{ stdenv, fetchurl, static ? false }: let version = "1.2.8"; in stdenv.mkDerivation rec { name = "zlib-${version}"; src = fetchurl { urls = [ "http://www.zlib.net/${name}.tar.gz" # old versions vanish from here "mirror://sourceforge/libpng/zlib/${version}/${name}.tar.gz" ]; sha256 = "039agw5rqvqny92cpkrfn243x2gd4xn13hs3xi6isk55d2vqqr9n"; }; configureFlags = if static then "" else "--shared"; preConfigure = '' if test -n "$crossConfig"; then export CC=$crossConfig-gcc configureFlags=${if static then "" else "--shared"} fi ''; # As zlib takes part in the stdenv building, we don't want references # to the bootstrap-tools libgcc (as uses to happen on arm/mips) NIX_CFLAGS_COMPILE = "-static-libgcc"; crossAttrs = { dontStrip = static; } // stdenv.lib.optionalAttrs (stdenv.cross.libc == "msvcrt") { configurePhase='' installFlags="BINARY_PATH=$out/bin INCLUDE_PATH=$out/include LIBRARY_PATH=$out/lib" ''; makeFlags = [ "-f" "win32/Makefile.gcc" "PREFIX=${stdenv.cross.config}-" ] ++ (if static then [] else [ "SHARED_MODE=1" ]); }; # zlib doesn't like the automatic --disable-shared from the Cygwin stdenv. cygwinConfigureEnableShared = true; }