CMake Variable Reference | Qt 5.13

Qt 5.13 | CMake Variable Reference

Qt 5.13.1 Reference Documentation

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# 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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