[MacPorts] #69428: mariadb*: fails to build with libxml2 2.12.x

[MacPorts]

#69428: mariadb*: fails to build with libxml2 2.12.x
-------------------------------------------------+-------------------------
  Reporter:  amstilp                             |      Owner:  michaelld
      Type:  defect                              |     Status:  assigned
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:
      Port:  mariadb mariadb-10.0 mariadb-10.1   |
  mariadb-10.2 mariadb-10.3 mariadb-10.4         |
  mariadb-10.5 mariadb-10.6 mariadb-10.7         |
  mariadb-10.8 mariadb-10.9 mariadb-10.10        |
  mariadb-10.11                                  |
-------------------------------------------------+-------------------------

Comment (by Kirkman):

 I am new to MacPorts and trying to understand how to work around this
 issue until it is fixed. (It's preventing me from installing a bunch of
 key things). The ProblemHotlist doesn't mention the libxml2 issue, so
 that's no help.

 *Is* there a way for users to work around it? Is there a way to install an
 older version, maybe?

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Ticket URL: <https://trac.macports.org/ticket/69428#comment:12>
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