nixpkgs/pkgs/development/libraries/libpng/12.nix

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{ stdenv, fetchurl, zlib, xz }:
assert !(stdenv ? cross) -> zlib != null;
stdenv.mkDerivation rec {
name = "libpng-1.2.51";
src = fetchurl {
url = "mirror://sourceforge/libpng/${name}.tar.xz";
sha256 = "0jkdlmnvn72jwm94dp98pznm9fy7alvcr2zpfh2dgbr2n09vimy7";
};
propagatedBuildInputs = [ zlib ];
nativeBuildInputs = [ xz ];
passthru = { inherit zlib; };
crossAttrs = stdenv.lib.optionalAttrs (stdenv.cross.libc == "libSystem") {
propagatedBuildInputs = [];
passthru = {};
};
configureFlags = "--enable-static";
meta = {
description = "The official reference implementation for the PNG file format";
homepage = http://www.libpng.org/pub/png/libpng.html;
license = "free-non-copyleft"; # http://www.libpng.org/pub/png/src/libpng-LICENSE.txt
};
}