[tor-bugs] #18339 [Tor]: Tor master is broken with mingw-w64

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#18339: Tor master is broken with mingw-w64
------------------------+--------------------------------
     Reporter:  gk      |      Owner:
         Type:  defect  |     Status:  new
     Priority:  Medium  |  Milestone:  Tor: 0.2.8.x-final
    Component:  Tor     |    Version:
     Severity:  Normal  |   Keywords:
Actual Points:          |  Parent ID:
       Points:          |    Sponsor:
------------------------+--------------------------------
 It seems tor master is broken if one is using mingw-w64 for cross-
 compilation:

 https://jenkins.torproject.org/job/tor-ci-mingwcross/791/.

 We've hit that with our nightly build setup, too:
 {{{
 ../src/common/util.c: In function 'check_private_dir':
 ../src/common/util.c:2085:45: error: 'O_NOFOLLOW' undeclared (first use in
 this function)
    fd = open(sandbox_intern_string(dirname), O_NOFOLLOW);
                                              ^
 ../src/common/util.c:2085:45: note: each undeclared identifier is reported
 only once for each function it appears in
   CC     src/ext/csiphash.o
   CC     src/common/compat_winthreads.o
   CC     src/common/aes.o
   CC     src/common/crypto.o
 make[1]: *** [src/common/util.o] Error 1
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18339>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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