[tor-bugs] #29013 [Applications/Tor Browser]: Provide stack smashing protection for mingw-clang builds

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#29013: Provide stack smashing protection for mingw-clang builds
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     Reporter:  gk                   |      Owner:  tbb-team
         Type:  enhancement          |     Status:  new
     Priority:  Medium               |  Milestone:
    Component:  Applications/Tor     |    Version:
  Browser                            |   Keywords:  tbb-rbm,
     Severity:  Normal               |  TorBrowserTeam201901,
                                     |  GeorgKoppen201901
Actual Points:                       |  Parent ID:  #28238
       Points:                       |   Reviewer:
      Sponsor:                       |
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 Currently with our mingw-w64/gcc builds we provide among other things
 stack smashing protection (SSP). We want to do the same for
 mingw-w64/clang builds.

 https://bugzilla.mozilla.org/show_bug.cgi?id=1511073 is the upstream bug.
 https://bugzilla.mozilla.org/show_bug.cgi?id=1503589#c19 has a good
 summary to get us started (pointing e.g. to https://github.com/mstorsjo
 /llvm-mingw/blob/master/build-libssp.sh)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29013>
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