[MacPorts] #69600: libdeflate @1.20: fails on 10.7, 10.8, 10.9, 10.10

[MacPorts]

#69600: libdeflate @1.20: fails on 10.7, 10.8, 10.9, 10.10
---------------------------+-------------------------
  Reporter:  Dave-Allured  |      Owner:  herbygillot
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  libdeflate    |
---------------------------+-------------------------
Changes (by ryandesign):

 * cc: @… (removed)
 * cc: dankamongmen (added)
 * owner:  @… => herbygillot


Comment:

 If the compiler is llvm.org clang, then `CLANG_PREREQ(3, 9, 8000000)`
 checks if the version of clang is 3.9 or later, and if the compiler is
 Apple clang, then it checks if the version of clang is 8000000 (a.k.a 800
 a.k.a 8.0.0) or later. So it's doing what it's programmed to do. Since
 it's not mentioned in the commit message, you could ask them to clarify if
 Apple clang 8000000 was indeed the intended version number. If so, we
 should blacklist `{clang < 800}`.

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Ticket URL: <https://trac.macports.org/ticket/69600#comment:1>
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