[MacPorts] #40656: Use -isystem instead of -I in default configure.cppflags

[MacPorts]

#40656: Use -isystem instead of -I in default configure.cppflags
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  Reporter:  ryandesign   |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  reopened
  Priority:  Normal       |  Milestone:  MacPorts Future
 Component:  base         |    Version:  2.2.0
Resolution:               |   Keywords:  haspatch
      Port:               |
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Changes (by kencu):

 * cc: jmroot (added)


Comment:

 Josh adding you for comment.

 Do you think the entire tree of MacPorts headers should all be declared as
 "system" headers?

 IIRC, that would change them all to being included last rather than first,
 which could be interesting given 25,000 ports that haven't been built that
 way...

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Ticket URL: <https://trac.macports.org/ticket/40656#comment:21>
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