[MacPorts] #61004: py38-sip +universal: fatal error: 'stdio.h' file not found

[MacPorts]

#61004: py38-sip +universal: fatal error: 'stdio.h' file not found
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  Reporter:  ryandesign  |      Owner:  michaelld
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  py-sip      |
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Comment (by kencu):

 base leaves configure.sdkroot empty when it should be "/". Most ports
 therefore test for this and set it to "/" if it's empty.

 if --sdk is empty then sip goes down it's own pathways for finding sdks,
 some of which are different when building universal, and fails.

 Too tired tonight; will build it tomorrow to confirm.

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Ticket URL: <https://trac.macports.org/ticket/61004#comment:6>
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