$(and) and $(or) not working

[Noel Yap]

I'm using the following:

yapn:address@hidden:~/proj/aoeu> make --version
GNU Make 3.81beta4
Copyright (C) 2003  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

This program built for i486-pc-linux-gnu


And the $(and) and $(or) functions always return empty.  Has anyone
else experienced this?

Thanks,
Noel