[tor-bugs] #32500 [Core Tor/Tor]: consider clang -std=gnu99 in Travis for better C99 portability

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#32500: consider clang -std=gnu99 in Travis for better C99 portability
-------------------------------------------------+-------------------------
 Reporter:  catalyst                             |          Owner:  teor
     Type:  enhancement                          |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.4.3.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  portability, tor-ci, 029-backport,   |  Actual Points:  0.2
  035-backport, 040-backport, 041-backport,      |
  042-backport                                   |
Parent ID:                                       |         Points:  0.1
 Reviewer:  catalyst                             |        Sponsor:
                                                 |  Sponsor31-can
-------------------------------------------------+-------------------------
Changes (by teor):

 * status:  assigned => needs_review
 * reviewer:   => catalyst
 * actualpoints:   => 0.2


Comment:

 It looks like 0.2.9 works.

 See my PRs:
 * 0.2.9: https://github.com/torproject/tor/pull/1539
 * 0.3.5: https://github.com/torproject/tor/pull/1540
 * 0.4.2: https://github.com/torproject/tor/pull/1541

 I also tested that it does fail without #32495:
 https://travis-ci.org/teor2345/tor/builds/612156095
 (It only fails on clang.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32500#comment:2>
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