OPAMSWITCH appears undocumented, though it's referred to in the man page
under opam --switch ("This is equivalent to setting $OPAMSWITCH")

My question is, if I set OPAMSWITCH, will I then be able to run regular
(non-opam) ocaml build commands in the local shell in the given compiler,
while running commands in a different shell with a different compiler? If
not, is such a feature planned?

-Yotam

On Thu, Sep 18, 2014 at 5:24 PM, Anil Madhavapeddy <anil@recoil.org> wrote:

> On 18 Sep 2014, at 22:20, Yotam Barnoy <yotambarnoy@gmail.com> wrote:
>
> > I have a question about opam. I would like to play with certain compiler
> versions, but I don't want the switch to happen globally, because I still
> need to compile regular code. Is it possible to switch to another compiler
> locally (within a particular shell session) via environment variables,
> while using my regular compiler in another shell session?
> >
> > If this is the way things work already, I apologize in advance -- it
> appeared to me that running opam switch modifies some global state that
> directly affects other pre-existing shell sessions.
>
> It's worth reading the man page for OPAM ("man opam" or "opam --help"),
> which lists all the environment variables and command-line options
> available.
>
> There is OPAMSWITCH (or the command line --switch option) which will fix a
> particular switch to run the opam command set in.
>
> best,
> Anil
>
>