[MacPorts] #63372: cctools @949.0.1_1: circular dependency with llvm-10 on darwin15

[MacPorts]

#63372: cctools @949.0.1_1: circular dependency with llvm-10 on darwin15
------------------------------+-----------------------
  Reporter:  kencu            |      Owner:  kencu
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:  elcapitan
      Port:  cctools llvm-10  |
------------------------------+-----------------------
Description changed by kencu:

Old description:

> on darwin15, {{{cctools}}} depends on {{{llvm-10}}} but {{{llvm-10}}}
> depends on {{{cctools}}}
>
> {{{
> $ sudo port -v install cctools
> --->  Computing dependencies for cctools...
> The following dependencies will be installed:
>  cctools
>  llvm-10
> Continue? [Y/n]: Y
> Error: The following dependencies were not installed because all of them
> have unmet dependencies (likely due to a dependency cycle): llvm-10
> cctools
> Error: Follow https://guide.macports.org/#project.tickets if you believe
> there is a bug.
> Error: Processing of port cctools failed
> }}}

New description:

 on this system, {{{cctools}}} depends on {{{llvm-10}}} but {{{llvm-10}}}
 depends on {{{cctools}}}

 {{{
 $ sudo port -v install cctools
 --->  Computing dependencies for cctools...
 The following dependencies will be installed:
  cctools
  llvm-10
 Continue? [Y/n]: Y
 Error: The following dependencies were not installed because all of them
 have unmet dependencies (likely due to a dependency cycle): llvm-10
 cctools
 Error: Follow https://guide.macports.org/#project.tickets if you believe
 there is a bug.
 Error: Processing of port cctools failed
 }}}

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Ticket URL: <https://trac.macports.org/ticket/63372#comment:1>
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