libdrm-2.4.15-4.fc12.src.rpm Failed To Build From Source against the rawhide tree. See http://fedoraproject.org/wiki/FTBFS for more information.
Setting to ASSIGNED per Fedora Bug Triage workflow. https://fedoraproject.org/wiki/BugZappers/BugStatusWorkFlow
Created attachment 371895 [details] root.log root.log for i386
Created attachment 371896 [details] build.log build.log for i386
Created attachment 371897 [details] mock.log mock.log for i386
checking for native atomic primitives... none Yeah, that's not good. Don't know what the difference is between your build and mine, works here.
I rebuilt libdrm-2.4.15-5.fc12 in a scratch build in koji and it works fine, so I'm going to say this is a failure of your build setup.