[MacPorts] #67577: gcc12 12.3.0 fails (?) to build with gcc10-bootstrap (only in Rosetta, native PPC is fine)

[MacPorts]

#67577: gcc12 12.3.0 fails (?) to build with gcc10-bootstrap (only in Rosetta,
native PPC is fine)
---------------------------+--------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  gcc12         |
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Comment (by barracuda156):

 Replying to [comment:4 kencu]:
 > it is behaving as though <sys/fcntl.h> is not being included.
 >
 > I think all of the missing definitions are in that one file...
 >
 > why, I am not sure at this moment.

 Thank you!

 Checked just in case, the header is in place in `/usr/include/sys/`, and
 not modified on my end. So still a mystery what goes wrong.

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Ticket URL: <https://trac.macports.org/ticket/67577#comment:5>
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