Use UTF-8 for MSVC source and execution charset (#6876)

CMakeLists.txt

@@ -651,6 +651,9 @@ IF(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
 	ELSE(WIN32)
 		SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -DPIC")
 	ENDIF(WIN32)
+elseif(MSVC)
+	# Use UTF-8 as the source and execution character set
+	add_compile_options("/utf-8")
 ENDIF()
 
 # add enabled sanitizers