[MacPorts] #58493: cctools: using clang < 5.0 as default assembler generates assembly errors in some cases

[MacPorts]

#58493: cctools: using clang < 5.0 as default assembler generates assembly errors
in some cases
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  Reporter:  kencu    |      Owner:  jeremyhu
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  cctools  |
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Comment (by cjones051073):

 Replying to [comment:17 kencu]:
 > My worry with your plan is there will be no way to know which assembler
 was used in a given build. If that's true, triaging tickets will be
 difficult.

 Is it that worse to what happens now ? The selected clang version is only
 used *if* the build happens to have it installed.

 Given the fact cctools cannot have an sort of dependency on any mcaports
 clang, what ever version(s) is involved, there is always going to be a
 degree of non-determinism here...

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Ticket URL: <https://trac.macports.org/ticket/58493#comment:19>
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