[MacPorts] #36438: ports which mirror system libraries can cause +universal ports to fail if they are -universal

[MacPorts]

#36438: ports which mirror system libraries can cause +universal ports to fail if
they are -universal
----------------------------+------------------------
  Reporter:  ahelfer1971@…  |      Owner:  jeremyhu@…
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.1.2
Resolution:                 |   Keywords:
      Port:  ld64           |
----------------------------+------------------------

Comment (by egall@…):

 Actually I just came up with another idea: would throwing something like
 the following into perl5's universal variant work?
 {{{
 if {![catch "registry_active libstdcxx"]} {
     depends_lib-append path:lib/.libstdcxx:libstdcxx
     require_active_variants path:lib/.libstdcxx:libstdcxx universal
 }
 }}}
 This is with including the `active_variants 1.1` port group somewhere
 earlier in the portfile of course. Also I'm adding the dependency on
 libstdcxx because I'm assuming that `require_active_variants` only works
 with ports that are already in a port's dependency list.

-- 
Ticket URL: <https://trac.macports.org/ticket/36438#comment:53>
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