rust开发环境

win之下：

常见问题1：

please ensure that VS 2013, VS 2015, VS 2017 or VS 2019 was installed with the Visual C++ option

最便捷的解决方案：

rustup uninstall toolchain stable-x86_64-pc-windows-msvc
rustup toolchain install stable-x86_64-pc-windows-gnu (or download rustup-init for the platform of your choice at https://forge.rust-lang.org/infra/other-installation-methods.html)
rustup default stable-x86_64-pc-windows-gnu