CheckAtomic¶

Check if the compiler supports std:atomic out of the box or if libatomic is needed for atomic support. If it is needed libatomicis added to CMAKE_REQUIRED_LIBRARIES. So after running CheckAtomic you can use std:atomic.

Since 5.75.0.

ECMAddAppIcon¶

Add icons to executable files and packages.

ecm_add_app_icon(<sources_var_name(|target (since 5.83))>


                 ICONS <icon> [<icon> [...]]


                 [SIDEBAR_ICONS <icon> [<icon> [...]] # Since 5.49


                 [OUTFILE_BASENAME <name>]) # Since 5.49


                 )

The given icons, whose names must match the pattern:

<size>-<other_text>.png

will be added as platform-specific application icons to the variable named <sources_var_name> or, if the first argument is a target (since 5.83), to the SOURCES property of <target>. Any target must be created with add_executable() and not be an alias.

Other icon files are ignored but on Mac SVG files can be supported and it is thus possible to mix those with png files in a single macro call.

The platforms currently supported are Windows and Mac OS X, on all others the call has no effect and is ignored.

<size> is a numeric pixel size (typically 16, 32, 48, 64, 128 or 256). <other_text> can be any other text. See the platform notes below for any recommendations about icon sizes.

SIDEBAR_ICONS can be used to add Mac OS X sidebar icons to the generated iconset. They are used when a folder monitored by the application is dragged into Finder’s sidebar. Since 5.49.

OUTFILE_BASENAME will be used as the basename for the icon file. If you specify it, the icon file will be called <OUTFILE_BASENAME>.icns on Mac OS X and <OUTFILE_BASENAME>.ico on Windows. If you don’t specify it, it defaults to <sources_var_name>.<ext>. Since 5.49.

Since 1.7.0.

ECMAddQch¶

This module provides the ecm_add_qch function for generating API documentation files in the QCH format, and the ecm_install_qch_export function for generating and installing exported CMake targets for such generated QCH files to enable builds of other software with generation of QCH files to create links into the given QCH files.

ecm_add_qch(<target_name>


    NAME <name>


    VERSION <version>


    QCH_INSTALL_DESTINATION <qchfile_install_path>


    TAGFILE_INSTALL_DESTINATION <tagsfile_install_path>


    [COMPONENT <component>]


    [BASE_NAME <basename>]


    [SOURCE_DIRS <dir> [<dir2> [...]]]


    [SOURCES <file> [<file2> [...]]]


    |MD_MAINPAGE <md_file>]


    [INCLUDE_DIRS <incdir> [<incdir2> [...]]]


    [IMAGE_DIRS <idir> [<idir2> [...]]]


    [EXAMPLE_DIRS <edir> [<edir2> [...]]]


    [ORG_DOMAIN <domain>]


    [NAMESPACE <namespace>]


    [LINK_QCHS <qch> [<qch2> [...]]]


    [PREDEFINED_MACROS <macro[=content]> [<macro2[=content]> [...]]]


    [BLANK_MACROS <macro> [<macro2> [...]]]


    [CONFIG_TEMPLATE <configtemplate_file>]


    [VERBOSE]
)

This macro adds a target called <target_name> for the creation of an API documentation manual in the QCH format from the given sources. It currently uses doxygen, future versions might optionally also allow other tools. Next to the QCH file the target will generate a corresponding doxygen tag file, which enables creating links from other documentation into the generated QCH file.

It is recommended to make the use of this macro optional, by depending the call to ecm_add_qch on a CMake option being set, with a name like BUILD_QCH and being TRUE by default. This will allow the developers to saves resources on normal source development build cycles by setting this option to FALSE.

The macro will set the target properties DOXYGEN_TAGFILE, QHP_NAMESPACE, QHP_NAMESPACE_VERSIONED, QHP_VIRTUALFOLDER and LINK_QCHS to the respective values, to allow other code access to them, e.g. the macro ecm_install_qch_export. To enable the use of the target <target_name> as item for LINK_QCHS in further ecm_add_qch calls in the current build, additionally a target property DOXYGEN_TAGFILE_BUILD is set, with the path of the created doxygen tag file in the build dir. If existing, ecm_add_qch will use this property instead of DOXYGEN_TAGFILE for access to the tags file.

NAME specifies the name for the generated documentation.

VERSION specifies the version of the library for which the documentation is created.

BASE_NAME specifies the base name for the generated files. The default basename is <name>.

SOURCE_DIRS specifies the dirs (incl. subdirs) with the source files for which the API documentation should be generated. Dirs can be relative to the current source dir. Dependencies to the files in the dirs are not tracked currently, other than with the SOURCES argument. So do not use for sources generated during the build. Needs to be used when SOURCES or CONFIG_TEMPLATE are not used.

SOURCES specifies the source files for which the API documentation should be generated. Needs to be used when SOURCE_DIRS or CONFIG_TEMPLATE are not used.

MD_MAINPAGE specifies a file in Markdown format that should be used as main page. This page will overrule any \mainpage command in the included sources.

INCLUDE_DIRS specifies the dirs which should be searched for included headers. Dirs can be relative to the current source dir. Since 5.63.

IMAGE_DIRS specifies the dirs which contain images that are included in the documentation. Dirs can be relative to the current source dir.

EXAMPLE_DIRS specifies the dirs which contain examples that are included in the documentation. Dirs can be relative to the current source dir.

QCH_INSTALL_DESTINATION specifies where the generated QCH file will be installed.

TAGFILE_INSTALL_DESTINATION specifies where the generated tag file will be installed.

COMPONENT specifies the installation component name with which the install rules for the generated QCH file and tag file are associated.

NAMESPACE can be used to set a custom namespace <namespace> of the generated QCH file. The namepspace is used as the unique id by QHelpEngine (cmp. https://doc.qt.io/qt-5/qthelpproject.html#namespace). The default namespace is <domain>.<name>. Needs to be used when ORG_DOMAIN is not used.

ORG_DOMAIN can be used to define the organization domain prefix for the default namespace of the generated QCH file. Needs to be used when NAMESPACE is not used.

LINK_QCHS specifies a list of other QCH targets which should be used for creating references to API documentation of code in external libraries. For each target <qch> in the list these target properties are expected to be defined: DOXYGEN_TAGFILE, QHP_NAMESPACE and QHP_VIRTUALFOLDER. If any of these is not existing, <qch> will be ignored. Use the macro ecm_install_qch_export for exporting a target with these properties with the CMake config of a library. Any target <qch> can also be one created before in the same buildsystem by another call of ecm_add_qch.

PREDEFINED_MACROS specifies a list of C/C++ macros which should be handled as given by the API dox generation tool. Examples are macros only defined in generated files, so whose definition might be not available to the tool.

BLANK_MACROS specifies a list of C/C++ macro names which should be ignored by the API dox generation tool and handled as if they resolve to empty strings. Examples are export macros only defined in generated files, so whose definition might be not available to the tool.

CONFIG_TEMPLATE specifies a custom cmake template file for the config file that is created to control the execution of the API dox generation tool. The following CMake variables need to be used: - ECM_QCH_DOXYGEN_QHELPGENERATOR_EXECUTABLE - ECM_QCH_DOXYGEN_FILEPATH, ECM_QCH_DOXYGEN_TAGFILE The following CMake variables can be used: - ECM_QCH_DOXYGEN_PROJECTNAME - ECM_QCH_DOXYGEN_PROJECTVERSION - ECM_QCH_DOXYGEN_VIRTUALFOLDER - ECM_QCH_DOXYGEN_FULLNAMESPACE - ECM_QCH_DOXYGEN_TAGFILES - ECM_QCH_DOXYGEN_WARN_LOGFILE - ECM_QCH_DOXYGEN_QUIET There is no guarantue that the other CMake variables currently used in the default config file template will also be present with the same semantics in future versions of this macro.

VERBOSE tells the API dox generation tool to be more verbose about its activity.

The default config file for the API dox generation tool, so the one when not using CONFIG_TEMPLATE, allows code to handle the case of being processed by the tool by defining the C/C++ preprocessor macro K_DOXYGEN when run (since v5.67.0). For backward-compatibility also the definition DOXYGEN_SHOULD_SKIP_THIS is set, but its usage is deprecated.

Example usage:

ecm_add_qch(


    MyLib_QCH


    NAME MyLib


    VERSION "0.42.0"


    ORG_DOMAIN org.myorg


    SOURCE_DIRS


        src


    LINK_QCHS


        Qt5Core_QCH


        Qt5Xml_QCH


        Qt5Gui_QCH


        Qt5Widgets_QCH


    BLANK_MACROS


        MyLib_EXPORT


        MyLib_DEPRECATED


    TAGFILE_INSTALL_DESTINATION ${CMAKE_INSTALL_PREFIX}/share/docs/tags


    QCH_INSTALL_DESTINATION ${CMAKE_INSTALL_PREFIX}/share/docs/qch


    COMPONENT Devel
)

Example usage (with two QCH files, second linking first):

ecm_add_qch(


    MyLib_QCH


    NAME MyLib


    VERSION ${MyLib_VERSION}


    ORG_DOMAIN org.myorg


    SOURCES ${MyLib_PUBLIC_HEADERS}


    MD_MAINPAGE src/mylib/README.md


    LINK_QCHS Qt5Core_QCH


    TAGFILE_INSTALL_DESTINATION ${CMAKE_INSTALL_PREFIX}/share/docs/tags


    QCH_INSTALL_DESTINATION ${CMAKE_INSTALL_PREFIX}/share/docs/qch


    COMPONENT Devel
)
ecm_add_qch(


    MyOtherLib_QCH


    NAME MyOtherLib


    VERSION ${MyOtherLib_VERSION}


    ORG_DOMAIN org.myorg


    SOURCES ${MyOtherLib_PUBLIC_HEADERS}


    MD_MAINPAGE src/myotherlib/README.md


    LINK_QCHS Qt5Core_QCH MyLib_QCH


    TAGFILE_INSTALL_DESTINATION ${CMAKE_INSTALL_PREFIX}/share/docs/tags


    QCH_INSTALL_DESTINATION ${CMAKE_INSTALL_PREFIX}/share/docs/qch


    COMPONENT Devel
)

ecm_install_qch_export(


    TARGETS [<name> [<name2> [...]]]


