使用firebase_auth时Flutter Windows构建失败：encodable_value.h中std::variant错误

报错信息 #

C:\Users\Gabriel\Downloads\Projects\mcpark-update\mcpark\windows\flutter\ephemeral\cpp_client_wrapper\include\flutter\encodable_value.h(199,60): error C2665: 'std::variant<std::monostate,bool,int32_t,int64_t,double,std::string,std::vector<uint8_t,std::allocator<uint8_t>>,std::vector<int32_t,std::allocator<int>>,std::vector<int64_t,std::allocator<int64_t>>,std::vector<double,std::allocator<double>>,flutter::EncodableList,flutter::EncodableMap,flutter::CustomEncodableValue,std::vector<float,std::allocator<float>>>::variant': no overloaded function could convert all the argument types

已尝试的解决步骤 #

• 修改动态生成的encodable_value.h文件：移除文件中std::variant声明里的std::vector<float,std::allocator<float>>，路径为：

  C:\Users\Gabriel\Downloads\Projects\mcpark-update\mcpark\windows\flutter\ephemeral\cpp_client_wrapper\include\flutter\encodable_value.h
  

• 修改Flutter SDK内的encodable_value.h文件：同样移除std::variant声明里的std::vector<float,std::allocator<float>>，路径为：

  C:\Users\Gabriel\flutter_windows_3.19.6-stable\flutter\bin\cache\artifacts\engine\windows-x64\cpp_client_wrapper\include\flutter\encodable_value.h
  

• 强制启用C++17标准：在项目的CMakeLists.txt中添加以下配置

  set(CMAKE_CXX_STANDARD 17)
  set(CMAKE_CXX_STANDARD_REQUIRED ON)
  

• 降级firebase_auth版本：先后尝试了^4.16.0和^5.3.4版本，问题未解决
• 重新安装依赖与工具：删除并重新安装Flutter SDK 3.19.6版本；确认Visual Studio 2022已安装MSVC v143构建工具、Windows 11 SDK(10.0.22621.0)和C++ CMake工具

问题说明 #

该问题仅在Windows平台构建时出现，移动端构建无异常。

环境详情 #

• Flutter: 3.19.6
• Dart: 3.3.4
• firebase_auth: 已尝试^4.16.0和^5.3.4版本
• Visual Studio: 2022（已安装所需组件）
• OS: Windows 11

内容的提问来源于stack exchange，提问作者Gabriel Tavares