2013-03-02  Mikael Morin  <mikael@gcc.gnu.org>

	PR fortran/55574
	* gfortran.h (generate_isocbinding_symbol): New argument in prototype.
	* module.c (import_iso_c_binding_module): Update calls to
	generate_isocbinding_symbol.
	* symbol.c (gen_special_c_interop_ptr, gen_cptr_param): Ditto.
	(check_iso_c_symbol): New function.
	(generate_isocbinding_symbol): New argument 'hidden'.
	Rewrite existing symbol lookup.  Avoid namespace pollution if 'hidden'
	is set.