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nixpkgs/pkgs/development/libraries/zlib/default.nix

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Nix

{ stdenv, fetchurl, static ? false }:
let version = "1.2.7"; 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 = "1i96gsdvxqb6skp9a58bacf1wxamwi9m9pg4yn7cpf7g7239r77s";
};
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;
}