Cmake get target dependencies. My best bet is to … Since CMake 2.

Cmake get target dependencies The add_custom_target() is what allows cmake to find your target and execute the corresponding command whenever one of the source files (a. If a you want to influence the linker options, you use target_link_libraries. You specify what you want get done but not how it will be done. ignore files it would be better if all dependencies where build/cmade into the Output/ directory. It happens only on Windows, installing on Linux is ok. Generating Graphviz files¶. The target has no output file and is always considered out of date even if the commands try to create a file with the name of the target. According to the documentation of GET_RUNTIME_DEPENDENCIES, it uses objdump to look at the binaries’ RPATH or RUNPATH and search all resulting paths for the NEEDED libraries. find_package will set up imported targets: targets defined outside your project that you can use with your own targets. iterate over the targets programmatically?. dot . The target_include_directories() command populates this property with values given to the PUBLIC and INTERFACE keywords. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company To add a dependency in CMake targets, you can use the add_dependencies() function in CMake. 42]) target_link_libraries(my_target PUBLIC dependency_target) # for a proper library this also setups any required include directories or other compilation options The hard way. Use file (GET_RUNTIME_DEPENDENCIES) to resolve all depends from system path and PATH envs in the install state. How can I get the list of dependencies of cmake target? 1. "However those tests need functionalities from bar. CMake 3. But I can't find how to do it in CMake. On my local version of CMake, this is notified as a purple "Consolidate compiler generated dependencies of target T" message. CMake: require building of files in addition to building targets. I want to do this within the CMake script. . When you do this, the targets will be recursively found as cmake packages, and all transitive Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company INTERFACE_LINK_LIBRARIES¶. The find_package How can I get the list of dependencies of cmake target? 11. dll library. And, you can nearly do it with CMake 3. Add dependency to the CMake-generated build-system itself. Graphiz requires GUI setup. 3. I've placed the invocation of this custom_target creation almost at the end of my Top-Level-CMakeLists. a file, so I can just ship a big lib file to customers. It works in the way I’d expect RUNTIME_DEPENDENCY_SET to work. Projects may also get and set the property directly. But if modifying existing CMakeFiles. This should be possible for imported targets and for build targets. One work-around is to postpone the generation of the ${target}_ASSETS custom targets until all dependencies have been set up with calls to ADD_RESOURCES. h files into add_executable. txt, i. When using the parallel install, subdirectories added by calls to the add_subdirectory() command are installed independently and the order that install rules added in different subdirectories will run is not guaranteed. --target install either performs. should exist at the call time, should, maybe, have to, definitely not. cmake bin/ thirdparty. For example, when I have multilayered CMake project and some targets are being compiled to different locations. dll I saw the new cmake_langauge(DEFER ) command in CMake 3. e. 11 you can use target_include_directories. At some point, I end up with a, let's say randomly ordered, list of libraries. txt file) CMake automatically brings the other custom command into the target in which this command is built. When a dependency is added with FetchContent, the project can link to the dependency’s targets just like any other target within the project. 24, FetchContent is all you need: its key feature is the This article demonstrates some more recent features of CMake which greatly reduce that pain. I would expect main to link with both object files. On Linux and macOS, it will use the embedded RPATH information, but Windows has no corresponding concept. Here's how you can do it: Open your CMakeLists. While the CMake programs that you write in the CMakeLists. I think you're mixing up two different paradigms here. Targets Scanning dependencies of target touched-two Scanning dependencies of target touched-one [ 50%] Generating touched touch [100%] Generating touched As far as I understand, only targets created with add_executable or add_library can have "main target's output" file. For imported targets ist works, but I am wondering that the version is only available with non namespace target name? add_executable(main main. 2. CMake get sources files list in parent directory. This property specifies the list of libraries or targets which will be used for linking. dll interface. Touch a source file of the dependent target so that it goes out of date. The FetchContent_MakeAvailable() command ensures the named dependencies have been populated, either by an earlier call, or by populating them itself. I want somehow to force the cmake to include all (preferably excluding system libraries) libraries (SOs only) I link with to be included in the installation @Tsyvarev cannot be evaluated to target names, wrong, they absolutely can. Also for . This is done as a We have some libraries that are to be consumed by multiple applications, but with different compile definitions or flags. 