On Thu, May 28, 2026 at 08:37:45AM +0800, Qian Yun wrote:
> On 5/28/26 8:33 AM, Dima Pasechnik wrote:
> > On Wed, May 27, 2026 at 6:22 PM Qian Yun <[email protected]> wrote:
> >>
> >> On 5/28/26 6:27 AM, Dima Pasechnik wrote:
> >>>>
> >>>> - make it easier for external programs to interface with FriCAS
> >>>>
> >>>> (especially sagemath. The call-lisp-from-c interface seems brittle.)
> >>> SageMath doesn't do call-lisp-from-c in the case of fricas (it uses
> >>> pexpect, that's sockets/pipes, more or less),
> >>> and that's actually what makes it more brittle than SageMath's main
> >>> interface with maxima, which is call-lisp-from-c.
> >>>
> >>> For the latter, fricas needs to be packaged as ecl .fas file, to be
> >>> loaded by ecl, among with other things on our side.
> >>>
> >>> Dima
> >>>
> >>>
> >>
> >> Yes, current fricas-sage interface is pexpect based.
> >>
> >> Each lisp has different call-lisp-from-c interface, which is
> >> a bit messy, unlike call-c-from-lisp interfaces.
> >>
> >> About ECL interface, my understanding is that it can only
> >> load one .fas at a time, so that fricas and maxima can't coexist?
> >
> > On the ecl side, ecl certainly can load multiple .fas files. E.g.
> >
> > (require 'maxima)
> > (require 'foobar)
> >
> > loads maxima.fas and foobar.fas.
> >
> > SageMath interface would need adjustments and a refactoring,
> > certainly, as it wasn't designed to handle FriCAS,
> > but I don't see real issues there.
> >
> > Dima
> >
>
>
> I mean, in ./src/sage/interfaces/maxima_lib.py :
>
> Only one instance of this interface can be instantiated,
> so the user should not try to instantiate another one,
>
> So there can be only one (ecl-python) interface working at a time?
It look so. However, FriCAS and Maxima can live in different
packages and probably could even use different threads, so this
is really not a limitation.
--
Waldek Hebisch
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