别骄傲，别怀恨，别不肯原谅人。——狄更斯

今天报错bison版本过低，我用mac的homebrew升级一下

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brew install bison

发现安装完毕环境变量不对，原来需要copy过去

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sudo cp /opt/homebrew/Cellar/bison/3.8.2/bin/bison ./bison

即可

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Github-Id-VampireAchao:test achao$ bison -V
bison (GNU Bison) 3.8.2
Written by Robert Corbett and Richard Stallman.

Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.