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Re: -march=i686 on i686 ?!?
- To: gcc at gcc dot gnu dot org, pcarlini at unitus dot it, tprince at computer dot org
- Subject: Re: -march=i686 on i686 ?!?
- From: dewar at gnat dot com
- Date: Wed, 4 Jul 2001 17:09:30 -0400 (EDT)
- Cc: dnovillo at redhat dot com
<<1. People run benchmarks with one set of compiler flags, which may or may not h
ave been appropriate for some combination of
hardware and gcc version at one time. They tend not to adapt to changes in comp
ilers which would make new choices desirable.
>>
Note that such changes in the flags really need to be VERY well documented,
or they may well give an impression of poorer performance. Users of a
compiler tend to have set scripts to compile, and it takes quite a kick
to get them to review the set of switches etc.