
    Re: [PATCH] kbuild: use -Oz instead of -Os when using clang Matthias Kaehlcke <mka@chromium.org> - 2017-03-30 18:50 +0200
      Re: [PATCH] kbuild: use -Oz instead of -Os when using clang Masahiro Yamada <yamada.masahiro@socionext.com> - 2017-03-30 20:00 +0200

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