[MacPorts] #36532: cfitsio: should set library version number

[MacPorts]

#36532: cfitsio: should set library version number
------------------------------+--------------------------------
 Reporter:  Deil.Christoph@…  |      Owner:  macports-tickets@…
     Type:  defect            |     Status:  new
 Priority:  Low               |  Milestone:
Component:  ports             |    Version:  2.1.2
 Keywords:                    |       Port:  cfitsio
------------------------------+--------------------------------
 Currently cfitsio doesn't set a library version number:
 {{{
 $ otool -L /opt/local/lib/libcfitsio.dylib
 /opt/local/lib/libcfitsio.dylib:
         /opt/local/lib/libcfitsio.dylib (compatibility version 0.0.0,
 current version 0.0.0)
         /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
 version 169.3.0)
 }}}

 What has to be changed in the Portfile to properly set the dylib version
 number?

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Ticket URL: <https://trac.macports.org/ticket/36532>
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