[MacPorts] #62440: perl5: invalid SDK path hardcoded on macOS 11

[MacPorts]

#62440: perl5: invalid SDK path hardcoded on macOS 11
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  Reporter:  chrstphrchvz  |      Owner:  mojca
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  perl5         |
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Comment (by kencu):

 Replying to [comment:9 mojca]:

 > Ken, one part that I'm not sure about when reading your answer: are you
 (and Jeremy) saying that:
 > * we should never pass any SDK to `CFLAGS`, `LDFLAGS`, ... (apparently
 the base does exactly that)

 For anything to do with clang or Xcode, we are supposed to set SDKROOT and
 leave the isysroot stuff out of the flags.

 It might be that there are considered to be too many fringe cases to allow
 this, like maybe nasm and such. I don't know if all those fringe compilers
 respect SDKROOT.

 > * or that we should not bake those values into build scripts

 We can all see that we have undergone no end of significant troubles by
 baking an SDK path into various installed scripts, and later the SDK path
 changes.

 But we have talked about this for literally years now, and it seems that
 we can't stop doing it. Or maybe the software can't stop doing it, and we
 can't find a way to stop the software from doing it, not sure which.

-- 
Ticket URL: <https://trac.macports.org/ticket/62440#comment:10>
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