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diff --git a/tests/cxx_yywrap.ll b/tests/cxx_yywrap.ll
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+/*
+ * This file is part of flex.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
+%{
+
+#include "config.h"
+#include <fstream>
+
+%}
+
+%option 8bit prefix="test"
+%option nounput nomain
+%option warn c++
+
+
+%%
+
+.              { }
+
+%%
+
+#define MAX_FILES 10
+
+char *files[MAX_FILES] = { 0 };
+int filecounter = 0;
+
+int testFlexLexer::yywrap()
+{
+    if (filecounter-- > 0) {
+        std::cout << "NOW WRAPPING TO READ " << files[filecounter] << std::endl;
+        std::ifstream *ifs = new std::ifstream(files[filecounter]);
+        switch_streams(ifs);
+        return 0;
+    }
+    return 1;
+}
+
+int
+main (int argc, char *argv[])
+{
+    for (int i = 1; i < argc && i <= MAX_FILES; i++) {
+        files[i-1] = argv[i];
+	filecounter++;
+    }
+    testFlexLexer* f = new testFlexLexer;
+    f->yywrap();
+    f->yylex();
+    std::cout << "TEST RETURNING OK." << std::endl;
+    return 0;
+}