[MacPorts] #71917: git fails to honor MacPorts cppflags: error: implicit declaration of function 'getline'

[MacPorts]

#71917: git fails to honor MacPorts cppflags: error: implicit declaration of
function 'getline'
-----------------------------+--------------------
  Reporter:  barracuda156    |      Owner:  (none)
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.10.5
Resolution:                  |   Keywords:
      Port:  git, git-devel  |
-----------------------------+--------------------

Comment (by ryandesign):

 git's Makefile appears to support the CPPFLAGS variable so it might be
 better to use that.

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Ticket URL: <https://trac.macports.org/ticket/71917#comment:4>
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