[MacPorts] #59822: cmake @3.16.1: error: no matching constructor for initialization of 'const std::vector<ExpectedSpec>'

[MacPorts]

#59822: cmake @3.16.1: error: no matching constructor for initialization of 'const
std::vector<ExpectedSpec>'
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  Reporter:  letaage  |      Owner:  michaelld
      Type:  defect   |     Status:  assigned
  Priority:  High     |  Milestone:
 Component:  ports    |    Version:  2.6.2
Resolution:           |   Keywords:  mountainlion mavericks
      Port:  cmake    |
----------------------+------------------------------------

Comment (by Ionic):

 Aaaand that was wrong again. Apple-clang 6.0 does support `gnu++1y` as a
 parameter to `-std`.

 The issue seems to be tries to explicitly initialize the `std::map`
 structure inside of the `cmCTestResourceSpec` structure and older
 compilers choke on that, while it works with newer ones.

 If you use the universal initializer for that part, it just works with
 older compilers (i.e., `{{{}}}` => `{}`).

 Arguably, that's a more elegant solution anyway, but I don't understand
 why the original specification can't be mapped correctly.

-- 
Ticket URL: <https://trac.macports.org/ticket/59822#comment:14>
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