https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85007
--- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > The gcc configure line was taken directly from the Debian distribution > package build script. Distros frequently allow having multiple versions of > gcc installed, and give them the appropriate extension via the > "--program-suffix" argument to the configure command. I don't see --program-suffix in your configure line though.