cannot compile last 0.7.9 snapshot

Hello,

I'm trying to compile the last snapshot of gforth (0.7.9_20180517) on my
equipment (Linux Mint, 64 bits).
All seems to go well until at one point the configure script complains that
I don't have a forth-enabled swig. So I downloaded the current version of
swig (3.0.12) and installed it. I could not find any forth related option
in swig but installed it anyway.
However gforth configure keeps complaining.

So my question is: how do I configure swig for gforth? I could not find
anything about this in the net.

Thanks
Tom