[MacPorts] #64913: vlang fails for PowerPC: -latomic flag needed, Header file <sys/errno.h>, needed for module `sync` was not found

[MacPorts]

#64913: vlang fails for PowerPC: -latomic flag needed, Header file <sys/errno.h>,
needed for module `sync` was not found
---------------------------+-------------------------------------------
  Reporter:  barracuda156  |      Owner:  harens
      Type:  defect        |     Status:  accepted
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.2
Resolution:                |   Keywords:  powerpc, leopard, snowleopard
      Port:  vlang         |
---------------------------+-------------------------------------------

Comment (by ryandesign):

 You shouldn't create users or groups within phases like the destroot
 phase, since those phases will not run when the user receives a binary.
 `adduser` and `addgroup` are old commands that predate our distribution of
 binaries and shouldn't be used anymore. Their replacement is `add_users`
 which you should use instead (outside of any phase). See #38440 and
 browser:macports-base/doc/portfile.7.

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Ticket URL: <https://trac.macports.org/ticket/64913#comment:36>
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