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How to tune gcc for different x86 host and target cpus?
- From: Michael Roth <mroth at nessie dot de>
- To: gcc-help at gcc dot gnu dot org
- Date: Fri, 23 Apr 2004 13:48:41 +0200
- Subject: How to tune gcc for different x86 host and target cpus?
Hello,
as far as I understand, when building gcc, I can use --with-arch=pentium
to tell configure that the resulting compiler should emit code optimized
for pentium processors.
But how can I tell the configure script that the compiler itself should
be optimized for a different cpu architecture?
Example #1: Host and build are athlon-xp, target should be pentium.
Example #2: Build is pentium4, Host should be pentium-mmx, target should
be 386.
What configure options should I use? (Host, build and target are all
linux systems, but I think this apply to every system with x86 processor
variants?)
Michael Roth