libmcrypt and php

Good morning, I tried to compile php with libmcrypt 2.5.7. First, on the php web site documentation, it's wrtten taht we have to compile libmcrypt using --diable-posix-threads. If I look at ../configure --help of libmcrypt, this option ino longer avaliable. After, when I compile PHP, I always got the message at the make execution. /usr/bin/ld: cannot find -lltdl collect2: ld returned 1 exit status make: *** [libphp4.la] Erreur 1 This is my configure options: ./configure --with-xml --with-pcre --with-pear --with-ftp --with-curl --with-openssl=/usr/local/ssl --with-config-file-path=/etc --enable-sockets --with-apxs2=/usr/local/apache-2.0.48/bin/apxs --with-mysql --with-mcrypt If I remove --with-mcrypt, all is Ok! Did someone can help me? Thanks Martin