Include paths.

I see from the compiler sources, that when specifying -vmthreads, it
adds +vmthreads to the HEAD of the include paths.

When someone does -I on the command line, I assume these go at the
TAIL of the include paths?

And, because +vmthreads is at the head of the include path, it finds
stdlib.cma in +vmthreads directory BEFORE the standard include
directory, hence choosing the correct alternative implementation.

Is this how it works?

Sooo.... to make life simple for building apps targeting DST, I could
make a customised version of the compiler, adding say a "dst" flag
that specifies a different directory for a specialised implementation
of the standard libraries, and threads, etc?

And then, if DST ever takes off, could get integrated into the main
ocaml suite? ;D Heh heh heh....

Jonathan