CMAKE_CURRENT_BINARY_DIR和CMAKE_CURRENT_SOURCE_DIR

CMAKE_CURRENT_BINARY_DIR是CMake变量，用于表示当前构建目录的路径。这个路径通常是生成可执行文件、库和其他构建目标的位置。

CMAKE_CURRENT_SOURCE_DIR也是CMake变量，用于表示当前源代码目录的路径。这个路径通常是包含CMakeLists.txt文件的目录。

在CMake构建过程中，可以使用这两个变量来引用当前目录的路径，方便进行文件操作、导入其他模块或设置编译选项等操作。

相关问题

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) target_include_directories(mylib INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include> $<INSTALL_INTERFACE:include> ) add_library(mylib_shared SHARED src/header.cpp) target_include_directories(mylib_shared INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include> $<INSTALL_INTERFACE:include> ) # include_directories(include) # 指定install路径，以便于其他项目找到该库 install(TARGETS mylib mylib_shared EXPORT MyLibTargets ARCHIVE DESTINATION lib LIBRARY DESTINATION lib RUNTIME DESTINATION bin) install(FILES include/header.h DESTINATION include) # 生成MyLibConfig.cmake文件 include(CMakePackageConfigHelpers) write_basic_package_version_file( "${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 )为什么执行时，提醒/home/czl/cmake_lib/src/header.cpp:1:10: fatal error: header.h: 没有那个文件或目录

在你的 `CMakeLists.txt` 文件中，你已经将 `include/header.h` 安装到了 `include` 目录中，但是在 `add_library` 命令中没有将该目录添加到编译器的 include 路径中，所以编译器无法找到该头文件。

你可以将 `target_include_directories` 命令添加到 `add_library` 命令中，这样就可以将 `include` 目录添加到编译器的 include 路径中了。修改后的代码如下所示：

cmake_minimum_required(VERSION 3.16)
project(MyLib VERSION 1.0)

# 添加库代码文件到该库
add_library(mylib STATIC src/header.cpp)
target_include_directories(mylib 
    PUBLIC
        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
        $<INSTALL_INTERFACE:include>
)

add_library(mylib_shared SHARED src/header.cpp)
target_include_directories(mylib_shared 
    PUBLIC
        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
        $<INSTALL_INTERFACE: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
)

install(
    FILES
        "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfig.cmake"
        "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfigVersion.cmake"
    DESTINATION cmake
)

注意，在这里，我们使用了 `PUBLIC` 修饰符，将 include 路径添加到了 `mylib` 和 `mylib_shared` 目标的 include 路径中，这样在编译 `mylib` 和 `mylib_shared` 时都可以找到 `include/header.h` 头文件。

代码内容如下:# 指定该项目的名称和版本号set(MyLib_VERSION @MyLib_VERSION@)set(MyLib_INCLUDE_DIRS "@CMAKE_INSTALL_PREFIX@/include")set(MyLib_LIBRARIES "@CMAKE_INSTALL_PREFIX@/lib/libmylib.a")set(MyLib_LIBRARIES_SHARED "@CMAKE_INSTALL_PREFIX@/lib/libmylib_shared.so")# 导入MyLib的目标include("${CMAKE_CURRENT_LIST_DIR}/MyLibTargets.cmake"),include(CMakePackageConfigHelpers)configure_package_config_file( "${CMAKE_CURRENT_SOURCE_DIR}/MyLibConfig.cmake.in" "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfig.cmake" INSTALL_DESTINATION cmake)install( FILES "${CMAKE_CURRENT_BINARY_DIR}/MyLibConfig.cmake" DESTINATION cmake)中，cmake文件MyLibTargets.cmake的内容应该是什么

MyLibTargets.cmake是一个cmake模块文件，用于导出MyLib的库和可执行文件的cmake目标。它通常包含以下内容：

# 定义MyLib库的cmake目标
add_library(MyLib STATIC mylib.cpp)

# 设置MyLib库的头文件路径
target_include_directories(MyLib PUBLIC
  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
  $<INSTALL_INTERFACE:include>
)

# 设置MyLib库的链接依赖
target_link_libraries(MyLib PUBLIC
  ${MYLIB_DEPENDENCIES}
)

# 安装MyLib库的头文件和静态库文件
install(
  TARGETS MyLib
  EXPORT MyLibTargets
  ARCHIVE DESTINATION lib
  LIBRARY DESTINATION lib
  RUNTIME DESTINATION bin
  INCLUDES DESTINATION include
)

install(
  FILES mylib.h
  DESTINATION include
)

# 定义MyLib可执行文件的cmake目标
add_executable(MyExe myexe.cpp)

# 设置MyExe可执行文件的链接依赖
target_link_libraries(MyExe PRIVATE
  MyLib
)

# 安装MyExe可执行文件
install(
  TARGETS MyExe
  DESTINATION bin
)

在这个例子中，MyLibTargets.cmake文件定义了两个cmake目标：一个静态库MyLib，一个可执行文件MyExe。对于MyLib库，它设置了库的头文件路径、链接依赖和安装目录；对于MyExe可执行文件，它设置了链接依赖和安装目录。

在使用configure_package_config_file()命令时，我们会在MyLibConfig.cmake.in文件中引用MyLibTargets.cmake文件，从而将MyLib的cmake目标导入到当前项目中。