Adding windows jom; it does not build for me still, but it's close to it.

I think it's better to share it though. I wrote a comment about the expression
not building.


svn path=/nixpkgs/trunk/; revision=34365

pkgs/os-specific/windows/jom/default.nix

@@ -0,0 +1,36 @@
+{ stdenv, fetchgit, qt48, flex, cmake }:
+
+# At the time of committing this, the expression fails for me to cross-build in
+# both mingw32 and mingw64.
+
+stdenv.mkDerivation {
+  name = "jom-1.0.11";
+
+  src = fetchgit {
+    url = git://gitorious.org/qt-labs/jom.git;
+    rev = "c91a204b05f97eef3c73aaaba3036e20f79fd487";
+    sha256 = "6d3ac84f83bb045213903d9d5340c0447c8fe41671d1dcdeae5c40b66d62ccbf";
+  };
+
+  buildInputs = [ qt48 ];
+  buildNativeInputs = [ flex /*cmake*/ ];
+
+  QTDIR = qt48;
+  configurePhase = ''
+    qmake PREFIX=$out
+  '';
+  
+  crossAttrs = {
+    # cmakeFlags = "-DWIN32=1 -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_RC_COMPILER=${stdenv.cross.config}-windres";
+    QTDIR = qt48.hostDrv;
+    preBuild = ''
+      export NIX_CROSS_CFLAGS_COMPILE=-fpermissive
+    '';
+  };
+
+  meta = {
+    homepage = http://qt-project.org/wiki/jom;
+    description = "Clone of nmake supporting multiple independent commands in parallel";
+    license = "GPLv2+"; # Explicitly, GPLv2 or GPLv3, but not later.
+  };
+}

pkgs/top-level/all-packages.nix

@@ -6066,6 +6066,8 @@ let
   };
 
   windows = rec {
+    jom = callPackage ../os-specific/windows/jom { };
+
     w32api = callPackage ../os-specific/windows/w32api {
       gccCross = gccCrossStageStatic;
       binutilsCross = binutilsCross;