It seems that pkgtools/x11-links does not include libXpm.so.
This causes kinput2 to fail on Linux, you can't link it:
/usr/bin/ld: cannot find -lXpm

Looking into /usr/pkg/share/x11-links/lib shows that there's no
libXpm.so, but in /usr/X11R6/lib, there is.

Symlinking it manually didn't help.
Is this a bug or am I doing something wrong?

-- 
Jonathan