When support for a 64-bit windows platform was initially created, there was not yet a consensus on the proper nomenclature. "mingw64" appeared at one time, but has since been deprecated. The following patch should remove that in at lease one place, although it should be removed from any place.
Index: configure.ac =================================================================== --- configure.ac (revision 132211) +++ configure.ac (working copy) @@ -1013,9 +1013,6 @@ case "${host}" in *-mingw32*) host_makefile_frag="config/mh-mingw" ;; - *-mingw64*) - host_makefile_frag="config/mh-mingw" - ;; *-interix*) host_makefile_frag="config/mh-interix" ;; -- Summary: mingw64 is an invalid name Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: other AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: nightstrike at gmail dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35151