[QGIS-Developer] Fail compiing WITH_3D on ubuntu 20.04 - Qt53DExtras config files missing

[Alexandre Neto]

Hi,

I have been having problems compiling QGIS with 3D support on Kubuntu
20.04. This is the CCMAKE configuration error:

CMake Error at /usr/lib/x86_64-linux-gnu/cmake/Qt5/Qt5Config.cmake:28
(find_package):
  Could not find a package configuration file provided by "Qt53DExtras"
with
  any of the following names:

    Qt53DExtrasConfig.cmake
    qt53dextras-config.cmake

  Add the installation prefix of "Qt53DExtras" to CMAKE_PREFIX_PATH or set
  "Qt53DExtras_DIR" to a directory containing one of the above files.  If
  "Qt53DExtras" provides a separate development package or SDK, be sure it
  has been installed.
Call Stack (most recent call first):
  CMakeLists.txt:455 (find_package)

I have libQt53DExtras installed, but there are no configuration files like
for other QT5 libraries. I tried to follow the suggestion and add the
installation prefix to CMAKE_PREFIX_PATH as suggested, but either it does
not work, or I am doing it wrong:

ccmake -G Ninja .. -DMAKE_PREFIX_PATH=/usr/lib/x86_64-linux-gnu/

Anyone is facing similar problems? any hint?

Thanks,

Alexandre Neto
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