Hello,
In order to get a sucessful make, i have added a directory "alsa" in
source folder (gdigi folder) and made inside it a symbolic link to the
asoundlib.h located in my usr/include/sys folder.
the full sequence to get gdigi to work is
hg clone
http://hg.atheme.org/users/desowin/gdigi/ gdigi
cd gdigi
mkdir alsa
cd alsa
ln -s /usr/include/sys/asoundlib.h
make
this should work.
you must plug usb connector (and power on rp500) before launching
gdigi.
Have fun