[MacPorts] #56429: mapnik @3.0.19_1+gdal+libxml2+postgis+sqlite: Missing proj4 supports

[MacPorts]

#56429: mapnik @3.0.19_1+gdal+libxml2+postgis+sqlite: Missing proj4 supports
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  Reporter:  dmarteau  |      Owner:  macports@…
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.4.3
Resolution:            |   Keywords:
      Port:  mapnik    |
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Comment (by dmarteau):

 It appears the PROJ option is enabled by default in mapnik build
 configuration but the proj library is not able to find it:

 {{{
 ...
 Checking for C library proj... no
 ...
 }}}

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Ticket URL: <https://trac.macports.org/ticket/56429#comment:2>
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