question about configuration options for BSD systems

[Matthieu Herrb]

Hi,

the X server on BSD systems has support for the various console drivers 
that are available (syscons, pcvt, wscons, pccons). In the monolitic 
tree, the *BSD.cf files define which drivers should be supported when 
building on a specific OS release.

So I need to transpose that to the automake/autoconf infrastructure, 
which means adding some --with-{syscons,pcvt,...}-console options to 
configure. But since those options are BSD specific, it would probably 
be good to have them available only on BSD systems (And the same goes 
for other build options that may be specific of other operating systems).

Any idea or recommendation on how to implement that ?
-- 
Matthieu Herrb