There is no option to turn off the use of precompiled headers. This makes generating preprocessed source for bugs harder than necessary (you need to manually remove the pchs).
-- Summary: Option to turn off usage of any precompiled header Product: gcc Version: 4.4.0 Status: UNCONFIRMED Severity: enhancement Priority: P3 Component: preprocessor AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: rguenth at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38013