执行到./configure --enable-shared一步时提示:
checking host system type... Invalid configuration `x86_64-unknown-linux-gnu ‘: machine `x86_64-unknown ‘ not recognized

解决办法：
cp /usr/share/libtool/config.guess .  (覆盖到相关软件自带的config.guess,t1lib在解压包的ac-tools下)
cp /usr/share/libtool/config.sub .     (覆盖到相关软件自带的config.sub)
./configure --enable-shared --enable-static
make libdir=/usr/lib64
make libdir=/usr/lib64 install
使用64位函数库编译.

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