re PR fortran/20896 (ambiguous interface not detected)

re PR fortran/20896 (ambiguous interface not detected)

2006-12-27  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/20896
	* interface.c (check_sym_interfaces): Try to resolve interface
	reference as a global symbol, if it is not a nodule procedure.
	(compare_actual_formal): Remove call to gfc_find_symbol; if
	the expression is already a variable it is locally declared
	and this has precedence.
	gfortran.h : Add prototype for resolve_global_procedure.
	resolve.c (resolve_global_procedure): Remove static attribute
	from function declaration.
	(resolve_fl_procedure): Remove symtree declaration and the
	redundant check for an ambiguous procedure.

	PR fortran/25135
	* module.c (load_generic_interfaces): If the symbol is present
	and is not generic it is ambiguous.

2006-12-27  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/20896
	* gfortran.dg/interface_10.f90: New test.
	* gfortran.dg/dummy_procedure_1.f90: Add error for call s1(z),
	since z is already, locally a variable.

	PR fortran/25135
	* gfortran.dg/generic_11.f90: New test.
	* gfortran.dg/interface_7.f90: Remove name clash between module
	name and procedure 'x' referenced in the interface.

From-SVN: r120218