cmake:FindLIBCONFIG.cmake查找libconfig的脚本find_package脚本

以你之姓@ 2022-05-06 23:44 220阅读 0赞

[libconfig][] 是一个用于读取，操作和编写结构化配置文件的库。cmake并没有为libconfig提供find\_package脚本。所以自己撸一个，实现跨平台的查找libconfig库

FindLIBCONFIG.cmake

# - Find libconfig
    # - This module determines the libconfig library of the system
    # The following variables are set if the library found:
    # LIBCONFIG_FOUND - If false do nnt try to use libconfig.
    # LIBCONFIG_INCLUDE_DIRS - where to find the headfile of library.
    # LIBCONFIG_LIBRARY_DIRS - where to find the libconfig library.
    # LIBCONFIG_LIBRARIES, the library file name needed to use libconfig.
    # LIBCONFIG_LIBRARY - the library needed to use libconfig.
    # imported target
    #   libconfig::libconfig
    
    if(LIBCONFIG_FOUND)
    	return()
    endif()
    if (WIN32)
    	# windows下使用CONFIG模式调用find_package查找
    	find_package(LIBCONFIG CONFIG)
    else ()
    	# linux下调用pkg_check_modules 查找
        include(FindPkgConfig)
        unset(_verexp)
        if(LIBCONFIG_FIND_VERSION)
        	if(LIBCONFIG_FIND_VERSION_EXACT)    	
        	    set(_verexp "=${LIBCONFIG_FIND_VERSION}")
        	else()
        	    set(_verexp ">=${LIBCONFIG_FIND_VERSION}")
        	endif()
        endif()
        pkg_check_modules (LIBCONFIG libconfig${_verexp})
    endif()
    
    # handle the QUIETLY and REQUIRED arguments and set LIBCONFIG_FOUND to TRUE if
    # all listed variables are TRUE
    include(FindPackageHandleStandardArgs)
    FIND_PACKAGE_HANDLE_STANDARD_ARGS(LIBCONFIG DEFAULT_MSG	LIBCONFIG_LIBRARIES LIBCONFIG_INCLUDE_DIRS)
    
    if(LIBCONFIG_FOUND)
        if(NOT LIBCONFIG_FIND_QUIETLY)
            message(STATUS "  -I: ${LIBCONFIG_INCLUDE_DIRS}")
            message(STATUS "  -L: ${LIBCONFIG_LIBRARY_DIRS}")
            message(STATUS "  -l: ${LIBCONFIG_LIBRARIES}")
        endif()    
        find_library (LIBCONFIG_LIBRARY NAMES ${LIBCONFIG_LIBRARIES} PATHS ${LIBCONFIG_LIBRARY_DIRS})
    
        # 创建 imported target
        if (NOT TARGET libconfig::libconfig)
            add_library(libconfig::libconfig INTERFACE IMPORTED)
            set_target_properties(libconfig::libconfig PROPERTIES
            	INTERFACE_COMPILE_OPTIONS "${LIBCONFIG_CFLAGS}"
                INTERFACE_INCLUDE_DIRECTORIES "${LIBCONFIG_INCLUDE_DIRS}"
        		INTERFACE_LINK_LIBRARIES   "-L${LIBCONFIG_LIBRARY_DIRS} -l${LIBCONFIG_LIBRARIES }"
    	    	)
    	    if(NOT LIBCONFIG_FIND_QUIETLY)
        	    message(STATUS "IMPORTED TARGET: libconfig::libconfig,link libraies ${_link_libs}")
        	endif()
        endif ()
    endif(LIBCONFIG_FOUND)

## 调用示例 ##

# 添加FindLIBCONFIG.cmake所在的路径到CMAKE_MODULE_PATH 
    list (APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/Modules")
    find_package (LIBCONFIG 1.7.2 MODULE QUIET REQUIRED )

[libconfig]: https://www.hyperrealm.com/libconfig/libconfig_manual.html