[MacPorts] #58579: mysql8 @8.0.16: XCode 9.0 or newer is required!

[MacPorts]

#58579: mysql8 @8.0.16: XCode 9.0 or newer is required!
-------------------------+-------------------------
  Reporter:  ryandesign  |      Owner:  herbygillot
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:  fixed       |   Keywords:
      Port:  mysql8      |
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Comment (by kencu):

 Upstream seems to rarely understand the nuances between LLVM-clang
 compiler capabilities and Xcode versions.

 After all -- why required a certain Xcode version? clang capability? We
 cover that easily with newer compilers. Certain system feature?
 LegacySupport supplies almost anything we need. Specific MacOSX SDK
 feature -- this might be an issue -- but often we can use a newer SDK, or
 work around it with a bit of minor {{{#ifdef}}}ing.

 There are really only very rare reasons a certain Xcode version might be
 needed -- it's usually some combination of the above, and a Pull Request
 that is accepted, submitted by someone who often doesn't understand the
 actual problem quite like we might, judging by the PRs I've seen accepted.

-- 
Ticket URL: <https://trac.macports.org/ticket/58579#comment:6>
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