cmake：内置时间中的make_directory [英] cmake: make_directory in built time

问题描述

我有在配置期间运行的这段代码：

I have this code that runs during configuration time:

if (NOT EXISTS "${PROJECT_BINARY_DIR}/tmpdir/")
  file (MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/tmpdir/")
  message ("Generating tmpdir directory")
endif ()

如何在构建时间内实现上述代码？

How do I implement the above code but in build time?

推荐答案

如何在构建时间内实现上述代码？

How do I implement the above code but in build time?

这取决于您何时确实需要这个目录。例如，如果在编译可执行文件 foo 之前需要它，则可以使用 add_custom_target 和添加依赖项：

It depends on when you exactly need this directory. For instance if you need it before executable foo compiled, you can use add_custom_target and add_dependencies:

add_custom_target(
    make_temp
    "${CMAKE_COMMAND}" -E make_directory "${PROJECT_BINARY_DIR}/tmpdir"
    COMMENT "Create 'tmpdir'"
)

add_executable(foo ...)
add_dependencies(foo make_temp)

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