The goal is to provide an homogenenous build interface for projects using many different build systems.
For example, libav can use librtmp and JACK.
* libav currently uses a hand-written 'configure' script (mostly autoconf compatible).
* librtmp uses a hardcoded Makefile
* JACK uses the 'waf' build system.

One can build libav this way:
./zenbuild.sh /tmp/work x86_64-w64-mingw32 libav

The build will fetch and build dependencies to a temporary directory, and install them to a temporary cross-architecture prefix directory.

This project can currently build:
- ffmpeg
- libav
- portaudio
- libjack
- librtmp
- winpthread
- x264