[MacPorts] #63564: llvm-12: circular dependency

[MacPorts]

#63564: llvm-12: circular dependency
------------------------+----------------------
 Reporter:  ryandesign  |      Owner:  kencu
     Type:  defect      |     Status:  assigned
 Priority:  High        |  Milestone:
Component:  ports       |    Version:  2.7.1
 Keywords:              |       Port:  llvm-12
------------------------+----------------------
 llvm-12 cannot be installed.

 https://build.macports.org/builders/ports-10.11_x86_64-builder/builds/152422
 {{{
 --->  Dependencies to be installed: cctools llvm-10
 Error: The following dependencies were not installed because all of them
 have unmet dependencies (likely due to a dependency cycle): cctools
 llvm-10
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/63564>
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