阅读 apiextractor 的CMakeList.txt文件
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拖了近一个月了,终于有信心尝试看看 apiextractor-0.10.0 的 CMakeList.txt 了 。简单整理一下,作为学习笔记,备忘。
走马观花
include(icecc.cmake)
包含一个文件,其内容比较简单(如果找到分布式编译器icecc,则使用它)
project(apiextractor)cmake_minimum_required(VERSION 2.6)find_package(Qt4 4.5.0 REQUIRED)find_package(LibXml2 2.6.32)find_package(LibXslt 1.1.19)
常规内容,依赖 Qt4(必须),LibXml2,LibXslt 3个软件包
option(DISABLE_DOCSTRINGS "Disable documentation extraction." FALSE)option(BUILD_TESTS "Build tests." TRUE)option(INSTALL_TESTS "Install tests" FALSE)option(ENABLE_VERSION_SUFFIX "Used to use current version in suffix to generated files. This is used to allow multiples versions installed simultaneous." FALSE)
4个选项
if (NOT DISABLE_DOCSTRINGS) if (NOT LIBXSLT_FOUND OR NOT LIBXML2_FOUND) set(DISABLE_DOCSTRINGS TRUE) message(WARNING "libxslt and/or libxml not found, disabling support to doc strings!") endif()endif()
如果没有禁用DOCSTRINGS,但是没有找到LibXml2和LibXslt,同样禁用
if(MSVC) set(CMAKE_CXX_FLAGS "/Zc:wchar_t- /GR /EHsc /DWIN32 /D_WINDOWS /D_SCL_SECURE_NO_WARNINGS")elseif(CMAKE_HOST_UNIX) option(ENABLE_GCC_OPTIMIZATION "Enable specific GCC flags to optimize library size and performance. Only available on Release Mode" 0) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fvisibility=hidden") set(CMAKE_CXX_FLAGS_DEBUG "-g") if(ENABLE_GCC_OPTIMIZATION) set(CMAKE_BUILD_TYPE Release) set(CMAKE_CXX_FLAGS_RELEASE "-DNDEBUG -Os -Wno-strict-aliasing -Wl,-O1") if (NOT CMAKE_HOST_APPLE) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--hash-style=gnu") endif() endif() if(NOT CMAKE_HOST_APPLE) set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--version-script,${CMAKE_CURRENT_SOURCE_DIR}/symbols.filter") endif()endif()
为MSVC、UNIX等分别设置一些选项
if(NOT CMAKE_BUILD_TYPE) set(CMAKE_BUILD_TYPE Release)endif()
如果没有设置构建类型,则使用Release
if(BUILD_TESTS) set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/tests)endif ()
如果需要构建测试程序,则设置库文件输出目录为 tests子目录
set(apiextractor_MAJOR_VERSION 0)set(apiextractor_MINOR_VERSION 10)set(apiextractor_MICRO_VERSION 0)set(apiextractor_VERSION "${apiextractor_MAJOR_VERSION}.${apiextractor_MINOR_VERSION}.${apiextractor_MICRO_VERSION}")configure_file(apiextractorversion.h.in ${CMAKE_CURRENT_BINARY_DIR}/apiextractorversion.h @ONLY)set(apiextractor_SOVERSION ${apiextractor_MAJOR_VERSION}.${apiextractor_MINOR_VERSION})
设置版本号,并使用配置文件(只替代@VAR@这样的变量)
set(QT_USE_QTCORE 1)set(QT_USE_QTXML 1)include(${QT_USE_FILE})add_definitions(${QT_DEFINITIONS})add_definitions(-DQT_PLUGIN)add_definitions(-DQT_SHARED)add_definitions(-DRXX_ALLOCATOR_INIT_0)
Qt的常规设置
if(ENABLE_VERSION_SUFFIX) set(apiextractor_SUFFIX "-${apiextractor_MAJOR_VERSION}.${apiextractor_MINOR_VERSION}")else() set(apiextractor_SUFFIX "")endif()
控制是否需要后缀
set(apiextractor_SRCapiextractor.cppabstractmetabuilder.cpp#omit ...)if (NOT DISABLE_DOCSTRINGS) set(apiextractor_SRC ${apiextractor_SRC} docparser.cpp doxygenparser.cpp qtdocparser.cpp ) set(APIEXTRACTOR_EXTRA_INCLUDES ${LIBXSLT_INCLUDE_DIR} ${LIBXML2_INCLUDE_DIR}) set(APIEXTRACTOR_EXTRA_LIBRARIES ${LIBXSLT_LIBRARIES} ${LIBXML2_LIBRARIES})else() set(APIEXTRACTOR_EXTRA_INCLUDES "") set(APIEXTRACTOR_EXTRA_LIBRARIES "")endif()
将源文件名存入变量 apiextractor_SRC,如果启用了DOCSTRINGS,则设置LibXslt和LibXml2的头文件路径和库
set(LIB_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}" CACHE PATH "The subdirectory relative to the install prefix where libraries will be installed (default is /lib${LIB_SUFFIX})" FORCE)
设置一个变量,稍后作为库文件安装路径
