Henri,
I have been building from src lately so that I can pass --tune. With the src from
http://sldev.free.fr/sources/CoolVLViewer-src-126212.tar.bz2, I get the following:
This is a new warning for me in 1.26.21.2 and as such, prevents the build from completing. I have not yet checked the diff to verify what might have changed.