[MacPorts] #60182: port to install clang 8.1.0?

[MacPorts]

#60182: port to install clang 8.1.0?
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  Reporter:  simon-dedeo  |      Owner:  (none)
      Type:  request      |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:               |
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Comment (by kencu):

 If possible, you may want to try letting us have a go with the software
 build. It is possible we might get you sorted out.

 Ryan did a nice explanation. My back of the envelope figuring uses
 something like this:
 {{{
 xcode 300s is about equal to open source llvm/clang 3.3
 xcode 400s is about equal to opwn source llvm/clang 3.4
 ...
 xcode 800s is about equal to open source llvm/clang 3.8
 xcode 900s is about equal to open soutce llvm/clang 3.9
 }}}
 and that broke down with xcode in the 1000s, which is about equal to xcode
 6.0

 Apple's forks of llvm/clang are available in Apple's github repo. Last I
 checked, there about 10,000 commits different added. Apple rebases on top
 of the llvm trunk regularly...what an effort to maintain!

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Ticket URL: <https://trac.macports.org/ticket/60182#comment:6>
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