    FILE <file>


    DESTINATION <dest>


    [COMPONENT <component>]
)

This macro creates and installs a CMake file <file> which exports the given QCH targets <name> etc., so they can be picked up by CMake-based builds of other software that also generate QCH files (using ecm_add_qch) and which should include links to the QCH files created by the given targets. The installed CMake file <file> is expected to be included by the CMake config file created for the software the related QCH files are documenting.

TARGETS specifies the QCH targets which should be exported. If a target does not exist or does not have all needed properties, a warning will be generated and the target skipped. This behaviour might change in future versions to result in a fail instead.

FILE specifies the name of the created CMake file, typically with a .cmake extension.

DESTINATION specifies the directory on disk to which the file will be installed. It usually is the same as the one where the CMake config files for this software are installed.

COMPONENT specifies the installation component name with which the install rule is associated.

Example usage:

ecm_install_qch_export(


    TARGETS MyLib_QCH


    FILE MyLibQCHTargets.cmake


    DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/cmake/MyLib"


    COMPONENT Devel
)

Since 5.36.0.

ECMAddQtDesignerPlugin¶

This module provides the ecm_add_qtdesignerplugin function for generating Qt Designer plugins for custom widgets. Each of those widgets is described using a second function ecm_qtdesignerplugin_widget.

ecm_add_qtdesignerplugin(<target_name>


    NAME <name>


    WIDGETS <widgetid> [<widgetid2> [...]]


    LINK_LIBRARIES <lib> [<lib2> [...]]


    INSTALL_DESTINATION <install_path>


    [OUTPUT_NAME <output_name>]


    [DEFAULT_GROUP <group>]


    [DEFAULT_HEADER_CASE <SAME_CASE|LOWER_CASE|UPPER_CASE>]


    [DEFAULT_HEADER_EXTENSION <header_extension>]


    [DEFAULT_ICON_DIR <icon_dir>]


    [INCLUDE_FILES <include_file> [<include_file2> [...]]]


    [SOURCES <src> [<src2> [...]]]


    [COMPONENT <component>]
)

NAME specifies the base name to use in the generated sources. The default is <target_name>.

WIDGETS specifies the widgets the plugin should support. Each widget has to be defined before by a call of ecm_qtdesignerplugin_widget with the respective <widgetid>, in a scope including the current call.

LINK_LIBRARIES specifies the libraries to link against. This will be at least the library providing the widget class(es).

INSTALL_DESTINATION specifies where the generated plugin binary will be installed.

OUTPUT_NAME specifies the name of the plugin binary. The default is “<target_name>”.

DEFAULT_GROUP specifies the default group in Qt Designer where the widgets will be placed. The default is “Custom”.

DEFAULT_HEADER_CASE specifies how the name of the header is derived from the widget class name. The default is “LOWER_CASE”.

DEFAULT_HEADER_EXTENSION specifies what file name extension is used for the header file derived from the class name. The default is “h”.

DEFAULT_ICON_DIR specifies what file name extension is used for the header file derived from the class name. The default is “pics”.

INCLUDE_FILES specifies additional include files to include with the generated source file. This can be needed for custom code used in initializing or creating widgets.

SOURCES specifies additional source files to build the plugin from. This can be needed to support custom code used in initializing or creating widgets.

COMPONENT specifies the installation component name with which the install rules for the generated plugin are associated.

ecm_qtdesignerplugin_widget(<widgetid>


    [CLASS_NAME <class_name>]


    [INCLUDE_FILE <include_file>]


    [CONTAINER]


    [ICON <iconfile>]


    [TOOLTIP <tooltip>]


    [WHATSTHIS <whatsthis>]


    [GROUP <group>]


    [CREATE_WIDGET_CODE_FROM_VARIABLE <create_widget_code_variable>]


    [INITIALIZE_CODE_FROM_VARIABLE <initialize_code_variable]


    [DOM_XML_FROM_VARIABLE <dom_xml_variable>]


    [IMPL_CLASS_NAME <impl_class_name>]


    [CONSTRUCTOR_ARGS_CODE <constructor_args_code>]


    [CONSTRUCTOR_ARGS_CODE_FROM_VARIABLE <constructor_args_code_variable>]
)

CLASS_NAME specifies the name of the widget class, including namespaces. The default is “<widgetid>”.

INCLUDE_FILE specifies the include file to use for the class of this widget. The default is derived from <class_name> as configured by the DEFAULT_HEADER_* options of ecm_add_qtdesignerplugin, also replacing any namespace separators with “/”.

CONTAINER specifies, if set, that this widget is a container for other widgets.

ICON specifies the icon file to use as symbol for this widget. The default is “{lowercased <class_name>}.png” in the default icons dir as configured by the DEFAULT_ICON_DIR option of ecm_add_qtdesignerplugin, if such a file exists.

TOOLTIP specifies the tooltip text to use for this widget. Default is “<class_name> Widget”.

WHATSTHIS specifies the What’s-This text to use for this widget. Defaults to the tooltip.

GROUP specifies the group in Qt Designer where the widget will be placed. The default is set as configured by the DEFAULT_GROUP option of ecm_add_qtdesignerplugin.

CREATE_WIDGET_CODE_FROM_VARIABLE specifies the variable to get from the C++ code to use as factory code to create an instance of the widget, for the override of QDesignerCustomWidgetInterface::createWidget(QWidget* parent). The default is “return new <impl_class_name><constructor_args_code>;”.

INITIALIZE_CODE_FROM_VARIABLE specifies the variable to get from the C++ code to use with the override of QDesignerCustomWidgetInterface::initialize(QDesignerFormEditorInterface* core). The code has to use the present class member m_initialized to track and update the state. The default code simply sets m_initialized to true, if it was not before.

DOM_XML_FROM_VARIABLE specifies the variable to get from the string to use with the optional override of QDesignerCustomWidgetInterface::domXml(). Default does not override.

IMPL_CLASS_NAME specifies the name of the widget class to use for the widget instance with Qt Designer. The default is “<class_name>”.

CONSTRUCTOR_ARGS_CODE specifies the C++ code to use for the constructor arguments with the default of CREATE_WIDGET_CODE_FROM_VARIABLE. Note that the parentheses are required. The default is “(parent)”.

CONSTRUCTOR_ARGS_CODE_FROM_VARIABLE specifies the variable to get from the C++ code instead of passing it directly via CONSTRUCTOR_ARGS_CODE. This can be needed if the code is more complex and e.g. includes “;” chars.

Example usage:

ecm_qtdesignerplugin_widget(FooWidget


    TOOLTIP "Enables to browse foo."


    GROUP "Views (Foo)"
)
set(BarWidget_CREATE_WIDGET_CODE
"


    auto* widget = new BarWidget(parent);


    widget->setBar("Example bar");


    return widget;
")
ecm_qtdesignerplugin_widget(BarWidget


    TOOLTIP "Displays bars."


    GROUP "Display (Foo)"


    CREATE_WIDGET_CODE_FROM_VARIABLE BarWidget_CREATE_WIDGET_CODE
)
ecm_add_qtdesignerplugin(foowidgets


    NAME FooWidgets


    OUTPUT_NAME foo2widgets


    WIDGETS


        FooWidget


        BarWidget


    LINK_LIBRARIES


        Foo::Widgets


    INSTALL_DESTINATION "${KDE_INSTALL_QTPLUGINDIR}/designer"


    COMPONENT Devel
)

Since 5.62.0.

ECMAddTests¶

Convenience functions for adding tests.

ecm_add_tests(<sources> LINK_LIBRARIES <library> [<library> [...]]


                        [NAME_PREFIX <prefix>]


                        [GUI]


                        [TARGET_NAMES_VAR <target_names_var>]


                        [TEST_NAMES_VAR <test_names_var>])

A convenience function for adding multiple tests, each consisting of a single source file. For each file in <sources>, an executable target will be created (the name of which will be the basename of the source file). This will be linked against the libraries given with LINK_LIBRARIES. Each executable will be added as a test with the same name.

If NAME_PREFIX is given, this prefix will be prepended to the test names, but not the target names. As a result, it will not prevent clashes between tests with the same name in different parts of the project, but it can be used to give an indication of where to look for a failing test.

If the flag GUI is passed the test binaries will be GUI executables, otherwise the resulting binaries will be console applications (regardless of the value of CMAKE_WIN32_EXECUTABLE or CMAKE_MACOSX_BUNDLE). Be aware that this changes the executable entry point on Windows (although some frameworks, such as Qt, abstract this difference away).

The tests will be build with -DQT_FORCE_ASSERTS to enable assertions in the test executable even for release builds.

The TARGET_NAMES_VAR and TEST_NAMES_VAR arguments, if given, should specify a variable name to receive the list of generated target and test names, respectively. This makes it convenient to apply properties to them as a whole, for example, using set_target_properties() or set_tests_properties().

The generated target executables will have the effects of ecm_mark_as_test() (from the ECMMarkAsTest module) applied to it.

ecm_add_test(<sources> LINK_LIBRARIES <library> [<library> [...]]


                       [TEST_NAME <name>]


                       [NAME_PREFIX <prefix>]


                       [GUI])

This is a single-test form of ecm_add_tests that allows multiple source files to be used for a single test. If using multiple source files, TEST_NAME must be given; this will be used for both the target and test names (and, as with ecm_add_tests(), the NAME_PREFIX argument will be prepended to the test name).

Since pre-1.0.0.

