This patch is part of a series of patches for speech-tools for
Debian GNU/Linux, which primarily fix build errors with GCC 4.3 and newer.

Index: b/include/EST_String.h
===================================================================
--- a/include/EST_String.h
+++ b/include/EST_String.h
@@ -67,6 +67,11 @@
   * @version $Id: EST_String.h,v 1.6 2006/07/08 13:03:36 awb Exp $
   */
 
+class EST_String;
+EST_String operator + (const EST_String &a, const EST_String &b);
+EST_String operator + (const char *a, const EST_String &b);
+EST_String operator + (const EST_String &a, const char *b);
+
 class EST_String {
 
     /** For better libg++ compatibility.