[MacPorts] #58784: opencv @3.4.7_0: error: use of undeclared identifier '_mm256_cvtps_ph'

[MacPorts]

#58784: opencv @3.4.7_0: error: use of undeclared identifier '_mm256_cvtps_ph'
------------------------+--------------------
  Reporter:  macdeport  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.5.4
Resolution:             |   Keywords:
      Port:  opencv     |
------------------------+--------------------

Comment (by cjones051073):

 Looks like the compiler blacklist needs some tweaking, to prevent it
 picking

 {{{
 :info:configure -- The CXX compiler identification is AppleClang
 7.0.2.7000181
 :info:configure -- The C compiler identification is AppleClang
 7.0.2.7000181
 :info:configure -- Check for working CXX compiler: /usr/bin/c++
 :info:configure -- Check for working CXX compiler: /usr/bin/c++ -- works
 }}}

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Ticket URL: <https://trac.macports.org/ticket/58784#comment:5>
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