[MacPorts] #40542: Altas build fails during Octave install

[MacPorts]

#40542: Altas build fails during Octave install
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  Reporter:  andy@…  |      Owner:  vince@…
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.2.0
Resolution:          |   Keywords:
      Port:  atlas   |
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Comment (by vince@…):

 Andy,
 there seems to be a lurking bug with ‘mpclang33’ during Atlas compilation
 on the machine you’re using. Can you give me more informations, e.g. the
 processor of your computer?
 Atlas takes a long time, because it is all about optimization. For each
 elementary matrix operation that builds up the library, Atlas tries a
 bunch of different values (cache size, number of registers used,
 preloading, etc.) and picks up the one that gives the best performance.
 Since sometimes there are more than a thousand possible combinations, it
 takes a moderately long time to test the whole set and pick up the most
 efficient. Multiply this by every operation, knowing that each operation
 can be carried out in four precisions: single (s), double (d), single
 complex (c), double complex (z), each one optimized with its own values.
 Moreover, to avoid thread interference, Atlas carries out its measures
 using a single threaded model, meaning that even with 32,768 cores, for
 example, it would not compile faster.
 Now, I will try to dig further to see what’s happening.

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Ticket URL: <https://trac.macports.org/ticket/40542#comment:6>
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