[MacPorts] #33649: cgal update 3.9 -> 4.0

[MacPorts]

#33649: cgal update 3.9 -> 4.0
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 Reporter:  mmoll@…             |       Owner:  vince@…           
     Type:  update              |      Status:  new               
 Priority:  Normal              |   Milestone:                    
Component:  ports               |     Version:  2.0.4             
 Keywords:                      |        Port:  cgal              
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Comment(by sean.michael.farley@…):

 Sorry about high highjacking this thread; I was about to create a new
 ticket that updated cgal to 4.0 as well. I see that you added a dependency
 on eigen3 but from the cgal manual, eigen is only recommended over taucs,
 which wasn't a dependency before, so maybe eigen3 could be a variant?

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Ticket URL: <https://trac.macports.org/ticket/33649#comment:1>
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