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[junyer <junyer@xxxxxxxxx>]

Note that the third case worked because the use of `-Wl,--whole-archive
-lpthread -Wl,--no-whole-archive' is a workaround that evidently results
in the TLS (Thread-Local Storage) being initialised properly.

The root cause of this bug is currently uncertain, but
https://gcc.gnu.org/ml/gcc-help/2010-05/msg00029.html could be relevant.

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https://bugs.launchpad.net/bugs/1450355

Title:
  statically linking libpthread is problematic

Status in eglibc package in Ubuntu:
  New

Bug description:
  While investigating https://github.com/google/re2/issues/22, we
  discovered that statically linking libpthread is problematic since
  Ubuntu 14.10. I suspect that the TLS (Thread-Local Storage) is not
  initialised properly, which results in hangs or crashes.

  junyer@whalre:~$ lsb_release -rd
  Description:	Ubuntu 14.10
  Release:	14.10
  junyer@whalre:~$ apt-cache policy libc6-dev
  libc6-dev:
    Installed: 2.19-10ubuntu2.3
    Candidate: 2.19-10ubuntu2.3
    Version table:
   *** 2.19-10ubuntu2.3 0
          500 http://au.archive.ubuntu.com/ubuntu/ utopic-updates/main amd64 Packages
          500 http://security.ubuntu.com/ubuntu/ utopic-security/main amd64 Packages
          100 /var/lib/dpkg/status
       2.19-10ubuntu2 0
          500 http://au.archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages
  junyer@whalre:~$

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