[MacPorts] #13814: fftw-3: Not building universal variant

[MacPorts]

#13814: fftw-3: Not building universal variant
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  Reporter:  andre.david@…          |       Owner:  takeshi@…           
      Type:  defect                 |      Status:  closed              
  Priority:  Normal                 |   Milestone:  Port Bugs           
 Component:  ports                  |     Version:  1.6.0               
Resolution:  wontfix                |    Keywords:  fftw-3, universal   
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Comment(by 10.50@…):

 fftw-3 cannot be made universal an easy way. When I try to add a universal
 variant and blindly compile it with -arch i386 -arch x86_64, gcc don't
 even go further the first compilation phase because the command line uses
 -M options which are forbidden with multiple archs (the preprocessor
 output differs according to the arch being compiled for).
 There is no other way to build a fftw-3 universal but to create a per arch
 temp directory, compiling each version for one arch, and then use lipo to
 gather the multiple .dylib files into a universal one.
 I wonder if this can be done with a script under MacPorts 1.7.

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Ticket URL: <http://trac.macports.org/ticket/13814#comment:7>
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