compiling PHP error, please help (configure: error: libjpeg.(a|so) not found.)

The error I'm getting when running ./configure is this: configure: error: libjpeg.(a|so) not found. I know libjpeg is installed, I just installed it. Here is my ./configure: ./configure --with-mysql --with-apxs=/www/bin/apxs --with-xml --enable-ftp --with-gd --enable-magic-quotes --with-jpeg-dir=/usr/lib --with-mcrypt --with-png-dir=/usr --enable-sockets --enable-track-vars --enable-versioning --with-zlib --enable-bcmath --enable-calendar --with-xpm-dir=/usr/X11R6 Side question - if there's anything I'm missing in my ./configure that I should have in it, please let me know. This is my first from-scratch PHP install.