我在安装rabbitmq php扩展的时候发现
configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.
于是百度找解决方法
wget https://sourceforge.net/projects/re2c/files/0.16/re2c-0.16.tar.gz tar zxf re2c-0.16.tar.gz && cd re2c-0.16 ./configure make && make install
解决configure: WARNING: You will need re2c 0.13.4 or later
原文：https://www.cnblogs.com/wanglijun/p/9451020.html