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    Port all usages of check_prototype_exists() to check_prototype_definition(), defined in CheckPrototypeDefinition.cmake, coming with CMake since 2.8.5.


    We use the version from CMake now, which is named FindFLEX.cmake (different casing !). Beside that there should be no changes in behaviour.

    • find_package(Flex) -> find_package(FLEX)


    We use the version from CMake now. The syntax of GETTEXT_PROCESS_PO_FILES() changed a bit, it now needs the additional keyword "PO_FILES.

    • gettext_process_po_files(de ALL INSTALL_DESTINATION ${dest} file1.po file2.po) -> gettext_process_po_files(de ALL INSTALL_DESTINATION ${dest} PO_FILES file1.po file2.po)

    The syntax of GETTEXT_PROCESS_POT() changed a bit, it now needs the additional keyword "LANGUAGES".

    • GETTEXT_PROCESS_POT( <potfile> [ALL] [INSTALL_DESTINATION <destdir>] <lang1> <lang2> ... ) -> GETTEXT_PROCESS_POT( <potfile> [ALL] [INSTALL_DESTINATION <destdir>] LANGUAGES <lang1> <lang2> ... )


    We use the version from CMake now. There is a minor difference, which will not affect many systems. The KDE version accepted only giflib version 4, while the CMake version accepted any version of giflib. If giflib version 4 .x is required, the version can now be specified:

    • find_package(GIF) -> find_package(GIF 4 )

    This actually only was an issue on some relatively old Sun machines in 2006. Maybe today it is not even there a problem anymore.


    We use the version from CMake 2.8.7 now. There are two changes compared to the one in kdelibs:

    • WinCE is probably not supported anymore, patches are welcome


    This file does not exist anymore, use GETTEXT_MSGFMT_EXECUTABLE from #FindGettext.cmake coming with CMake instead.


    The variable names have changed:



    This file does not exist anymore, use FindRuby.cmake coming with CMake instead. Most variables are the same. Below are the changes:

    • find_package(RUBY) -> find_package(Ruby)


    The following two variables have been removed, use the newer ones instead:

    • X11_Xss_FOUND -> X11_Xscreensaver_FOUND
    • X11_Xss_LIB -> X11_Xscreensaver_LIB

    The following libraries are now not part of X11_LIBRARIES anymore, so they may have to be added to target_link_libraries() explicitely where needed:

    • X11_Xau_LIB
    • X11_Xft_LIB
    • X11_Xdmcp_LIB
    • X11_Xpm_LIB


    This file has been removed. Use set_property(.. APPEND_STRING) instead (new in CMake 2.8.6).

    • include(MacroAddCompileFlags) -> delete
    • macro_add_compile_flags(target "-O2 -g") -> set_property(TARGET target APPEND_STRING PROPERTY COMPILE_FLAGS " -O2 -g")


    This file has been removed. Use set_property(.. APPEND_STRING) instead (new in CMake 2.8.6).

    • include(MacroAddLinkFlags) -> delete
    • macro_add_link_flags(target "-no-rpath") -> set_property(TARGET target APPEND_STRING PROPERTY LINK_FLAGS " -no-rpath")


    This file has been removed. Use set_property(... APPEND ...) instead.

    • include(MacroAdditionalCleanFiles) -> delete
    • macro_additional_clean_files(file1 file2 fileN) -> set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "file1;file2;fileN" )


    This file has been removed and then those macros:

    • normalize_version (requested_version normalized_version)
    • macro_check_range_inclusive_lower (lower_limit value upper_limit ok)
    • macro_ensure_version (requested_version found_version var_too_old)
    • macro_ensure_version2 (requested_version2 found_version2 var_too_old2)
    • macro_ensure_version_range (min_version found_version max_version var_ok)

    Use VERSION_LESS or VERSION_GREATER instead. Example:

       # error, version is too old


    This file has been removed, instead FeatureSummary.cmake from CMake >= 2.8.6 has to be used, which has even more functionality. Please have a look at the documentation of FeatureSummary.cmake on the cmake manpage.


    • macro_display_feature_log() -> feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)


    This file is now part of the extra-cmake-modules package and thus has been renamed to ECMOptionalAddSubdirectory.cmake

    • include(MacroOptionalAddSubdirectory) -> include (ECMOptionalAddSubdirectory)
    • macro_optional_add_subdirectory(...) -> ecm_optional_add_subdirectory(...)


    This file has been removed, the purpose was broken.

