| From foo@baz Wed Nov 21 18:50:25 CET 2018 |
| From: Behan Webster <behanw@converseincode.com> |
| Date: Mon, 27 Mar 2017 18:19:09 -0700 |
| Subject: kbuild: use -Oz instead of -Os when using clang |
| |
| From: Behan Webster <behanw@converseincode.com> |
| |
| commit 6748cb3c299de1ffbe56733647b01dbcc398c419 upstream. |
| |
| 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> |
| Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| Makefile | 3 ++- |
| 1 file changed, 2 insertions(+), 1 deletion(-) |
| |
| --- a/Makefile |
| +++ b/Makefile |
| @@ -644,7 +644,8 @@ KBUILD_CFLAGS += $(call cc-option,-fdata |
| 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,) |
