[Bug 1521172] Re: [Ubuntu 16.04] Use glibc-2.23 in Ubuntu 16.04

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** Tags removed: architecture-s39064

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Title:
  [Ubuntu 16.04] Use glibc-2.23 in Ubuntu 16.04

Status in glibc package in Ubuntu:
  Triaged

Bug description:
  glibc-2.23 will introduce an important ABI change for Power. It will
  be a prerequisite for __builtin_cpu_is() and __builtin_cpu_supports()
  in gcc.

  
  The __builtin_cpu_is () / __builtin_cpu_supports()  are required to bring Power on-par with Intel regarding CPU and capability identification during runtime, allowing our customers to optimize their code path to the Power processor they are running on.

  These gcc builtins will be disabled when the binary is built against a
  glibc older than 2.23, making glibc-2.23 a requirement for this
  feature to work.

  
  This version of glibc will be released in early February/2016.

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