We will start out with the following CMake project:
cmake_minimum_required(VERSION 3.5 FATAL_ERROR)project(recipe-06 LANGUAGES NONE)macro(custom_include_guard) if(NOT DEFINED included_modules) set(included_modules) endif() if ("${CMAKE_CURRENT_LIST_FILE}" IN_LIST included_modules) message(WARNING "module ${CMAKE_CURRENT_LIST_FILE} processed more than once") endif() list(APPEND included_modules ${CMAKE_CURRENT_LIST_FILE})endmacro()include(cmake/custom.cmake)message(STATUS "list of all included modules: ${included_modules}")
This code defines a custom include guard, includes a custom module (the same module as in the previous recipe), and prints the list of all included modules. For CMake 3.10 and higher, we now know from the ...
