From: Yoshinori Sato <ysato@users.sourceforge.jp>
To: Adrian Bunk <bunk@fs.tum.de>
Cc: linux kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [2.6 patch] add a config option for -Os
Date: Tue, 26 Aug 2003 23:41:09 +0900 [thread overview]
Message-ID: <m2ekz8eb22.wl%ysato@users.sourceforge.jp> (raw)
In-Reply-To: <20030825224717.GZ7038@fs.tum.de>
At Tue, 26 Aug 2003 00:47:17 +0200,
Adrian Bunk wrote:
>
> The patch below adds a config option for compiling the kernel with -Os.
>
> Compared to the last patch, the option moved to the embedded to the
> General Setup menu and depends on EXPERIMENTAL instead of EMBEDDED
> (retionale: it might even produce a faster kernel but it's less tested).
>
> I removed the special cases in the arm, arm26 and h8300 Makefiles, users
> on these architectures can now use OPTIMIZE_FOR_SIZE.
>
> Compiling with this option enabled produced a working kernel for me on
> i386.
>
An idea do not change -O2, and to add specification of -Os to with "OPTIMIZE_SIZE" ?
If there are a few the ones, degradation of speed means.
vmlinux size of h8300
-O2 -Os -O2&-Os
.text 561200 554368 555088
.data 59148 58612 58868
.bss 45244 45260 45244
total 665592 658240 659200
--
Yoshinori Sato
<ysato@users.sourceforge.jp>
next prev parent reply other threads:[~2003-08-26 14:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-25 22:47 [2.6 patch] add a config option for -Os Adrian Bunk
2003-08-26 14:41 ` Yoshinori Sato [this message]
2003-08-26 14:58 ` Valdis.Kletnieks
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