Libconfig uses GNU autoconf configure scripts to build and should build on
almost any platform.
Building it should be as easy as:
$ make install
(note that `make' must not be BSD make, all other makes work fine.)
* libopennet (http://www.rkeene.org/oss/libopennet/)
Libopennet allows URLs to be opened as easily as files, if it is
available (and the --without-libopennet argument isn't passed to
the `configure' script) libconfig will be able to process config
files that are passed as URLs.