[MacPorts] #60419: clang-9.0 and dependents cannot be built on 10.6 because of a dependency cycle (was: bison cannot be built on 10.6 because of a dependency cycle)

[MacPorts]

#60419: clang-9.0 and dependents cannot be built on 10.6 because of a dependency
cycle
---------------------------------------------------+--------------------
  Reporter:  ryandesign                            |      Owner:  (none)
      Type:  defect                                |     Status:  new
  Priority:  Normal                                |  Milestone:
 Component:  ports                                 |    Version:  2.6.2
Resolution:                                        |   Keywords:
      Port:  clang-9.0 cmake curl libpsl python38  |
---------------------------------------------------+--------------------
Changes (by jmroot):

 * cc: jeremyhu, larryv, kencu, michaelld (added)
 * port:  bison => clang-9.0 cmake curl libpsl python38


Comment:

 The cycle is:
 {{{
 clang-9.0 -> cmake -> curl -> libpsl -> python38 -> clang-9.0
 }}}

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Ticket URL: <https://trac.macports.org/ticket/60419#comment:1>
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