From Fedora Project Wiki
I assume this needs a full rebuild of the world ? Might be worth pointing that out in 'Scope' - mclasen Added.
this will break the XO the geode CPU is i586 + cmov extention. rpm correctly refuses to install i686 rpms onto the system. currently the os shipped by OLPC has i686 glibc and openssl rpms installed but you can not update them. they only get on because the host that builds images is capable of installing them. - ausil (dgilmore)
If you are dropping support for i586 CPUs, why is the default -march for 32-bit i586 instead of i686?