I have the following CMake segment to copy some DLLs I require into the output folder of my executable:
file(GLOB Debug_DLLS "${SDK_DIR}/Libs/*.dll")
file(GLOB Release_DLLS "${SDK_DIR}/Libsr/*.dll")
add_custom_command(TARGET myApp POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy_if_different
$<$<CONFIG:Debug>:${Debug_DLLS}>
$<$<NOT:$<CONFIG:Debug>>:${Release_DLLS}>
$<TARGET_FILE_DIR:myApp>
)
copy_if_different is supposed to support multiple arguments.
I am 100% sure that SDK_DIR is a valid folder and also that the Release_DLLS and Debug_DLLS variable is valid. The code works if I just put in a simple filepath into Release_DLLs.
But when building I simply get the error: "The system cannot find the provided path" in my native system language. Why isn't this working with multiple files?
I needed to quote the generator expressions and add COMMAND_EXPAND_LISTS to the command.
The following code works and is probably the most flexible solution to copy different DLLs to the output directory based on the build type:
file(GLOB Debug_DLLS "${SDK_DIR}/Libs/*.dll")
file(GLOB Release_DLLS "${SDK_DIR}/Libsr/*.dll")
add_custom_command(TARGET myApp POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy_if_different
"$<$<CONFIG:Debug>:${Debug_DLLS}>"
"$<$<NOT:$<CONFIG:Debug>>:${Release_DLLS}>"
$<TARGET_FILE_DIR:myApp>
COMMAND_EXPAND_LISTS
)
Related
I'm trying to copy several targets into a specific build directory using the add_custom_command which is as follows:
get_filename_component(buildDirRelFilePath "libDetector_dynamic.so"
REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
add_custom_command(
TARGET Detector_dynamic POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy
${buildDirRelFilePath}
${CMAKE_INSTALL_PREFIX}/lib/libDetector_dynamic.so)
It's very desirable to simply remove all the hardcoded values that refer to the target being built and instead use a CMake's variable that changes automatically for each target.
So use generator expressions.
add_library(Detector_dynamic ...)
add_custom_command(
TARGET Detector_dynamic POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy
$<TARGET_FILE:Detector_dynamic>
${CMAKE_INSTALL_PREFIX}/lib/)
I do not think there's ever need to reference the filename by the name. For me it looks like you should use CMAKE_LIBRARY_OUTPUT_DIRECTORY or just maybe just write install scripts.
I have a library and a test projects on CMake, and I'm using this directory structure with two (project) CMakeLists.txt:
/
|- CMakeLists.txt
|- include/libName
|- src/...
|
|- test/
|- CMakeLists.txt
|- src/...
The outer project list defines the library, like:
add_library(libName ${SRC} ${INCLUDE})
And adds 'test' as subdirectory:
add_subdirectory(test)
The test project list defines the executable and a test, like:
add_executable(NameTest ${SRC})
target_link_libraries(NameTest libName)
add_test(NAME NameTest COMMAND NameTest)
The problem
I'm trying to build and execute the test program when the library is built. If any test fails, I want the build of the library fail too.
This is what I have (inside the outer lists file):
add_custom_command(
TARGET libName
POST_BUILD
COMMAND CTEST_OUTPUT_ON_FAILURE=1 ctest
DEPENDS NameTest # <- This is driving me crazy!
)
This command ignores completely if the target 'NameTest' is built, if there is a file with that name, or if not. I can't notice any difference if the whole 'DEPENDS' option is removed.
I even modified like:
add_custom_command(
TARGET libName
POST_BUILD
COMMAND ${CMAKE_COMMAND} -E echo "Bip! Bip! Bip!"
DEPENDS this_is_not_an_existent_file_nor_target
)
And the command is triggered anyway. I'm not very sure about if this is the option I need, so:
Why is this not working?
How can I achieve my real purpose?
Thank you.
Edit: ctest will execute every test (add_test), but the NameTest executable (yet listed) must be built before calling it! Now would be built after the library, but before the 'POST_BUILD' custom command. It fails, of course.
I want CMake realize NameTest is necessary for running that custom command.
Edit: I find useful the Angew's answer, so I accepted his answer and refined it a little bit:
add_custom_command(
TARGET libName
POST_BUILD
COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target NameTest --config $<CONFIG>
COMMAND ${CMAKE_CTEST_COMMAND} -C $<CONFIG> --output-on-failure
)
Thank you!
1. Why is this not working?
Because you're mixing options from two distinct signatures of add_custom_command. DEPENDS comes from the form which is used to generate a file. TARGET and POST_BUILD are from the form which adds pre/post build commands to existing targets.
See the documentation of add_custom_command for more details on the two uses.
2. How can I achieve my real purpose?
I believe the following should do what you want to:
add_custom_command(
TARGET libName
POST_BUILD
COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target NameTest --config $<CONFIG>
COMMAND CTEST_OUTPUT_ON_FAILURE=1 ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target test --config $<CONFIG>
)
Working on a project using CMake. This project contains an executable and a python script. These two files should be compiled/copied in the same directory at build.
