target_include_directories 和 include_directories

target_include_directories和include_directories是CMake中用于包含头文件路径的命令。

include_directories命令用于指定编译过程中需要搜索头文件的路径。该命令可以接受多个参数，每个参数都是一个路径，指定要搜索的头文件目录。<em>1</em><em>2</em><em>3</em>
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- *1* *2* *3* [CMake常用命令（七）include_directories和target_include_directories命令](https://blog.csdn.net/qq_26849933/article/details/127131908)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}} ] [.reference_item]
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相关问题

target_include_directories 和include_directories

target_include_directories和include_directories都是在CMake中用于指定编译器搜索头文件的路径的指令。

target_include_directories用于为特定的目标（target）设置头文件搜索路径。具体语法为：
target_include_directories(<target> [SYSTEM [AFTER|BEFORE <INTERFACE|PUBLIC|PRIVATE> [items1...])
其中，<target>表示目标名称，表示将路径视为系统路径，用于指定添加路径的位置，<INTERFACE|PUBLIC|PRIVATE>表示添加路径的可见性， [SYSTEM dir1 [dir2 ...])
其中，用于指定添加路径的位置，表示将路径视为系统路径，dir1 [dir2 ...表示要添加的路径。

总结起来，target_include_directories用于为特定目标设置头文件搜索路径，而include_directories用于为当前目录及其子目录设置头文件搜索路径。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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在cmake中执行target_include_directories(mylib PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include ) target_include_directories(mylib_shared PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include )提醒正确，执行target_include_directories(mylib mylib_shared PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include )时提醒错误 target_include_directories called with invalid arguments

执行 `target_include_directories(mylib mylib_shared PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)` 时，会出现 "target_include_directories called with invalid arguments" 的错误提示，这是因为 `target_include_directories()` 函数不支持一次为多个目标添加头文件搜索路径。

如果想要为多个目标设置相同的头文件搜索路径，需要分别为每个目标调用 `target_include_directories()` 函数。例如，下面的代码将 `${CMAKE_CURRENT_SOURCE_DIR}/include` 目录添加到 `mylib` 和 `mylib_shared` 两个目标的头文件搜索路径中：

target_include_directories(mylib
    PUBLIC
        ${CMAKE_CURRENT_SOURCE_DIR}/include
)

target_include_directories(mylib_shared
    PUBLIC
        ${CMAKE_CURRENT_SOURCE_DIR}/include
)

这样，这两个目标的依赖项就可以使用这些路径了。

需要注意的是，如果要使用不同的可见性（即 `INTERFACE`、`PUBLIC` 或 `PRIVATE`）为不同的目标添加头文件路径，需要为每个目标分别调用 `target_include_directories()` 函数，并指定相应的可见性。例如：

target_include_directories(mylib
    PUBLIC
        ${CMAKE_CURRENT_SOURCE_DIR}/include
)

target_include_directories(mylib_shared
    INTERFACE
        /usr/local/include
)

这样，`mylib` 目标的头文件路径对其依赖项可见，而 `mylib_shared` 目标的头文件路径对其依赖项不可见，但对其接口（即 `INTERFACE`）可见。