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To: "Martin Eriksson" <nitrax@giron.wox.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [ACPI] ACPI mentioned on lwn.net/kernel
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From: Andi Kleen <ak@suse.de>
Date: 26 Jan 2002 23:43:42 +0100
In-Reply-To: "Martin Eriksson"'s message of "26 Jan 2002 17:43:03 +0100"
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"Martin Eriksson" <nitrax@giron.wox.org> writes:

> -CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
> +CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
>           -fomit-frame-pointer -fno-strict-aliasing -fno-common
>  AFLAGS := -D__ASSEMBLY__ $(CPPFLAGS)

You should remove the -malign-* options in arch/i386/Makefile too.
Most of -Os win normally comes from doing less aggressive padding,
but the kernel overrides this.

Also gcc 3.0 and gcc 3.1-snapshots should be somewhat better at 
implementing -Os. 

-Andi