升级系统后homebrew的几种报错

homebrew安装软件 报错xcrun: error: invalid active developer path

解决方法，重装xcode command line：

xcode-select --install

sudo xcode-select -switch /

homebrew安装软件 报错/usr/local/Cellar is not writable

sudo chown -R $(whoami) /usr/local/Cellar

homebrew安装软件 报错 Library not loaded: /usr/local/lib/libx264.142.dylib

brew doctor