[MacPorts] #59515: [icu] : support building with llvm-ar

[MacPorts]

#59515: [icu] : support building with llvm-ar
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 Reporter:  RJVB         |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:  haspatch     |       Port:  icu
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 I usually configure builds to generate static libraries using llvm-ar
 instead of (GNU) ar, because this is more or less required when using LTO.

 Attached is a modified patch for mh-darwin that drops an argument from
 ARFLAGS that is not supported by llvm-ar.

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Ticket URL: <https://trac.macports.org/ticket/59515>
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