11. cmake propagate dependencies using find_package. This day I got bitten by not specifying all definitions which created an API/ABI I always install() all of my custom Find modules into the EXPORTED configuration dir, whether they’re necessary on the platform / for the build or not. You could use get_target_property() to get the LINK_LIBRARIES property list for TargetA and TargetB. I’m setting up an imported library: add_library(Example::LibA SHARED IMPORTED) set_target_properties(Example::LibA PROPERTIES IMPORTED_LOCATION "${LibA_LIBRARY}" IMPORTED_IMPLIB 1 Any target has a collection of properties, which define: how the build artifact should be produced, and. PUBLIC doesn’t mean much for an executable; for a library it lets CMake know that any targets that link to this target must also need that include directory. Works with make -j4. So by launching this custom Yeah I saw that it could be set by that variable, but I was more interested in a way to specify dependencies inside the build. Second, it takes considerable time due to multiple calls to Get a property from a target. 3. dll not exposed to the A. CMake generates native makefiles and workspaces that can be used in the compiler environment of your choice. I use GET_RUNTIME_DEPENDENCIES to figure out which external DLLs I need to add to my application kit. dot file, showing all dependencies in the project INTERFACE_LINK_LIBRARIES¶. Is there a way in the top CMakeLists. txt is an option, there is a workaround. The cmake documentation says the following about the DEPENDS parameter: The DEPENDS option specifies files on which the command depends. Our legacy Perl+Makefile based build system has an option to skip all dependency checks for this use-cases, build the single file that The problem is that add_custom_target cannot produce an output as far as CMake is concerned. But the difficult part, is that the code generation script needs to know what libraries are being used in order to generate the proper code. OBJECT_DEPENDS¶. This property contains the list of transitive link dependencies. dll include/ thirdparty. cmake. COMPILE_DEFINITIONS). add_dependencies should only be used where you need to establish a dependency in the build process that would otherwise not be present. There is no way to add dependencies from the files afterwards. But, for other cases CMake can be instructed to instead relink executables / shared libs using a specific install-target RPATH value. So by launching this custom As of CMake 3. txt target_link_libraries(myLib2 myLib1) But, according to the documentation: Specify libraries or flags to use when linking a given target and/or its dependents. Basically this would be the same list I pass to > target_link_libraries(), minus actual library files with no > corresponding target known to CMake. If it is created within the project an ordering dependency I am trying to install an executable using cmake. We had a look at the GetPrerequisites Module of CMake (2. projectA and projectB. There are known issues with this the scanner. I use target_link_libraries to link 3rd party . Project A depends on projectB. For INTERFACE targets target_link_libraries should be used, even if it doesn't have an effect on the linker options. Get all source files a target depends on in CMake. xml) The created cmake_install still contains a delimited listed surrounded by one set of quotes and fails to understand the directories. 31: Projects can enable INSTALL_PARALLEL to enable a parallel installation. cmake --graphviz=test. @PaulBaltescu The first parameter has to be a proper CMake target built by the current project. If I’m on a server without GUI, I will need to get dependencies from the command line list, so that I can build a huge project one part after the other and it make If I specify a dependency chain of OBJECT libraries in CMake, only the target_link_libraries dependencies of the very last one is used in the target executable. txt file, where the project is specified, to get the list of all targets added by other CMakeLists. This can The add_custom_target() is what allows cmake to find your target and execute the corresponding command whenever one of the source files (a. Finally, here is the main project (a library in my case) that makes use of the file we generated in the step above. In addition to accepting values from the target_link_libraries() command, values may be set directly on any target using the set_property() command. They are internal and private to achieve correct build. Essentially a meta build to build the project and all of its dependencies via the single cmake generate and build command. We use CMake for generating the Visual Studio files of our sources in our SVN. I would like them all to be included in the output . Unfortunately, suggested solution doesn’t fit that well First of all, it lists all dependency DLLs, both project, thirdparty and system ones. This lifts the burden of programming your own dependency detection tricks. 