The FC3 .i386 rpms are built with
-O2 -g -pipe -m32 -march=i386 -mtune=pentium4
With one notable exception. i386.rpm glibc uses i486 instruction set (in order to support NPTL). Or at least there's rumor out there. FC3 system can't be installed on i386 machine even if you compile i386 kernel, if anybody still have any laying around. I don't know why RPM arch wasn't bumped to i486.rpm.
BTW, I saw some other distros replacing all i386 packages with i586. Red Hat/Fedora seems to take conservative approach whenever possible (glibc had to be compiled with i486 instructions, since NPTL was declared must-have for Fedora). Not sure why this conservative approach was choosen, since officially only i586 and higher are supported.
-- Aleksandar Milivojevic <amilivojevic@xxxxxx> Pollard Banknote Limited Systems Administrator 1499 Buffalo Place Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7
