[MacPorts] #63500: hdf5 1.12.1_0: build failure due to implicit declaration of function 'clock_gettime'

[MacPorts]

#63500: hdf5 1.12.1_0: build failure due to implicit declaration of function
'clock_gettime'
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  Reporter:  massonseb  |      Owner:  eborisch
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.7.1
Resolution:             |   Keywords:
      Port:  hdf5       |
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Comment (by eborisch):

 I don't have an old Mavericks system around to test (and it builds fine
 with those variants on Catalina), but if you add:

 `PortGroup legacysupport 1.1`

 To the top of the Portfile after the other PortGroups, does it work? (You
 can use `sudo port edit hdf5` to go directly to editing the correct
 Portfile.)

 This is failing for lack of the system clock_gettime() and associated
 CLOCK_MONTONIC, which (according to the man page) was added in Sierra.

-- 
Ticket URL: <https://trac.macports.org/ticket/63500#comment:3>
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