# From http://sourceforge.net/projects/libpng/files/libpng16/1.6.18/ md5 6a57c8e0f5469b9c9949a4b43d57b3a1 libpng-1.6.18.tar.xz sha1 c6e06510d30beba08c96c468ab269fafb2bb256f libpng-1.6.18.tar.xz