[MacPorts] #57539: legacysupport-1.0: Let ports specify what symbols they need

[MacPorts]

#57539: legacysupport-1.0: Let ports specify what symbols they need
----------------------------+--------------------
  Reporter:  ryandesign     |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:
      Port:  legacysupport  |
----------------------------+--------------------

Comment (by cjones051073):

 As Ken says, on OSX10.7 and newer the only symbols the library currently
 provides is clock_gettime, and only for OSX10.11 and older where it is
 missing. On OSX10.12 and newer the PortGroup does nothing.

 So there is never a problem of the library override symbols provided by
 the system.

-- 
Ticket URL: <https://trac.macports.org/ticket/57539#comment:2>
MacPorts <https://www.macports.org/>
Ports system for macOS