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

[MacPorts]

#38218: default optflags should be -Os rather than -O2
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 Reporter:  jeremyhu@…  |      Owner:  macports-tickets@…
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  base        |    Version:  2.1.3
 Keywords:              |       Port:
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 All the kids are doing it.  -Os will result in smaller text allowing for
 more optimal use of spacial locality in the text cache.  As an added
 benefit, ppc will benefit in areas where -O2 results in text segments that
 are too large for reloc (#37839)

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