configure: error: * libmcrypt was not found

configure: error: *** libmcrypt was not found

configure: error: *** libmcrypt was not found

为了的到mcrypt.so库文件，先后安装编译了mhash和libmcrypt，但是到最后编译mcrypt时报错：

configure: error: *** libmcrypt was not found

最后发现是因为环境变量的问题，gcc编译的时候根据自身定义的变量寻找相关函数库等文件，libmcrypt也是刚安装的，在变量中没有定义出来，所以手动添加：

[root@localhost modules]# export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

再次编译即可。