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dim
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2019-09-19T19:39:34.006715Z
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V 692
Partially undo r351659, which unconditionally removed gets(3) from libc++.

Instead, pull in r371324 from upstream libc++ trunk (by me):

  Remove ::gets for FreeBSD 13 and later

  Summary:

  In https://svnweb.freebsd.org/changeset/base/351659 @emaste removed
  gets() from FreeBSD 13's libc, and our copies of libc++ and
  libstdc++.  In that change, the declarations were simply deleted, but
  I would like to propose this conditional test instead.

  Reviewers: EricWF, mclow.lists, emaste

  Reviewed By: mclow.lists

  Subscribers: krytarowski, christof, ldionne, emaste, libcxx-commits

  Differential Revision: https://reviews.llvm.org/D67316

This makes these changes more MFCable.

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