On Wed, Apr 9, 2008 at 10:44 AM, RW wrote: > On Tue, 8 Apr 2008 13:14:45 -0700 David Allen wrote: > > > The advice I've read in several posts on the subject involve > > everything from setting one, setting both, to ignoring both, > > sometimes with the =? notation and sometimes without. And then, I've > > read comments that suggest when compiling the kernel, for example, > > both are ignored, and default values (tucked away somewhere) are > > always applied. IIRC, the handbook recommends at least setting > > CPUTYPE. > > Avoid setting CFLAGS unless you have a good reason - Gentoo > documentation has a lot to answer for. CPUTYPE causes "-march" to be > applied, so it can affect compatibility. AFAIK both setting do affect > world and kernel because CFLAGS can cause a build to fail, and I've > seen matching march settings in kernel builds. > > > Or are those settings relevant to the > > compilation process only? Or to both the compilation process and the > > actual performance of the binary? > > It can be either, -O2 is related to execution, -pipe speeds-up > compilation.
Thank you for your reply. It's starting to make a lot more sense. Just to confirm, then, if there's no CPUTYPE set, I can then set up a build server on an Opteron box, for example, to build world, kernel and ports binaries that can then be installed on my Thinkpad or a PIII box? _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
