http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46102
--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> 2010-12-09 10:40:19 UTC --- GDB gives maybe better backtrace: Program received signal SIGSEGV, Segmentation fault. break_out_includes (filename=<value optimized out>) at /usr/portage/distfiles/svn-src/gcc/trunk/gcc/dwarf2out.c:9818 9818 unit = pop_compile_unit (unit); (gdb) bt #0 break_out_includes (filename=<value optimized out>) at /usr/portage/distfiles/svn-src/gcc/trunk/gcc/dwarf2out.c:9818 #1 dwarf2out_finish (filename=<value optimized out>) at /usr/portage/distfiles/svn-src/gcc/trunk/gcc/dwarf2out.c:23110 #2 0x0000000000a21566 in compile_file (argc=15, argv=0x7fffffffdaa8) at /usr/portage/distfiles/svn-src/gcc/trunk/gcc/toplev.c:621 #3 do_compile (argc=15, argv=0x7fffffffdaa8) at /usr/portage/distfiles/svn-src/gcc/trunk/gcc/toplev.c:1874 #4 toplev_main (argc=15, argv=0x7fffffffdaa8) at /usr/portage/distfiles/svn-src/gcc/trunk/gcc/toplev.c:1937 #5 0x00007ffff6586bbd in __libc_start_main () from /lib/libc.so.6 #6 0x00000000004fdc6d in _start () I don't know if this belongs to "debug" or "pch".