[MacPorts] #69745: pulseaudio @17.0 -x11: build fails on m4 tool

[MacPorts]

#69745: pulseaudio @17.0 -x11: build fails on m4 tool
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  Reporter:  DrLex0      |      Owner:  ryandesign
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.9.3
Resolution:  fixed       |   Keywords:  sonoma
      Port:  pulseaudio  |
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Comment (by RJVB):

 Any idea why this only gets exposed with the `x11` variant unset?

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Ticket URL: <https://trac.macports.org/ticket/69745#comment:4>
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