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[Bug 1473599] Re: gdb complains about missing Python module libstdcxx.v6.printers

 

In case it's ever needed, for the future, the relevant lines that should
be commented are:

    if not os.path.basename(os.path.dirname(__file__)).startswith('lib'):
        backdirs += 1 # multiarch subdir

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https://bugs.launchpad.net/bugs/1473599

Title:
  gdb complains about missing Python module libstdcxx.v6.printers

Status in gcc-4.8 package in Ubuntu:
  Confirmed

Bug description:
  This appears to be a regression of Debian Bug 726094
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=726094

  Invoking GDB on any C++ program generates the message:

  Traceback (most recent call last):
    File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module>
      from libstdcxx.v6.printers import register_libstdcxx_printers
  ImportError: No module named 'libstdcxx'

  My system info:
  $ lsb_release -rd
  Description:    Ubuntu 14.04.2 LTS
  Release:        14.04
  $ apt-cache policy libstdc++6-4.8-dbg
  libstdc++6-4.8-dbg:
    Installed: 4.8.4-2ubuntu1~14.04
    Candidate: 4.8.4-2ubuntu1~14.04
    Version table:
   *** 4.8.4-2ubuntu1~14.04 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       4.8.2-19ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

  Expected to happen:
    No Python tracebacks in GDB
  What happened instead:
    ImportError: No module named 'libstdcxx'

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: libstdc++6-4.8-dbg 4.8.4-2ubuntu1~14.04
  ProcVersionSignature: Ubuntu 3.13.0-57.95-generic 3.13.11-ckt21
  Uname: Linux 3.13.0-57-generic x86_64
  NonfreeKernelModules: nvidia zfs zunicode zavl zcommon znvpair
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  Date: Fri Jul 10 18:03:53 2015
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: gcc-4.8
  UpgradeStatus: Upgraded to trusty on 2014-04-28 (438 days ago)

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References