[MacPorts] #34818: How to specify library version in depends_lib

[MacPorts]

#34818: How to specify library version in depends_lib
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  Reporter:  david@…               |       Owner:  macports-tickets@…                   
      Type:  defect                |      Status:  closed                               
  Priority:  Normal                |   Milestone:                                       
 Component:  ports                 |     Version:  2.1.1                                
Resolution:  invalid               |    Keywords:                                       
      Port:  kdenlive              |  
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Comment(by ryandesign@…):

 The [browser:trunk/dports/x11/pango/Portfile?rev=93974#L55 pango port's
 pre-configure block] gives some examples of how a port could check its
 dependencies manually. Usually this is not necessary because MacPorts
 upgrades dependencies first. Pango does it because there are also
 development version ports (glib2-devel, cairo-devel, pango-devel) and from
 time to time the development versions and stable versions have not been
 compatible with one another.

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Ticket URL: <https://trac.macports.org/ticket/34818#comment:4>
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