Get getopt and obstack from -liberty rather than compiling them here.
* coffread.c: turn a printf into a complain(), and try to deal more
gracefully with botched-looking lineno pointers.
* dbxread.c: Use bfd_get_symcount rather than bfd_get_symcount_upper_bound.
Don't coredump on files with zero symbols in them (a BFD bug showed this one).
* environ.c: Pass GNUTARGET into the parent (gdb) as well as the child.
a file, once a new symtab has been read for it.
* symtab.h (GLOBAL_BLOCK, STATIC_BLOCK, FIRST_LOCAL_BLOCK): New
defines for the blocks of a blockvector that contain global and
file-static symbols and the first of the smaller scope contours.
* symtab.c (lookup_symbol, find_pc_symtab, find_pc_line,
decode_line_1, make_symbol_completion_list): Use the above.
* coffread.c (end_symtab, patch_opaque_types): Ditto.
