[tor-bugs] #27530 [Core Tor/Tor]: Configure: Use AC_TRY_RUN() to check that --enable-gcc-hardening works

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#27530: Configure: Use AC_TRY_RUN() to check that --enable-gcc-hardening works
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     Reporter:  teor          |      Owner:  teor
         Type:  defect        |     Status:  assigned
     Priority:  Medium        |  Milestone:  Tor: 0.3.5.x-final
    Component:  Core Tor/Tor  |    Version:  Tor: unspecified
     Severity:  Normal        |   Keywords:  fast-fix
Actual Points:                |  Parent ID:  #27389
       Points:                |   Reviewer:
      Sponsor:                |
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 Split off [comment:3:ticket:27460 #27460 Comment 3]:

 > maybe in 0.3.5 we should change the implementation of gcc-hardening so
 that it does an AC_TRY_RUN() to see whether it can use these compiler
 flags safely. That could be another ticket, though.

 When we merge to 0.3.5, we should also revert #27460.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27530>
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