Your package gmp-ecm failed to build from source in current rawhide.
NOTE: build logs are cleaned up after 1 week
For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild
Bug or new behavior in GCC? This is now failing in %check (builds fine), wasn't before F-19 rebuild.
It turns out that ECM uses some knowledge of GMP internals, and that GMP 5.1 invalidated some of that knowledge. I've plucked a couple of patches out of upstream's subversion repository to fix the problem. I'll push a build shortly.
Cool, thanks Jerry.