tree.c (build_srcloc): Make sure we allocate this node on the permanent obstack.

	* tree.c (build_srcloc): Make sure we allocate this node on the
	permanent obstack.
fixes OSE compilation failures

From-SVN: r20793

gcc/cp/ChangeLog

+1998-06-29  Brendan Kehoe  <brendan@cygnus.com>
+
+	* tree.c (build_srcloc): Make sure we allocate this node on the
+	permanent obstack.
+
 Sat Jun 27 23:34:18 1998  Fred Fish  <fnf@ninemoons.com>
 
 	* g++spec.c (NEED_MATH_LIBRARY): Define to 1 if not already defined.

gcc/cp/tree.c

@@ -211,6 +211,12 @@ lvalue_p (ref)
       return (lvalue_p (TREE_OPERAND (ref, 0))
 	      && lvalue_p (TREE_OPERAND (ref, 1)));
 
+    case NOP_EXPR:
+      /* GNU extension:
+	 A cast is a valid lvalue if its operand is an lvalue. */
+      if (! pedantic)
+	return lvalue_p (TREE_OPERAND (ref, 0));
+
     default:
       break;
     }
@@ -2300,9 +2306,21 @@ build_srcloc (file, line)
      char *file;
      int line;
 {
-  tree t = make_node (SRCLOC);
+  tree t;
+
+  /* Make sure that we put these on the permanent obstack; up in
+     add_pending_template, we pass this return value into perm_tree_cons,
+     which also puts it on the permanent_obstack.  However, this wasn't
+     explicitly doing the same.  */
+  register struct obstack *ambient_obstack = current_obstack;
+  current_obstack = &permanent_obstack;
+
+  t = make_node (SRCLOC);
   SRCLOC_FILE (t) = file;
   SRCLOC_LINE (t) = line;
+
+  current_obstack = ambient_obstack;
+
   return t;
 }