[MacPorts] #53931: clang's ld doesn't recognise "-lto_library" flag on 10.6

[MacPorts]

#53931: clang's ld doesn't recognise "-lto_library" flag on 10.6
-------------------------------------------------+-------------------------
  Reporter:  mojca                               |      Owner:  jeremyhu
      Type:  defect                              |     Status:  closed
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:  fixed                               |   Keywords:  snowleopard
      Port:  clang-3.9 clang-4.0 llvm-3.9        |
  llvm-4.0                                       |
-------------------------------------------------+-------------------------

Comment (by kencu):

 Jeremy - the revbump might work but I don't think so - but I was too
 verbose above.

 Short short short answer is ld64-127 (the current 10.6 default ld64)
 doesn't understand the flag `-lto-library`. And clang-3.9.1 uses this by
 default.

--
Ticket URL: <https://trac.macports.org/ticket/53931#comment:23>
MacPorts <https://www.macports.org/>
Ports system for macOS