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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.
+ */
+
+%{
+/* Build "scanner.c".
+ The scanner is not important.
+ This test is really about compilation. See "main.c".
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include "config.h"
+
+#ifndef DEFINE_ME
+#error "DEFINE_ME undefined!"
+#endif
+%}
+
+%top{
+#define DEFINE_ME 1
+}
+
+%option reentrant
+%option 8bit outfile="scanner.c" prefix="test"
+%option nounput nomain noyywrap
+%option warn
+
+
+%%
+
+.|\n { }
+
+%%
+