darwin: Add new package maloader.

This is the mentioned Mach-O loader that we're yoing to use to execute
Apple's proprietary binaries.

Signed-off-by: aszlig <[e-mail]>

pkgs/os-specific/darwin/maloader/default.nix

···
+{ stdenv, fetchgit, opencflite, clang, libcxx }:
+
+stdenv.mkDerivation {
+  name = "maloader-0git";
+
+  src = fetchgit {
+    url = "git://github.com/shinh/maloader.git";
+    rev = "5f220393e0b7b9ad0cf1aba0e89df2b42a1f0442";
+    sha256 = "07j9b7n0grrbxxyn2h8pnk6pa8b370wq5z5zwbds8dlhi7q37rhn";
+  };
+
+  postPatch = ''
+    sed -i \
+      -e '/if.*loadLibMac.*mypath/s|mypath|"'"$out/lib/"'"|' \
+      -e 's|libCoreFoundation\.so|${opencflite}/lib/&|' \
+      ld-mac.cc
+  '';
+
+  NIX_CFLAGS_COMPILE = "-I${libcxx}/include/c++/v1";
+  buildInputs = [ clang libcxx ];
+  buildFlags = [ "USE_LIBCXX=1" "release" ];
+
+  installPhase = ''
+    install -vD libmac.so "$out/lib/libmac.so"
+
+    for bin in extract macho2elf ld-mac; do
+      install -vD "$bin" "$out/bin/$bin"
+    done
+  '';
+
+  meta = {
+    description = "Mach-O loader for Linux";
+    homepage = "https://github.com/shinh/maloader";
+    license = stdenv.lib.licenses.bsd2;
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   cramfsswap = callPackage ../os-specific/linux/cramfsswap { };
 
-  darwin = {
+  darwin = rec {
     cctools = forceNativeDrv (callPackage ../os-specific/darwin/cctools-port {
       cross = assert crossSystem != null; crossSystem;
     });
+
+    maloader = callPackage ../os-specific/darwin/maloader {
+      inherit opencflite;
+    };
 
     opencflite = callPackage ../os-specific/darwin/opencflite {};