Add error when __cplusplus MSVC compiler option is not configured correctly.

include/bx/platform.h

@@ -42,7 +42,6 @@
 #endif // BX_CRT_NONE
 
 // Language standard version
-#define BX_LANGUAGE_CPP14 201402L
 #define BX_LANGUAGE_CPP17 201703L
 #define BX_LANGUAGE_CPP20 202002L
 #define BX_LANGUAGE_CPP23 202207L
@@ -445,10 +444,12 @@
 #endif // BX_ARCH_
 
 #if defined(__cplusplus)
-#	if   __cplusplus < BX_LANGUAGE_CPP14
-#		error "C++14 standard support is required to build."
-#	elif __cplusplus < BX_LANGUAGE_CPP17
-#		define BX_CPP_NAME "C++14"
+#	if defined(_MSVC_LANG) && _MSVC_LANG != __cplusplus
+#			error "When using MSVC you must set /Zc:__cplusplus compiler option."
+#	endif // defined(_MSVC_LANG) && _MSVC_LANG != __cplusplus
+
+#	if   __cplusplus < BX_LANGUAGE_CPP17
+#		error "C++17 standard support is required to build."
 #	elif __cplusplus < BX_LANGUAGE_CPP20
 #		define BX_CPP_NAME "C++17"
 #	elif __cplusplus < BX_LANGUAGE_CPP23