ECMCheckOutboundLicense¶

Assert that source file licenses are compatible with a desired outbound license of a compiled binary artifact (e.g., library, plugin or application).

This module provides the ecm_check_outbound_license function that generates unit tests for checking the compatibility of license statements. The license statements in all tested files are required to be added by using the SPDX marker SPDX-License-Identifier.

During the CMake configuration of the project, a temporary license bill of materials (BOM) in SPDX format is generated by calling the REUSE tool (see <https://reuse.software>). That BOM is parsed and license computations based on an internal compatibility matrix are performed.

When this module is included, a SKIP_LICENSE_TESTS option is added (default OFF). Turning this option on skips the generation of license tests, which might be convenient if licenses shall not be tested in all build configurations.

ecm_check_outbound_license(LICENSES <outbound-licenses>


                           FILES <source-files>


                           [TEST_NAME <name>]


                           [WILL_FAIL])

This method adds a custom unit test to ensure the specified outbound license to be compatible with the specified license headers. Note that a convenient way is to use the CMake GLOB argument of the FILE function.

FILES:

List of source files that contain valid SPDX-License-Identifier markers. The paths can be relative to the CMake file that generates the test case or be absolute paths.

TEST_NAME

Optional parameter that defines the name of the generated test case. If no name is defined, the relative path to the test directory with appended license name is used. Every test has licensecheck_ as prefix.

WILL_FAIL

Optional parameter that inverts the test result. This parameter is usually only used for tests of the module.

Since 5.75.0

ECMConfiguredInstall¶

Takes a list of files, runs configure_file on each and installs the resultant configured files in the given location.

Any suffix of “.in” in the passed file names will be stripped from the file name at the installed location.

ecm_install_configured_files(


    INPUT <file> [<file2> [...]]


    DESTINATION <INSTALL_DIRECTORY>


    [COPYONLY]


    [ESCAPE_QUOTES]


    [@ONLY]


    [COMPONENT <component>])

Example usage:

ecm_install_configured_files(INPUT foo.txt.in DESTINATION ${KDE_INSTALL_DATADIR} @ONLY)

This will install the file as foo.txt with any cmake variable replacements made into the data directory.

Since 5.73.0.

ECMCoverageOption¶

Allow users to easily enable GCov code coverage support.

Code coverage allows you to check how much of your codebase is covered by your tests. This module makes it easy to build with support for GCov.

When this module is included, a BUILD_COVERAGE option is added (default OFF). Turning this option on enables GCC’s coverage instrumentation, and links against libgcov.

NOTE:

Since 1.3.0.

ECMCreateQmFromPoFiles¶

WARNING:

Generate QTranslator (.qm) catalogs from Gettext (.po) catalogs.

ecm_create_qm_from_po_files(PO_FILES <file1>... <fileN>


                            [CATALOG_NAME <catalog_name>]


                            [INSTALL_DESTINATION <install_destination>])

Creates the necessary rules to compile .po files into .qm files, and install them.

The .qm files are installed in <install_destination>/<lang>/LC_MESSAGES, where <install_destination> is the INSTALL_DESTINATION argument and <lang> is extracted from the “Language” field inside the .po file.

INSTALL_DESTINATION defaults to ${LOCALE_INSTALL_DIR} if defined, otherwise it uses ${CMAKE_INSTALL_LOCALEDIR} if that is defined, otherwise it uses share/locale.

CATALOG_NAME defines the name of the installed .qm files. If set, .qm files will be installed as <catalog_name>.qm. If not set .qm files will be named after the name of their source .po file.

Setting the catalog name is useful when all .po files for a target are kept in a single source directory. For example, the “mylib” probject might keep all its translations in a “po” directory, like this:

po/


    es.po


    fr.po

Without setting CATALOG_NAME, those .po will be turned into .qm and installed as:

share/locale/fr/LC_MESSAGES/fr.qm
share/locale/es/LC_MESSAGES/es.qm

If CATALOG_NAME is set to “mylib”, they will be installed as:

share/locale/fr/LC_MESSAGES/mylib.qm
share/locale/es/LC_MESSAGES/mylib.qm

Which is what the loader created by ecm_create_qm_loader() expects.

ecm_create_qm_from_po_files() creates a “translation” target. This target builds all .po files into .qm files.

ecm_create_qm_loader(<source_files_var> <catalog_name>)

ecm_create_qm_loader() generates a C++ file which ensures translations are automatically loaded at startup. The path of the .cpp file is appended to <source_files_var>. Typical usage is like:

set(mylib_SRCS foo.cpp bar.cpp)
ecm_create_qm_loader(mylib_SRCS mylib)
add_library(mylib ${mylib_SRCS})

This generates a C++ file which loads “mylib.qm” at startup, assuming it has been installed by ecm_create_qm_from_po_files(), and compiles it into mylib.

Since pre-1.0.0.

ECMDeprecationSettings¶

This module provides the ecm_set_disabled_deprecation_versions function setting the excluding deprecated API for Qt and KF projects.

This method expects pairs of the identifier and deprecation version. For the identifier QT this functions adds the definition QT_DISABLE_DEPRECATED_BEFORE with the given version in a hexadecimal format. Otherwise the name for the definition is generated using ${IDENTIFIER}_DISABLE_DEPRECATED_BEFORE_AND_AT, following the naming of the generated code in ECMGenerateExportHeader. The version for the definition can be overwritten, by passing definition name and the deprecation version as a CMake definition. This allows one to exclude deprecations without having to edit the CMakeLists.txt file.

This module provides the following function:

ecm_set_disabled_deprecation_versions(


    [DISABLE_NEWER_WARNINGS] # since 5.96


    [<identifier> <deprecation_version>]


    [<identifier2> <deprecation_version2>]
)

DISABLE_NEWER_WARNINGS disables additionally the compiler warnings for API deprecated in newer versions of the same major version.

Example usage:

set(QT_MIN_VERSION "5.15.2")
set(KF5_MIN_VERSION "5.90")
ecm_set_disabled_deprecation_versions(


  QT ${QT_MIN_VERSION}


  KF ${KF5_MIN_VERSION}


  KCOREADDONS 5.89.0 # In case we depend on deprecated KCoreAddons API
)

Since 5.91

ECMEnableSanitizers¶

Enable compiler sanitizer flags.

The following sanitizers are supported:

All of them are implemented in Clang, depending on your version, and there is an work in progress in GCC, where some of them are currently implemented.

This module will check your current compiler version to see if it supports the sanitizers that you want to enable

Usage¶

Simply add:

include(ECMEnableSanitizers)

to your CMakeLists.txt. Note that this module is included in KDECompilerSettings, so projects using that module do not need to also include this one.

The sanitizers are not enabled by default. Instead, you must set ECM_ENABLE_SANITIZERS (either in your CMakeLists.txt or on the command line) to a semicolon-separated list of sanitizers you wish to enable. The options are:

The sanitizers “address”, “memory” and “thread” are mutually exclusive. You cannot enable two of them in the same build.

“leak” requires the “address” sanitizer.

NOTE:

Example¶

This is an example of usage:

mkdir build
cd build
cmake -DECM_ENABLE_SANITIZERS='address;leak;undefined' ..

NOTE:

-DCMAKE_CXX_COMPILER=clang++

Since 1.3.0.

ECMFindModuleHelpers¶

Helper macros for find modules: ecm_find_package_version_check(), ecm_find_package_parse_components() and ecm_find_package_handle_library_components().

ecm_find_package_version_check(<name>)

Prints warnings if the CMake version or the project’s required CMake version is older than that required by extra-cmake-modules.

ecm_find_package_parse_components(<name>


    RESULT_VAR <variable>


    KNOWN_COMPONENTS <component1> [<component2> [...]]


    [SKIP_DEPENDENCY_HANDLING])

This macro will populate <variable> with a list of components found in <name>_FIND_COMPONENTS, after checking that all those components are in the list of KNOWN_COMPONENTS; if there are any unknown components, it will print an error or warning (depending on the value of <name>_FIND_REQUIRED) and call return().

The order of components in <variable> is guaranteed to match the order they are listed in the KNOWN_COMPONENTS argument.

If SKIP_DEPENDENCY_HANDLING is not set, for each component the variable <name>_<component>_component_deps will be checked for dependent components. If <component> is listed in <name>_FIND_COMPONENTS, then all its (transitive) dependencies will also be added to <variable>.

ecm_find_package_handle_library_components(<name>


    COMPONENTS <component> [<component> [...]]


    [SKIP_DEPENDENCY_HANDLING])


    [SKIP_PKG_CONFIG])

Creates an imported library target for each component. The operation of this macro depends on the presence of a number of CMake variables.

The <name>_<component>_lib variable should contain the name of this library, and <name>_<component>_header variable should contain the name of a header file associated with it (whatever relative path is normally passed to ‘#include’). <name>_<component>_header_subdir variable can be used to specify which subdirectory of the include path the headers will be found in. ecm_find_package_components() will then search for the library and include directory (creating appropriate cache variables) and create an imported library target named <name>::<component>.

Additional variables can be used to provide additional information:

If SKIP_PKG_CONFIG, the <name>_<component>_pkg_config variable is set, and pkg-config is found, the pkg-config module given by <name>_<component>_pkg_config will be searched for and used to help locate the library and header file. It will also be used to set <name>_<component>_VERSION.

Note that if version information is found via pkg-config, <name>_<component>_FIND_VERSION can be set to require a particular version for each component.

If SKIP_DEPENDENCY_HANDLING is not set, the INTERFACE_LINK_LIBRARIES property of the imported target for <component> will be set to contain the imported targets for the components listed in <name>_<component>_component_deps. <component>_FOUND will also be set to FALSE if any of the components in <name>_<component>_component_deps are not found. This requires the components in <name>_<component>_component_deps to be listed before <component> in the COMPONENTS argument.

The following variables will be set:

NOTE:

Since pre-1.0.0.

