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-mcpu vs -march
- To: gnu-win32@cygnus.com
- Subject: -mcpu vs -march
- From: Bob Firth <firth@troika.demon.co.uk>
- Date: Wed, 17 Feb 1999 13:53:46 +0000 (GMT)
- Delivered-To: listarch-cygwin@sourceware.cygnus.com
- Delivered-To: mailing list cygwin@sourceware.cygnus.com
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I'm using mingw32 on Intel. I was wondering what is the difference
between using, say, -mcpu=pentium and -march=pentium. The skimpy
documentation I have implies that the code generated using -march may not
run on all i386 architecture cpu's, whereas using -mcpu it will run
everywhere, if not at its most efficient. Is this correct?
Bearing in mind the software will run on a variety of different machines
(pentium onwards), what is the best compromise of cpu to compile for?
What about the AMD K6 ?
--
Bob Firth <firth@troika.demon.co.uk>
Troika Associates Limited
Nash House, 28 Church Road, Tunbridge Wells, Kent TN1 1JP, UK
Phone: +44-1892-543373 Fax: +44-1892-545585
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