Since a lot of people were at POPL last week, I think it's worth
pinging this list again.

Does anyone have a solution to the problem stated in the previous email?

Namely, is there a way to either create a top-level variable that
persists until the VM dies, get a list of all dynamically linked
libraries, or require a module implemented in C who's module name
differs from it's file name?

Thank you.

Thank you.

~Leif Andersen


On Tue, Jan 19, 2016 at 3:20 PM, John Clements
<cleme...@brinckerhoff.org> wrote:
>
>> On Jan 19, 2016, at 11:14 AM, Leif Andersen <l...@leifandersen.net> wrote:
>>
>> Is it possible to either create a variable that persists until the
>> Racket VM shuts down or get a list of all of the libraries that are
>> shared libraries that are currently being linked against the racket
>> vm?
>
> I can’t help you. But! This reminds me of a closely related problem that 
> occurs with the `rsound` library.
>
> The rsound library contains shared libraries. Running rsound programs 
> performs dynamic linking against these libraries.
>
> When students try to upgrade the package, terrible things happen; the update 
> tries to replace the file, and the OS won’t allow it, because the dynamic 
> library is still linked. This leaves things in a half-installed state from 
> which (IIRC) it’s difficult to recover. If there were a way to enumerate 
> currently-linked shared libraries, the update could simply refuse to run, 
> which would be a substantial improvement.
>
> CAVEAT: I haven’t tested this in the last two years. Please forgive me if 
> this problem has already been resolved.
>
> Thanks!
>
> John
>
>
>

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