I try something like :
add_executable( ${myTarget} ${all_c_sources} )
add_custom_command(
TARGET ${myTarget} POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy ${pythonScriptPath} ${RUNTIME_OUTPUT_DIRECTORY}/
)
The executable is well build in a default location like ${CMAKE_BINARY_DIR}/Debug but the copy of the python script failed :
c:\Program Files (x86)\CMake\bin\cmake.exe" -E copy C:/.../script.py /\r
My goal is to use CMake default behavior as mush as possible.
Is there a simple way to get the default output path ?
Thanks !
Something like this:
add_custom_command(TARGET ${LIBRARY_NAME} POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy_if_different
$<TARGET_FILE:${LIBRARY_NAME}>
$<TARGET_FILE_DIR:${CMAKE_PROJECT_NAME}>/path/to/where/module/should/be
COMMENT "Copying file to Runtime directory: " $<TARGET_FILE:${LIBRARY_NAME}>
)
Adjust it to your needs.
Read about CMake Generator Expressions if you need to know more.
I am attempting to copy multiple files using the ${CMAKE_COMMAND} -E copy <from> <to> format, but I was wondering if there was a way to provide a number of files to copy to a specific directory. It seems the cmake copy only allows for one file to be copied at a time. I really don't want to use the copy command repeatedly when I would rather provide a list of files to copy as the first argument.
I'm thinking the easiest solution is to use the platform dependent "cp" command. While this definitely is not good for portability, our system is guaranteed to be built on Linux. A simple, platform independent solution would be better.
Copying multiple files is available from CMake 3.5
cmake -E copy <file>... <destination>
"cmake -E copy" support for multiple files
Command-Line Tool Mode
I did it with a loop
# create a list of files to copy
set( THIRD_PARTY_DLLS
C:/DLLFOLDER/my_dll_1.dll
C:/DLLFOLDER/my_dll_2.dll
)
# do the copying
foreach( file_i ${THIRD_PARTY_DLLS})
add_custom_command(
TARGET ${VIEWER_NAME}
POST_BUILD
COMMAND ${CMAKE_COMMAND}
ARGS -E copy ${file_i} "C:/TargetDirectory"
)
endforeach( file_i )
A relatively simple workaround would be to use ${CMAKE_COMMAND} -E tar to bundle the sources, move the tarball and extract it in the destination directory.
This could be more trouble than it's worth if your sources are scattered across many different directories, since extracting would retain the original directory structure (unlike using cp). If all the files are in one directory however, you could achieve the copy in just 2 add_custom_command calls.
Say your sources to be moved are all in ${CMAKE_SOURCE_DIR}/source_dir, the destination is ${CMAKE_SOURCE_DIR}/destination_dir and your list of filenames (not full paths) are in ${FileList}. You could do:
add_custom_command(
TARGET MyExe POST_BUILD
COMMAND ${CMAKE_COMMAND} -E tar cfj ${CMAKE_BINARY_DIR}/temp.tar ${FileList}
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/source_dir)
add_custom_command(
TARGET MyExe POST_BUILD
COMMAND ${CMAKE_COMMAND} -E rename ${CMAKE_BINARY_DIR}/temp.tar temp.tar
COMMAND ${CMAKE_COMMAND} -E tar xfj temp.tar ${FileList}
COMMAND ${CMAKE_COMMAND} -E remove temp.tar
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/destination_dir)
Since I had more or less exactly the same issue and didn't like the solutions above I eventually came up with this. It does more than just copy files, but I thought I would post the whole thing as it shows the flexibility of the the technique in conjunction with generator expressions that allow different files and directories depending on the build variant. I believe the COMMAND_EXPAND_LISTS is critical to the functionality here.
This function not only copies some files to a new directory but then runs a command on each of them. In this case it uses the microsoft signtool program to add digital signatures to each file.
