Cmake_generotor support has been added to enable multi-version VS support (#20755)

cmake/external/protobuf.cmake

@@ -198,7 +198,9 @@ FUNCTION(build_protobuf TARGET_NAME BUILD_FOR_HOST)
         SET(OPTIONAL_CACHE_ARGS "-DZLIB_ROOT:STRING=${ZLIB_ROOT}")
     ENDIF()
     IF(WIN32)
-        SET(OPTIONAL_ARGS ${OPTIONAL_ARGS} "-DCMAKE_GENERATOR_PLATFORM=x64")
+        SET(OPTIONAL_ARGS ${OPTIONAL_ARGS} 
+            "-DCMAKE_GENERATOR=${CMAKE_GENERATOR}"
+            "-DCMAKE_GENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}")
     ENDIF()
 
     SET(PROTOBUF_REPO "https://github.com/protocolbuffers/protobuf.git")

cmake/external/xxhash.cmake

@@ -32,7 +32,8 @@ if(WIN32)
                       -DCMAKE_VERBOSE_MAKEFILE:BOOL=OFF
                       -DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=ON
                       -DBUILD_XXHSUM=OFF
-          -DCMAKE_GENERATOR_PLATFORM=x64
+                      -DCMAKE_GENERATOR=${CMAKE_GENERATOR}
+                      -DCMAKE_GENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}
                       -DBUILD_SHARED_LIBS=OFF
                       ${OPTIONAL_CACHE_ARGS}
       TEST_COMMAND      ""