https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61812
--- Comment #3 from dhowells at redhat dot com <dhowells at redhat dot com> --- Hmmm... It appears you're right. The 'upstream tarball' in the Fedora gcc SRPM seems already to be altered from what's upstream - even before the spec file applies any patches to it. I wonder where it is coming from.