maintainer-feedback requested: [Bug 229759] multimedia/vlc-qt4 fails to build, when qt5 is also installed

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Bugzilla Automation <bugzilla at FreeBSD.org> has asked freebsd-multimedia mailing
list <multimedia at FreeBSD.org> for maintainer-feedback:
Bug 229759: multimedia/vlc-qt4 fails to build, when qt5 is also installed
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229759



--- Description ---
Attempting to build vlc-qt4 kept failing with cpp-errors (this file was
generated with moc-5....) until I modified qt.mk as below to explicitly add MOC
to the environment bypassing the qtchooser:

--- Uses/qt.mk	(revision 474594)
+++ Uses/qt.mk	(working copy)
@@ -118,8 +118,8 @@
 .  endfor

 # Pass the chosen Qt version to the environment for qtchooser.
-CONFIGURE_ENV+=		QT_SELECT=${_QT_RELNAME}
-MAKE_ENV+=		QT_SELECT=${_QT_RELNAME}
+CONFIGURE_ENV+=		QT_SELECT=${_QT_RELNAME} MOC=${MOC:Q}
+MAKE_ENV+=		QT_SELECT=${_QT_RELNAME} MOC=${MOC:Q}

 # Make sure both the installed mkspecs as well as the ones being built are
 # found, with the ones from the port being built having preference.


Other ports using moc (or anything else backed by qtchooser) may be affected
too -- this is not something, that would show up in a pristine build...