[MacPorts] #62991: m4 @1.4.19+universal: configure: error: Cannot find a type to use in place of socklen_t

[MacPorts]

#62991: m4 @1.4.19+universal: configure: error: Cannot find a type to use in place
of socklen_t
---------------------------+--------------------------
  Reporter:  FaradayLight  |      Owner:  kencu
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:  fixed         |   Keywords:  arm64 bigsur
      Port:  m4            |
---------------------------+--------------------------

Comment (by kencu):

 I found only the muniversal PG was needed. No other modifications were
 required.

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Ticket URL: <https://trac.macports.org/ticket/62991#comment:45>
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