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Re: [tor-bugs] #25485 [Applications/Tor Browser]: Browser/TorBrowser/Tor/libstdc++.so.6: version `CXXABI_1.3.11' not found (required by /usr/lib/x86_64-linux-gnu/libmirclient.so.9)

#25485: Browser/TorBrowser/Tor/libstdc++.so.6: version `CXXABI_1.3.11' not found
(required by /usr/lib/x86_64-linux-gnu/libmirclient.so.9)
--------------------------------------------+------------------------------
 Reporter:  cypherpunks                     |          Owner:  tbb-team
     Type:  defect                          |         Status:
                                            |  needs_revision
 Priority:  Very High                       |      Milestone:
Component:  Applications/Tor Browser        |        Version:
 Severity:  Normal                          |     Resolution:
 Keywords:  ff60-esr, TorBrowserTeam201807  |  Actual Points:
Parent ID:                                  |         Points:
 Reviewer:                                  |        Sponsor:
--------------------------------------------+------------------------------
Changes (by gk):

 * status:  needs_review => needs_revision


Comment:

 Replying to [comment:15 sukhbir]:
 > For review:
 >
 > https://github.com/azadi/tor-browser-build-1/tree/bug-25485
 >
 > This is tested on Ubuntu 17.04 (`gcc 7`; newer) as well as Ubuntu 16.04
 (`gcc 5.3.1`; older). To initiate the ABI check, we compare the installed
 `gcc` version with the bundled Tor Browser version `6.4.0`. If the
 installed version is more recent, we remove the bundled `libstdc++.so.6`
 from `Browser/TorBrowser/Tor`, which removes it from `LD_LIBRARY_PATH`.

 That makes me nervous. It is not unusual (at least for me) to have
 different compiler versions around on my Linux box and use them. If I
 happen to use a newer version than usual your patch my blow away my
 libstdc++ which Tor Browser ships but switching back to my regular
 compiler suddenly breaks Tor Browser now.

 I think trying to figure out the installed libstdc++ version and comparing
 it to the one we ship and not using the latter if the former is newer
 seems like a more plausible idea to me. However, there might be pitfalls
 we'd like to avoid in this scenario as well.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25485#comment:18>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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