[ECOS] Pb and Workaround with tracing

[Fabrice Gautier <Fabrice_Gautier at sdesigns dot com>]

Hi,

As noticed in the thread about "tracing and debug" there is a building
problem if you don't choose buffered tracing. In fact the problem is if You
choose tracing but you don't choose any output module (null, simple or
fancy) nor buffered output.
In this case you end up with undefined references.

So pick one of the ouput module and it will build just fine.

Thanks

A+
-- 
Fabrice Gautier
fabrice_gautier@sdesigns.com