This configure option should (I would think) be documented in gccinstall.texi. It isn't.
The original patch (http://gcc.gnu.org/ml/gcc-patches/2006-08/msg00614.html) does not contain any documentation. -- Summary: --enable-stage1-langauges configure option is not documented. Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: brooks at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30635