[MacPorts] #33627: pgplot: add gcc46 variant

[MacPorts]

#33627: pgplot: add gcc46 variant
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 Reporter:  russell.jones@…                 |       Owner:  ryandesign@…           
     Type:  enhancement                     |      Status:  assigned               
 Priority:  Normal                          |   Milestone:                         
Component:  ports                           |     Version:  2.0.4                  
 Keywords:  haspatch                        |        Port:  pgplot                 
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Comment(by ryandesign@…):

 You also changed the description of the g95 variant from "build with g95"
 to "build with gfortran from f95". There are two problems with this: 1)
 the port is called g95, not f95; 2) the g95 port provides a program called
 g95, not gfortran (only gcc provides gfortran). So the previous variant
 description was correct, and should not have been changed.

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Ticket URL: <https://trac.macports.org/ticket/33627#comment:2>
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