From: Steve Elkins <sgelkins@bellsouth.net>

> Will someone please explain what I'm doing wrong, or tell me my build
> is broken, or enlighten me somehow.  I'm having trouble using threads
> in toplevels, but not when I compile to bytecode.
> 
>   sge:346$ ocamlmktop -custom -o strocaml str.cma                      

Which architecture (OS) are you working with?
Since ocaml 3.04, you don't need to build custom toplevels on
architectures where dynamic loading is supported.

$ ocaml
        Objective Caml version 3.04

# #load"str.cma";;
# Str.regexp;;
- : string -> Str.regexp = <fun>

This also works for threads, but not always:

$ ocaml -I +threads
        Objective Caml version 3.04

# #load"unix.cma";;
# #load"threads.cma";;

>   sge:350$ ./throcaml
>           Objective Caml version 3.04
> 
>   # Thread.create;;
>   Unbound value Thread.create

You need to add the +threads directory to your load path:
$ ./throcaml -I +threads

Cheers,

Jacques Garrigue
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