[MacPorts] #27979: ports requiring libusb should allow libusb-devel to satisfy the dependency (was: libdc1394 requires libusb, conflicts with libusb-devel, which is more stable.)

[MacPorts]

#27979: ports requiring libusb should allow libusb-devel to satisfy the dependency
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 Reporter:  njbutko@…          |       Owner:  mail@…                                                                                                                   
     Type:  defect             |      Status:  new                                                                                                                      
 Priority:  Normal             |   Milestone:                                                                                                                           
Component:  ports              |     Version:  1.9.2                                                                                                                    
 Keywords:                     |        Port:  libnfc libdc1394 libfreespace libusb-compat usbmuxd libgpod gpsd py26-pyusb-devel py27-pyusb-devel indi usrp iguanaIR nut
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Changes (by ryandesign@…):

 * cc: al-libnfcport@…, brett@…, ecronin@…, jt.burgess@…, jtomshine@…,
 mail@…, michaelld@…, ricci@…, rmstonecipher@…, ryandesign@…, toby@…,
 tomldavis@… (added)
  * port:  libdc1394 => libnfc libdc1394 libfreespace libusb-compat usbmuxd
           libgpod gpsd py26-pyusb-devel py27-pyusb-devel indi
           usrp iguanaIR nut


Comment:

 The correct solution is not to add variants or add new ports, but to
 declare the dependency in such a way that either libusb or libusb-devel
 could satisfy it. This is how all ports should declare dependencies on all
 ports having -devel versions. That is, the dependency should not be
 "port:libusb" (nor "port:libusb-devel") but instead
 "path:lib/pkgconfig/libusb-1.0.pc:libusb". See #14540 for further
 documentation. Cc'ing maintainers of all ports that depend on libusb.

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Ticket URL: <https://trac.macports.org/ticket/27979#comment:11>
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