--- pngconf.h 2008-12-18 03:45:16.000000000 -0800
+++ pngconf.h.new 2008-12-21 19:06:04.000000000 -0800
@@ -323,8 +323,8 @@
      /* If you encounter a compiler error here, see the explanation
       * near the end of INSTALL.
       */
-         __pngconf.h__ already includes setjmp.h;
-         __dont__ include it again.;
+ #warning __pngconf.h__ already includes setjmp.h;
+ #warning __dont__ include it again.;
 #    endif
 #  endif /* __linux__ */