MSYS: fix CMake configure and build for MinGW

src/App/PropertyExpressionEngine.h

@@ -172,7 +172,7 @@ private:
     using DiGraph = boost::adjacency_list< boost::listS, boost::vecS, boost::directedS >;
     using Edge = std::pair<int, int>;
     // Note: use std::map instead of unordered_map to keep the binding order stable
-    #if defined(FC_OS_MACOSX) || defined(FC_OS_BSD)
+    #if defined(FC_OS_MACOSX) || defined(FC_OS_BSD) || defined(_LIBCPP_VERSION)
     using ExpressionMap = std::map<App::ObjectIdentifier, ExpressionInfo>;
     #else
     using ExpressionMap = std::map<const App::ObjectIdentifier, ExpressionInfo>;

src/Base/Builder3D.h

@@ -26,12 +26,9 @@
 
 // Std. configurations
 
-#ifdef __GNUC__
-#include <cstdint>
-#endif
-
 #include <sstream>
 #include <vector>
+#include <cstdint>
 #include <Base/Tools3D.h>
 #ifndef FC_GLOBAL_H
 #include <FCGlobal.h>