Allow compilation with MinGW to succeed (microsoft#108)

- Tested with 7.3-win32 20180312

Co-authored-by: Brian Gianforcaro <[email protected]>

Author: virtuald

src/detours.h

@@ -48,6 +48,14 @@
 #pragma warning(pop)
 #endif
 
+// Allow Detours to cleanly compile with the MingW toolchain.
+//
+#ifdef __GNUC__
+#define __try
+#define __except(x) if (0)
+#include <strsafe.h>
+#endif
+
 // From winerror.h, as this error isn't found in some SDKs:
 //
 // MessageId: ERROR_DYNAMIC_CODE_BLOCKED
@@ -846,7 +854,7 @@ VOID CALLBACK DetourFinishHelperProcess(_In_ HWND,
 
 //////////////////////////////////////////////////////////////////////////////
 //
-#if (_MSC_VER < 1299)
+#if (_MSC_VER < 1299) && !defined(__GNUC__)
 #include <imagehlp.h>
 typedef IMAGEHLP_MODULE IMAGEHLP_MODULE64;
 typedef PIMAGEHLP_MODULE PIMAGEHLP_MODULE64;

src/image.cpp

@@ -146,6 +146,8 @@ class CImageData
     DWORD                   m_cbAlloc;
 };
 
+class CImageImportName;
+
 class CImageImportFile
 {
     friend class CImage;

src/modules.cpp

@@ -340,7 +340,7 @@ PVOID WINAPI DetourGetEntryPoint(_In_opt_ HMODULE hModule)
             }
 
             SetLastError(NO_ERROR);
-            return GetProcAddress(hClr, "_CorExeMain");
+            return (PVOID)GetProcAddress(hClr, "_CorExeMain");
         }
 
         SetLastError(NO_ERROR);