http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56523
Bug #: 56523 Summary: -Wunitialized is described to be enabled -Wall Classification: Unclassified Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassig...@gcc.gnu.org ReportedBy: corentinja...@gmail.com The online docs ( http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html ) and the gcc 4.7 man page state incorrectly that -Wall enable -Wunitialized. The docs also state -Wunitialized is enable by -Wextra, and that is the observed and correct behaviour.