ECMFindQmlModule¶

Find QML import modules through a find_qmlmodule() call. It uses the qmlplugindump application to find the plugins and sets them up as runtime dependencies.

This is useful so that when we configure a project we are notified when some QML imports are not present in the system, thus having the application compilable but fail at runtime.

ecm_find_qmlmodule(<module_name> <version>...)

Any further arguments passed will be forwarded into a find_package() call. See find_package() documentation for more information.

Usage example:

ecm_find_qmlmodule(org.kde.kirigami 2.1)

Since 5.38.0.

ECMGenerateDBusServiceFile¶

This module provides the ecm_generate_dbus_service_file function for generating and installing a D-Bus service file.

ecm_generate_dbus_service_file(


    NAME <service name>


    EXECUTABLE <executable>


    [SYSTEMD_SERVICE <systemd service>]


    DESTINATION <install_path>


    [RENAME <dbus service filename>] # Since 5.75
)

A D-Bus service file <service name>.service will be generated and installed in the relevant D-Bus config location. This filename can be customized with RENAME.

<executable> must be an absolute path to the installed service executable. When using it with KDEInstallDirs it needs to be the _FULL_ variant of the path variable.

NOTE:

Optionally, a <systemd service> can be specified to launch the corresponding systemd service instead of the <executable> if the D-Bus daemon is started by systemd.

Example usage:

ecm_generate_dbus_service_file(


    NAME org.kde.kded5


    EXECUTABLE ${KDE_INSTALL_FULL_BINDIR}/kded5


    DESTINATION ${KDE_INSTALL_DBUSSERVICEDIR}
)

ecm_generate_dbus_service_file(


    NAME org.kde.kded5


    EXECUTABLE ${KDE_INSTALL_FULL_BINDIR}/kded5


    SYSTEMD_SERVICE plasma-kded.service


    DESTINATION ${KDE_INSTALL_DBUSSERVICEDIR}


    RENAME org.kde.daemon.service
)

Since 5.73.0.

ECMGenerateExportHeader¶

This module provides the ecm_generate_export_header function for generating export macros for libraries with version-based control over visibility of and compiler warnings for deprecated API for the library user, as well as over excluding deprecated API and their implementation when building the library itself.

For preparing some values useful in the context it also provides a function ecm_export_header_format_version.

ecm_generate_export_header(<library_target_name>


    VERSION <version>


    [BASE_NAME <base_name>]


    [GROUP_BASE_NAME <group_base_name>]


    [EXPORT_MACRO_NAME <export_macro_name>]


    [EXPORT_FILE_NAME <export_file_name>]


    [DEPRECATED_MACRO_NAME <deprecated_macro_name>]


    [NO_EXPORT_MACRO_NAME <no_export_macro_name>]


    [INCLUDE_GUARD_NAME <include_guard_name>]


    [STATIC_DEFINE <static_define>]


    [PREFIX_NAME <prefix_name>]


    [DEPRECATED_BASE_VERSION <deprecated_base_version>]


    [DEPRECATION_VERSIONS <deprecation_version> [<deprecation_version2> [...]]]


    [EXCLUDE_DEPRECATED_BEFORE_AND_AT <exclude_deprecated_before_and_at_version>]


    [NO_BUILD_SET_DEPRECATED_WARNINGS_SINCE]


    [NO_DEFINITION_EXPORT_TO_BUILD_INTERFACE]


    [CUSTOM_CONTENT_FROM_VARIABLE <variable>]
)

VERSION specifies the version of the library, given in the format “<major>.<minor>.<patchlevel>”.

GROUP_BASE_NAME specifies the name to use for the macros defining library group default values. If set, this will generate code supporting <group_base_name>_NO_DEPRECATED_WARNINGS, <group_base_name>_DISABLE_DEPRECATED_BEFORE_AND_AT, <group_base_name>_DEPRECATED_WARNINGS_SINCE and <group_base_name>_NO_DEPRECATED (see below). If not set, the generated code will ignore any such macros.

DEPRECATED_BASE_VERSION specifies the default version before and at which deprecated API is disabled. Possible values are “0”, “CURRENT” (which resolves to <version>) and a version string in the format “<major>.<minor>.<patchlevel>”. The default is the value of “<exclude_deprecated_before_and_at_version>” if set, or “<major>.0.0”, with <major> taken from <version>.

DEPRECATION_VERSIONS specifies versions in “<major>.<minor>” format in which API was declared deprecated. Any version used with the generated macro <prefix_name><base_name>_DEPRECATED_VERSION(major, minor, text) or <prefix_name><base_name>_DEPRECATED_VERSION_BELATED(major, minor, textmajor, textminor, text) needs to be listed here, otherwise the macro will fail to work.

EXCLUDE_DEPRECATED_BEFORE_AND_AT specifies the version for which all API deprecated before and at should be excluded from the build completely. Possible values are “0” (default), “CURRENT” (which resolves to <version>) and a version string in the format “<major>.<minor>.<patchlevel>”.

NO_BUILD_SET_DEPRECATED_WARNINGS_SINCE specifies that the definition <prefix_name><uppercase_base_name>_DEPRECATED_WARNINGS_SINCE will not be set for the library inside its own build, and thus will be defined by either explicit definition in the build system configuration or by the default value mechanism (see below). The default is that it is set for the build, to the version specified by EXCLUDE_DEPRECATED_BEFORE_AND_AT, so no deprecation warnings are done for any own deprecated API used in the library implementation itself.

NO_DEFINITION_EXPORT_TO_BUILD_INTERFACE specifies that the definition <prefix_name><uppercase_base_name>_DISABLE_DEPRECATED_BEFORE_AND_AT will not be set in the public interface of the library inside its own build, and the same for the definition <prefix_name><uppercase_base_name>_DEPRECATED_WARNINGS_SINCE (if not disabled by NO_BUILD_SET_DEPRECATED_WARNINGS_SINCE already). The default is that they are set, to the version specified by EXCLUDE_DEPRECATED_BEFORE_AND_AT, so e.g. test and examples part of the project automatically build against the full API included in the build and without any deprecation warnings for it.

CUSTOM_CONTENT_FROM_VARIABLE specifies the name of a variable whose content will be appended at the end of the generated file, before any final inclusion guard closing. Note that before 5.98 this was broken and would only append the string passed as argument value.

The function ecm_generate_export_header defines C++ preprocessor macros in the generated export header, some for use in the sources of the library the header is generated for, other for use by projects linking agsinst the library.

The macros for use in the library C++ sources are these, next to those also defined by GenerateExportHeader:

The macros used to control visibility when building against the library are:

When the GROUP_BASE_NAME has been used, the same macros but with the given <group_base_name> prefix are available to define the defaults of these macros, if not explicitly set.

WARNING:

Examples:

Preparing a library “Foo” created by target “foo”, which is part of a group of libraries “Bar”, where some API of “Foo” got deprecated at versions 5.0 & 5.12:

ecm_generate_export_header(foo


    GROUP_BASE_NAME BAR


    VERSION ${FOO_VERSION}


    DEPRECATION_VERSIONS 5.0 5.12
)

In the library “Foo” sources in the headers the API would be prepared like this, using the generated macros FOO_ENABLE_DEPRECATED_SINCE and FOO_DEPRECATED_VERSION:

#include <foo_export.h>
#if FOO_ENABLE_DEPRECATED_SINCE(5, 0)
/**


  * @deprecated Since 5.0


  */
FOO_EXPORT
FOO_DEPRECATED_VERSION(5, 0, "Use doFoo2()")
void doFoo();
#endif
#if FOO_ENABLE_DEPRECATED_SINCE(5, 12)
/**


  * @deprecated Since 5.12


  */
FOO_EXPORT
FOO_DEPRECATED_VERSION(5, 12, "Use doBar2()")
void doBar();
#endif

Projects linking against the “Foo” library can control which part of its deprecated API should be hidden to the compiler by adding a definition using the FOO_DISABLE_DEPRECATED_BEFORE_AND_AT macro variable set to the desired value (in version hex number notation):

add_definitions(-DFOO_DISABLE_DEPRECATED_BEFORE_AND_AT=0x050000)

Or using the macro variable of the group:

add_definitions(-DBAR_DISABLE_DEPRECATED_BEFORE_AND_AT=0x050000)

If both are specified, FOO_DISABLE_DEPRECATED_BEFORE_AND_AT will take precedence.

To build a variant of a library with some deprecated API completely left out from the build, not only optionally invisible to consumers, one uses the EXCLUDE_DEPRECATED_BEFORE_AND_AT parameter. This is best combined with a cached CMake variable.

set(EXCLUDE_DEPRECATED_BEFORE_AND_AT 0 CACHE STRING "Control the range of deprecated API excluded from the build [default=0].")
ecm_generate_export_header(foo


    VERSION ${FOO_VERSION}


    EXCLUDE_DEPRECATED_BEFORE_AND_AT ${EXCLUDE_DEPRECATED_BEFORE_AND_AT}


    DEPRECATION_VERSIONS 5.0 5.12
)

The macros used in the headers for library consumers are reused for disabling the API excluded in the build of the library. For disabling the implementation of that API as well as for disabling deprecated API which only can be disabled at build time of the library for BC reasons, one uses the generated macro FOO_BUILD_DEPRECATED_SINCE, like this:

#include <foo_export.h>
enum Bars {


    One,
#if FOO_BUILD_DEPRECATED_SINCE(5, 0)


    Two FOO_ENUMERATOR_DEPRECATED_VERSION(5, 0, "Use Three"), // macro available since 5.82
#endif


    Three,
};
#if FOO_ENABLE_DEPRECATED_SINCE(5, 0)
/**


  * @deprecated Since 5.0


  */
FOO_EXPORT
FOO_DEPRECATED_VERSION(5, 0, "Use doFoo2()")
void doFoo();
#endif
#if FOO_ENABLE_DEPRECATED_SINCE(5, 12)
/**


  * @deprecated Since 5.12


  */
FOO_EXPORT
FOO_DEPRECATED_VERSION(5, 12, "Use doBar2()")
void doBar();
#endif
class FOO_EXPORT Foo {
public:
#if FOO_BUILD_DEPRECATED_SINCE(5, 0)


    /**


      * @deprecated Since 5.0


      */


    FOO_DEPRECATED_VERSION(5, 0, "Feature removed")


    virtual void doWhat();
#endif
};

#if FOO_BUILD_DEPRECATED_SINCE(5, 0)
void doFoo()
{


    // [...]
}
#endif
#if FOO_BUILD_DEPRECATED_SINCE(5, 12)
void doBar()
{


    // [...]
}
#endif
#if FOO_BUILD_DEPRECATED_SINCE(5, 0)
void Foo::doWhat()
{


    // [...]
}
#endif

So e.g. if EXCLUDE_DEPRECATED_BEFORE_AND_AT is set to “5.0.0”, the enumerator Two as well as the methods ::doFoo() and Foo::doWhat() will be not available to library consumers. The methods will not have been compiled into the library binary, and the declarations will be hidden to the compiler, FOO_DISABLE_DEPRECATED_BEFORE_AND_AT also cannot be used to reactivate them.

