--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/3rdparty/patches/libpng-1.2.20-elf-visibility.patch	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,17 @@
+--- pngconf.h.orig	2007-09-08 05:22:56.000000000 +0200
++++ pngconf.h	2007-09-09 00:00:00.000000000 +0200
+@@ -1375,6 +1375,14 @@
+ #      if 0 /* ... other platforms, with other meanings */
+ #      endif
+ #   endif
++
++#   if !defined(PNG_IMPEXP)
++#       include <qconfig.h>
++#       if defined(QT_VISIBILITY_AVAILABLE)
++#           define PNG_IMPEXP __attribute__((visibility("default")))
++#       endif
++#   endif
++
+ #endif
+ 
+ #ifndef PNGAPI