Possible configuration Parameters Before one wants to compile AFD one needs to configure it. This can be done via the configure script in the AFD source directory src. If one calls ./configure with the parameter --help it list all possible parameters. Here follows a list of the most important parameters: --prefix= The directory where you wish to install AFD. Default will be /usr/local. --enable-ssl Enabling this will add HTTPS and FTPS support, TLS/SSL support for HTTP and FTP. Default is NOT enabled.