When using the NO_DEFINITION_EXPORT_TO_BUILD_INTERFACE and the project for the “Foo” library includes also tests and examples linking against the library and using deprecated API (like tests covering it), one better explicitly sets FOO_DISABLE_DEPRECATED_BEFORE_AND_AT for those targets to the version before and at which all deprecated API has been excluded from the build. Even more when building against other libraries from the same group “Bar” and disabling some deprecated API of those libraries using the group macro BAR_DISABLE_DEPRECATED_BEFORE_AND_AT, which also works as default for FOO_DISABLE_DEPRECATED_BEFORE_AND_AT.

To get the hex number style value the helper macro ecm_export_header_format_version() will be used:

set(EXCLUDE_DEPRECATED_BEFORE_AND_AT 0 CACHE STRING "Control what part of deprecated API is excluded from build [default=0].")
ecm_generate_export_header(foo


    VERSION ${FOO_VERSION}


    GROUP_BASE_NAME BAR


    EXCLUDE_DEPRECATED_BEFORE_AND_AT ${EXCLUDE_DEPRECATED_BEFORE_AND_AT}


    NO_DEFINITION_EXPORT_TO_BUILD_INTERFACE


    DEPRECATION_VERSIONS 5.0 5.12
)
ecm_export_header_format_version(${EXCLUDE_DEPRECATED_BEFORE_AND_AT}


    CURRENT_VERSION ${FOO_VERSION}


    HEXNUMBER_VAR foo_no_deprecated_before_and_at
)
# disable all deprecated API up to 5.9.0 from all other libs of group "BAR" that we use ourselves
add_definitions(-DBAR_DISABLE_DEPRECATED_BEFORE_AND_AT=0x050900)
add_executable(app app.cpp)
target_link_libraries(app foo)
target_compile_definitions(app


     PRIVATE "FOO_DISABLE_DEPRECATED_BEFORE_AND_AT=${foo_no_deprecated_before_and_at}")

Since 5.64.0.

ECMGenerateHeaders¶

Generate C/C++ CamelCase forwarding headers.

ecm_generate_headers(<camelcase_forwarding_headers_var>


    HEADER_NAMES <CamelCaseName> [<CamelCaseName> [...]]


    [ORIGINAL <CAMELCASE|LOWERCASE>]


    [HEADER_EXTENSION <header_extension>]


    [OUTPUT_DIR <output_dir>]


    [PREFIX <prefix>]


    [REQUIRED_HEADERS <variable>]


    [COMMON_HEADER <HeaderName>]


    [RELATIVE <relative_path>])

For each CamelCase header name passed to HEADER_NAMES, a file of that name will be generated that will include a version with .h or, if set, .<header_extension> appended. For example, the generated header ClassA will include classa.h (or ClassA.h, see ORIGINAL). If a CamelCaseName consists of multiple comma-separated files, e.g. ClassA,ClassB,ClassC, then multiple camelcase header files will be generated which are redirects to the first header file. The file locations of these generated headers will be stored in <camelcase_forwarding_headers_var>.

ORIGINAL specifies how the name of the original header is written: lowercased or also camelcased. The default is “LOWERCASE”. Since 1.8.0.

HEADER_EXTENSION specifies what file name extension is used for the header files. The default is “h”. Since 5.48.0.

PREFIX places the generated headers in subdirectories. This should be a CamelCase name like KParts, which will cause the CamelCase forwarding headers to be placed in the KParts directory (e.g. KParts/Part). It will also, for the convenience of code in the source distribution, generate forwarding headers based on the original names (e.g. kparts/part.h). This allows includes like "#include <kparts/part.h>" to be used before installation, as long as the include_directories are set appropriately.

OUTPUT_DIR specifies where the files will be generated; this should be within the build directory. By default, ${CMAKE_CURRENT_BINARY_DIR} will be used. This option can be used to avoid file conflicts.

REQUIRED_HEADERS specifies an output variable name where all the required headers will be appended so that they can be installed together with the generated ones. This is mostly intended as a convenience so that adding a new header to a project only requires specifying the CamelCase variant in the CMakeLists.txt file; the original variant will then be added to this variable.

COMMON_HEADER generates an additional convenience header which includes all other header files.

The RELATIVE argument indicates where the original headers can be found relative to CMAKE_CURRENT_SOURCE_DIR. It does not affect the generated CamelCase forwarding files, but ecm_generate_headers() uses it when checking that the original header exists, and to generate originally named forwarding headers when PREFIX is set.

To allow other parts of the source distribution (eg: tests) to use the generated headers before installation, it may be desirable to set the INCLUDE_DIRECTORIES property for the library target to output_dir. For example, if OUTPUT_DIR is CMAKE_CURRENT_BINARY_DIR (the default), you could do

target_include_directories(MyLib PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>")

Example usage (without PREFIX):

ecm_generate_headers(


    MyLib_FORWARDING_HEADERS


    HEADERS


        MLFoo


        MLBar


        # etc


    REQUIRED_HEADERS MyLib_HEADERS


    COMMON_HEADER MLGeneral
)
install(FILES ${MyLib_FORWARDING_HEADERS} ${MyLib_HEADERS}


        DESTINATION ${CMAKE_INSTALL_PREFIX}/include


        COMPONENT Devel)

Example usage (with PREFIX):

ecm_generate_headers(


    MyLib_FORWARDING_HEADERS


    HEADERS


        Foo


        # several classes are contained in bar.h, so generate


        # additional files


        Bar,BarList


        # etc


    PREFIX MyLib


    REQUIRED_HEADERS MyLib_HEADERS
)
install(FILES ${MyLib_FORWARDING_HEADERS}


        DESTINATION ${CMAKE_INSTALL_PREFIX}/include/MyLib


        COMPONENT Devel)
install(FILES ${MyLib_HEADERS}


        DESTINATION ${CMAKE_INSTALL_PREFIX}/include/mylib


        COMPONENT Devel)

Since pre-1.0.0.

ECMGeneratePkgConfigFile¶

Generate a pkg-config file for the benefit of autotools-based projects.

ecm_generate_pkgconfig_file(BASE_NAME <baseName>


                      [LIB_NAME <libName>]


                      [DEPS [PRIVATE|PUBLIC] <dep> [[PRIVATE|PUBLIC] <dep> [...]]]


                      [FILENAME_VAR <filename_variable>]


                      [INCLUDE_INSTALL_DIR <dir>]


                      [LIB_INSTALL_DIR <dir>]


                      [DEFINES -D<variable=value>...]


                      [DESCRIPTION <library description>] # since 5.41.0


                      [URL <url>] # since 5.89.0


                      [INSTALL])

BASE_NAME is the name of the module. It’s the name projects will use to find the module.

LIB_NAME is the name of the library that is being exported. If undefined, it will default to the BASE_NAME. That means the LIB_NAME will be set as the name field as well as the library to link to.

DEPS is the list of libraries required by this library. Libraries that are not exposed to applications should be marked with PRIVATE. The default is PUBLIC, but note that according to the Guide to pkg-config marking dependencies as private is usually preferred. The PUBLIC and PRIVATE keywords are supported since 5.89.0.

FILENAME_VAR is specified with a variable name. This variable will receive the location of the generated file will be set, within the build directory. This way it can be used in case some processing is required. See also INSTALL.

INCLUDE_INSTALL_DIR specifies where the includes will be installed. If it’s not specified, it will default to INSTALL_INCLUDEDIR, CMAKE_INSTALL_INCLUDEDIR or just “include/” in case they are specified, with the BASE_NAME postfixed.

LIB_INSTALL_DIR specifies where the library is being installed. If it’s not specified, it will default to LIB_INSTALL_DIR, CMAKE_INSTALL_LIBDIR or just “lib/” in case they are specified.

DEFINES is a list of preprocessor defines that it is recommended users of the library pass to the compiler when using it.

DESCRIPTION describes what this library is. If it’s not specified, CMake will first try to get the description from the metainfo.yaml file or will create one based on LIB_NAME. Since 5.41.0.

URL An URL where people can get more information about and download the package. Defaults to “https://www.kde.org/”. Since 5.89.0.

INSTALL will cause the module to be installed to the pkgconfig subdirectory of LIB_INSTALL_DIR, unless the ECM_PKGCONFIG_INSTALL_DIR cache variable is set to something different.

NOTE:

To properly use this macro a version needs to be set. To retrieve it, ECM_PKGCONFIG_INSTALL_DIR uses PROJECT_VERSION. To set it, use the project() command or the ecm_setup_version() macro

Example usage:

ecm_generate_pkgconfig_file(


    BASE_NAME KF5Archive


    DEPS Qt5Core


    FILENAME_VAR pkgconfig_filename


    INSTALL
)

Since 1.3.0.

