[MacPorts] #54289: libcxx{,-abi} : upgrade + "runtime" variant

[MacPorts]

#54289: libcxx{,-abi} : upgrade + "runtime" variant
-------------------------------+----------------------
  Reporter:  RJVB              |      Owner:  jeremyhu
      Type:  update            |     Status:  assigned
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:  haspatch
      Port:  libcxxabi libcxx  |
-------------------------------+----------------------

Comment (by potmj):

 Could this affect new users starting out with
 [https://trac.macports.org/wiki/LibcxxOnOlderSystems], Bootstrapping 2:
 part 2. [+universal builds, intel] on Leopard?


 I had been slowly working through this page, getting to about
 Bootstrapping 3: part 6, but in the mean time I have run port selfupdate.
 Now things are outdated and it seems I need to upgrade libcxx.  It is not
 going well, as clang-3.7 is not properly building the ppc part because of
 a problem with libclang_rt.osx.a....   (I could only get clang-3.4 to
 build a ''-universal'' clang-3.7)


 I have wound back the macports.config changes in Bootstrapping 3: etc,
 deactivated clang-3.7, etc, but still failing to upgrade libcxx.
 Do we need to now add some 'configure.compiler' option or something to
 support  port -v upgrade libcxx?

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Ticket URL: <https://trac.macports.org/ticket/54289#comment:5>
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