Mac OS X specific notes
On Mac OS X, Slag only works with JACK, not with libao. So you have to install JackOSX from http://www.jackosx.com/ before you build and use Slag.
To build from source, I had to set the QMAKESPEC environment variable to "macx-g++".
The main Makefile includes 2 specific targets for Mac OS X. In order to make an staically linked application bundle called slag.app, type the command :
$ make bundle
There is also a "mac_pkg" target which makes a bziped tar archive of the bundle. Slag will be statically linked with libsndfile, libsamplerate, and Qt3, but still dynamically to libjack, since users must install JACK to use Slag anyway.
You can also get a precompiled bundle archives from :
http://download.savannah.gnu.org/releases/slag/