[MacPorts] #26976: R @2.11.1 - add gcc45 variant

[MacPorts]

#26976: R @2.11.1 - add gcc45 variant
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 Reporter:  jmrosenstock@…                      |       Owner:  macports-tickets@…                   
     Type:  enhancement                         |      Status:  new                                  
 Priority:  Normal                              |   Milestone:                                       
Component:  ports                               |     Version:  1.9.1                                
 Keywords:                                      |        Port:  R                                    
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 Add gcc45 variant to R and make it the default.

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Ticket URL: <https://trac.macports.org/ticket/26976>
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