代码cmake_minimum_required(VERSION 3.16) # 声明该项目的名称和版本号 project(MyLib VERSION 1.0) # 添加库代码文件到该库 add_library(mylib STATIC src/header.cpp) add_library(mylib_shared SHARED src/header.cpp) include_directories(include) # 指定install路径,以便于其他项目找到该库 install(TARGETS mylib mylib_shared EXPORT MyLibConfig ARCHIVE DESTINATION lib LIBRARY DESTINATION lib RUNTIME DESTINATION bin) install(FILES include/mylib.h DESTINATION include) # 生成MyLibConfig.cmake文件 include(CMakePackageConfigHelpers) write_basic_package_version_file( "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfigVersion.cmake" VERSION ${MyLib_VERSION} COMPATIBILITY AnyNewerVersion ) configure_package_config_file( "${CMAKE_CURRENT_SOURCE_DIR}/MyLibConfig.cmake.in" "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfig.cmake" INSTALL_DESTINATION cmake ) install( FILES "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfig.cmake" "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfigVersion.cmake" DESTINATION cmake )在cmake时输入参数-DCMKAE_INSTALL_PREFIX=/home/czl/为什么提醒 Manually-specified variables were not used by the project: CMKAE_INSTALL_PREFIX
时间: 2024-02-12 15:04:25 浏览: 225
这个警告是因为你在命令行中手动指定了变量 `CMAKE_INSTALL_PREFIX`,但是在 CMakeLists.txt 文件中没有使用到这个变量,因此 CMake 提醒你这个变量没有被使用。
要解决这个问题,你可以在 CMakeLists.txt 文件中使用 `${CMAKE_INSTALL_PREFIX}` 变量,例如:
```
install(TARGETS mylib mylib_shared
EXPORT MyLibConfig
ARCHIVE DESTINATION ${CMAKE_INSTALL_PREFIX}/lib
LIBRARY DESTINATION ${CMAKE_INSTALL_PREFIX}/lib
RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
install(FILES include/mylib.h DESTINATION ${CMAKE_INSTALL_PREFIX}/include)
```
这样,在安装时就会使用命令行中指定的安装路径。
另外,你在命令行中拼写错误,应该是 `-DCMAKE_INSTALL_PREFIX=/home/czl/`,而不是 `-DCMKAE_INSTALL_PREFIX=/home/czl/`。
相关问题
cmake代码cmake_minimum_required(VERSION 3.16) # 声明该项目的名称和版本号 project(MyLib VERSION 1.0) # 添加库代码文件到该库 add_library(mylib STATIC src/header.cpp) add_library(mylib_shared SHARED src/header.cpp) include_directories(include) # 指定install路径,以便于其他项目找到该库 install(TARGETS mylib mylib_shared EXPORT MyLibTargets ARCHIVE DESTINATION lib LIBRARY DESTINATION lib RUNTIME DESTINATION bin) install(FILES include/header.h DESTINATION include) # 生成MyLibConfig.cmake文件 include(CMakePackageConfigHelpers) write_basic_package_version_file( "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfigVersion.cmake" VERSION ${MyLib_VERSION} COMPATIBILITY AnyNewerVersion ) configure_package_config_file( "${CMAKE_CURRENT_SOURCE_DIR}/MyLibConfig.cmake.in" "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfig.cmake" INSTALL_DESTINATION cmake ) # install( # EXPORT MyLibTargets # NAMESPACE MyLib:: # DESTINATION cmake # ) export(EXPORT MyLibTargets NAMESPACE MyLib:: FILE MyLibTargets.cmake) install(FILES ${CMAKE_CURRENT_BINARY_DIR}/MyLibTargets.cmake DESTINATION cmake) install( FILES "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfig.cmake" "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfigVersion.cmake" DESTINATION cmake )中的MyLibTargets设置了mylib的引用路径,该路径和什么有关系
`MyLibTargets` 是一个 CMake 的导出文件,它记录了库 `mylib` 的构建信息和链接信息,以便其他项目可以引用该库。在 `MyLibTargets.cmake` 文件中,`mylib` 的引用路径是相对于 `cmake` 执行路径的。
具体来说,`MyLibTargets.cmake` 文件中包含了 `mylib` 的路径信息,例如库文件的路径和头文件的路径。这些路径信息是在 `install(TARGETS ...)` 和 `install(FILES ...)` 命令中指定的。当其他项目需要使用 `mylib` 时,可以通过 `find_package()` 命令来引用 `MyLibTargets.cmake` 文件,并自动获取到 `mylib` 的路径信息。
在使用 `MyLibTargets.cmake` 文件时,你需要将该文件所在的目录添加到 CMake 的模块搜索路径中,例如:
```
list(APPEND CMAKE_MODULE_PATH "${CMAKE_INSTALL_PREFIX}/lib/cmake/MyLib")
```
这里假设 `MyLib` 的安装路径是 `${CMAKE_INSTALL_PREFIX}/lib/cmake/MyLib`,你需要将其修改为实际的安装路径。
然后,在其他项目的 CMakeLists.txt 文件中,通过 `find_package()` 命令来引用 `MyLibTargets.cmake` 文件,例如:
```
find_package(MyLib REQUIRED)
target_link_libraries(myapp MyLib::mylib)
```
这里假设 `MyLib` 的库名为 `mylib`,你需要将其修改为实际的库名。
记住cmake代码cmake_minimum_required(VERSION 3.16) # 声明该项目的名称和版本号 project(MyLib VERSION 1.0) # 添加库代码文件到该库 add_library(mylib STATIC src/header.cpp) add_library(mylib_shared SHARED src/header.cpp) include_directories(include) # 指定install路径,以便于其他项目找到该库 install(TARGETS mylib mylib_shared EXPORT MyLibTargets ARCHIVE DESTINATION lib LIBRARY DESTINATION lib RUNTIME DESTINATION bin) install(FILES include/header.h DESTINATION include) # 生成MyLibConfig.cmake文件 include(CMakePackageConfigHelpers) write_basic_package_version_file( "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfigVersion.cmake" VERSION ${MyLib_VERSION} COMPATIBILITY AnyNewerVersion ) configure_package_config_file( "${CMAKE_CURRENT_SOURCE_DIR}/MyLibConfig.cmake.in" "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfig.cmake" INSTALL_DESTINATION cmake ) # install( # EXPORT MyLibTargets # NAMESPACE MyLib:: # DESTINATION cmake # ) export(EXPORT MyLibTargets NAMESPACE MyLib:: FILE MyLibTargets.cmake) install(FILES ${CMAKE_CURRENT_BINARY_DIR}/MyLibTargets.cmake DESTINATION cmake) install( FILES "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfig.cmake" "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfigVersion.cmake" DESTINATION cmake ),并在/home/czl/cmake_lib/build目录下执行命令cmake .. -DCMAKE_INSTALL_PREFIX=/home/czl/pkg_test,并告诉我生成的MyLibTargets.cmake文件中,静态库的引用路径是什么
生成的MyLibTargets.cmake文件中,静态库的引用路径是:
```
target_link_libraries(MyLib::mylib INTERFACE
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/../lib/libmylib.a>
$<INSTALL_INTERFACE:lib/libmylib.a>
)
```
其中,`$<BUILD_INTERFACE>`指的是在构建项目时引用的路径,`$<INSTALL_INTERFACE>`指的是在安装项目后引用的路径。在这个例子中,静态库`libmylib.a`在构建项目时的路径为`${CMAKE_CURRENT_LIST_DIR}/../lib/libmylib.a`,在安装项目后的路径为`lib/libmylib.a`。
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