Since this thread turns out out be a kind of tutorial, here some completion of the information:
ad_returnfile_background is part of
xotcl-core and has the following requirements
- xotcl-core (sure, if it is defined there)
- one needs either a "new" aolserver, or
an "old" with the required patches (see discussion above and Boost...), and
- one has to have libthread installed (tcl thread library,
as described in the request-monitor wiki page)
If you have e.g. only (1), you will have as well a function named
ad_returnfile_background, but this will just call
ns_returnfile.
Hope this helps
-gustaf neumann
