Quoting Lev Lamberov (2022-09-06 14:00:55)
> Hi Jonas,
> 
> Сб 03 сен 2022 @ 21:19 Jonas Smedegaard <jo...@jones.dk>:
> 
> >> The autopkgtest caught that the package is not functional on !amd64:
> >> 
> >> (buster_arm64-dchroot)bunk@amdahl:/tmp$ eye.pvm 
> >> /usr/bin/eye.pvm: 3: exec: /usr/lib/swi-prolog/bin/x86_64-linux/swipl: not 
> >> found
> >> (buster_arm64-dchroot)bunk@amdahl:/tmp$ 
> >> 
> >> Changing Architecture: from "all" to "any" might be a reasonable option.
> >
> > In my understanding, this is a bug in SWI Prolog, in that when
> > generating a so-called "intermediate code file" it embeds an
> > arch-specific path to the interpreter instead of the arch-independent
> > symlink in PATH: /usr/bin/swipl
> >
> > @Lev: What do you think?  Is it possible to patch SWI Prolog to embed an
> > architecture-agnostic path for executing intermediary files?
> 
> SWI-Prolog supports three different pre-compiled formats: qlf, boot.prc,
> and user created states. The first two do not include paths to the
> interpreter. Looks like eye relies on the third one. I've asked upstream
> about the possibility to embed an arch-independent path to such user
> created states and got the answer that sometimes it is not a good idea,
> because these states may differ due to conditional compilation. I've
> looked into eye and looks like it does not (at least curretly, or I was
> not able to spot it) use conditional compilation on various
> architectures. So, I think it is probably save to embed arch-independent
> path to the interpreter. SWI-Prolog upstream pushed a commit to support
> this feature, but one should enable it explicitely with a command-line
> option when running swipl to generate pre-compiled file of this kind
> (like, swipl -o myexe --emulator=/usr/bin/swipl -c mycode.pl). I will
> add this patch to the swi-prolog in Debian in the near future (probably,
> I will have some time for it on the coming weekend, also I plan to
> finish packaging a new upstream stable release, 8.4.3, where Debian is
> at 8.4.2 at this point). I'll let you know when you can experiment with
> eye concerning this change.

Cool!  Thanks a lot!


 - Jonas

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

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