releases/4.4.165/kbuild-use-oz-instead-of-os-when-using-clang.patch

   1 From foo@baz Wed Nov 21 18:50:39 CET 2018
   2 From: Behan Webster <behanw@converseincode.com>
   3 Date: Mon, 27 Mar 2017 18:19:09 -0700
   4 Subject: kbuild: use -Oz instead of -Os when using clang
   5
   6 From: Behan Webster <behanw@converseincode.com>
   7
   8 commit 6748cb3c299de1ffbe56733647b01dbcc398c419 upstream.
   9
  10 This generates smaller resulting object code when compiled with clang.
  11
  12 Signed-off-by: Behan Webster <behanw@converseincode.com>
  13 Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
  14 Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
  15 [nc: Adjust context due to lack of commit a76bcf557ef4 in linux-4.4.y]
  16 Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
  17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  18 ---
  19  Makefile |    2 +-
  20  1 file changed, 1 insertion(+), 1 deletion(-)
  21
  22 --- a/Makefile
  23 +++ b/Makefile
  24 @@ -628,7 +628,7 @@ KBUILD_CFLAGS       += $(call cc-disable-warni
  25  KBUILD_CFLAGS  += $(call cc-disable-warning, attribute-alias)
  26
  27  ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  28 -KBUILD_CFLAGS  += -Os
  29 +KBUILD_CFLAGS  += $(call cc-option,-Oz,-Os)
  30  else
  31  ifdef CONFIG_PROFILE_ALL_BRANCHES
  32  KBUILD_CFLAGS  += -O2