ECMGeneratePriFile¶

Generate a .pri file for the benefit of qmake-based projects.

As well as the function below, this module creates the cache variable ECM_MKSPECS_INSTALL_DIR and sets the default value to mkspecs/modules. This assumes Qt and the current project are both installed to the same non-system prefix. Packagers who use -DCMAKE_INSTALL_PREFIX=/usr will certainly want to set ECM_MKSPECS_INSTALL_DIR to something like share/qt5/mkspecs/modules.

The main thing is that this should be the modules subdirectory of either the default qmake mkspecs directory or of a directory that will be in the $QMAKEPATH environment variable when qmake is run.

ecm_generate_pri_file(BASE_NAME <baseName>


                      LIB_NAME <libName>


                      [VERSION <version>] # since 5.83


                      [DEPS "<dep> [<dep> [...]]"]


                      [FILENAME_VAR <filename_variable>]


                      [INCLUDE_INSTALL_DIRS <dir> [<dir> [...]]]  # since 5.92


                      [INCLUDE_INSTALL_DIR <dir>] # deprecated since 5.92


                      [LIB_INSTALL_DIR <dir>])

If your CMake project produces a Qt-based library, you may expect there to be applications that wish to use it that use a qmake-based build system, rather than a CMake-based one. Creating a .pri file will make use of your library convenient for them, in much the same way that CMake config files make things convenient for CMake-based applications. ecm_generate_pri_file() generates just such a file.

VERSION specifies the version of the library the .pri file describes. If not set, the value is taken from the context variable PROJECT_VERSION. This variable is usually set by the project(... VERSION ...) command or, if CMake policy CMP0048 is not NEW, by ECMSetupVersion. For backward-compatibility with older ECM versions the PROJECT_VERSION_STRING variable as set by ECMSetupVersion will be preferred over PROJECT_VERSION if set, unless the minimum required version of ECM is 5.83 and newer. Since 5.83.

BASE_NAME specifies the name qmake project (.pro) files should use to refer to the library (eg: KArchive). LIB_NAME is the name of the actual library to link to (ie: the first argument to add_library()). DEPS is a space-separated list of the base names of other libraries (for Qt libraries, use the same names you use with the QT variable in a qmake project file, such as “core” for QtCore). FILENAME_VAR specifies the name of a variable to store the path to the generated file in.

INCLUDE_INSTALL_DIRS are the paths (relative to CMAKE_INSTALL_PREFIX) that include files will be installed to. It defaults to ${INCLUDE_INSTALL_DIR}/<baseName> if the INCLUDE_INSTALL_DIR variable is set. If that variable is not set, the CMAKE_INSTALL_INCLUDEDIR variable is used instead, and if neither are set include is used. LIB_INSTALL_DIR operates similarly for the installation location for libraries; it defaults to ${LIB_INSTALL_DIR}, ${CMAKE_INSTALL_LIBDIR} or lib, in that order.

INCLUDE_INSTALL_DIR is the old variant of INCLUDE_INSTALL_DIRS, taking only one directory.

Example usage:

ecm_generate_pri_file(


    BASE_NAME KArchive


    LIB_NAME KF5KArchive


    DEPS "core"


    FILENAME_VAR pri_filename


    VERSION 4.2.0
)
install(FILES ${pri_filename} DESTINATION ${ECM_MKSPECS_INSTALL_DIR})

A qmake-based project that wished to use this would then do:

QT += KArchive

in their .pro file.

Since pre-1.0.0.

ECMGenerateQmlTypes¶

Generates plugins.qmltypes files for QML plugins.

ecm_generate_qmltypes(<org.kde.pluginname> 1.3


                      DESTINATION <${KDE_INSTALL_QMLDIR}/org/kde/pluginname>)

Makes it possible to generate plugins.qmltypes files for the QML plugins that our project offers. These files offer introspection upon our plugin and are useful for integrating with IDE language support of our plugin. It offers information about the objects its methods and their argument types.

The developer will be in charge of making sure that these files are up to date. The plugin.qmltypes file will sit in the source directory. This function will include the code that installs the file in the right place and a small unit test named qmltypes-pluginname-version that makes sure that it doesn’t need updating.

Since 5.33.0

ECMInstallIcons¶

Installs icons, sorting them into the correct directories according to the FreeDesktop.org icon naming specification.

ecm_install_icons(ICONS <icon> [<icon> [...]]


                  DESTINATION <icon_install_dir>


                  [LANG <l10n_code>]


                  [THEME <theme>])

The given icons, whose names must match the pattern:

<size>-<group>-<name>.<ext>

will be installed to the appropriate subdirectory of DESTINATION according to the FreeDesktop.org icon naming scheme. By default, they are installed to the “hicolor” theme, but this can be changed using the THEME argument. If the icons are localized, the LANG argument can be used to install them in a locale-specific directory.

<size> is a numeric pixel size (typically 16, 22, 32, 48, 64, 128 or 256) or sc for scalable (SVG) files, <group> is one of the standard FreeDesktop.org icon groups (actions, animations, apps, categories, devices, emblems, emotes, intl, mimetypes, places, status) and <ext> is one of .png, .mng or .svgz.

The typical installation directory is share/icons.

ecm_install_icons(ICONS 22-actions-menu_new.png


                  DESTINATION share/icons)

The above code will install the file 22-actions-menu_new.png as ${CMAKE_INSTALL_PREFIX}/share/icons/<theme>/22x22/actions/menu_new.png

Users of the KDEInstallDirs module would normally use ${KDE_INSTALL_ICONDIR} as the DESTINATION, while users of the GNUInstallDirs module should use ${CMAKE_INSTALL_DATAROOTDIR}/icons.

An old form of arguments will also be accepted:

ecm_install_icons(<icon_install_dir> [<l10n_code>])

This matches files named like:

<theme><size>-<group>-<name>.<ext>

where <theme> is one of

With this syntax, the file hi22-actions-menu_new.png would be installed into <icon_install_dir>/hicolor/22x22/actions/menu_new.png

Since pre-1.0.0.

ECMMarkAsTest¶

Marks a target as only being required for tests.

ecm_mark_as_test(<target1> [<target2> [...]])

This will cause the specified targets to not be built unless either BUILD_TESTING is set to ON or the user invokes the buildtests target.

BUILD_TESTING is created as a cache variable by the CTest module and by the KDECMakeSettings module.

Since pre-1.0.0.

ECMMarkNonGuiExecutable¶

Marks an executable target as not being a GUI application.

ecm_mark_nongui_executable(<target1> [<target2> [...]])

This will indicate to CMake that the specified targets should not be included in a MACOSX_BUNDLE and should not be WIN32_EXECUTABLEs. On platforms other than MacOS X or Windows, this will have no effect.

Since pre-1.0.0.

ECMOptionalAddSubdirectory¶

Make subdirectories optional.

ecm_optional_add_subdirectory(<dir>)

This behaves like add_subdirectory(), except that it does not complain if the directory does not exist. Additionally, if the directory does exist, it creates an option to allow the user to skip it. The option will be named BUILD_<dir>.

This is useful for “meta-projects” that combine several mostly-independent sub-projects.

If the CMake variable DISABLE_ALL_OPTIONAL_SUBDIRECTORIES is set to TRUE for the first CMake run on the project, all optional subdirectories will be disabled by default (but can of course be enabled via the respective options). For example, the following will disable all optional subdirectories except the one named “foo”:

cmake -DDISABLE_ALL_OPTIONAL_SUBDIRECTORIES=TRUE -DBUILD_foo=TRUE myproject

Since pre-1.0.0.

ECMPackageConfigHelpers¶

Helper macros for generating CMake package config files.

write_basic_package_version_file() is the same as the one provided by the CMakePackageConfigHelpers module in CMake; see that module’s documentation for more information.

ecm_configure_package_config_file(<input> <output>


    INSTALL_DESTINATION <path>


    [PATH_VARS <var1> [<var2> [...]]


    [NO_SET_AND_CHECK_MACRO]


    [NO_CHECK_REQUIRED_COMPONENTS_MACRO])

This behaves in the same way as configure_package_config_file() from CMake 2.8.12, except that it adds an extra helper macro: find_dependency(). It is highly recommended that you read the documentation for CMakePackageConfigHelpers for more information, particularly with regard to the PATH_VARS argument.

Note that there is no argument that will disable the find_dependency() macro; if you do not require this macro, you should use configure_package_config_file from the CMakePackageConfigHelpers module.

CMake 3.0 includes a CMakeFindDependencyMacro module that provides the find_dependency() macro (which you can include() in your package config file), so this file is only useful for projects wishing to provide config files that will work with CMake 2.8.12.

Additional Config File Macros¶

find_dependency(<dep> [<version> [EXACT]])

find_dependency() should be used instead of find_package() to find package dependencies. It forwards the correct parameters for EXACT, QUIET and REQUIRED which were passed to the original find_package() call. It also sets an informative diagnostic message if the dependency could not be found.

Since pre-1.0.0.

ECMPoQmTools¶

This module provides the ecm_process_po_files_as_qm and ecm_install_po_files_as_qm functions for generating QTranslator (.qm) catalogs from Gettext (.po) catalogs, and the ecm_create_qm_loader function for generating the necessary code to load them in a Qt application or library.

ecm_process_po_files_as_qm(<lang> [ALL]


                           [INSTALL_DESTINATION <install_destination>]


                           PO_FILES <pofile> [<pofile> [...]])

Compile .po files into .qm files for the given language.

