[MacPorts] #19737: happy: uses libffi without declaring dependency

[MacPorts]

#19737: happy: uses libffi without declaring dependency
-------------------------------------+--------------------------------------
 Reporter:  ryandesign@…             |       Owner:  gwright@…           
     Type:  defect                   |      Status:  new                 
 Priority:  Normal                   |   Milestone:                      
Component:  ports                    |     Version:  1.7.1               
 Keywords:                           |        Port:  happy               
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 {{{
 $ port installed happy libffi
 The following ports are currently installed:
   happy @1.18.2_0 (active)
 $ happy
 dyld: Library not loaded: /mp/lib/libffi.5.dylib
   Referenced from: /mp/bin/happy
   Reason: image not found
 Trace/BPT trap
 }}}

 Apparently I had libffi installed at the time that I installed happy, and
 I later uninstalled libffi.

 happy should declare a dependency on libffi if it requires it.
 Alternately, if such a dependency is not desired, happy must not use
 libffi, even if it is installed.

 It's possible this is an extension of #19736 and that once that is
 resolved, this will also resolve itself.

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Ticket URL: <http://trac.macports.org/ticket/19737>
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