[MacPorts] #53476: instruction on LibcxxOnOlderSystems fails on snowleopard

[MacPorts]

#53476: instruction on LibcxxOnOlderSystems fails on snowleopard
------------------------------+-------------------
 Reporter:  chrisjogorman     |      Owner:
     Type:  defect            |     Status:  new
 Priority:  Normal            |  Milestone:
Component:  ports             |    Version:  2.4.0
 Keywords:  snowleopard ld64  |       Port:  ld64
------------------------------+-------------------
 [https://trac.macports.org/wiki/LibcxxOnOlderSystems]

 Instruction 9 states to run

 {{{
 sudo port -v upgrade --enforce-variants ld64 -ld64_97 -ld64_127 -ld64_236
 }}}

 The code fails with

 {{{
 Error: ld64: Variant llvm39 conflicts with llvm34
 Error: Unable to open port: Error evaluating variants
 }}}

--
Ticket URL: <https://trac.macports.org/ticket/53476>
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