Fix #297

include/tradstdc.h

@@ -429,12 +429,14 @@ typedef genericptr genericptr_t; /* (void *) or (char *) */
 #if __GNUC__ >= 3
 #define UNUSED __attribute__((unused))
 #define NORETURN __attribute__((noreturn))
+#if !defined(__linux__) || defined(GCC_URWARN)
 /* disable gcc's __attribute__((__warn_unused_result__)) since explicitly
    discarding the result by casting to (void) is not accepted as a 'use' */
 #define __warn_unused_result__ /*empty*/
 #define warn_unused_result /*empty*/
 #endif
 #endif
+#endif
 
 #ifndef PRINTF_F
 #define PRINTF_F(f, v)