http://mirrors.kernel.org/gnu/m4/
tar -xzvf m4-1.4.18.tar.gz
cd m4-1.4.18
./configure –prefix=/usr/local
make && make install
https://alpha.gnu.org/pub/gnu/autoconf/
http://ftp.gnu.org/gnu/autoconf
tar -xzvf autoconf-2.65.tar.gz
cd autoconf-2.65
https://blog.csdn.net/qq_35792159/article/details/101336129
http://www.htmltoo.com/
