[Bug fortran/45211] C interoperable error when compiling BIND(C) function in a module.

["burnus at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #3 from burnus at gcc dot gnu dot org  2010-08-14 16:24 -------
Cf.
http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/887251d8cd64eb02

Lightly tested patch. The ts.is_c_interop is only set when via
verify_bind_c_derived_type, which is called by resolve.c - and thus comes too
late.

I am not sure whether this now allows DT which are not BIND(C) and whether one
thus should add an !attr.resolved, but I assume that incompatibilities between
the BIND(C) attribute for the DT and the actual DT will be found at resolution
time. Thus, the patch should be fine.

Index: gcc/fortran/decl.c
===================================================================
--- gcc/fortran/decl.c  (Revision 163239)
+++ gcc/fortran/decl.c  (Arbeitskopie)
@@ -991,7 +991,7 @@ verify_c_interop_param (gfc_symbol *sym)
              /* Make personalized messages to give better feedback.  */
              if (sym->ts.type == BT_DERIVED)
                gfc_error ("Type '%s' at %L is a parameter to the BIND(C) "
-                          " procedure '%s' but is not C interoperable "
+                          "procedure '%s' but is not C interoperable "
                           "because derived type '%s' is not C interoperable",
                           sym->name, &(sym->declared_at),
                           sym->ns->proc_name->name, 
@@ -3612,7 +3612,8 @@ gfc_try
 verify_c_interop (gfc_typespec *ts)
 {
   if (ts->type == BT_DERIVED && ts->u.derived != NULL)
-    return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE);
+    return (ts->u.derived->ts.is_c_interop || ts->u.derived->attr.is_bind_c)
+          ? SUCCESS : FAILURE;
   else if (ts->is_c_interop != 1)
     return FAILURE;


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45211