cazy <ad319min@xxxxxxxxx> writes: > I've tried to use gdb to debug cc1 ( gcc 4.5.0) > > as fellow: > > (gdb) file ./cc1 > (gdb) run -I /usr/include /cazy/add.c > my problem is that ,when I creat the break point > > (gdb) break main it worked well (gcc/main.c) > > but > (gdb) break do_compile, it says Function "do_compile" not defined. > (gcc/toplev.c) > > so i tried to break another function toplev_main() in the same source file > (gdb) break toplev_main it worked (gcc/toplev.c) > > so I am confused, Is the function only with "extern" could be "break"? Probably the compiler was built with optimization, as is the default. Probably the optimizer inlined do_compile into its caller, so that it does not exist in the executable, and therefore you can not set a breakpoint on it. Ian
