LinuxMusicians

Carla can't find it, I've put it in /usr/lib/vst

There is already FooYC20.so there, and it is seen by Carla on refresh, but not Tunefish. Is there anything special to do besides unpacking the Tunefish archive in the directory ?

Yep, I tried to put it into my home .vst, no changes

It needs Glibc 2.15, where I'm running a Debian Wheezy Stable with Glibc 2.13. Too bad At least it is not Carla
The upgrade is doable but appears to be a little bit dangerous...

I moved for Wheezy to Jessie without problems : glibc in Wheezy is too old.