Følgende står i dokumentationen, ved ikke om det var hvad du ledte efter:
--with-largefile: support downloading of files larger than 2 gigabytes on
32-bit architectures. Transfering so huge files through FTP is a strange
idea. And your filesystem has to support it. Your kernel and your libc as
well. And of course, the FTP client has to be safe against large files, too.
And when this feature is enabled, downloads can be a bit slower (or more
cpu-intensive) than without it, due to a limitation of actual Linux kernels.
To summarize: don't enable this for fun, just if you are really planning to
download files over 2 gigabytes.
Ellers finder du dokumentationen her:
http://download.pureftpd.org/pub/pure-ftpd/doc/README