[MacPorts] #69578: abseil @ 20240116.1: Update cxx_standard to 2017

[MacPorts]

#69578: abseil @ 20240116.1: Update cxx_standard to 2017
---------------------------+--------------------
  Reporter:  FlyingSamson  |      Owner:  judaew
      Type:  enhancement   |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.9.1
Resolution:  fixed         |   Keywords:
      Port:  abseil        |
---------------------------+--------------------

Comment (by FlyingSamson):

 Thanks for updating the port.

 Unfortunately, the change only restricts the used compiler, but does not
 actually cause the code to be build with c++17 standard enabled.
 This would require to additionally switch the line
 `-DCMAKE_CXX_STANDARD=14` to `-DCMAKE_CXX_STANDARD=17` (line 71 in the
 updated portfile).

-- 
Ticket URL: <https://trac.macports.org/ticket/69578#comment:5>
MacPorts <https://www.macports.org/>
Ports system for macOS