[MacPorts] #49924: attica : move Qt4/KDE4 headers and add Qt5 subport

[MacPorts]

#49924: attica : move Qt4/KDE4 headers and add Qt5 subport
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 Reporter:  rjvbertin@…  |      Owner:  macports-tickets@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:  haspatch     |       Port:  attica
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 This supersedes and replaces ticket #49109 , and depends on ticket #49595

 - attica (for Qt4/KDE4) installs its headers into
 ${prefix}/include/attica, where they can be picked up instead of those
 from the KF5 version (port submission pending). Rather than fixing the the
 build system in an unknown number of dependent ports, it is more
 convenient to move the headers of the KDE4 version into the KDE4-specific
 headerfile prefix which is required anyway (see ticket #49595).
 (Note that revbumps shouldn't be required for this kind of change.)

 - adds a Qt5 subport. I'm not convinced this one is very useful once
 kf5-attica is available; it should probably be marked as replaced_by that
 one, in due time. See https://trac.macports.org/ticket/49109 for the
 Qt5-specific patchfiles.

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Ticket URL: <https://trac.macports.org/ticket/49924>
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