qt4_add_resources(apiextractor_RCCS_SRC generator.qrc)qt4_automoc(apiextractor_SRC)
Qt 常规设置,注意qt4_automoc 根据源文件中的#include "xxx.moc"来确定处理相应的头文件
include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/parser ${CMAKE_CURRENT_SOURCE_DIR}/parser/rpp ${QT_INCLUDE_DIR} ${APIEXTRACTOR_EXTRA_INCLUDES} )add_library(apiextractor SHARED ${apiextractor_SRC} ${apiextractor_RCCS_SRC})target_link_libraries(apiextractor ${APIEXTRACTOR_EXTRA_LIBRARIES} ${QT_QTCORE_LIBRARY} ${QT_QTXMLPATTERNS_LIBRARY} ${QT_QTXML_LIBRARY})set_target_properties(apiextractor PROPERTIES VERSION ${apiextractor_VERSION} SOVERSION ${apiextractor_SOVERSION} OUTPUT_NAME "apiextractor${apiextractor_SUFFIX}" DEFINE_SYMBOL APIEXTRACTOR_EXPORTS)
设置头文件目录,添加库文件目标,设置目标属性(注意DEFINE_SYMBOL)
# uninstall targetconfigure_file("${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake" "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake" IMMEDIATE @ONLY)add_custom_target(uninstall "${CMAKE_COMMAND}" -P "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake")set(ARCHIVE_NAME ${CMAKE_PROJECT_NAME}-${apiextractor_VERSION})add_custom_target(dist COMMAND mkdir -p "${CMAKE_BINARY_DIR}/${ARCHIVE_NAME}" && git log > "${CMAKE_BINARY_DIR}/${ARCHIVE_NAME}/ChangeLog" && git archive --prefix=${ARCHIVE_NAME}/ HEAD --format=tar --output="${CMAKE_BINARY_DIR}/${ARCHIVE_NAME}.tar" && tar -C "${CMAKE_BINARY_DIR}" --owner=root --group=root -r "${ARCHIVE_NAME}/ChangeLog" -f "${CMAKE_BINARY_DIR}/${ARCHIVE_NAME}.tar" && bzip2 -f9 "${CMAKE_BINARY_DIR}/${ARCHIVE_NAME}.tar" && echo "Source package created at ${CMAKE_BINARY_DIR}/${ARCHIVE_NAME}.tar.bz2./n" WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
两个自定义的目标 uninstall 和 dist
set(root_HEADERSapiextractormacros.habstractmetalang.hapiextractor.hgraph.hreporthandler.htypesystem.hfileout.hdocparser.hqtdocparser.hinclude.htypedatabase.h)
将文件放于变量 root_HEADERS,稍后会用在install中。(这些文件最终会被安装)
if (BUILD_TESTS) enable_testing() add_subdirectory(tests)endif()
控制单元测试的启用
add_subdirectory(data)add_subdirectory(doc)
前者生成ApiExtractorConfig.cmake等文件,后者生成文档
install(FILES ${root_HEADERS} DESTINATION include/apiextractor${apiextractor_SUFFIX})install(TARGETS apiextractor EXPORT apiextractor LIBRARY DESTINATION "${LIB_INSTALL_DIR}" ARCHIVE DESTINATION "${LIB_INSTALL_DIR}" RUNTIME DESTINATION bin)
需要安装的文件,及安装到的路径
知识点备忘
- 布尔真:1, ON, YES, TRUE, Y, 非零数
- 布尔假:0, OFF, NO, FALSE, N, IGNORE, "", 后缀为'-NOTFOUND'的
option()
option(<option_variable> "describing" [initial value])
为用户提供ON/OFF选项,初始值没有指定的话,采用OFF
set_target_properties()
set_target_properties(target1 target2 ... PROPERTIES prop1 value1 prop2 value2 ...)
DEFINE_SYMBOL 在生成动态库,定义编译预处理器符号。如果没有指定,默认是 target_EXPORTS
VERSION 与 SOVERSION 分别是构建版本号 和 api 版本号
PREFIX 与 SUFFIX 分别是前缀(比如lib)和后缀(比如.so)
IMPORT_PREFIX 与 IMPORT_SUFFIX 导入库的前缀和后缀
OUTPUT_NAME
install(TARGETS...)
install(TARGETS targets... [EXPORT <export-name>] [[ARCHIVE|LIBRARY|RUNTIME|FRAMEWORK|BUNDLE| PRIVATE_HEADER|PUBLIC_HEADER|RESOURCE] [DESTINATION <dir>] [PERMISSIONS permissions...] [CONFIGURATIONS [Debug|Release|...]] [COMPONENT <component>] [OPTIONAL] [NAMELINK_ONLY|NAMELINK_SKIP] ] [...])
- EXPORT 必须出现在 RUNTIME, LIBRARY, ARCHIVE 之前。配合下面的 install(EXPORT) 使用
install(EXPORT...)
install(EXPORT <export-name> DESTINATION <dir> [NAMESPACE <namespace>] [FILE <name>.cmake] [PERMISSIONS permissions...] [CONFIGURATIONS [Debug|Release|...]] [COMPONENT <component>])
- 有助于外部的工程使用本工程构建和安装的目标。
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