1. CMake generates native makefiles and workspaces that can be used in the compiler environment of Hey, I’ll try my best to describe my issue. Now my tool requires some DLL files to be in the same folder as the executable. A. I am not aware of any method of getting targets properties on already configured build directory. However, it looks like I probably can’t run a cmake script using that, at least in the context of the generator process. add to the end. This is kind of documented here, but basically for every find_package() call you're supposed to add a corresponding find_dependency() call into your configuration file. dll") So when you link a with b, a will get a dependency from the file ${a_DIR}/bin/b. try linking to $<$<CONFIG:Release>:A> in the minimal exampe. The value of this property is used by the generators to construct the link rule for the CMakeGraphVizOptions¶. a foo. Both objA and objB are OBJECT libraries in CMake. g. 1. Like any other generator expression, $<TARGET_RUNTIME_DLLS> is expanded at the end of the configuration process and for a specific configuration. With add_dependencies you can only add target as created by add_custom_target. Right, I tried to explain that already. 4. You would be wise to do that by seperating them into their own directories. txt I have: add_custom_command(OUTPUT foo. " - a test which checks functionality of 2 or more libraries looks more like integrate tests, so Hello! I have two projects. What is the best way to solve these dependencies using CMake? Build OS: Windows 10, Cmake 3. so. The following links would help you: Have you looked at Without keeping track of the dependencies externally using > global or custom target properties, is there a way to obtain the list > of targets that a target depends on? This add_dependencies(<target> [<target-dependency>] Makes a top-level <target> depend on other top-level targets to ensure that they build before <target> does. CMake: Print properties of a target including its dependencies. cmake" and "compiler_depend. However, even with the RUNPATH @Antonio: the page on target_include_directories talks about PUBLIC populating the INTERFACE_INCLUDE_DIRECTORIES property, which is used when you call target_link_libraries: "When target dependencies are specified using target_link_libraries(), CMake will read this property from all target dependencies to determine the build properties of I have a setup where an external tool (cargo) produces a shared library, but it needs to be able to link dependencies generated by CMake. The builtin Graphviz support of CMake. By default linking to a shared library target transitively links to targets with which the library itself was linked. headers) The problem is that you need to make each library export its targets by creating a "proper" configuration file. For example, one of our internal libraries depends on OpenCV, and when I use the find_package command to locate the OpenCV dependency, I can also get the install location of its shared libraries, but then later on when my application links Looking for potential info on how to handle the following case I help maintain a piece of software, and im trying to bring our dependency building into the main cmake project. When I build project A, I get a bunch of linker errors. lib // this is the importlibrary that loads thirdparty. However if you have subdirectories with add_library(SOME_LIB) and then my executable is linked with target_link_libraries(my_project SOME_LIB) those dependecies does not presented. List public interface libraries for a library. 16. projectB depends on system dependencies. cmake Skip to content All gists Back to GitHub Sign in Sign up I have a scenario that I think is very similar to this one: CMake add_custom_command/_target in different directories for cross-compilation, however the solution for that issue isn't working for me. dll B. cmake modules shipped with CMake work flawlessly and are maintained by the CMake developers. I have a custom CMake target which looks like this: add_custom_target(foo ALL DEPENDS subdir/f1 anotherdir/f2 f3) Now, but you can create your own wrapper for add_custom_target and capture the dependencies like this: function(my_add_custom_target) # extract DEPENDS argument set(_MULTI_VALUE_ARGS DEPENDS) I probably did not phrase the problem I have with the implementation in cmake very well. e without having to trawl GET_RUNTIME_DEPENDENCIES or invoke ADD_CUSTOM_COMMAND (directly or indirectly) downstream of the actual linkage. I