[MacPorts] #60893: gcc5 unusable on Catalina: ld: unsupported tapi file type '!tapi-tbd' in YAML file

[MacPorts]

#60893: gcc5 unusable on Catalina: ld: unsupported tapi file type '!tapi-tbd' in
YAML file
---------------------------+--------------------------------
  Reporter:  chrstphrchvz  |      Owner:  macports-tickets@…
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.6.3
Resolution:                |   Keywords:
      Port:  gcc5          |
---------------------------+--------------------------------

Comment (by chrstphrchvz):

 All I currently know is that I originally had `ld64 @3_3` (no variants)
 and `ld64-latest @450.3_0+llvm90`; then, after finding
 ticket:58333#comment:8, I installed `ld64 @3_3 +ld64_xcode` which also
 installed `ld64-xcode @2_3`, and had not observed the `ld: unsupported
 tapi file type '!tapi-tbd'` error since doing so.

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Ticket URL: <https://trac.macports.org/ticket/60893#comment:7>
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