Hi Aurélien
Try again:
visit
http://lv2plug.in/trac/browser/trunk
click the link to download a zip-file (bottom middle)
extract
instead of
waf configure
run:
./waf configure
from root directory of the zip (trunk), not from core.lv2 directory.
then:
./waf build -j4
then:
sudo ./waf install
then:
sudo lv2config
(assuming a debian based distro)
--
E.R.