虽然不能理解，但是部分软件的确是这样要求的，那就要卸载 2.69 安装 2.64

查询当前安装的automake版本

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$ rpm -qf /usr/bin/autoconf
autoconf-2.69-11.el7.noarch

下载新版

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wget https://ftp.gnu.org/gnu/autoconf/autoconf-2.64.tar.gz
tar zxvf autoconf-2.64.tar.gz  
cd autoconf-2.64

安装新版

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./configure
make
make install

查看当前 autoconf 版本

无法查看则需要重新登陆 Shell 或重新打开一个 bash

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/usr/bin/autoconf -V  
autoconf (GNU Autoconf) 2.64
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David J. MacKenzie and Akim Demaille.

automake 等都可以参考该方法，更换版本