Bug#1038699: qt6-declarative-dev: files missing ... somehow

[Oswald Buddenhagen <oswald.buddenhagen@gmx.de>]

Package: qt6-declarative-dev
Version: 6.4.2+dfsg-1
Severity: normal

while building qt creator, cmake spits out this message during the 
generation phase (that is, after configuration is done):

======
CMake Error in src/plugins/qmldesigner/CMakeLists.txt:
  Imported target "Qt::QmlPrivate" includes non-existent path

    "/usr/include/x86_64-linux-gnu/qt6/QtQml/6.4.2"

  in its INTERFACE_INCLUDE_DIRECTORIES.  Possible reasons include:

  * The path was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and references files it does not
  provide.
======

i have no clue where this is coming from, because there are no obvious 
hits for QmlPrivate in the cmake directory.

but once i install qt6-declarative-private-dev, the error goes away.

i suppose this might be some dynamic magic in the upstream code that 
isn't prepared for actually being split into public and private.

-- System Information:
Debian Release: trixie/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.3.0-1-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=C, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages qt6-declarative-dev depends on:
ii  libqt6labsanimation6           6.4.2+dfsg-1
ii  libqt6labsfolderlistmodel6     6.4.2+dfsg-1
ii  libqt6labsqmlmodels6           6.4.2+dfsg-1
ii  libqt6labssettings6            6.4.2+dfsg-1
ii  libqt6labssharedimage6         6.4.2+dfsg-1
ii  libqt6labswavefrontmesh6       6.4.2+dfsg-1
ii  libqt6opengl6-dev              6.4.2+dfsg-11
ii  libqt6qml6                     6.4.2+dfsg-1
ii  libqt6qmlcompiler6             6.4.2+dfsg-1
ii  libqt6qmlcore6                 6.4.2+dfsg-1
ii  libqt6qmllocalstorage6         6.4.2+dfsg-1
ii  libqt6qmlmodels6               6.4.2+dfsg-1
ii  libqt6qmlworkerscript6         6.4.2+dfsg-1
ii  libqt6qmlxmllistmodel6         6.4.2+dfsg-1
ii  libqt6quick6                   6.4.2+dfsg-1
ii  libqt6quickcontrols2-6         6.4.2+dfsg-1
ii  libqt6quickcontrols2impl6      6.4.2+dfsg-1
ii  libqt6quickdialogs2-6          6.4.2+dfsg-1
ii  libqt6quickdialogs2quickimpl6  6.4.2+dfsg-1
ii  libqt6quickdialogs2utils6      6.4.2+dfsg-1
ii  libqt6quicklayouts6            6.4.2+dfsg-1
ii  libqt6quickparticles6          6.4.2+dfsg-1
ii  libqt6quickshapes6             6.4.2+dfsg-1
ii  libqt6quicktemplates2-6        6.4.2+dfsg-1
ii  libqt6quicktest6               6.4.2+dfsg-1
ii  libqt6quickwidgets6            6.4.2+dfsg-1
ii  qt6-base-dev                   6.4.2+dfsg-11
ii  qt6-declarative-dev-tools      6.4.2+dfsg-1
ii  qt6-qmltooling-plugins         6.4.2+dfsg-1

qt6-declarative-dev recommends no packages.

qt6-declarative-dev suggests no packages.

-- no debconf information