[MacPorts] #53784: Add support for tapi-tbd-v2

[MacPorts]

#53784: Add support for tapi-tbd-v2
--------------------------+----------------------
  Reporter:  jtalle       |      Owner:  jeremyhu
      Type:  defect       |     Status:  reopened
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  ld64-latest  |
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Comment (by kencu):

 With `libtapi` and two small modifications to our current `ld64-latest`
 port (deleting the patchfile that disabled `tapi` and adding `-ltapi` to
 the `ld` Makefile line), the current `ld64-latest` port seems to handle
 the `*.tbd` files in the `MacOS10.14.sdk` without any trouble, on 10.13 so
 far.

 So that is a step in the right direction. I will ponder what to do next
 here, but I think perhaps spinning off `ld64-latest` into `ld64-274` might
 make sense, as it would be the last `ld64` we have that does not require
 `tapi`, and then we can make a new `ld64-latest` that hopefully is up to
 date with the latest version available.

 This is a bit tricky, but there are several internet projects out there
 that have made some headway on this already to use as a guide for patches,
 and perhaps once we get something worth looking at, Jeremy might have some
 input.

-- 
Ticket URL: <https://trac.macports.org/ticket/53784#comment:18>
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