[MacPorts] #60674: ispc: Why use an SDK on OS X 10.10 and later?

[MacPorts]

#60674: ispc: Why use an SDK on OS X 10.10 and later?
------------------------+----------------------
 Reporter:  ryandesign  |      Owner:  tenomoto
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.6.2
 Keywords:              |       Port:  ispc
------------------------+----------------------
 Last year [changeset:e0c9fb49a4e4446e4bb88d9e69fa45fc1019ac4a/macports-
 ports  ispc was modified] to use the MacOSX.sdk on Darwin 14 (OS X 10.10)
 and later. Why? Was this possibly a typo—did you intend to do this on
 Darwin 18 (macOS 10.14) and later, since /usr/include is not present on
 macOS 10.14 and later? Or was there a different reason?

 Also, you should verify that `${os.platform} eq "darwin"` before checking
 the value of `${os.major}`.

-- 
Ticket URL: <https://trac.macports.org/ticket/60674>
MacPorts <https://www.macports.org/>
Ports system for macOS