KDE6 CMake - Kate plugin trying to link in wrong path

grmpf

Hi,
A while ago I made a plugin for the Kate text editor. This was done when my machine was still running Qt5/KDE5. Since my Manjaro LInux was updated to KDE6 I am in the process of updating this plugin to Qt6, but upon building I am running in a linking error. Obviously the INSTALL_NAMESPACE is interpreted/used differently in Qt6.

The build structure looks like this:
In $project_dir I run:

rm -rf build/
cmake -B build/ -D CMAKE_BUILD_TYPE=Release -D QT_MAJOR_VERSION=6
cmake --build build/

This was running flawless with Qt5 and would create a $plugin_name.so in the build folder. A subsequent

sudo cmake --install build/

would then copy the plugin .so to

/usr/lib/qt/plugins/ktexteditor/

After updating my CMakeLists.txt to use Qt6 I get this error:

[  0%] Built target kate_gpg_plugin_autogen_timestamp_deps
[ 14%] Automatic MOC for target kate_gpg_plugin
[ 14%] Built target kate_gpg_plugin_autogen
[ 28%] Building CXX object CMakeFiles/kate_gpg_plugin.dir/kate_gpg_plugin_autogen/mocs_compilation.cpp.o
[ 42%] Building CXX object CMakeFiles/kate_gpg_plugin.dir/kate_gpg_plugin.cpp.o
[ 57%] Building CXX object CMakeFiles/kate_gpg_plugin.dir/GPGKeyDetails.cpp.o
[ 71%] Building CXX object CMakeFiles/kate_gpg_plugin.dir/GPGMeWrapper.cpp.o
[ 85%] Linking CXX shared module /ktexteditor/kate_gpg_plugin.so
/usr/bin/ld: cannot open output file /ktexteditor/kate_gpg_plugin.so: No such file or directory
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/kate_gpg_plugin.dir/build.make:153: /ktexteditor/kate_gpg_plugin.so] Error 1
make[1]: *** [CMakeFiles/Makefile2:653: CMakeFiles/kate_gpg_plugin.dir/all] Error 2
make: *** [Makefile:146: all] Error 2

Where is the "/ktexteditor/" coming from? And is there any way to not use the install folder as the build folder?

SGaist

Hi and welcome to devnet,

I would recommend contacting the Kate developers. They will have more knowledge about the plugin building and installation.

grmpf

After a short discussion in the KDE bug tracker I have found the magic CMake lines and order to make it build with Qt6. Apparently there were some changes to the "kcoreaddons_add_plugin()" CMake call that now requires the KF_DEP_VERSION variable to be set in the very beginning (this wasn't so crucial in Qt5).

SGaist

Thanks for the feedback ! :-)