「configure: error: mcrypt.h not found. Please reinstall libmcrypt.」解決方法
エラーメッセージ：
configure: error: mcrypt.h not found. Please reinstall libmcrypt.
解決方法：
wget ftp://mcrypt.hellug.gr/pub/crypto/mcrypt/attic/libmcrypt/libmcrypt-2.5.7.tar.gz
tar -zxvf libmcrypt-2.5.7.tar.gz
cd libmcrypt-2.5.7
./configure
make
make install