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lldb的插件不太会用，因此尝试在macOS上安装一下gdb，还是遇到很多问题，暂且记录一下。很快brew应该就更新了，到时直接brew  install gdb即可。

20181212最终安装方案：

brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/cb7a4c1b8e52220ed8d5d382268e5a36fad99815/Formula/gdb.rb --HEAD

方法二（未尝试），切换到gdb8.0.1 

给gdb签名

- https://www.jianshu.com/p/ce2d77d7d1c4

注：我使用 codesign -v /usr/local/bin/gdb 代码签名后，还是会遇到错误，暂时未解决，所以我是sudo gdb启动程序的。如果有解决的同学麻烦评论告诉我～

Unable to find Mach task port for process-id 1481: (os/kern) failure (0x5).(please check gdb is codesigned - see taskgated(8))

最终的gdb版本

➜  ~ gdbGNU gdb (GDB) 8.2.50.20181212-gitCopyright (C) 2018 Free Software Foundation, Inc.License GPLv3+: GNU GPL version 3 or later 
   
    This is free software: you are free to change and redistribute it.There is NO WARRANTY, to the extent permitted by law.Type "show copying" and "show warranty" for details.This GDB was configured as "x86_64-apple-darwin18.2.0".Type "show configuration" for configuration details.For bug reporting instructions, please see:
    .Find the GDB manual and other documentation resources online at:    
    .For help, type "help".
   

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