[MacPorts] #63085: clang-12: compiler-rt build sometimes fails parallel building

[MacPorts]

#63085: clang-12: compiler-rt build sometimes fails parallel building
-----------------------+--------------------
  Reporter:  blair     |      Owner:  kencu
      Type:  defect    |     Status:  closed
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:  fixed     |   Keywords:
      Port:  clang-12  |
-----------------------+--------------------

Comment (by kencu):

 sure, I'd be happy to help you with that. First, let's see if there is a
 problem.

 The buildbot is only useful if you are using MacPorts' defaults, so that
 means your prefix is {{{/opt/local}}} and you have not made any
 modifications to variants.conf or macports.conf.

 Then uninstall all copies of {{{clang-12}}} that you have installed:
 {{{
 sudo port -f uninstall clang-12
 }}}
 if a list of installed clang-12 versions comes up, select all. When you
 are finished, this should show nothing installed:
 {{{
 port -v installed | grep clang-12
 }}}
 Then, force an installation of clang-12 from the buildbot. Don't force any
 variants, or you might not match the defaults:
 {{{
 sudo port -v -b install clang-12
 }}}

 and then, if you do not download and install a pre-built clang-12, please
 show us the error.

-- 
Ticket URL: <https://trac.macports.org/ticket/63085#comment:20>
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