libjpeg
http://www.ijg.org/
http://www.paginar.net/matias/articles/gd_x_howto.html#sct07
$ cp /usr/share/libtool/config.sub .
$ cp /usr/share/libtool/config.guess .
$ ./configure --enable-shared
$ make
$ sudo make install
$ sudo ranlib /usr/local/lib/libjpeg.a