[tor-bugs] #24612 [Core Tor/Tor]: Fix pretty printing of configure output for rust checks

[Tor Bug Tracker & Wiki]

#24612: Fix pretty printing of configure output for rust checks
------------------------------+---------------------------------
     Reporter:  isis          |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.3.2.x-final
    Component:  Core Tor/Tor  |    Version:  Tor: 0.3.2.1-alpha
     Severity:  Normal        |   Keywords:  tor-build, autoconf
Actual Points:                |  Parent ID:
       Points:  .1            |   Reviewer:
      Sponsor:                |
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 Right now we print:

 {{{
 […]
 checking for cargo... cargo
 checking rust crate dependencies... checking rust version... checking for
 library containing socket... none required
 […]
 }}}

 I think we're supposed to use `AC_MSG_RESULT` to print "yes" if the rust
 crate dependency checks go okay. After the "checking rust version" we
 should probably also print something indicating that the version was
 acceptible (I'd personally go for printing the version string, since it
 doesn't hurt to have that in the build logs).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24612>
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