>   | Yes, it is not right, but there is no other way to test for the
>   | feature short of autoconf like methods.
    :
> Something similar to the __NetBSD_Version__ value from <sys/param.h>
> that related to the userland setup, though perhaps it could be more of

 We can define OSMajorVersion, OSMinorVersion, OSTeenyVersion in
xc/config/cf/site.def, according to userland version.
Without these defines, imake determine these values by uname(3).
uname(3) ofcource returns kernel version. imake might should be changed
to use sys/param.h instead of uname(3).

-mochid