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--- a/Signals.def.m2cc
+++ b/Signals.def.m2cc
@@ -29,7 +29,11 @@
   (*   GM2   : Parameter werden fuer den GNU Modula-2 Compilter gesetzt     *)
   (*   MOCKA : Parameter werden fuer den MOCKA        Compilter gesetzt     *)
   (*                                                                        *)
-  (* Licence : GNU Lesser General Public License (LGPL)                     *)
+  (* Interface to UNIX signals, there versions are contained for XDS, GNU   *)
+  (* and the Mocka complier, can be obtained by the commad line shown       *)
+  (*------------------------------------------------------------------------*)
+  (* Implementation : Michael Riedl                                         *)
+  (* Licence        : GNU Lesser General Public License (LGPL)              *)
   (*------------------------------------------------------------------------*)
 
   (* $Id: Signals.def.m2cc,v 1.4 2018/01/14 15:30:34 mriedl Exp $ *)