for built-in image view support, and libcompface for X-Face support.
-If you want to enable multithread support, append the option
---enable-threads after ./configure.
-
-WARNING: Multithread support is still in an experimental stage, and it
- DOESN'T work correctly. DON'T use it unless you want to hack it.
-
If you want to enable IPv6 support, append the option
--enable-ipv6 after ./configure.