CMake Variable Reference
Module variables
When you use find_package, the resulting imported targets are created for use with target_link_libraries. Some variables are populated with information required to configure the build. For each module, the name of its imported target matches the name of the module with a "Qt5::" prefix, such as "Qt5::Widgets". All of the package-specific variables have a consistent name with its package name as prefix.
For example, find_package(Qt5 COMPONENTS Widgets), when successful, makes the following variables available:
| Variable | Description |
|---|---|
Qt5Widgets_VERSION | A string that describes the module's version. |
Qt5Widgets_LIBRARIES | A list of libraries for use with the target_link_libraries command. |
Qt5Widgets_INCLUDE_DIRS | A list of directories for use with the include_directories command. |
Qt5Widgets_DEFINITIONS | A list of definitions for use with the add_definitions command. |
Qt5Widgets_COMPILE_DEFINITIONS | A list of definitions for use with the COMPILE_DEFINITIONS target property. |
Qt5Widgets_FOUND | A boolean that describes whether the module was found successfully. |
Qt5Widgets_EXECUTABLE_COMPILE_FLAGS | A string of flags to use when building executables. |
For all packages found with find_package, equivalents of these variables are available; they are case-sensitive.
Installation variables
Additionally, there are also variables that don't relate to a particular package, but to the Qt installation itself.
| Variable | Description |
|---|---|
QT_VISIBILITY_AVAILABLE | On Unix, a boolean that describes whether Qt libraries and plugins were compiled with -fvisibility=hidden. This means that only selected symbols are exported. |
QT_LIBINFIX | A string that holds the infix used in library names, when Qt is configured with -libinfix. |
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