[MacPorts] #38218: default configure.optflags should be -Os rather than -O2

[MacPorts]

#38218: default configure.optflags should be -Os rather than -O2
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  Reporter:  jeremyhu@…   |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:  MacPorts Future
 Component:  base         |    Version:  2.1.3
Resolution:               |   Keywords:
      Port:               |
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Comment (by jeremyhu@…):

 And FWIW, the difference from -O2 to -Os is really a small set of safe
 optimizations.

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Ticket URL: <https://trac.macports.org/ticket/38218#comment:4>
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