[MacPorts] #27849: miriad: add gcc45 variant

[MacPorts]

#27849: miriad: add gcc45 variant
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 Reporter:  ryandesign@…             |       Owner:  peter@…        
     Type:  enhancement              |      Status:  new            
 Priority:  Normal                   |   Milestone:                 
Component:  ports                    |     Version:                 
 Keywords:                           |        Port:  miriad         
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Comment(by peter@…):

 Replying to [ticket:27849 ryandesign@…]:
 > Perhaps miriad could get a gcc45 variant?

 The only issue is that GCC 4.5 doesn't accept some code that GCC 4.4 did.
 The first patch updates to a newer MIRIAD codebase which fixes that issue.
 The second patch adds a +gcc45 variant, makes it the default, and removes
 the +gcc43 variant.

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Ticket URL: <https://trac.macports.org/ticket/27849#comment:1>
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