From: Matthias Kaehlcke <mka@chromium.org>
To: Michal Marek <mmarek@suse.com>
Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
Behan Webster <behanw@converseincode.com>,
Greg Hackmann <ghackmann@google.com>,
Grant Grundler <grundler@chromium.org>,
Michael Davidson <md@google.com>,
Peter Foley <pefoley2@pefoley.com>,
Matthias Kaehlcke <mka@chromium.org>
Subject: [PATCH] kbuild: use -Oz instead of -Os when using clang
Date: Mon, 27 Mar 2017 18:19:09 -0700 [thread overview]
Message-ID: <20170328011909.150513-1-mka@chromium.org> (raw)
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
next reply other threads:[~2017-03-28 1:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-28 1:19 Matthias Kaehlcke [this message]
2017-03-30 16:03 ` Masahiro Yamada
2017-03-30 16:41 ` Matthias Kaehlcke
2017-03-30 17:57 ` Masahiro Yamada
2017-04-10 18:08 ` Matthias Kaehlcke
2017-04-12 3:38 ` Masahiro Yamada
2017-04-12 20:39 ` Masahiro Yamada
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170328011909.150513-1-mka@chromium.org \
--to=mka@chromium.org \
--cc=behanw@converseincode.com \
--cc=ghackmann@google.com \
--cc=grundler@chromium.org \
--cc=linux-kbuild@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=md@google.com \
--cc=mmarek@suse.com \
--cc=pefoley2@pefoley.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®