Index: ChangeLog
===================================================================
--- ChangeLog   (revision 164446)
+++ ChangeLog   (working copy)
@@ -1,3 +1,8 @@
+2010-09-20  Nicola Pero  <nicola.pero@meta-innovation.com>
+
+       * c-family/c-common.h (constant_string_class): Documented with
+       comment identical to the one already in c-common.c.
+
 2010-09-20  Jakub Jelinek  <jakub@redhat.com>
 
        * dwarf2out.c (any_cfis_emitted): New static variable.
Index: c-family/c-common.h
===================================================================
--- c-family/c-common.h (revision 164446)
+++ c-family/c-common.h (working copy)
@@ -561,7 +561,7 @@ extern int flag_hosted;
 
 extern int print_struct_values;
 
-/* ???.  Undocumented.  */
+/* Tells the compiler what is the constant string class for ObjC.  */
 
 extern const char *constant_string_class_name;