--- libpng-1.2.24/pngconf.h.orig	2007-12-14 17:22:25.000000000 +0100
+++ libpng-1.2.24/pngconf.h	2008-02-12 14:15:16.000000000 +0100
@@ -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__ */