[MacPorts] #47410: gcc49 @4.9.2_1: bootstrap comparison fails with Xcode 6.3

[MacPorts]

#47410: gcc49 @4.9.2_1: bootstrap comparison fails with Xcode 6.3
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  Reporter:  howarth.at.macports@…  |      Owner:  mww@…
      Type:  defect                 |     Status:  new
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:  2.3.3
Resolution:                         |   Keywords:
      Port:  gcc49, libgcc          |
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Comment (by howarth.at.macports@…):

 Replying to [comment:9 sears3@…]:
 > So basically no gcc version can be compiled until it's handled upstream?
 Effectively, new installs of macports are not happening for a while then
 (as I just figured out). Anybody have a hack/workaround?

 No. You just have to explicitly pass '--with-build-config=bootstrap-debug'
 to configure when building with the clang 3.5 or later from llvm.org or
 with Apple clang 6.1. The code in configure that tests for proper debug
 code in object files is tripped up by this breakage in clang (where the
 wrong CIE version of dwarf 3 is emitted in the absence of debug flags).

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Ticket URL: <https://trac.macports.org/ticket/47410#comment:12>
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