In most distributions (at least the very common ones) kismet is provided as a package with all its dependencies and can be downloaded and installed right away via the distribute-own package manager.
A manual compiling is of course, possible as well.
Note:
Before compiling, make sure to have libcap installed on your system.
<sxh bash;> ~:$ wget http://kismetwireless.net/code/kismet-2013-03-R1b.tar.xz ~:$ tar xfv kismet-2013-03-R1b.tar.xz ~:$ cd kismet-2011-03-R2 ~:$ ./configure ~:$ make install </sxh>
<sxh bash;> ~:$ pacman -Syyu ~:$ pacman -S kismet </sxh>