CentOS升级autoconf，解决“Autoconf version 2.67 or higher is required”错误
autoconfconfigure.ac:8: error: Autoconf version 2.67 or higher is required configure.ac:8: the top level autom4te: /usr/bin/m4 failed with exit status: 63查询当前版本rpm -qf /usr/bin/autoconfautoconf-2.63