[MacPorts] #66927: Boost: backport fix for context from boost181 or upgrade default one to boost181?

[MacPorts]

#66927: Boost: backport fix for context from boost181 or upgrade default one to
boost181?
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 Reporter:  barracuda156                   |      Owner:  (none)
     Type:  defect                         |     Status:  new
 Priority:  Normal                         |  Milestone:
Component:  ports                          |    Version:  2.8.1
 Keywords:  powerpc, leopard, snowleopard  |       Port:  boost
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 Boost `context` has been somewhat better fixed in:
 https://github.com/macports/macports-ports/pull/17086
 It remains broken in earlier versions.

 This makes it impossible to build some ports for `ppc` (ex., `folly`).

 Either we need a backport of the fix or otherwise move all systems to
 using new Boost. (Of course, these two options are not mutually exclusive,
 both can be done.)

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Ticket URL: <https://trac.macports.org/ticket/66927>
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