Creating a directory in CMake
In CMake, I want to create a director开发者_JS百科y if it doesn't already exist. How can I do this?
When do you want to create the directory?
At build system generation
To create a directory when CMake generates the build system,
file(MAKE_DIRECTORY ${directory})
At build time
In the add_custom_command()
command (which adds a custom build rule to the generated build system), and the add_custom_target()
command (which adds a target with no output so it will always be built), you specify the commands to execute at build time. Create a directory by executing the command ${CMAKE_COMMAND} -E make_directory
. For example:
add_custom_target(build-time-make-directory ALL
COMMAND ${CMAKE_COMMAND} -E make_directory ${directory})
At install time
To create a directory at install time,
install(DIRECTORY DESTINATION ${directory})
To create a directory at install time,
install(DIRECTORY DESTINATION ${directory})
These will both run at configure time:
file(MAKE_DIRECTORY ${directory})
execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${directory})
To create during the build, use a custom target:
add_custom_target(mytargetname ALL COMMAND ${CMAKE_COMMAND} -E make_directory ${directory})
In addition to Chin Huang's reply, you can also do this at build time with add_custom_command
:
add_custom_command(TARGET ${target_name} PRE_BUILD COMMAND ${CMAKE_COMMAND} -E make_directory ${directory})
You can also change the moment, when your directory is created with PRE_BUILD
| PRE_LINK
| POST_BUILD
parameters.
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