[tor-bugs] #32455 [Core Tor/Tor]: Run "make doxygen" in a travis builder

[Tor Bug Tracker & Wiki]

#32455: Run "make doxygen" in a travis builder
-------------------------------+--------------------------------
     Reporter:  nickm          |      Owner:  (none)
         Type:  task           |     Status:  new
     Priority:  Medium         |  Milestone:  Tor: 0.4.3.x-final
    Component:  Core Tor/Tor   |    Version:
     Severity:  Normal         |   Keywords:  doxygen tor-ci
Actual Points:                 |  Parent ID:
       Points:  .3             |   Reviewer:
      Sponsor:  Sponsor31-can  |
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 With #32385, we now have --enable-fatal-warnings behave sensibly with
 doxygen warnings.  We can prevent ourselves from introducing new doxygen
 warnings by having a travis builder that does "make doxygen".

 This won't apply to warnings about missing documentation: those are off by
 default, since we have a few thousand of them.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32455>
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