If INSTALL_DESTINATION is given, the .qm files are installed in <install_destination>/<lang>/LC_MESSAGES. Typically, <install_destination> is set to share/locale.

ecm_process_po_files_as_qm creates a “translations” target. This target builds all .po files into .qm files. If ALL is specified, these rules are added to the “all” target (and so the .qm files will be built by default).

ecm_create_qm_loader(<sources_var_name(|target (since 5.83))> <catalog_name>)

Generates C++ code which ensures translations are automatically loaded at startup. The generated files are appended to the variable named <sources_var_name> or, if the first argument is a target (since 5.83), to the SOURCES property of <target>. Any target must be created with add_executable() or add_library() and not be an alias.

It assumes that the .qm file for the language code <lang> is installed as <sharedir>/locale/<lang>/LC_MESSAGES/<catalog_name>.qm, where <sharedir> is one of the directories given by the GenericDataLocation of QStandardPaths.

Typical usage is like:

set(mylib_SRCS foo.cpp bar.cpp)
ecm_create_qm_loader(mylib_SRCS mycatalog)
add_library(mylib ${mylib_SRCS})
# Or, since 5.83:
add_library(mylib foo.cpp bar.cpp)
ecm_create_qm_loader(mylib mycatalog)

ecm_install_po_files_as_qm(<podir>)

Searches for .po files and installs them to the standard location.

This is a convenience function which relies on all .po files being kept in <podir>/<lang>/, where <lang> is the language the .po files are written in.

For example, given the following directory structure:

po/


  fr/


    mylib.po

ecm_install_po_files_as_qm(po) compiles mylib.po into mylib.qm and installs it in <install_destination>/fr/LC_MESSAGES. <install_destination> defaults to ${LOCALE_INSTALL_DIR} if defined, otherwise it uses ${CMAKE_INSTALL_LOCALEDIR} if that is defined, otherwise it uses share/locale.

Since pre-1.0.0.

ECMQmlModule¶

This file contains helper functions to make it easier to create QML modules. It takes care of a number of things that often need to be repeated. It also takes care of special handling of QML modules between shared and static builds. When building a static version of a QML module, the relevant QML source files are bundled into the static library. When using a shared build, the QML plugin and relevant QML files are copied to the target’s RUNTIME_OUTPUT_DIRECTORY to make it easier to run things directly from the build directory.

Example usage:

ecm_add_qml_module(ExampleModule URI "org.example.Example" VERSION 1.4)
target_sources(ExampleModule PRIVATE ExamplePlugin.cpp)
target_link_libraries(ExampleModule PRIVATE Qt::Quick)
ecm_target_qml_sources(ExampleModule SOURCES ExampleItem.qml)
ecm_target_qml_sources(ExampleModule SOURCES AnotherExampleItem.qml VERSION 1.5)
ecm_finalize_qml_module(ExampleModule DESTINATION ${KDE_INSTALL_QMLDIR})

ecm_add_qml_module(<target name> URI <module uri> [VERSION <module version>] [NO_PLUGIN] [CLASSNAME <class name>])

This will declare a new CMake target called <target name>. The URI argument is required and should be a proper QML module URI. The URI is used, among others, to generate a subdirectory where the module will be installed to.

If the VERSION argument is specified, it is used to initialize the default version that is used by ecm_target_qml_sources when adding QML files. If it is not specified, a default of 1.0 is used. Additionally, if a version greater than or equal to 2.0 is specified, the major version is appended to the installation path of the module.

If the option NO_PLUGIN is set, a target is declared that is not expected to contain any C++ QML plugin.

If the optional CLASSNAME argument is supplied, it will be used as class name in the generated QMLDIR file. If it is not specified, the target name will be used instead.

You can add C++ and QML source files to the target using target_sources and ecm_target_qml_sources, respectively.

Since 5.91.0

ecm_add_qml_module_dependencies(<target> DEPENDS <module string> [<module string> ...])

Add the list of dependencies specified by the DEPENDS argument to be listed as dependencies in the generated QMLDIR file of <target>.

Since 5.91.0

ecm_target_qml_sources(<target> SOURCES <source.qml> [<source.qml> ...] [VERSION <version>] [PATH <path>] [PRIVATE])

Add the list of QML files specified by the SOURCES argument as source files to the QML module target <target>.

If the optional VERSION argument is specified, all QML files will be added with the specified version. If it is not specified, they will use the version of the QML module target.

If the optional PRIVATE argument is specified, the QML files will be included in the target but not in the generated qmldir file. Any version argument will be ignored.

The optional PATH argument declares a subdirectory of the module where the files should be copied to. By default, files will be copied to the module root.

This function will fail if <target> is not a QML module target or any of the specified files do not exist.

Since 5.91.0

ecm_finalize_qml_module(<target> DESTINATION <QML install destination>)

Finalize the specified QML module target. This must be called after all other setup (like adding sources) on the target has been done. It will perform a number of tasks:

This function will fail if <target> is not a QML module target.

Since 5.91.0

ECMQtDeclareLoggingCategory¶

This module provides the ecm_qt_declare_logging_category function for generating declarations for logging categories in Qt5, and the ecm_qt_install_logging_categories function for generating and installing a file in KDebugSettings format with the info about all those categories, as well as a file with info about any renamed categories if defined. To include in that file any logging categories that are manually defined also a function ecm_qt_export_logging_category is provided.

ecm_qt_declare_logging_category(<sources_var_name(|target (since 5.80))>


    HEADER <filename>


    IDENTIFIER <identifier>


    CATEGORY_NAME <category_name>


    [OLD_CATEGORY_NAMES <oldest_cat_name> [<second_oldest_cat_name> [...]]]


    [DEFAULT_SEVERITY <Debug|Info|Warning|Critical|Fatal>]


    [EXPORT <exportid>]


    [DESCRIPTION <description>]
)

A header file, <filename>, will be generated along with a corresponding source file. These will provide a QLoggingCategory category that can be referred to from C++ code using <identifier>, and from the logging configuration using <category_name>.

The generated source file will be added to the variable with the name <sources_var_name>. If the given argument is a target though, instead both the generated header file and the generated source file will be added to the target as private sources (since 5.80). The target must not be an alias.

If <filename> is not absolute, it will be taken relative to the current binary directory.

<identifier> may include namespaces (eg: foo::bar::IDENT).

If EXPORT is passed, the category will be registered for the group id <exportid>. Info about the categories of that group can then be generated in a file and installed by that group id with the ecm_qt_install_logging_categories function. In that case also DESCRIPTION will need to be passed, with <description> being a short single line text. And OLD_CATEGORY_NAMES can be used to inform about any renamings of the category, so user settings can be migrated. Since 5.68.0.

Since 5.14.0.

ecm_qt_export_logging_category(


    IDENTIFIER <identifier>


    CATEGORY_NAME <category_name>


    [OLD_CATEGORY_NAMES <oldest_category_name> [<second_oldest_category_name> [...]]]


    EXPORT <exportid>


    DESCRIPTION <description>


    [DEFAULT_SEVERITY <Debug|Info|Warning|Critical|Fatal>]
)

Registers a logging category for being included in the generated and installed KDebugSettings files. To be used for categories who are declared by manual code or other ways instead of code generated with ecm_qt_declare_logging_category.

<identifier> may include namespaces (eg: foo::bar::IDENT).

EXPORT specifies the group id with which the category will be registered. Info about the categories of that group can then be generated in a file and installed by that group id with the ecm_qt_install_logging_categories function.

DESCRIPTION specifies a short single line text describing the category.

OLD_CATEGORY_NAMES can be used to inform about any renamings of the category, so user settings can be migrated.

Since 5.68.0.

ecm_qt_install_logging_categories(


    EXPORT <exportid>


    [FILE <filename>]


    DESTINATION <install_path>


    [SORT]


    [COMPONENT <component>]
)

Generates and installs a file in KDebugSettings format with the info about all the categories registered for the group <exportid>, as well as a file with info about any renamed categories, if there are.

The method call needs to be after the last ecm_qt_declare_logging_category call which uses the same <exportid>. This can be in the same directory, or any subdirectory or parent directory.

EXPORT specifies the group id of categories whose information should be stored in the file generated and installed.

FILE specifies the name of the file generated and installed. It will default to lower-cased <exportid>.categories.

DESTINATION specifies where the generated file will be installed.

IF SORT is set, entries will be sorted by identifiers.

COMPONENT specifies the installation component name with which the install rules for the generated file are associated.

Since 5.85.0 this is a no-op when building for Android, as KDebugSettings is not available on that platform and the logging category files therefore just bloat the APK.

Example usage:

ecm_qt_declare_logging_category(


    MYPROJECT_SRCS


    HEADER "myproject_debug.h"


    IDENTIFIER "MYPROJECT_DEBUG"


    CATEGORY_NAME "myproject"


    OLD_CATEGORY_NAMES "myprojectlog"


    DESCRIPTION "My project"


    EXPORT MyProject
)
ecm_qt_export_logging_category(


    IDENTIFIER "MYPROJECT_SUBMODULE_DEBUG"


    CATEGORY_NAME "myproject.submodule"


    DESCRIPTION "My project - submodule"


    EXPORT MyProject
)
ecm_qt_install_logging_categories(


    EXPORT MyProject


    FILE myproject.categories


    DESTINATION "${KDE_INSTALL_LOGGINGCATEGORIESDIR}"
)

Since 5.68.0.

ECMQueryQt¶

This module can be used to query the installation paths used by Qt.

For Qt5 this uses qmake, and for Qt6 this used qtpaths (the latter has built-in support to query the paths of a target platform when cross-compiling).

This module defines the following function:

ecm_query_qt(<result_variable> <qt_variable> [TRY])

Passing TRY will result in the method not making the build fail if the executable used for querying has not been found, but instead simply print a warning message and return an empty string.

Example usage:

include(ECMQueryQt)
ecm_query_qt(bin_dir QT_INSTALL_BINS)

If the call succeeds ${bin_dir} will be set to <prefix>/path/to/bin/dir (e.g. /usr/lib64/qt/bin/).