cmake_minimum_required (VERSION 3.12)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
SET(ALL_3RD_PARTY_DLLS_DEBUG "${CMAKE_CURRENT_SOURCE_DIR}/file1.dll" "${CMAKE_CURRENT_SOURCE_DIR}/file2.dll")
SET(ALL_3RD_PARTY_DLLS_RELEASE "${CMAKE_CURRENT_SOURCE_DIR}/file3.dll" "${CMAKE_CURRENT_SOURCE_DIR}/file4.dll")
STRING(REPLACE "${CMAKE_CURRENT_SOURCE_DIR}" ";${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Debug" ALL_OUTPUT_3RD_PARTY_DLLS_DEBUG ${ALL_3RD_PARTY_DLLS_DEBUG})
LIST(REMOVE_AT ALL_OUTPUT_3RD_PARTY_DLLS_DEBUG 0)
STRING(REPLACE "${CMAKE_CURRENT_SOURCE_DIR}" ";${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Release" ALL_OUTPUT_3RD_PARTY_DLLS_RELEASE ${ALL_3RD_PARTY_DLLS_RELEASE})
LIST(REMOVE_AT ALL_OUTPUT_3RD_PARTY_DLLS_RELEASE 0)
FILE(TO_NATIVE_PATH "C:\\Program\ Files\ (x86)\\Windows\ Kits\\10\\bin\\10.0.17763.0\\x86\\signtool.exe" SIGNTOOL_COMMAND)
add_custom_target(Copy3rdPartyDLLs ALL
COMMENT "Copying and signing 3rd Party DLLs"
VERBATIM
COMMAND_EXPAND_LISTS
COMMAND ${CMAKE_COMMAND} -E
make_directory "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/$<$<CONFIG:Release>:Release>$<$<CONFIG:Debug>:Debug>/"
COMMAND ${CMAKE_COMMAND} -E
copy_if_different
"$<$<CONFIG:Release>:${ALL_3RD_PARTY_DLLS_RELEASE}>"
"$<$<CONFIG:Debug>:${ALL_3RD_PARTY_DLLS_DEBUG}>"
"${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/$<$<CONFIG:Release>:Release>$<$<CONFIG:Debug>:Debug>/"
COMMAND ${SIGNTOOL_COMMAND} sign
"$<$<CONFIG:Release>:${ALL_OUTPUT_3RD_PARTY_DLLS_RELEASE}>"
"$<$<CONFIG:Debug>:${ALL_OUTPUT_3RD_PARTY_DLLS_DEBUG}>"
)
I hope this saves someone the day or so it took me to figure this out.
In order to run the unit tests in one of my projects, I have a custom command which copies the executable, libraries, and other related files to somewhere else so that they can be run with a specific setup rather than running them where they're built. On Linux, this is quite straightforward. But on Windows, I've hit a bit of a snag due to the fact that cmake appends the configuration name to the ouput directories (which I like in general, but it screws up what I'm doing in this case). It makes it hard to determine the paths to the generated libraries or executables. For instance, if I had a custom command which just copied the executable to another directory
set(EXE_PATH "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/exeName${CMAKE_EXECUTABLE_SUFFIX}")
set(NEW_EXE_PATH "${RUN_UNITTESTS_DIR}/exeName${CMAKE_EXECUTABLE_SUFFIX}")
add_custom_command(TARGET unitTests POST_BUILD
COMMAND ${CMAKE_COMMAND} ARGS -E copy "${EXE_PATH}" "${NEW_EXE_PATH}")
it's going to choke on Windows, because the executable isn't really in CMAKE_RUNTIME_OUTPUT_DIRECTORY. Depending on the configuration type, it's in either ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Release or ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Debug. On Linux, that could be trivially fixed by using CMAKE_BUILD_TYPE and adding it to the path, but that doesn't work with Windows, because on Windows, cmake generates multiple configurations rather than just one. So, what I'd like to be able to do is something like
add_custom_command(TARGET unitTests POST_BUILD
debug
COMMAND ${CMAKE_COMMAND} ARGS -E copy "${DEBUG_EXE_PATH}" "${DEBUG_NEW_EXE}")
add_custom_command(TARGET unitTests POST_BUILD
release
COMMAND ${CMAKE_COMMAND} ARGS -E copy "${RELEASE_EXE_PATH}" "${RELEASE_NEW_EXE}")
and some cmake commands see to be able to do that (e.g. target_link_libraries), but as far as I can tell, add_custom_target doesn't provide that capability. So, the question is how I would do that? How can I make a custom command be configuration-specific on Windows?
It could be solved with the help of the next "generator expressions" (CMake 2.8.10):
$<0:...> = empty string (ignores "...")
$<1:...> = content of "..."
$<CONFIG:cfg> = '1' if config is "cfg", else '0'
You can combine them to reach behaviour that you need (pseudocode):
if debug then ${DEBUG_EXE_PATH} elseif release then ${RELEASE_EXE_PATH}
which translates to:
$<$<CONFIG:debug>:${DEBUG_EXE_PATH}>$<$<CONFIG:release>:${RELEASE_EXE_PATH}>
So your string will look like:
add_custom_command(TARGET unitTests POST_BUILD
COMMAND ${CMAKE_COMMAND} ARGS -E copy "$<$<CONFIG:debug>:${DEBUG_EXE_PATH}>$<$<CONFIG:release>:${RELEASE_EXE_PATH}>" "$<$<CONFIG:debug>:${DEBUG_NEW_EXE}>$<$<CONFIG:release>:${RELEASE_NEW_EXE}>")
Details: CMake:add_custom_command
This is a case for the generator expressions provided for use with add_custom_command.
In your case you want the full path to your compiled exe, and also its filename to append to your destination directory. These are $<TARGET_FILE:unitTests> and $<TARGET_FILE_NAME:unitTests> respectively.
Your full command would be:
add_custom_command(TARGET unitTests POST_BUILD
COMMAND ${CMAKE_COMMAND} -E
copy $<TARGET_FILE:unitTests>
${RUN_UNITTESTS_DIR}/$<TARGET_FILE_NAME:unitTests>)