[MacPorts] #60150: portgroups cargo, cargo-fetch fail to build new port topgrade

[MacPorts]

#60150: portgroups cargo, cargo-fetch fail to build new port topgrade
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  Reporter:  lhaeger   |      Owner:  MarcusCalhoun-Lopez
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.6.2
Resolution:            |   Keywords:
      Port:  topgrade  |
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Comment (by MarcusCalhoun-Lopez):

 Adding
 {{{
 compiler.cpath
 }}}
 seems to allow your port to build.

 See https://trac.macports.org/ticket/59992#comment:20 for an explanation.

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Ticket URL: <https://trac.macports.org/ticket/60150#comment:7>
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