> Meanwhile is does the patch look ok? No, the current wording is just fine and yours doesn't bring anything (even the contrary, since you're listing known problematic versions). This will also break http://gcc.gnu.org/install/specific.html#sparc-x-x
I don't see why we should special case GMP, MPFR and MPC here, look at all the other dependencies on http://gcc.gnu.org/install/prerequisites.html And IIUC the real issue is that ftp://gcc.gnu.org/pub/gcc/infrastructure/ contains obsolete versions. -- Eric Botcazou