CMake学习笔记5

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1、cmake学习笔记(五)在cmake学习笔记(三)中简单学习了find_package的model模式，在cmake学习笔记(四)中了解一个CMakeCache相关的东西。但靠这些知识还是不能看懂PySide使用CMakeLists文件，接下来继续学习find_package的config模式及packageconfigure文件相关知识find_package的config模式当CMakeLists.txt中使用find_package命令时，首先启用的是module模式：按照CMAKE_MODULE_PATH路径和cmake的安

2、装路径去搜索finder文件Find.cmake如果finder未找到，则开始config模式：将在下列路径下查找配置文件Config.cmake或-config.cmake/(W)/(cmake

3、CMake)/(W)/*/(W)/*/(cmake

4、CMake)/(W)/(share

5、lib)/cmake/*/(U)/(share

6、lib)

7、/*/(U)/(share

8、lib)/*/(cmake

9、CMake)/(U)·find_package参数及规则见manualConfig.cmake该文件至少需提供头文件路径和库文件信息。比如ApiExtractorConfig.cmake在Windows下一个例子：#-trytofindAPIEXTRACTOR#APIEXTRACTOR_INCLUDE_DIR-DirectoriestoincludetouseAPIEXTRACTOR#APIEXTRACTOR_LIBRARIE

10、S-FilestolinkagainsttouseAPIEXTRACTORSET(APIEXTRACTOR_INCLUDE_DIR"D:/shiboken/dist/include/apiextractor")if(MSVC)SET(APIEXTRACTOR_LIBRARY"D:/shiboken/dist/lib/apiextractor.lib")elseif(WIN32)SET(APIEXTRACTOR_LIBRARY"D:/shiboken/dist/bin/apiextractor.dll")else()SET(APIEX

11、TRACTOR_LIBRARY"D:/shiboken/dist/lib/apiextractor.dll")endif()该文件是通过configure_file机制生成的，我们看看ApiExtractorConfig.cmake.in文件：SET(APIEXTRACTOR_INCLUDE_DIR"@CMAKE_INSTALL_PREFIX@/include/apiextractor@apiextractor_SUFFIX@")if(MSVC)SET(APIEXTRACTOR_LIBRARY"@LIB_INSTALL_DIR@/@

12、CMAKE_SHARED_LIBRARY_PREFIX@apiextractor@apiextractor_SUFFIX@@LIBRARY_OUTPUT_SUFFIX@.lib")elseif(WIN32)SET(APIEXTRACTOR_LIBRARY"@CMAKE_INSTALL_PREFIX@/bin/@CMAKE_SHARED_LIBRARY_PREFIX@apiextractor@apiextractor_SUFFIX@@LIBRARY_OUTPUT_SUFFIX@@CMAKE_SHARED_LIBRARY_SUFFIX@

13、")else()SET(APIEXTRACTOR_LIBRARY"@LIB_INSTALL_DIR@/@CMAKE_SHARED_LIBRARY_PREFIX@apiextractor@apiextractor_SUFFIX@@LIBRARY_OUTPUT_SUFFIX@@CMAKE_SHARED_LIBRARY_SUFFIX@")endif()对应的命令(变量的定义略过)configure_file("${CMAKE_CURRENT_SOURCE_DIR}/ApiExtractorConfig.cmake.in""${CMAKE_

14、CURRENT_BINARY_DIR}/ApiExtractorConfig.cmake"@ONLY)ConfigVersion.cmake该文件用来比对版本是否匹配，看看ApiExtractorConfigVersion