Brew命令报错问题解决

运行任何`brew`命令，都提示错误

1	git: error: unable to find utility "git", not a developer tool or in PATH

1	clang: error: unable to find utility "clang", not a developer tool or in PATH

原因主要是因为xcode-select的位置错误，需要修改指向的位置：
原来的位置：

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# taoyi @ TaoYi-Mac in ~/Desktop/MySQL-python-1.2.5 [13:27:05] C:72
$ xcode-select --print-path
/Applications/Xcode.app/Contents/Developer

修改到另一个位置：

# taoyi @ TaoYi-Mac in /Applications/Xcode.app/Contents/Developer [13:33:33] C:1
$ sudo xcode-select --switch /Library/Developer/CommandLineTools
Password:

# taoyi @ TaoYi-Mac in /Applications/Xcode.app/Contents/Developer [13:33:52] 
$ xcode-select --print-path                                     
/Library/Developer/CommandLineTools

如此操作之后，再执行brew命令，就不会再报上面的错了

运行任何brew命令，都提示错误

运行任何`brew`命令，都提示错误