On an up to date Fedora Core 4 system, with the latest update from svn today cc1 --help segfaults.
The configure conmmand line was: ../gcc/configure --enable-languages=c --disable-checking --disable-nls --enable-gather-detailed-mem-stats --prefix=${HOME}/build/gcc-HEAD A gdb session: Starting program: /home/dann/build/gcc-HEAD/libexec/gcc/i686-pc-linux-gnu/4.2.0/cc1 --help Reading symbols from shared object read from target memory...done. Loaded system supplied DSO at 0xa7e000 The following options are language-independent: Program received signal SIGSEGV, Segmentation fault. 0x082bee9d in print_filtered_help (flag=536870912) at ../../gcc/gcc/opts.c:1335 1335 memset (printed, 0, cl_options_count); (gdb) bt #0 0x082bee9d in print_filtered_help (flag=536870912) at ../../gcc/gcc/opts.c:1335 #1 0x082c0147 in decode_options (argc=2, argv=0xbfac53c4) at ../../gcc/gcc/opts.c:1284 #2 0x083175a9 in toplev_main (argc=2, argv=0xbfac53c4) at ../../gcc/gcc/toplev.c:1970 #3 0x0809e2bf in main (argc=134857264, argv=0x219) at ../../gcc/gcc/main.c:35 -- Summary: cc1 --help segfaults Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dann at godzilla dot ics dot uci dot edu GCC host triplet: i686-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26249