    • include (MacroOptionalDependPackage) -> delete
    • macro_optional_depend_package() -> delete


    This file does not exist anymore. Instead, starting with CMake 2.8.6, every find_package() call which is not REQUIRED can be disabled by setting the variable CMAKE_DISABLE_FIND_PACKAGE_<PackageName> to TRUE. This makes this macro unnecessary.

    • include(MacroFindPackage) -> delete
    • macro_optional_find_package(Foo ...) -> find_package(Foo ... )


    This file has been merged into CMake, but has been renamed to CMakePushCheckState.cmake.

    • include(MacroPushRequiredVars) -> include(CMakePushCheckState)
    • macro_push_required_vars() -> cmake_push_check_state()
    • macro_pop_required_vars() -> cmake_pop_check_state()


    This macro has been merged into CMake, but has been renamed to WriteBasicConfigVersionFile.cmake, also the syntax changed slightly. To get exactly the same behaviour as with the old macro, do as shown below. For details see the documentation in the man page.

    • include(MacroWriteBasicCMakeVersionFile) -> include (WriteBasicConfigVersionFile)
    • macro_write_basic_cmake_version_file(<outfilename> 1 2 3) -> write_basic_config_version_file(<outfilename> VERSION 1.2.3 COMPATIBILITY AnyNewerVersion )


    This has been added to CMake and provides the generate_export_header macro. This macro is the replacement of kde4_create_exports_header.


    This file does not exist. Use this instead of find_package(KF5) :

    find_package(ECM 0.0.10 REQUIRED CONFIG)
    find_package(KF5 CONFIG REQUIRED I18n KIOCore ....)

    For stricter compilation flags you can also include(KDEFrameworkCompilerSettings).

    Removed functions:

    • kde4_add_executable ➙ add_executable (the only difference was automoc, which is done by cmake now)
    • kde4_add_unit_test(exe ...) ➙ add_executable(exe ...) + add_test(mylib-exe exe) + ecm_mark_as_test(exe). The NOGUI flag is now ecm_mark_nongui_executable(exe)
    • kde4_add_ui_files ➙ qt5_wrap_ui
    • kde4_add_kcfg_files ➙ kconfig_add_kcfg_files
    • kde4_install_icons ➙ ecm_install_icons (see the notes about this command)

    Removed variables:

    • LIB_SUFFIX : if the automatic detection does not work as it should, set LIB_INSTALL_DIR
    • KDE4_CXX_FPIE_FLAGS, KDE4_PIE_LDFLAGS: not needed anymore, works automatically since CMake 2.8.11 via automatic handling of the POSITION_INDEPENDENT_CODE target property
    • KDE4_ENABLE_EXCEPTIONS: Exceptions are now handled through KDECompilerSettings.cmake, as follows
      • To enable exceptions globally (they are disabled by default) use kde_enable_exceptions()
      • To enable exceptions in a target (they are disabled by default) use kde_target_enable_exceptions()
      • To enable exceptions in just a file use kde_source_files_enable_exceptions([file1 [file2 [...]]])


    • test related settings have been removed. Get them now via find_package(KF5 COMPONENTS CMake)


    In source code for KDE Software icons are typically called following the pattern


    for instance, ox64-apps-kfontview.png which installs it to the oxygen theme, 64x64 size, apps category, and name kfontview.png.

    In ECM, the name pattern has changed to


    and the theme is specified as a parameter in

    ecm_install_icons(ICONS <icon> [<icon> [...]]
                      DESTINATION <icon_install_dir>
                      [LANG <l10n_code>]
                      [THEME <theme>])

    Notice that in this version of the command you need to explicitly list the icons to install, yet the command will also accept the backwards-compatible form

    ecm_install_icons(<icon_install_dir> [<l10n_code>])

    but generate deprecation warnings.

    Also, in KDE Frameworks 5 some old icon categories (from KDE 3 times) have been removed, you will need to rename the icon files in the source code:

    • mime ➙ mimetypes
    • filesys ➙ places
    • device ➙ devices
    • app ➙ apps
    • action ➙ actions

    (If you keep these old invalid categories they will install into actions.)

    Keep in mind that Breeze is becoming the new default icon theme. It uses Oxygen as a backup theme but you are better installing the icons into Hicolor to be compatible with all including non-KDE desktops.

    A porting script to take care of all warnings when using ecm_install_icons in the deprecated form (also renaming icons to the new pattern and taking care of the old categories) is provided in the kde-dev-scripts repository.