https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107998
--- Comment #4 from Christophe Lyon <clyon at gcc dot gnu.org> --- Indeed my patch aimed at catching such inconsistencies. I guess before that the build had a 'strange' behavior? (with a missing dirname, some parts of the shell genmultilib shell script would expand into empty values, probably leading to unintended behaviour)
