- Fixed building with vanilla MinGW, at least with whatever modified header files that my system has from my last experimentation.

src/CMakeLists.txt

@@ -178,8 +178,12 @@ if( WIN32 )
 		comdlg32
 		ws2_32
 		setupapi
-		oleaut32 
-		DelayImp )
+		oleaut32 )
+
+	if( NOT ZD_CMAKE_COMPILER_IS_GNUCXX_COMPATIBLE )
+		set( ZDOOM_LIBS ${ZDOOM_LIBS} DelayImp )
+	endif()
+
 	if( DX_dxguid_LIBRARY )
 		list( APPEND ZDOOM_LIBS "${DX_dxguid_LIBRARY}" )
 	endif()

src/win32/i_specialpaths.cpp

@@ -46,6 +46,15 @@
 
 #include "optwin32.h"
 
+// Vanilla MinGW does not have folder ids
+#if defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)
+static const GUID FOLDERID_LocalAppData = { 0xf1b32785, 0x6fba, 0x4fcf, 0x9d, 0x55, 0x7b, 0x8e, 0x7f, 0x15, 0x70, 0x91 };
+static const GUID FOLDERID_RoamingAppData = { 0x3eb685db, 0x65f9, 0x4cf6, 0xa0, 0x3a, 0xe3, 0xef, 0x65, 0x72, 0x9f, 0x3d };
+static const GUID FOLDERID_SavedGames = { 0x4c5c32ff, 0xbb9d, 0x43b0, 0xb5, 0xb4, 0x2d, 0x72, 0xe5, 0x4e, 0xaa, 0xa4 };
+static const GUID FOLDERID_Documents = { 0xfdd39ad0, 0x238f, 0x46af, 0xad, 0xb4, 0x6c, 0x85, 0x48, 0x03, 0x69, 0xc7 };
+static const GUID FOLDERID_Pictures = { 0x33e28130, 0x4e1e, 0x4676, 0x83, 0x5a, 0x98, 0x39, 0x5c, 0x3b, 0xc3, 0xbb };
+#endif
+
 //===========================================================================
 //
 // IsProgramDirectoryWritable

src/win32/i_system.cpp

@@ -1314,7 +1314,7 @@ static HCURSOR CreateCompatibleCursor(FTexture *cursorpic)
 	HDC dc = GetDC(NULL);
 	if (dc == NULL)
 	{
-		return false;
+		return nullptr;
 	}
 	HDC and_mask_dc = CreateCompatibleDC(dc);
 	HDC xor_mask_dc = CreateCompatibleDC(dc);
@@ -1721,7 +1721,7 @@ FString I_GetLongPathName(FString shortpath)
 	using OptWin32::GetLongPathNameA;
 
 	// Doesn't exist on NT4
-	if (!GetLongPathName)
+	if (!GetLongPathNameA)
 		return shortpath;
 
 	DWORD buffsize = GetLongPathNameA(shortpath.GetChars(), NULL, 0);