lua52/cross: Allow to cross-compile to mingw-w64.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

pkgs/development/interpreters/lua-5/5.2.nix

@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
     sha256 = "004zyh9p3lpvbwhyhlmrw6wwcia5abx84q4h2brkn4zdypipvmiz";
   };
 
-  buildInputs = [ readline ];
+  nativeBuildInputs = [ readline ];
 
   patches = [ dsoPatch ];
 
@@ -49,6 +49,29 @@ stdenv.mkDerivation rec {
     EOF
   '';
 
+  crossAttrs = let
+    isMingwW64 = stdenv.cross.config == "x86_64-w64-mingw32";
+  in {
+    configurePhase = ''
+      makeFlagsArray=(
+        INSTALL_TOP=$out
+        INSTALL_MAN=$out/share/man/man1
+        CC=${stdenv.cross.config}-gcc
+        STRIP=:
+        RANLIB=${stdenv.cross.config}-ranlib
+        V=${majorVersion}
+        R=${version}
+        ${stdenv.lib.optionals isMingwW64 "mingw"}
+      )
+    '' + stdenv.lib.optionalString isMingwW64 ''
+      installFlagsArray=(
+        TO_BIN="lua.exe luac.exe"
+        TO_LIB="liblua.a lua52.dll"
+        INSTALL_DATA="cp -d"
+      )
+    '';
+  };
+
   meta = {
     homepage = "http://www.lua.org";
     description = "Powerful, fast, lightweight, embeddable scripting language";