[MacPorts] #54896: bedtools @2.26.0: build error with Xcode 9.0

[MacPorts]

#54896: bedtools @2.26.0: build error with Xcode 9.0
-------------------------+-------------------
  Reporter:  ikizhvatov  |      Owner:
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.4.1
Resolution:              |   Keywords:
      Port:  bedtools    |
-------------------------+-------------------

Comment (by raimue):

 * Upstream: https://github.com/arq5x/bedtools2/issues/487
   * Upstream: https://github.com/arq5x/bedtools2/issues/573
   * Homebrew: https://github.com/Homebrew/homebrew-science/issues/6334

 As stated in the upstream report, current upstream master works, so
 patches need to be backported to the release version.

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Ticket URL: <https://trac.macports.org/ticket/54896#comment:1>
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