Start with basic template for kirigami app using cmake.

3rdparty/CMakeLists.txt

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+set(BUILD_SHARED_LIBS 0)
+ 
+add_subdirectory(kirigami)

3rdparty/ecm/ECMConfig.cmake

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+
+####### Expanded from @PACKAGE_INIT@ by configure_package_config_file() #######
+####### Any changes to this file will be overwritten by the next CMake run ####
+####### The input file was ECMConfig.cmake.in                            ########
+
+get_filename_component(PACKAGE_PREFIX_DIR "${CMAKE_CURRENT_LIST_DIR}/../" ABSOLUTE)
+
+macro(set_and_check _var _file)
+  set(${_var} "${_file}")
+  if(NOT EXISTS "${_file}")
+    message(FATAL_ERROR "File or directory ${_file} referenced by variable ${_var} does not exist !")
+  endif()
+endmacro()
+
+macro(check_required_components _NAME)
+  foreach(comp ${${_NAME}_FIND_COMPONENTS})
+    if(NOT ${_NAME}_${comp}_FOUND)
+      if(${_NAME}_FIND_REQUIRED_${comp})
+        set(${_NAME}_FOUND FALSE)
+      endif()
+    endif()
+  endforeach()
+endmacro()
+
+####################################################################################
+
+set(ECM_FIND_MODULE_DIR "${PACKAGE_PREFIX_DIR}/extra-cmake-modules/find-modules/")
+
+set(ECM_MODULE_DIR "${PACKAGE_PREFIX_DIR}/extra-cmake-modules/modules/")
+
+set(ECM_KDE_MODULE_DIR "${PACKAGE_PREFIX_DIR}/extra-cmake-modules/kde-modules/")
+
+set(ECM_PREFIX "${PACKAGE_PREFIX_DIR}")
+
+set(ECM_MODULE_PATH "${ECM_MODULE_DIR}" "${ECM_FIND_MODULE_DIR}" "${ECM_KDE_MODULE_DIR}")
+
+set(ECM_GLOBAL_FIND_VERSION "${ECM_FIND_VERSION}")
+
+include("${ECM_MODULE_DIR}/ECMUseFindModules.cmake")

3rdparty/ecm/ECMConfigVersion.cmake

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+# This is a basic version file for the Config-mode of find_package().
+# It is used by write_basic_package_version_file() as input file for configure_file()
+# to create a version-file which can be installed along a config.cmake file.
+#
+# The created file sets PACKAGE_VERSION_EXACT if the current version string and
+# the requested version string are exactly the same and it sets
+# PACKAGE_VERSION_COMPATIBLE if the current version is >= requested version.
+# The variable CVF_VERSION must be set before calling configure_file().
+
+set(PACKAGE_VERSION "5.63.0")
+
+if(PACKAGE_VERSION VERSION_LESS PACKAGE_FIND_VERSION)
+  set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else()
+  set(PACKAGE_VERSION_COMPATIBLE TRUE)
+  if(PACKAGE_FIND_VERSION STREQUAL PACKAGE_VERSION)
+    set(PACKAGE_VERSION_EXACT TRUE)
+  endif()
+endif()
+
+# if the installed or the using project don't have CMAKE_SIZEOF_VOID_P set, ignore it:
+if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "" OR "" STREQUAL "")
+   return()
+endif()
+
+# check that the installed version has the same 32/64bit-ness as the one which is currently searching:
+if(NOT CMAKE_SIZEOF_VOID_P STREQUAL "")
+   math(EXPR installedBits " * 8")
+   set(PACKAGE_VERSION "${PACKAGE_VERSION} (${installedBits}bit)")
+   set(PACKAGE_VERSION_UNSUITABLE TRUE)
+endif()