Making wxGTK stay wxGTK even cross-built, so I remove the wxMSW code I added to test the crossbuilding with wxGTK. I added a new windows-specific package: wxMSW.

svn path=/nixpkgs/trunk/; revision=21634

pkgs/development/libraries/wxGTK-2.8/default.nix

···
     "--with-opengl"
   ];
 
-  # Cross build only tested for mingw32
-  # Additionally, this should not be called wxGTK anymore, if built for
-  # mingw32. But before placing this in a better place, it helps as a test for
-  # mingw32.
-  crossAttrs = assert stdenv.cross.libc == "msvcrt"; {
-    src = fetchurl {
-      url = mirror://sourceforge/wxwindows/wxWidgets-2.8.11.tar.gz;
-      sha256 = "0icxd21g18d42n1ygshkpw0jnflm03iqki6r623pb5hhd7fm2ksj";
-    };
-    buildInputs = [];
-    propagatedBuildInputs = [];
-    SEARCH_INCLUDE="";
-    SEARCH_LIB="";
-  };
-
   # This variable is used by configure to find some dependencies.
   SEARCH_INCLUDE =
     "${libXinerama}/include ${libSM}/include ${libXxf86vm}/include";

pkgs/os-specific/windows/wxMSW-2.8/default.nix

···
+{ stdenv, fetchurl, compat24 ? false, compat26 ? true, unicode ? true,
+}:
+
+assert stdenv ? cross -> stdenv.cross.libc == "msvcrt";
+
+stdenv.mkDerivation {
+  name = "wxMSW-2.8.11";
+
+  src = fetchurl {
+    url = mirror://sourceforge/wxwindows/wxWidgets-2.8.11.tar.gz;
+    sha256 = "0icxd21g18d42n1ygshkpw0jnflm03iqki6r623pb5hhd7fm2ksj";
+  };
+
+  configureFlags = [
+    (if compat24 then "--enable-compat24" else "--disable-compat24")
+    (if compat26 then "--enable-compat26" else "--disable-compat26")
+    "--disable-precomp-headers"
+    (if unicode then "--enable-unicode" else "")
+    "--with-opengl"
+  ];
+
+  # Cross build only tested for mingw32
+  checkCross = throw "This package can only be cross-built" false;
+  crossAttrs = {
+    checkCross = true;
+  };
+
+  preConfigure = "
+    substituteInPlace configure --replace /usr /no-such-path
+  ";
+
+  postBuild = "(cd contrib/src && make)";
+
+  postInstall = "
+    (cd contrib/src && make install)
+    (cd $out/include && ln -s wx-*/* .)
+  ";
+
+  passthru = {inherit compat24 compat26 unicode;};
+}

pkgs/top-level/all-packages.nix

···
 
   gccCrossStageStatic = let
       isMingw = (stdenv.cross.libc == "msvcrt");
-      libcCross1 = if isMingw then mingw_headers1 else null;
+      libcCross1 = if isMingw then windows.mingw_headers1 else null;
     in
       wrapGCCCross {
       gcc = forceBuildDrv (lib.addMetaAttrs { platforms = []; } (
···
   # Only needed for mingw builds
   gccCrossMingw2 = wrapGCCCross {
     gcc = gccCrossStageStatic.gcc;
-    libc = mingw_headers2;
+    libc = windows.mingw_headers2;
     binutils = binutilsCross;
     cross = assert crossSystem != null; crossSystem;
   };
···
   # We can choose:
   libcCrossChooser = name : if (name == "glibc") then glibcCross
     else if (name == "uclibc") then uclibcCross
-    else if (name == "msvcrt") then mingw_headers3
+    else if (name == "msvcrt") then windows.mingw_headers3
     else throw "Unknown libc";
 
   libcCross = assert crossSystem != null; libcCrossChooser crossSystem.libc;
···
     inherit ncurses;
   };
 
-  w32api = makeOverridable (import ../os-specific/windows/w32api) {
-    inherit fetchurl stdenv;
-    gccCross = gccCrossStageStatic;
-    binutilsCross = binutilsCross;
-  };
+  windows = rec {
+    w32api = makeOverridable (import ../os-specific/windows/w32api) {
+      inherit fetchurl stdenv;
+      gccCross = gccCrossStageStatic;
+      binutilsCross = binutilsCross;
+    };
 
-  w32api_headers = w32api.override {
-    onlyHeaders = true;
-  };
+    w32api_headers = w32api.override {
+      onlyHeaders = true;
+    };
 
-  mingw_runtime = makeOverridable (import ../os-specific/windows/mingwrt) {
-    inherit fetchurl stdenv;
-    gccCross = gccCrossMingw2;
-    binutilsCross = binutilsCross;
-  };
+    mingw_runtime = makeOverridable (import ../os-specific/windows/mingwrt) {
+      inherit fetchurl stdenv;
+      gccCross = gccCrossMingw2;
+      binutilsCross = binutilsCross;
+    };
 
-  mingw_runtime_headers = mingw_runtime.override {
-    onlyHeaders = true;
-  };
+    mingw_runtime_headers = mingw_runtime.override {
+      onlyHeaders = true;
+    };
 
-  mingw_headers1 = buildEnv {
-    name = "mingw-headers-1";
-    paths = [ w32api_headers mingw_runtime_headers ];
-  };
+    mingw_headers1 = buildEnv {
+      name = "mingw-headers-1";
+      paths = [ w32api_headers mingw_runtime_headers ];
+    };
 
-  mingw_headers2 = buildEnv {
-    name = "mingw-headers-2";
-    paths = [ w32api mingw_runtime_headers ];
-  };
+    mingw_headers2 = buildEnv {
+      name = "mingw-headers-2";
+      paths = [ w32api mingw_runtime_headers ];
+    };
 
-  mingw_headers3 = buildEnv {
-    name = "mingw-headers-3";
-    paths = [ w32api mingw_runtime ];
+    mingw_headers3 = buildEnv {
+      name = "mingw-headers-3";
+      paths = [ w32api mingw_runtime ];
+    };
+
+    wxMSW = makeOverridable (import ../os-specific/windows/wxMSW-2.8) {
+      inherit fetchurl stdenv;
+    };
   };
 
   wesnoth = import ../games/wesnoth {