[MacPorts] #55471: Use separate portindexes for libc++ on older systems

[MacPorts]

#55471: Use separate portindexes for libc++ on older systems
--------------------------+----------------------------
  Reporter:  ryandesign   |      Owner:  neverpanic
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:  MacPorts 2.6.0
 Component:  base         |    Version:
Resolution:               |   Keywords:
      Port:               |
--------------------------+----------------------------
Changes (by neverpanic):

 * milestone:  MacPorts 2.5.0 => MacPorts 2.6.0


Comment:

 Replying to [comment:24 neverpanic]:
 > We want to get https://github.com/macports/macports-base/pull/63 into
 2.5.0. Once this is done, the ticket can be moved to the 2.6.0 milestone.

 Now that PR 83 (which replaces PR 63) has been merged, let's move the
 ticket to 2.6.0 as discussed.

-- 
Ticket URL: <https://trac.macports.org/ticket/55471#comment:34>
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