import QtQml.StateMachine not working

Hrovac

can someone please explain me why i cant import QtQm.StateMachine?
or better
point me to some documentation about it?

i cant find any explanations in the documentation.
https://doc.qt.io/qt-6/qtstatemachine-index.html
Thank you.

SGaist

Hi,

Did you apply the cmake/qmake configuration explained in that file ?

Hrovac

yes, as mentioned in the documentation i pasted

find_package(Qt6 REQUIRED COMPONENTS StateMachine)
target_link_libraries(mytarget PRIVATE Qt6::StateMachine)

into the CMakeLists.txt

but getting the following errormessages:

..\CMakeLists.txt:14: error: Found package configuration file: C:/Qt/6.4.2/android_armv7/lib/cmake/Qt6/Qt6Config.cmake but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT FOUND. Reason given by package: Failed to find required Qt component "StateMachine". Expected Config file at "C:/Qt/6.4.2/android_armv7/lib/cmake/Qt6StateMachine/Qt6StateMachineConfig.cmake" does NOT exist

Am i supposed to add more? sry, i'm a big noob and probably ask naive questions..

SGaist

Might be a silly question but did you check whether you have the module installed for that platform ?

Hrovac

ok, can you please explain to me how i check if this module is installed.
in which folder should it be located?

All modules i used up to now - where already installed and just had to be imported..

MhmRhm

I had the same issue. Adding the following cache variable or setting it in command line with -DQT_DEBUG_FIND_PACKAGE=ON, hinted the issue for me:

"QT_DEBUG_FIND_PACKAGE": "TRUE",

StateMachine depends on GUI and it depends on WrapOpenGL and that depends on glx library:

...

[cmake] -- Could NOT find OpenGL (missing: OPENGL_opengl_LIBRARY OPENGL_glx_LIBRARY OPENGL_INCLUDE_DIR) 
[cmake] -- Could NOT find OpenGL (missing: OPENGL_opengl_LIBRARY OPENGL_INCLUDE_DIR OpenGL) 
[cmake] -- Could NOT find WrapOpenGL (missing: WrapOpenGL_FOUND) 
[cmake] CMake Warning at /home/mohammad/vcpkg/scripts/buildsystems/vcpkg.cmake:904 (_find_package):
[cmake]   Found package configuration file:
[cmake] 
[cmake]     /home/mohammad/Qt/6.10.0/gcc_arm64/lib/cmake/Qt6Gui/Qt6GuiConfig.cmake
[cmake] 
[cmake]   but it set Qt6Gui_FOUND to FALSE so package "Qt6Gui" is considered to be
[cmake]   NOT FOUND.  Reason given by package:
[cmake] 
[cmake]   Qt6Gui could not be found because dependency WrapOpenGL could not be found.

...

[cmake]   Found package configuration file:
[cmake] 
[cmake]     /home/mohammad/Qt/6.10.0/gcc_arm64/lib/cmake/Qt6StateMachine/Qt6StateMachineConfig.cmake
[cmake] 
[cmake]   but it set Qt6StateMachine_FOUND to FALSE so package "Qt6StateMachine" is
[cmake]   considered to be NOT FOUND.  Reason given by package:
[cmake] 
[cmake]   Qt6StateMachine could not be found because dependency Qt6Gui could not be
[cmake]   found.

Installing one package fixed my issue:

sudo apt-get install libgl1-mesa-dev