dbouce.so: cannot open shared object file

I almost forgot this topic but I should post at least what was wrong:

In fact dbounce.so was missing. Adding the module solved the problem. Besides I know two more cases with missing dbounce.so. At least in one case it was LCNC 2.8.4, like in my case. Is it possible that in 2.8.4 this module is simply missing?

Kind regards,
Tilman

It is in the source:

github.com/LinuxCNC/linuxcnc/blob/2.8/sr...ponents/dbounce.comp