When i compiled emacs(22.0.50.3) with gcc-4.2, emacs meta key doesn't functioning..
> cc -v Using built-in specs. Target: i686-pc-linux-gnu Configured with: ../gcc/configure --prefix=/usr --libexecdir=/usr/lib --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --enable-languages=c,c++,treelang Thread model: posix gcc version 4.2.0 20060603 (experimental) -- Summary: emacs M-x is undefined Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: happyarch at gmail dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27909