CMAKE - Glob files in post build

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I want to copy intermediate object files from build folder into another folder. I have used : file(GLOB OUTPUT_COMPILED_FILES_POST CONFIGURE_DEPENDS "IntCode/*/*" "ApplicationComps/*/src/Common/*.*)" to collect the names of the files as they are plenty.

and then I used file(COPY ${OUTPUT_COMPILED_FILES_POST} DESTINATION ${OBJECTS_FOLDER}) to copy the files but It doesn't do anything as when the glob command is working the files are not yet generated.

I have multiple sub directories the 4th one has add_executable which generates object files and exe file the fifth and sixth sub directories need some object files.

So. My question:

Is there any other way to do this?

glob copy cmake
2 Answers

If you can refactor your glob and instead only copy the files under a certain directory, you can use this command

add_custom_command(TARGET bar
    # Run after all other rules within the target have been executed
    POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E copy_directory source destination
    COMMENT "This command will be executed after building bar"
)
user_8232820

I have multiple sub directories the 4th one has add_executable which generates object files and exe file the fifth and sixth sub directories need some object files.

You can achieve this with object libraries in CMake. See below for a sketch and the documentation here:

Suppose you have a higher-level CMakeLists.txt file with:

...
add_subdirectory(subdir1)
add_subdirectory(subdir2)
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(subdir5)
add_subdirectory(subdir6)
...

Then in subdir4's CMakeLists.txt you would write:

add_library(target4objs OBJECT src1.cpp src2.cpp ...)
add_executable(target4 extra_src_not_shared.cpp ...)
target_link_libraries(target4 PRIVATE target4objs)

And in subdir5/6 you would write:

add_executable(target5 src1.cpp ...)
target_link_libraries(target5 PRIVATE target4objs)

General advice: manually copying files from the build tree to either elsewhere in the build tree or especially to the source tree is practically never needed and a bad idea.

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