TODO list:

$ ac-requires pwlib
asterisk-1.2.7.1-4
callgen323-1.2.6-9
ekiga-2.0.1-1
opal-2.2.1-2
openam-1.13.5-3
opengk-1.13.5-3
openh323-1.18.0-1
openivr-1.13.5-3
openmcu-2.1.1-1
pwlib-devel-1.10.0-1
pwlib-sound-alsa-1.10.0-1
pwlib-sound-oss-1.10.0-1
pwlib-video-avc-1.10.0-1
pwlib-video-dc-1.10.0-1
pwlib-video-v4l-1.10.0-1
pwlib-video-v4l2-1.10.0-1

build order:

1. pwlib
2. opal
3. openh323
   1. callgen323