KCoreAddons
KCoreAddons are addons to QtCore
KCoreAddons provides classes built on top of QtCore to perform various tasks such as manipulating mime types, autosaving files, creating backup files, generating random sequences, performing text manipulations such as macro replacement, accessing user information and many more.
Using the Module
Using a KDE module's C++ API requires linking against the module library. The preferred way of consuming the library is through CMake.
Building with CMake
Use the find_package() command to locate the needed module component in the KF6 package:
find_package(KF6 REQUIRED COMPONENTS CoreAddons)
target_link_libraries(mytarget PRIVATE KF6::CoreAddons)
For more details, see the Build with CMake overview.