_obstack_begin
extern int _obstack_begin (struct obstack *, int, int,
extern int _obstack_begin ();
_obstack_begin ((h), 0, 0, \
_obstack_begin ((h), (size), 0, \
_obstack_begin ((h), (size), (alignment), \
_obstack_begin ((h), 0, 0, \
_obstack_begin ((h), (size), 0, \
_obstack_begin ((h), (size), (alignment), \