[tor-bugs] #20858 [Applications/Tor Browser Sandbox]: Make webgl work with forced software rendering.

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#20858: Make webgl work with forced software rendering.
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 Reporter:  yawning                           |          Owner:  yawning
     Type:  defect                            |         Status:  closed
 Priority:  Medium                            |      Milestone:
Component:  Applications/Tor Browser Sandbox  |        Version:
 Severity:  Normal                            |     Resolution:  fixed
 Keywords:                                    |  Actual Points:
Parent ID:                                    |         Points:
 Reviewer:                                    |        Sponsor:
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Comment (by yawning):

 Because it was bothering me, I looked into the Arch Linux situation a bit
 more.  libGL is failing to load `swrast_dri.so` because the
 `libstdc++.so.6` shipped with Tor Browser is too old to satisfy
 `libLLVM-3.9.so`'s dependency on my system.

 {{{
 write(2, "dlopen /usr/lib/xorg/modules/dri/swrast_dri.so failed (tor-
 browser_en-US/Browser/TorBrowser/Tor/libstdc++.so.6: version
 `GLIBCXX_3.4.22' not found (required by /usr/lib/libLLVM-3.9.so))\n", 201)
 = 201
 }}}

 Hardware rendering works fine, because the various hardware rendering DRI
 modules don't link against `libLLVM`.  Nothing I can really do about this,
 at this point this is a Tor Browser bug more than anything else.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20858#comment:4>
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