[RFA] Fix gdb/277 by separating types

[Michael Elizabeth Chastain]

I do build an object directory from scratch (just to avoid these
kinds of problems).

BTW I am using gcc 2.95.3, I don't know where you got 2.95.2 from.

I bet the difference in our machines is somewhere in libc.
I am using stock red hat linux 7.2 glibc, glibc 2.2.4-13.

It's reproducing on my machine.  Here's a shorter recipe:

  ./gdb gdb.base/break
  (gdb) break main
  (gdb) run
  (gdb) maint print symbols symbols_output

Have a look at the end of symbols_output in the tarball.
Mine is reproducibly crapping out in file 'init.c' here:

   typedef void (*__gconv_end_fct)();
   typedef int (*__gconv_fct)();
   struct __gconv_info {
       size_t __nsteps;
       struct __gconv_step *__steps;
       struct __gconv_step_data __data[0];
   };

   typedef int (*__gconv_init_fct)();
   struct __gconv_step {

When I do maint-print-symbols with gdb 5.2, it runs fine,
and gives me this output for __gconv_step:

   typedef int (*__gconv_init_fct)(struct __gconv_step *);
   struct __gconv_step {
       struct __gconv_loaded_object *__shlib_handle;
       const char *__modname;
       int __counter;
       char *__from_name;
       char *__to_name;
       int (*__fct)(struct __gconv_step *, struct __gconv_step_data *, const unsigned char **, const unsigned char *, unsigned char **, size_t *, int, int);
       int (*__init_fct)(struct __gconv_step *);
       void (*__end_fct)(struct __gconv_step *);
       int __min_needed_from;
       int __max_needed_from;
       int __min_needed_to;
       int __max_needed_to;
       int __stateful;
       void *__data;
   };

In the stack trace, I'm seeing it crap out on c_print_type of
__shlib_handle.  __gconv_loaded_object is a forward reference,
but it is not defined in this symtab: it is defined in a different
symtab.

Michael C