[MacPorts] #59321: qt56-qtscript @5.6.3_2: : error: unknown type name 'This'

[MacPorts]

#59321: qt56-qtscript @5.6.3_2: : error: unknown type name 'This'
--------------------+---------------------------------
 Reporter:  kencu   |      Owner:  MarcusCalhoun-Lopez
     Type:  defect  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  qt56-qtscript
--------------------+---------------------------------
 This port defaults to clang-9.0 for building on 10.7, but this is a
 failure, in the end (log attached). The first error is as above, but a
 litany of errors follow.

 The build succeeds with clang-3.7, but not clang-5.0.

 {{{
 qt56-qtscript @5.6.3_2 (active) platform='darwin 11' archs='x86_64'
 date='2019-10-13T13:06:49-0700'
 }}}

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Ticket URL: <https://trac.macports.org/ticket/59321>
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