corrections to make everyone happy, it now compiles with Clang, MSVC, and MinGW!

src/framework.h

@@ -1,6 +1,20 @@
 #pragma once
 
-#include <WinSDKVer.h>
+#ifndef STRICT
+ #define STRICT
+#endif 
+
+#ifndef UNICODE
+ #define UNICODE
+#endif
+
+#ifndef _UNICODE
+ #define _UNICODE
+#endif
+
+#ifndef __MINGW32__
+ #include <WinSDKVer.h>
+#endif // not __MINGW32__
 
 #ifndef WINVER
  #define WINVER _WIN32_WINNT_WINXP
@@ -21,9 +35,12 @@
  #define _ATL_XP_TARGETING
 #endif // _ATL_XP_TARGETING
 
-#include <SDKDDKVer.h>
+#ifndef __MINGW32__
+ #include <SDKDDKVer.h>
+#endif // not __MINGW32__
 
 #include <windows.h>
+#include <combaseapi.h>
 #include <commctrl.h>
 #include <commdlg.h>
 #include <tchar.h>

src/resource.h

@@ -5,7 +5,9 @@
 
 #pragma once
 
-#pragma code_page(65001) // UTF-8
+#ifdef __clang__
+ #pragma code_page(65001) // UTF-8
+#endif // __clang__
 
 #include "version.h"
 

src/utils.cc

@@ -2,7 +2,23 @@
 
 #include "globals.h"
 
-static bool is_win11;
+namespace {
+  static bool is_win11;
+
+  static ULONG NT_MAJOR = 0;
+
+  static ULONG NT_MINOR = 0;
+
+  static ULONG NT_BUILD = 0;
+
+  static std::wstring NT_CSD_VERSION;
+
+  static std::string NT_SERVICE_PACK;
+
+  static USHORT NT_SUITE;
+
+  static UCHAR NT_TYPE;
+}
 
 HANDLE LoadImageFromDLL(LPCWSTR dllName,
                         UINT resourceId,
@@ -431,11 +447,16 @@ std::string const GetNTString() {
 // See http://ref.x86asm.net/coder32.html
 void ImmediateDebugCrash() {
 #if defined(_WIN32) && !defined(_WIN64)
+ #ifdef __MINGW32__
+  asm("int3\n\t"
+      "ud2");
+ #else
   // 32 bit assembly code
   __asm int 3 // Execute int3 interrupt
   __asm {
           UD2 // Execute 0x0F, 0x0B
         }
+ #endif // __MINGW32__
 #elif defined(_WIN64) // x86_64
   /* MSVC-specific x64 ud2 since MSVC doesn't allow inline assembly
      when compiling for x64 */

src/utils.h

@@ -1,27 +1,25 @@
 #ifndef XP_ACTIVATE32_UTILS_H_
 #define XP_ACTIVATE32_UTILS_H_
 
+#ifdef __MINGW32__
+ extern "C" {
+  static __inline__ __attribute__((always_inline)) unsigned long long __emulu(
+      const unsigned int a, const unsigned int b) {
+    unsigned long long retval;
+    __asm__("mull %[b]" : "=A"(retval) : [a] "a"(a), [b] "rm"(b));
+    return retval;
+  }
+ }
+ #define __noop(...) ((void)0)
+#endif // __MINGW32__
+
+#include <intrin.h>
+
 #include "constants.h"
 #include "framework.h"
 
 extern wchar_t strings[16][256];
 
-namespace {
-  static ULONG NT_MAJOR = 0;
-
-  static ULONG NT_MINOR = 0;
-
-  static ULONG NT_BUILD = 0;
-
-  static std::wstring NT_CSD_VERSION;
-
-  static std::string NT_SERVICE_PACK;
-
-  static USHORT NT_SUITE;
-
-  static UCHAR NT_TYPE;
-}
-
 static std::string NT_FEATURE_VERSION;
 
 static std::string NT_POST_STRING;

src/version.h

@@ -1,7 +1,9 @@
 #ifndef XP_ACTIVATE32_VERSION_H_
 #define XP_ACTIVATE32_VERSION_H_
 
-#pragma code_page(65001) // UTF-8
+#ifdef __clang__
+ #pragma code_page(65001) // UTF-8
+#endif // __clang__
 
 // Macro to convert to string
 #if !defined(_STRINGIZER) && !defined(STRINGIZE)

src/xp_activate32.cc

@@ -1038,14 +1038,11 @@ INT_PTR CALLBACK DialogProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
   return FALSE;
 }
 
-int WINAPI wWinMain(_In_ HINSTANCE hInstance,
-             _In_opt_ HINSTANCE hPrevInstance,
-             _In_ WCHAR *pCmdLine,
-             _In_ INT nCmdShow) {
+int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow) {
   UNREFERENCED_PARAMETER(hPrevInstance);
   /* Assign global HINSTANCE */
   g_hInstance = hInstance;
-  MSG Msg;
+  //MSG Msg;
   long err_status;
 
   // Allow and allocate conhost

src/xp_activate32.h

@@ -1,23 +1,10 @@
 #ifndef XP_ACTIVATE32_H_
 #define XP_ACTIVATE32_H_
 
-#include <intrin.h>
-
 #include "constants.h"
 #include "framework.h"
 #include "resource.h"
-
-#ifndef STRICT
- #define STRICT
-#endif 
-
-#ifndef UNICODE
- #define UNICODE
-#endif
-
-#ifndef _UNICODE
- #define _UNICODE
-#endif
+#include "utils.h"
 
 typedef struct {
   ui64 u[2];