asterisk: module load warnings

[Mayuresh <mayuresh%acm.org@localhost>]

Tried this with comm/asterisk18 as well as comm/asterisk10.

On launching asterisk, the log file shows a number of warnings about not
being able to load modules. General pattern of the warnings is as follows:

[Apr  8 21:37:54] WARNING[18938] loader.c: Module 'chan_oss.so' does not
provide a description.
[Apr  8 21:37:54] WARNING[18938] loader.c: Module 'chan_oss.so' could not
be loaded.

From the messages (first one), I don't think it's a problem with finding
the module. Also checked that in asterisk.conf the modules directory path
is correct.

Is there anything else missing in the setup?

Mayuresh.