[MacPorts] #64253: llvm-3.3 and llvm-3.4 fail for ppc+ppc64

[MacPorts]

#64253: llvm-3.3 and llvm-3.4 fail for ppc+ppc64
-------------------------------+-------------------------------------------
  Reporter:  barracuda156      |      Owner:  (none)
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.7.1
Resolution:                    |   Keywords:  PowerPC, Leopard, ppc64, LLVM
      Port:  llvm-3.3,         |
  llvm-3.4                     |
-------------------------------+-------------------------------------------

Comment (by ryandesign):

 Looks like `ar` is used to create libLLVMCodeGen.a and then `ranlib` is
 asked to operate on that static library and complains about how it was
 made. I have often seen the recommendation that static libraries should be
 created using `libtool`, not `ar`. I don't know if that would solve this
 particular issue. If you can figure out how to tell llvm to use `libtool`
 instead of `ar` you could try that.

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Ticket URL: <https://trac.macports.org/ticket/64253#comment:3>
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