Start with basic template for kirigami app using cmake.

3rdparty/ecm/ECMConfig.cmake

@@ -0,0 +1,39 @@
+
+####### 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")