[racket-dev] having zo files from two versions

I see. If you compile with v5.2.1 first, then it puts files immediately
in "compiled", and those will be found by v6.1.

If you compile v6.1 first, then the files go in a subdirectory of
"compiled", and they won't interfere with v5.2.1, while v6.1 will
continue to find the files in the subdirectory. That's what I tried, so
I didn't think of the problem with the other order.

Were you able to solve this by compiling with v6.1 first? Or some other
approach?

At Tue, 6 Jan 2015 15:04:40 -0800, Dan Liebgold wrote:
> Ok, that seems to be exactly what I'm looking for -- however I tried it and
> it eventually seems to wind up using just the "compiled" path during raco
> setup.
> 
> Example output is here (I've echoed PLTCOMPILEDROOTS at the top, and note
> this is under windows): http://pasterack.org/pastes/45913
> 
> Is that enough context to see the issue?
> 
> On Tue, Jan 6, 2015 at 11:58 AM, Matthew Flatt <mflatt at cs.utah.edu> wrote:
> 
> > At Tue, 06 Jan 2015 14:14:22 -0500, Neil Van Dyke wrote:
> > > Dan Liebgold wrote on 01/06/2015 02:00 PM:
> > > > What is a straightforward way to designate the "compiled" directory to
> > > > look for zo files in that can be based on the Racket version?  I'd
> > > > like to have Racket 5.2.1 and 6.1 running in parallel to aid in
> > > > upgrading our version.
> > > > Thanks!
> > >
> > > I'd like for this to be the default behavior for Racket.
> > >
> > > One possible way: Insert a directory level between the `compiled`
> > > directory and its contents, with the directory named with the Racket
> > > version number with which the code is compiled.  Only that Racket
> > > version will run that compiled code.
> >
> > Although it's not the default, you can get that behavior by setting the
> > `PLTCOMPILEDROOTS` environment variable to
> >
> >  compiled/@(version):
> >
> > The trailing ":" allows compiled files to be found in "compiled" in the
> > installation, while newly generated ".zo" files are put in a
> > version-specific subdirectory.
> >
> > See also
> >
> >  http://lists.racket-lang.org/dev/archive/2012-September/010386.html
> >
> >
> 
> 
> -- 
> Dan Liebgold    [dan.liebgold at gmail.com]