[MacPorts] #61738: libarchive @3.5.0: Undefined symbols for architecture x86_64: :info:build "_strnlen"

[MacPorts]

#61738: libarchive @3.5.0:  Undefined symbols for architecture x86_64: :info:build
"_strnlen"
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 Reporter:  kencu   |      Owner:  tobypeterson
     Type:  defect  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  libarchive
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 libarchive now needs strnlen, at least.

 adding {{{legacysupport 1.0}}} fixes it

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Ticket URL: <https://trac.macports.org/ticket/61738>
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