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我目前正在配置我的项目的构建，并决定拆分CMakeLists.txt为负责单个构建子任务（如测试、打包、编译等）的子文件。问题是cmake子文件需要有关如何完成任务的信息。所以我决定在包含模块之前需要设置一些变量。看起来像

CpackMylib.cmake：

if(NOT DEFINED MYLIB_PACKAGE_NAME)
    message(FATAL_ERROR "MYLIB_PACKAGE_NAME variable must be set")
endif()

if(NOT DEFINED MYLIB_VERSION_MAJOR)
    message(FATAL_ERROR "MYLIB_VERSION_MAJOR variable must be set")
endif()

if(NOT DEFINED MYLIB_VERSION_MINOR)
    message(FATAL_ERROR "MYLIB_VERSION_MINOR variable must be set")
endif()

if(NOT DEFINED MYLIB_VERSION_PATCH)
    message(FATAL_ERROR "MYLIB_VERSION_PATCH variable must be set")
endif()

set(CPACK_PACKAGE_VERSION_MAJOR ${MYLIB_VERSION_MAJOR})

set(CPACK_PACKAGE_VERSION_MINOR ${MYLIB_VERSION_MINOR})

set(CPACK_PACKAGE_VERSION_PATCH ${MYLIB_VERSION_PATCH})

set(CPACK_DEBIAN_PACKAGE_NAME "${MYLIB_PACKAGE_NAME}-${MYLIB_VERSION_MAJOR}")

set(CPACK_DEBIAN_PACKAGE_FILE_NAME ${MYLIB_PACKAGE_NAME}-${MYLIB_VERSION_MAJOR})

#other settings...

include(CPack)

和根CMakeLists.txt：

set(MYLIB_VERSION_MAJOR 0)
set(MYLIB_VERSION_MINOR 0)
set(MYLIB_VERSION_PATCH 1)
set(MYLIB_PACKAGE_NAME ${PROJECT_NAME})
include(cmake/CpackMylib.cmake)

所以我需要定义项目特定的变量，这些变量将用于使用CPack. 我是新手CMake，这样做似乎很自然。但我不确定在处理CMake.

CMake定义子模块需要的所有变量并在根目录中提供它们是否有意义CMakeLists.txt？

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