升级autoconf版本 Autoconf version 2.68 or higher is required
慕容文昌
curl -O http://mirrors.kernel.org/gnu/autoconf/autoconf-2.71.tar.gz
tar -xzvf autoconf-2.71.tar.gz
cd autoconf-2.71
./configure --prefix=/usr/local # ironic, isn't it?
make
sudo make install
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