Make all of the rest of the code base be conditionally compiled.

DMREMB.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2015,2016,2023 by Jonathan Naylor G4KLX
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -17,9 +17,10 @@
  */
 
 #include "DMREMB.h"
-
 #include "QR1676.h"
 
+#if defined(USE_DMR)
+
 #include <cstdio>
 #include <cassert>
 
@@ -98,3 +99,6 @@ void CDMREMB::setLCSS(unsigned char lcss)
 {
 	m_LCSS = lcss;
 }
+
+#endif
+