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Re: Issues with ubuntu 18.04
From: |
Salvador Abreu |
Subject: |
Re: Issues with ubuntu 18.04 |
Date: |
Mon, 29 Mar 2021 13:52:52 +0100 |
that bug is fixed in the current distribution, e.g. package version 1.4.5.0-3
it's in the current LTS (20.4)
best,
-spa
> On 26 Mar 2021, at 07:56, Paulo Moura <pmoura@mac.com> wrote:
>
> The Ubuntu .deb package is broken. You need to compile and install GNU Prolog
> from sources.
>
>> On 25 Mar 2021, at 21:25, Jerry Hancock <jerry@hanler.com> wrote:
>>
>> Hello,
>>
>> Please excuse me for asking about something so old. I installed gnu-prolog
>> 1.4.5 on ubuntu server 18.04. The underlying hardware is an HP dl380 with
>> at least 24 cores. I had some code that runs perfectly but slowly on other
>> servers so I thought I would try my cloud server.
>>
>> The test code is simple and instantiated in sit3.pl:
>>
>> c(blue).
>> c(green).
>>
>> sit3(X):-c(X).
>>
>> On my other installations, the first solution X=blue is returned as
>> expected.. On the ubuntu server 18.04 , I get an error, "uncaught exception
>> error(existence_error(procedure,c/0),sit3/0) “ implying that c/0 doesn’t
>> exist but I’m not calling c/0 I’m calling c/1 as below:
>>
>> {trace}
>> | ?- sit3(X).
>> 1 1 Call: sit3(_24) ?
>> 2 2 Call: c ?
>> 2 2 Exception: c ?
>> 1 1 Exception: sit3(_24) ?
>> uncaught exception: error(existence_error(procedure,c/0),sit3/0)
>> {trace}
>> | ?-
>>
>> If I assert the clauses from the terminal, all is well.
>>
>> If I run c(X), trace returns:
>>
>> | ?- c(X).
>> 1 1 Call: c(_24) ?
>> 1 1 Exit: c(blue) ?
>>
>> X = blue ?
>>
>> Or
>>
>> | ?- asserta(cc(blue)).
>>
>> yes
>> | ?- asserta(cc(green)).
>>
>> yes
>> | ?- asserta((sit33(X):-cc(X))).
>>
>> yes
>> | ?- sit33(X).
>>
>> X = green ?
>>
>>
>> This is a very simple example that should work. I’ve been working with
>> prolog since the late 80’s and unless there is an ini file that is note
>> allowing the clauses to be added correctly, I could't find it.
>>
>> Thanks
>
>