[MacPorts] #35231: cgal: update to 4.0.2 and fix build with Boost 1.50.0

[MacPorts]

#35231: cgal: update to 4.0.2 and fix build with Boost 1.50.0
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  Reporter:  raphael@…             |       Owner:  vince@…           
      Type:  update                |      Status:  closed            
  Priority:  Normal                |   Milestone:                    
 Component:  ports                 |     Version:                    
Resolution:  fixed                 |    Keywords:  haspatch          
      Port:  cgal                  |  
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Comment(by philipp.moeller@…):

 No. I would like to see a benchmark that strains interval arithmetic do
 see the actual differences between -frounding-math on gcc and the fix we
 have for clang. This would also be a nice indication if it is worth the
 effort to implement -frounding-math for clang. Feel free to benchmark
 something and show it. I would like to see it.

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Ticket URL: <https://trac.macports.org/ticket/35231#comment:9>
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