[tor-bugs] #31646 [Applications/Tor Browser]: Update abicheck to require newer libstdc++.so.6

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#31646: Update abicheck to require newer libstdc++.so.6
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 Reporter:  boklm                                |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-rbm, TorBrowserTeam201909,       |  Actual Points:
  tbb-9.0-must-alpha, ff68-esr                   |
Parent ID:                                       |         Points:  3
 Reviewer:                                       |        Sponsor:
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Comment (by boklm):

 Replying to [comment:8 cypherpunks]:
 > Why does this DLL/DSO Hell happen regularly? On sane systems, the app's
 components always use the bundled version, and the system's components
 always use the system version. So, what the heck is here?

 See #25485 for why we can't use the bundled `libstdc++` in all cases.

 > And why these tickets are not synced to bumping GCC?

 This should be done when bumping gcc, but was forgotten.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31646#comment:10>
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