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Re: linux 2.1.117 built with egcs-1.1 19980823
- To: "David B. Rees" <dbr at oto dot dyn dot ml dot org>
- Subject: Re: linux 2.1.117 built with egcs-1.1 19980823
- From: Andi Kleen <ak at muc dot de>
- Date: 24 Aug 1998 12:29:24 +0200
- Cc: egcs at cygnus dot com
- References: <XFMail.980823231525.dbr@oto.dyn.ml.org>
In article <XFMail.980823231525.dbr@oto.dyn.ml.org>,
"David B. Rees" <dbr@oto.dyn.ml.org> writes:
>> I did the same, but noticed a 50k increase of the image compared to
>> the same tree build with gcc 2.7.2.3. I'm not sure about the reasons
>> yet.
>>
>>
>> 2.7.2.3 options: -O2 -m486 -fno-strength-reduce -malign-loops=2
>> -malign-functions=2 -malign-jumps=2 -fomit-frame-pointer
>> egcs options: -O2 -mpentiumpro -fno-strength-reduce -fomit-frame-pointer
> Well, doesn't code optimized for the PPro end up being larger than code for the
> 486?
Does not make any difference at all. A -m486 compiled egcs kernel has the
same size as a -mpentiumpro kernel (both with explicit alignment settings)
-Andi