[MacPorts] #69202: Provide config.log from builders

[MacPorts]

#69202: Provide config.log from builders
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  Reporter:  Dave-Allured   |      Owner:  admin@…
      Type:  enhancement    |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:                 |   Keywords:
      Port:                 |
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Comment (by jmroot):

 For reference, the code that base uses to find all the config.log and
 equivalents for the purpose of looking for implicit declaration errors:
 https://github.com/macports/macports-
 base/blob/v2.9.0/src/port1.0/portconfigure.tcl#L1881-L1882

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Ticket URL: <https://trac.macports.org/ticket/69202#comment:5>
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