Windows: Define _WIN32_WINRT to 0x0600 (Vista)

Passed as a compiler define to be sure it is always define before windows.h
is loaded. This means that Godot officially requires Vista API or later, it will
not work on Windows XP or earlier.

Also fix a bogus check for Windows 7 API.

(cherry picked from commit 6323779596dea0db7f58afef7d3d3d5588ef20cb)

drivers/unix/ip_unix.cpp

@@ -37,19 +37,13 @@
   #ifndef AI_ADDRCONFIG
     #define AI_ADDRCONFIG 0x00000400
   #endif
- #ifdef WINRT_ENABLED
   #include <ws2tcpip.h>
   #include <winsock2.h>
   #include <windows.h>
   #include <stdio.h>
- #else
-  #define WINVER 0x0600
-  #include <ws2tcpip.h>
-  #include <winsock2.h>
-  #include <windows.h>
-  #include <stdio.h>
-  #include <iphlpapi.h>
- #endif
+  #ifndef WINRT_ENABLED
+    #include <iphlpapi.h>
+  #endif
 #else
  #include <netdb.h>
  #ifdef ANDROID_ENABLED

drivers/windows/file_access_windows.cpp

@@ -28,8 +28,6 @@
 /*************************************************************************/
 #ifdef WINDOWS_ENABLED
 
-#define WINVER 0x0500
-
 #include <windows.h>
 #include "shlwapi.h"
 #include "file_access_windows.h"

platform/windows/context_gl_win.cpp

@@ -40,7 +40,6 @@
 //
 //
 
-#define WINVER 0x0500
 #include "context_gl_win.h"
 
 //#include "drivers/opengl/glwrapper.h"

platform/windows/detect.py

@@ -198,6 +198,10 @@ def build_res_file(target, source, env):
 def configure(env):
 
     env.Append(CPPPATH=['#platform/windows'])
+
+    # Targeted Windows version: Vista (and later)
+    env.Append(CPPFLAGS=['-D_WIN32_WINNT=0x0600'])
+
     env['is_mingw'] = False
     if (os.name == "nt" and os.getenv("VSINSTALLDIR") != None):
         # build using visual studio

platform/windows/key_mapping_win.cpp

@@ -26,8 +26,8 @@
 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
-#define WINVER 0x0500
 #include "key_mapping_win.h"
+
 #include <stdio.h>
 
 struct _WinTranslatePair {

platform/windows/os_windows.cpp

@@ -686,7 +686,7 @@ LRESULT OS_Windows::WndProc(HWND hWnd,UINT uMsg, WPARAM	wParam,	LPARAM	lParam) {
 			print_line("input lang change");
 		} break;
 
-		#if WINVER >= 0x0700 // for windows 7
+		#if WINVER >= 0x0601 // for windows 7
 		case WM_TOUCH: {
 
 			BOOL bHandled = FALSE;

platform/windows/os_windows.h

@@ -29,8 +29,6 @@
 #ifndef OS_WINDOWS_H
 #define OS_WINDOWS_H
 
-#define WINVER 0x0600
-
 #include "os/input.h"
 #include "os/os.h"
 #include "context_gl_win.h"