Well, I'm still confused.  Consider that a bunch of the standard
libraries use Pervasives, but I can see that the standard library
is not compiled with -thread.  So clearly we are meant to use the
standard library compiled without -thread, with threads.cm[x]a.

So, I still don't understand when I can combine code compiled
without -thread with code compiled with -thread.

-Trevor


Jonathan Roewen wrote:
> Oh wait, I'm sorry. Yes, there is good reason: it uses a different
> version of Pervasives internals.
> 
> Depending on when linking is done for each part, you may end up with
> conflicting implementations of Pervasives in your final program: so
> [IO] operations that can block will block whole program instead of
> running thread blocking, and another thread running instead.
> 
> So maybe if it uses no IO, and no threading functions, it might be
> okay -- there are no guarantees when you do these sorts of things (:
> 
> Jonathan