[MacPorts] #52131: cctools, ld64: Removing +llvm37 variant pulls in +llvm34 instead and toolchain becomes unstable on 10.6

[MacPorts]

#52131: cctools, ld64: Removing +llvm37 variant pulls in +llvm34 instead and
toolchain becomes unstable on 10.6
-------------------------------------+-------------------------
  Reporter:  kenneth.f.cunningham@…  |      Owner:  jeremyhu@…
      Type:  defect                  |     Status:  assigned
  Priority:  Normal                  |  Milestone:
 Component:  ports                   |    Version:  2.3.4
Resolution:                          |   Keywords:  snowleopard
      Port:  cctools ld64            |
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Comment (by kenneth.f.cunningham@…):

 Hi Jeremy,

 > Can you explain how +llvm34 "brought down the toolchain"?  It should
 still function fine, just with some LTO functionality missing.

 Not really sure how it died...when ld64 upgraded with the +llvm34 variant,
 it started segfaulting on any attempts to link executables. Nothing I saw
 in the crash logs gave me a definite clue as to why. I couldn't properly
 get ld64 to roll back either.

 > Please use +llvm38, +llvm39, or +llvmdev

 Check. Using +llvm38 now, on Snow Leopard, after the math.h fix I filed
 separately. Hopefully the other issue you mentioned with clang/llvm-3.8 on
 snow leopard (I believe it was something to do with i386 code building)
 won't be troublesome.

 Best, Ken

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Ticket URL: <https://trac.macports.org/ticket/52131#comment:4>
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