Hi Matthias,

the two logs are at https://users.fmi.uni-jena.de/~king/logs/

Best regards,
Simon

On 2021-08-29, Matthias Köppe <[email protected]> wrote:
> Singular vendors a part of gfan called gfanlib. Perhaps an installation of 
> that is leaking into your build.
>
> If you can share your top-level config.log and the full gfan build log, we 
> can take a closer look.
>
> On Sunday, August 29, 2021 at 11:50:32 AM UTC-7 Simon King wrote:
>
>> Hi Matthias,
>>
>> On 2021-08-29, Matthias Köppe <[email protected]> wrote:
>> > On Sunday, August 29, 2021 at 5:44:33 AM UTC-7 Dima Pasechnik wrote:
>> >
>> >> is gfan partially taken from the system? 
>> >>
>> >> probably. Ubuntu 16.04 has gfan version 0.5, but Sage needs 0.6.2. 
>> >> A system-wide install of old gfan might get in the way.
>> >
>> > No, that alone cannot explain it -- we test this configuration. 
>> > ubuntu-xenial-standard installs the system gfan, then rejects it, then 
>> > correctly builds gfan.
>>
>> What could explain it? Is there a typical application that I might have
>> installed and depends on gfan? I mean, it is for Groebner fans. So, what
>> *non-mathematical* software would use it? I don't think that I installed
>> a mathematical software after the last successful build of Sage.
>>
>> Should I try to uninstall gfan, re-install it, and try again? And,
>> if that fails, uninstall and NOT re-install, but build Sage and hope
>> that it provides a working gfan?
>>
>> Best regards,
>> Simon
>>
>>
>

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