When compiling a file with the `-Wuninitialized' flag, but without `-O', one does not get a warning from GCC 4.5.1 (and `-Wuninitialized' has no effect).
GCC should output something like `cc1.exe: warning: -Wuninitialized is not supported without -O', like GCC 3.4.5 did. -- Summary: gcc does not warn about missing `-O' flag when specifying `-Wuninitialized' Product: gcc Version: 4.5.1 Status: UNCONFIRMED Severity: critical Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: jellegeerts at gmail dot com GCC host triplet: mingw32 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45468