[MacPorts] #57802: muniversal PG could use $prefix/bin/lipo and $prefix/bin/libtool if available

[MacPorts]

#57802: muniversal PG could use $prefix/bin/lipo and $prefix/bin/libtool if
available
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 Reporter:  RJVB    |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:
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 Using macports-clang versions newer than the host's AppleClang (clang from
 Xcode) you can end up with binaries that the host's lipo (and presumably
 libtool) command won't know how to handle. Example: static libraries from
 `-flto=thin` builds with clang-mp-5+ on OS X 10.9 .

 The lipo command from port:cctools has no problems with those files.

 You'd probably want to use the version from port:cctools only when a
 macports clang compiler is used, that should prevent reproducible build
 violations.

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Ticket URL: <https://trac.macports.org/ticket/57802>
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