[MacPorts] #59234: mysql57 fails to build on macOS 10.15 Catalina

[MacPorts]

#59234: mysql57 fails to build on macOS 10.15 Catalina
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  Reporter:  moyang   |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.6.1
Resolution:           |   Keywords:
      Port:  mysql57  |
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Comment (by Schamschula):

 I got a clean build of {{{mysql57}}} and {{{mysql57-server}}} 5.7.28 with
 Xcode 11.2.

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Ticket URL: <https://trac.macports.org/ticket/59234#comment:2>
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