[MacPorts] #53562: opencv @3.2.0: fatal error: 'AVFoundation/AVFoundation.h' file not found

[MacPorts]

#53562: opencv @3.2.0: fatal error: 'AVFoundation/AVFoundation.h' file not found
---------------------+----------------------
  Reporter:  fmw42   |      Owner:  stromnov
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.4.0
Resolution:          |   Keywords:
      Port:  opencv  |
---------------------+----------------------

Comment (by fmw42):

 I tried upgrading all my outdated ports, but am still having trouble now
 with both opencv and libopenraw.

 The latter seems to be an issue with the c++ compiler.

 1) Shall I report this separately
 2) What is my best option here for either or both issues?  The
 instructions are quite complex other than upgrading my Mac OSX. Is that my
 best option?  It seems like MacPorts is no longer using a compatible
 compiler for my SnowLeopard.

 I am attaching my session log.

 Thanks again for any help and sorry I am not expert enough to understand
 all the ramifications.

--
Ticket URL: <https://trac.macports.org/ticket/53562#comment:9>
MacPorts <https://www.macports.org/>
Ports system for macOS