[MacPorts] #51524: clang-3.9 @3.9-r270400_0+analyzer+assertions+debug build fails on snowleopard due to missing strnlen function.

[MacPorts]

#51524: clang-3.9 @3.9-r270400_0+analyzer+assertions+debug build fails on
snowleopard due to missing strnlen function.
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 Reporter:  kenneth.f.cunningham@…  |      Owner:  macports-tickets@…
     Type:  defect                  |     Status:  new
 Priority:  Normal                  |  Milestone:
Component:  ports                   |    Version:  2.3.4
 Keywords:  snowleopard             |       Port:  clang-3.9
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 Adding the missing strnlen function in three flagged files fixes it,
 similar to llvm-3.9.

 This is the same issue as #51520.

 I figured out the diffs for this one, and have attached them for anyone
 who wants this to build while we await a more robust solution.

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Ticket URL: <https://trac.macports.org/ticket/51524>
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