| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 17/59] kbuild: use -Oz instead of -Os when using clang | Date | Wed, 21 Nov 2018 20:06:32 +0100 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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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,)
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