#define xstrdup(_str) strdup(_str)
#endif /* HAVE_MCHECK_H && defined(__GNUC__) */
+#if defined(__GNUC__) || !(defined(__hpux) || defined(_hpux) || defined (hpux))
#define UNUSED(x) x __attribute__((__unused__))
+#else
+#define UNUSED(x) x
+#endif
#include "popt.h"