> I'm writing a commercial application in O'Caml.  We
> need to run on all the main platforms (Linux, Windows
> and Mac) and we'd like to use the native code compiler
> and threads.
> 
> My first question: does O'Caml support threads in
> compiled code in all the above platforms?

Linux: yes.
Windows: yes.
Mac: not yet by lack of (full) POSIX threads, but it is likely that
  future versions of MacOS X will have it.

> My second question: how do I get threads to work?  I'm
> currently developing on Linux and there is no
> threads.cmxa in my /usr/lib/ocaml (3.04 via Debian). 
> The O'Caml book suggests I need to download and
> compile my own ocamlopt including pthreads support. 
> Is this correct?

Yes.  There is a configuration-time choice between bytecode-only threads
and system threads (pthreads).  Depending on what the author of the
OCaml package chose, you may have to recompile from sources and select
system threads.

> What do I do for Windows?

Nothing!  The Windows port of OCaml uses system (Win32) threads, both
in bytecode and native-code.

Keep us informed with your commercial application.

- Xavier Leroy
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