[MacPorts] #16574: Portfiles need to be able to declare a dependency on a base version

[MacPorts]

#16574: Portfiles need to be able to declare a dependency on a base version
--------------------------------------+-------------------------------------
  Reporter:  macosforge.org at beej.org  |       Owner:  macports-tickets at lists.macosforge.org
      Type:  enhancement              |      Status:  new                                  
  Priority:  Normal                   |   Milestone:  MacPorts base enhancements           
 Component:  base                     |     Version:  1.6.0                                
Resolution:                           |    Keywords:                                       
      Port:                           |  
--------------------------------------+-------------------------------------

Comment(by afb at macports.org):

 There is {{{PortSystem}}}, for introducing breaking changes to the
 Portfile syntax...

-- 
Ticket URL: <http://trac.macports.org/ticket/16574#comment:3>
MacPorts <http://www.macports.org/>
Ports system for Mac OS