[MacPorts] #65560: clang-12 @12.0.1_1 +analyzer+debug+libstdcxx+tests: compiling consumes all available system memory; forces restart

[MacPorts]

#65560: clang-12 @12.0.1_1 +analyzer+debug+libstdcxx+tests: compiling consumes all
available system memory; forces restart
--------------------------+--------------------
  Reporter:  cooljeanius  |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.7.2
Resolution:               |   Keywords:
      Port:  clang-12     |
--------------------------+--------------------

Comment (by cooljeanius):

 (as a side note, this bug has me wondering: instead of having just a
 binary `yes`/`no` for `use_parallel_build`, what about allowing Portfiles
 to set a maximum number of build jobs? 16 is probably too many here, but
 turning parallel build off completely here and limiting it to just a
 single job would probably also take too long... maybe just 4 jobs would
 work?)

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Ticket URL: <https://trac.macports.org/ticket/65560#comment:1>
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