sys-libs/zlib dev-util/pkgconfig app-arch/unzip sys-libs/zlib 0 mirror://sourceforge/apng/APNG_Optimizer/1.1/apngopt-1.1-src.zip http://sourceforge.net/projects/apng/ LGPL-2.1 optimize APNG images ~amd64 ~x86 multilib toolchain-funcs 4 compile install