I think what the poster means is "If the Linux kernel, and possibly some other applications provided by a Gnu/Linux distribution provider(Suse), have been configured and built with 'i586' options, should there be any problems with using a gcc configured and built with 'i686' options, or the programs built using that compiler?" My limited knowledge says there should not be a problem, just because the _kernel_ is set not to use MMX instructions doesn't mean a compiled program cannot do so, AFAIK , if this is not the case I'd like to know too! I have built my own GCC using such options and have built my own applications using processor-specific options using the rsulting GCC, for a number of GCC versions since 3 up to and including 4.2 , on a system in which virtually everything else is stock SUSE 10.0 or previously RedHat 7.2, and so far I have not encountered any problems. Disclaimer, I am not part of the gcc development team and my advice is worth what you paid for it, is not covered by a warranty and is not an official confirmation of anything ;-6 > -----Original Message----- > From: gcc-help-owner@xxxxxxxxxxx > [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Andrew Haley > Sent: 06 June 2007 09:56 > To: Ахметов Казбек > Cc: gcc-help@xxxxxxxxxxx > Subject: Re: i686-gcc vs i586-Suse Linux > > ??????? ?????? writes: > > > ?ould you give me a confirmation that: > > > 'The installation of the 'i686' gcc is compatable with the 'i586' > > version of Suse Linux' ? > > I don't really understand why you're asking this. If you have a i586 > system, why not configure gcc for the i586 ? > > The most significant difference between i586 (Pentium) and i686 > (Pentium Pro) from gcc's point of view is MMX instructions. > > Andrew. >
