I think the proper gcc -march flag for amd64 would be -march=k8. At least that is what I use in my /etc/make.conf for all my amd64 gentoo servers at work. My gentoo box that I run eqemu on is an old 1 Gig athlon-tbird. I make sure to change all of the makefiles to reflect this by switching -march=i686 to -march=athon-tbird and -O to -O2. The same settings that I use in make.conf. I also make sure to remove the -pg flags while I am in the makefiles. I have yet to have a compile error "knock no wood"...
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-- Keelyeh Owner, ServerOp and Developer Jest 4 Server
Linux (Jest3 runs on Fedora, our Dev servers usually run on Ubuntu and/or Gentoo), OC-12 Connection = Hella Fast
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