diff -Naur libpng-1.2.36/pngconf.h libpng-1.2.36-magellan/pngconf.h
--- libpng-1.2.36/pngconf.h	2009-05-07 18:05:28.000000000 +0200
+++ libpng-1.2.36-magellan/pngconf.h	2009-05-25 20:49:35.000000000 +0200
@@ -332,8 +332,8 @@
        /* If you encounter a compiler error here, see the explanation
         * near the end of INSTALL.
         */
-           __pngconf.h__ in libpng already includes setjmp.h;
-           __dont__ include it again.;
+#warning           __pngconf.h__ in libpng already includes setjmp.h;
+#warning           __dont__ include it again.;
 #      endif
 #    endif /* __linux__ */
 #  endif /* PNG_SKIP_SETJMP_CHECK */