[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
----------------------+----------------------
  Reporter:  kencu    |      Owner:  jeremyhu
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  cctools  |
----------------------+----------------------

Comment (by kencu):

 In [changeset:"e29edf4b96db25bb99c40d6092c6a6bf64b5fe2c/macports-ports"
 e29edf4b96db25bb99c40d6092c6a6bf64b5fe2c/macports-ports] (master):
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="e29edf4b96db25bb99c40d6092c6a6bf64b5fe2c"
 libgcc9/gcc9, libgcc-devel, gcc10: harmonize blacklisting

 these ports are very similar wrt blacklisting
 they don't build properly with macports-clang < 3.8
 they don't build at all with clang-9.0 at present

 see: https://trac.macports.org/ticket/59253
 see: https://trac.macports.org/ticket/58493
 }}}

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Ticket URL: <https://trac.macports.org/ticket/58493#comment:36>
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