* check.c (gfc_check_present): Allow coarrays.
* trans-array.c (gfc_conv_array_ref): Avoid casting
when a pointer is wanted.
* trans-decl.c (create_function_arglist): For -fcoarray=lib,
handle hidden token and offset arguments for nondescriptor
coarrays.
* trans-expr.c (get_tree_for_caf_expr): New function.
(gfc_conv_procedure_call): For -fcoarray=lib pass the
token and offset for nondescriptor coarray dummies.
* trans.h (lang_type): Add caf_offset tree.
(GFC_TYPE_ARRAY_CAF_OFFSET): New macro.