re PR fortran/45776 (Full implementation of variable definition contexts (and related checks))

2010-09-25  Daniel Kraft  <d@domob.eu>

	PR fortran/45776
	* gfortran.h (struct gfc_dt): New member `dt_io_kind'.
	* io.c (resolve_tag): F2008 check for NEWUNIT and variable
	definition checks for NEWUNIT, IOSTAT, SIZE and IOMSG.
	(gfc_free_dt): Correctly handle freeing of `dt_io_kind' and
	`extra_comma' with changed semantics.
	(gfc_resolve_dt): Check variable definitions.
	(match_io_element): Remove INTENT and PURE checks here and
	initialize code->ext.dt member.
	(match_io): Set dt->dt_io_kind.
	(gfc_resolve_inquire): Check variable definition for all tags
	except UNIT, FILE and ID.
	* resolve.c (resolve_transfer): Variable definition check.

2010-09-25  Daniel Kraft  <d@domob.eu>

	PR fortran/45776
	* gfortran.dg/io_constraints_6.f03: New test.
	* gfortran.dg/io_constraints_7.f03: New test.
	* gfortran.dg/newunit_2.f90: New test.

From-SVN: r164619