Andrew Gaydenko wrote: >>> The question is: must I replace '-march=nocona' with '-mtune=native and >>> -march=native'? >> I have a Core2 Duo E6600 and use these CFLAGS with GCC 4.2: >> >> CFLAGS="-Os -march=native -mtune=native -fomit-frame-pointer -pipe -mmmx >> -msse2 -msse3" >> >> Native works fine here. > > Kenneth, thanks! I'll try your flags-string. I hope, there aren't any > resons to rebuld anything else after switching form 4.1.2 with curennt > flags to 4.2.0 with youe flags. Is it true?
Personally I rebuilt everything on my system because I wanted everything to be compiled under my shiny new toolchain. I accomplished it via this: # emerge -eav system # emerge -eav world However, I don't believe you _have_ to rebuild. GCC 4.1 and 4.2 should be binary compatible. I know that my GCC 4.1 LibTorrent works fine with a GCC 4.2 built rtorrent, so I would like to say it should work fine. -- Kenneth Prugh - Ken69267 Gentoo AMD64 Arch Tester
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