在执行 rustc 命令时出现以下错误提示，说明 Visual Studio C++ Build tools 没有安装。
E:\rust>hello_word>rustc main.rs error: linker `link.exe` not found | = note: 系统找不到指定的文件。 (os error 2) note: the msvc targets depend on the msvc linker but `link.exe` was not found note: please ensure that VS 2013, VS 2015, VS 2017 or VS 2019 was installed with the Visual C++ option error: aborting due to previous error