David W Noon schrieb: > You need to consider CHOST as well, to ensure you make the most of the > newer CPUs. > > Here is what I use on an E6600 machine: > > CHOST="x86_64-pc-linux-gnu" > CFLAGS="-march=nocona -mmmx -m3dnow -msse -msse2 -msse3 -mfpmath=sse,387 -O2 > -pipe" > > Note that -fomit-frame-pointer is not applicable on AMD64/EM64T hardware > platforms; it will be silently ignored by GCC. Most of the additional > processor features I have specified (MMX, SSE/2/3, 3DNow!) are actually > implied by the -march=nocona, but I specify as a mnemonic to myself > that these are [potentially] in use on this box. > > If you simply restored from a Pentium 4 system you will need to take the > steps to change the CHOST. This is documented on the Gentoo web site.
Phew, this scares me ;) I use CHOST="i686-pc-linux-gnu" now, and don't want to go 64bit anyway (at least not in the near future), so I think will just edit the CFLAGS for a start and re-emerge system, then world? Or is it preferable to really change that CHOST even when running a 32bit system? (I have a E6600 as well as my main workstation ... this would apply there also) Thanks for any tips on this, I am rather defensive when it comes to change these essential settings. Stefan -- [EMAIL PROTECTED] mailing list
