As this option must have an argument, I think it should be mentioned in DEFAULT_WORD_SWITCH_TAKES_ARG. Why it works now, because the next argument after it is a temporary response file, 1st line of which is fresolution's argument. However, this looks ugly...
-- Summary: Add -fresolution to the list of switches that take arguments Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: driver AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: d dot g dot gorbachev at gmail dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43371