Since: 5.93

ECMSetupQtPluginMacroNames¶

Instruct CMake’s automoc about C++ preprocessor macros used to define Qt-style plugins.

ecm_setup_qtplugin_macro_names(


    [JSON_NONE <macro_name> [<macro_name> [...]]]


    [JSON_ARG1 <macro_name> [<macro_name> [...]]]


    [JSON_ARG2 <macro_name> [<macro_name> [...]]]


    [JSON_ARG3 <macro_name> [<macro_name> [...]]]


    [CONFIG_CODE_VARIABLE <variable_name>] )

CMake’s automoc needs some support when parsing C++ source files to detect whether moc should be run on those files and if there are also dependencies on other files, like those with Qt plugin metadata in JSON format. Because automoc just greps overs the raw plain text of the sources without any C++ preprocessor-like processing. CMake in newer versions provides the variables CMAKE_AUTOMOC_DEPEND_FILTERS (CMake >= 3.9.0) and CMAKE_AUTOMOC_MACRO_NAMES (CMake >= 3.10) to allow the developer to assist automoc.

This macro cares for the explicit setup needed for those variables for common cases of C++ preprocessor macros used for Qt-style plugins.

JSON_NONE lists the names of C++ preprocessor macros for Qt-style plugins which do not refer to external files with the plugin metadata.

JSON_ARG1 lists the names of C++ preprocessor macros for Qt-style plugins where the first argument to the macro is the name of the external file with the plugin metadata.

JSON_ARG2 is the same as JSON_ARG1 but with the file name being the second argument.

JSON_ARG3 is the same as JSON_ARG1 but with the file name being the third argument.

CONFIG_CODE_VARIABLE specifies the name of the variable which will get set as value some generated CMake code for instructing automoc for the given macro names, as useful in an installed CMake config file. The variable can then be used as usual in the template file for such a CMake config file, by @<variable_name>@.

Example usage:

Given some plugin-oriented Qt-based software which defines a custom C++ preprocessor macro EXPORT_MYPLUGIN for declaring the central plugin object:

#define EXPORT_MYPLUGIN_WITH_JSON(classname, jsonFile) \
class classname : public QObject \
{ \


    Q_OBJECT \


    Q_PLUGIN_METADATA(IID "myplugin" FILE jsonFile) \


    explicit classname() {} \
};

In the CMake buildsystem of the library one calls

ecm_setup_qtplugin_macro_names(


    JSON_ARG2


       EXPORT_MYPLUGIN_WITH_JSON
)

to instruct automoc about the usage of that macro in the sources of the library itself.

Given the software installs a library including the header with the macro definition and a CMake config file, so 3rd-party can create additional plugins by linking against the library, one passes additionally the name of a variable which shall be set as value the CMake code needed to instruct automoc about the usage of that macro.

ecm_setup_qtplugin_macro_names(


    JSON_ARG2


       EXPORT_MYPLUGIN_WITH_JSON


    CONFIG_CODE_VARIABLE


       PACKAGE_SETUP_AUTOMOC_VARIABLES
)

This variable then is used in the template file (e.g. MyProjectConfig.cmake.in) for the libary’s installed CMake config file and that way will ensure that in the 3rd-party plugin’s buildsystem automoc is instructed as well as needed:

@PACKAGE_SETUP_AUTOMOC_VARIABLES@

Since 5.45.0.

ECMSetupVersion¶

Handle library version information.

ecm_setup_version(<version>


                  VARIABLE_PREFIX <prefix>


                  [SOVERSION <soversion>]


                  [VERSION_HEADER <filename>]


                  [PACKAGE_VERSION_FILE <filename> [COMPATIBILITY <compat>]] )

This parses a version string and sets up a standard set of version variables. It can optionally also create a C version header file and a CMake package version file to install along with the library.

If the <version> argument is of the form <major>.<minor>.<patch> (or <major>.<minor>.<patch>.<tweak>), The following CMake variables are set:

<prefix>_VERSION_MAJOR  - <major>
<prefix>_VERSION_MINOR  - <minor>
<prefix>_VERSION_PATCH  - <patch>
<prefix>_VERSION        - <version>
<prefix>_SOVERSION      - <soversion>, or <major> if SOVERSION was not given

For backward-compatibility also this variable is set (only if the minimum required version of ECM is < 5.83):

<prefix>_VERSION_STRING - <version> (use <prefix>_VERSION instead)

If CMake policy CMP0048 is not NEW, the following CMake variables will also be set:

PROJECT_VERSION_MAJOR   - <major>
PROJECT_VERSION_MINOR   - <minor>
PROJECT_VERSION_PATCH   - <patch>
PROJECT_VERSION         - <version>

For backward-compatibility, if CMake policy CMP0048 is not NEW, also this variable is set (only if the minimum required version of ECM is < 5.83):

PROJECT_VERSION_STRING  - <version> (use PROJECT_VERSION instead)

If the VERSION_HEADER option is used, a simple C header is generated with the given filename. If filename is a relative path, it is interpreted as relative to CMAKE_CURRENT_BINARY_DIR. The generated header contains the following macros:

<prefix>_VERSION_MAJOR  - <major> as an integer
<prefix>_VERSION_MINOR  - <minor> as an integer
<prefix>_VERSION_PATCH  - <patch> as an integer
<prefix>_VERSION_STRING - <version> as a C string
<prefix>_VERSION        - the version as an integer

<prefix>_VERSION has <patch> in the bottom 8 bits, <minor> in the next 8 bits and <major> in the remaining bits. Note that <patch> and <minor> must be less than 256.

If the PACKAGE_VERSION_FILE option is used, a simple CMake package version file is created using the write_basic_package_version_file() macro provided by CMake. It should be installed in the same location as the Config.cmake file of the library so that it can be found by find_package(). If the filename is a relative path, it is interpreted as relative to CMAKE_CURRENT_BINARY_DIR. The optional COMPATIBILITY option is forwarded to write_basic_package_version_file(), and defaults to AnyNewerVersion.

If CMake policy CMP0048 is NEW, an alternative form of the command is available:

ecm_setup_version(PROJECT


                  [VARIABLE_PREFIX <prefix>]


                  [SOVERSION <soversion>]


                  [VERSION_HEADER <filename>]


                  [PACKAGE_VERSION_FILE <filename>] )

This will use the version information set by the project() command. VARIABLE_PREFIX defaults to the project name. Note that PROJECT must be the first argument. In all other respects, it behaves like the other form of the command.

Since pre-1.0.0.

COMPATIBILITY option available since 1.6.0.

ECMSourceVersionControl¶

Tries to determine whether the source is under version control (git clone, svn checkout, etc).

ECM_SOURCE_UNDER_VERSION_CONTROL is set when indication is found that CMAKE_SOURCE_DIR is under version control.

Since 5.63

ECMUninstallTarget¶

Add an uninstall target.

By including this module, an uninstall target will be added to your CMake project. This will remove all files installed (or updated) by a previous invocation of the install target. It will not remove files created or modified by an install(SCRIPT) or install(CODE) command; you should create a custom uninstallation target for these and use add_dependency to make the uninstall target depend on it:

include(ECMUninstallTarget)
install(SCRIPT install-foo.cmake)
add_custom_target(uninstall_foo COMMAND ${CMAKE_COMMAND} -P uninstall-foo.cmake)
add_dependency(uninstall uninstall_foo)

The target will fail if the install target has not yet been run (so it is not possible to run CMake on the project and then immediately run the uninstall target).

WARNING:

Since 1.7.0.

ECMUseFindModules¶

Selectively use some of the find modules provided by extra-cmake-modules.

This module is automatically available once extra-cmake-modules has been found, so it is not necessary to include(ECMUseFindModules) explicitly.

ecm_use_find_modules(DIR <dir>


                     MODULES module1.cmake [module2.cmake [...]]


                     [NO_OVERRIDE])

This allows selective use of the find modules provided by ECM, including deferring to CMake’s versions of those modules if it has them. Rather than adding ${ECM_FIND_MODULE_DIR} to CMAKE_MODULE_PATH, you use ecm_use_find_modules() to copy the modules you want to a local (build) directory, and add that to CMAKE_MODULE_PATH.

The find modules given to MODULES will be copied to the directory given by DIR (which should be located in ${CMAKE_BINARY_DIR} and added to CMAKE_MODULE_PATH). If NO_OVERRIDE is given, only modules not also provided by CMake will be copied.

Example:

find_package(ECM REQUIRED)
ecm_use_find_modules(


    DIR ${CMAKE_BINARY_DIR}/cmake


    MODULES FindEGL.cmake


    NO_OVERRIDE
)
set(CMAKE_MODULE_PATH ${CMAKE_BINARY_DIR}/cmake)

This example will make FindEGL.cmake available in your project, but only as long as it is not yet part of CMake. Calls to find_package(EGL) will then make use of this copied module (or the CMake module if it exists).

Another possible use for this macro is to take copies of find modules that can be installed along with config files if they are required as a dependency (for example, if targets provided by the find module are in the link interface of a library).

Since pre-1.0.0.

ECMWinResolveSymlinks¶

Resolve pseudo-symlinks created by git when cloning on Windows.

ecm_win_resolve_symlinks(<dir>)

When git checks out a repository with UNIX symlinks on Windows machine, it creates a text file for each symlink, containing a relative path to the real file. This function would recursively walk over specified directory and replace pseudo-symlinks with corresponding real file’s contents. It would then run git update-index --assume-unchanged on them to trick git.

This is useful for projects like “breeze-icons” that contain many identical icons implemented as symlinks.

Since 5.28

QtVersionOption¶

Adds a build option to select the major Qt version if necessary, that is, if the major Qt version has not yet been determined otherwise (e.g. by a corresponding find_package() call). This module is typically included by other modules requiring knowledge about the major Qt version.

QT_MAJOR_VERSION is defined to either be “5” or “6”.

Since 5.82.0.