[MacPorts] #62183: ruby30 @3.0.0: error: use of undeclared identifier 'fmt'; did you mean 'fma'?

[MacPorts]

#62183: ruby30 @3.0.0: error: use of undeclared identifier 'fmt'; did you mean
'fma'?
--------------------------+----------------------
  Reporter:  simon-dedeo  |      Owner:  kimuraw
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.4
Resolution:               |   Keywords:  sierra
      Port:  ruby30       |
--------------------------+----------------------

Comment (by mascguy):

 My apologies for the delayed permanent fix for this, it's ridiculously
 trivial: We simply need to blacklist Xcode Clang versions prior to 901.

 Fix verified locally, and a commit to follow momentarily.

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Ticket URL: <https://trac.macports.org/ticket/62183#comment:9>
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