[MacPorts] #55337: mbuffer @20171011 new Portfile contribution

[MacPorts]

#55337: mbuffer @20171011 new Portfile contribution
-------------------------+-----------------
  Reporter:  hcardwell   |      Owner:
      Type:  submission  |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  mbuffer     |
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Comment (by kencu):

 I tried a build on highsierra as well. It built through to completion, but
 with this kinda ominous-sounding warning, considering what this software
 is meant to do:
 {{{
 mbuffer.c:70:2: warning: sendfile is unable to send from buffers
 [-W#warnings]
 #warning sendfile is unable to send from buffers
 }}}

 when I tried to run it, here's what happened:
 {{{
 $ mbuffer
 mbuffer: fatal: Error creating semaphore Buf2Dev: Function not implemented
 }}}

 I'll post up the entire build log for you to ponder.

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Ticket URL: <https://trac.macports.org/ticket/55337#comment:4>
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