'iftex' is required directly because of line 311 in src/doc/common/conf.py:
\usepackage{iftex}
This was added in https://trac.sagemath.org/ticket/22252, to compensate for
the fact that Sphinx no longer included it by default. The 'iftex' package
is part of TeXLive; I don't know about other TeX distributions.
John
On Saturday, April 29, 2017 at 3:52:49 AM UTC-7, Volker Braun wrote:
>
> I don't have iftex.sty installed (Fedora 25), so its not required
> directly. Your tex installation might (erroneously) have it as a transitive
> dependency, though. I'd try with a clean build first. Otherwise install the
> iftex package:
>
>
> $ tlmgr search --file iftex.sty
> iftex:
> texmf-dist/tex/generic/iftex/iftex.sty
>
>
>
>
> On Saturday, April 29, 2017 at 11:30:36 AM UTC+2, Daniel Krenn wrote:
>>
>> On 2017-04-29 11:27, Daniel Krenn wrote:
>> > Building the pdf version of the documentation e.g. for
>> > reference/asymptotic fails in the current beta (8.0.beta4). It also
>> > fails in 8.0.beta2, but works in 7.6.
>> >
>> > What can cause this?
>>
>> FYI, from the log:
>>
>> ! LaTeX Error: File `iftex.sty' not found.
>>
>>
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