use FetchContent whenever possible so all my dependencies are subdirectories. Hello, I’ve writtem some install logic and cpack logic for my application. txt // Root CMake file src MyCode. What is the best way to solve these dependencies using CMake? The ideal solution would be as simple as possible (though no simpler) and require I don't know what you're particularly interested in From a conceptual point of view-- I think you're right. For imported targets ist works, Instead of carrying around compiler flags, linker options, header search paths, etc. 12). That does the trick for me. Such dependencies must ensure they define the same namespaced targets in both installed and Even if you get that list during file(GENERATE ), you won’t be able to enumerate even second level - because CMake context is not accessible at that point. The workflow before switching to cmake was to work within the tree containing a subproject and build targets from there. dot option, it produces:. I have this process completed in CMake. An example would be I am using CMake on a linux environment using cmake 2. For an executable with exports (see the ENABLE_EXPORTS target property) no default transitive link dependencies are used. how it should be used by other targets in the project that depend on it. For example, I have library target A, and library target B depends on A. Specifying target dependencies. txt file. Finally, calling make depend does two things: In CMake semantics there is some sort of distinction between "targets" and commands" that is baffling me. Many won’t be used because, like Ben (er other-Ben) said, the decision on Apparently get_target_property() can be called only when configuring a build directory with cmake. Finding all affected targets due to source change in cmake project. On Makefile Generators and the Ninja generator an object file will be recompiled if any of the named files is newer than it. On exit, <prerequisites_var> will contain the list of required shared library files. projectB: cmake_minimum_required(VERSI target_link_libraries - just add your library, as you named it (not a variable) The add_dependencies makes it wait before trying to include the dirs needed. For third party integration, I instruct users to specify the needed include, library paths and definitions. Something like the following: In the subdir CMakeLists. so files that provide them. dll. As you noted, the highly flexible ExternalProject module runs its commands at build time, so you can't make direct use of Project A's import file since it's only created once Project A has been installed. exe'. Use the target_link_libraries function to add the transitive dependency to your The above would expand to OLD_COMPILER if the CMAKE_CXX_COMPILER_VERSION is less than 4. Is there any clues how to solve this problem, or at least how to debug it? For this reason, when A links B as PRIVATE and another target C links A, CMake will still add B to the list of libraries to be linked for C because parts of B are needed by A, but A itself doesn't have that dependency encoded into it. c++; cmake; It’s a bit more complex than that, even — the runtime loader keeps a cache (maintained by ldconfig) which maps between library symbols and the . And I need to sort them considering their dependencies (sorted in build order: a libraries appears necessarily after the libraries it depends on). txt there. cpp COMMAND DEPENDS foo. txt file where you define your target. build_name; exec_program; export_library_dependencies; install_files; install_programs; install_targets; load_command; make_directory In CMake 3. In Visual Studio 2010 there is an option, "Link Library Dependencies", which does exactly this. The cache is normally populated by scanning all of the shared library files in any of the directories configured in /etc/ld. Get the list of shared library files required by <target>. A top-level target is one Some dependencies support being added by either find_package() or FetchContent. What you want is not possible and don’t think in terms of targets generated by CMake. For a large selection of common dependencies, the Find<PackageName>. The problem is that 'install' target may depends only from 'all' (default) target. This property is overridden by the LINK_INTERFACE @donturner You don't have to add . So I have red this topic: Copying dependent DLLs to executable directory? But I can’t use NO, cmake is no good currently. The reason I want to do this is to apply some XCode specific settings to every target . 7 with the same results. Unlike to add_dependencies, which may connect targets creates in different directories, all Hi, I’m trying to make sense of this cmake code in the probably vain hope of cleanly it up a bit: The problem is, I can’t find ‘public_dependencies’ in the I'm modeling dependencies with target_link_libraries, as is done in this blog post. 2. 9) works as follows for dependencies: with a call to add_dependencies you cannot add a dependency which is the OUTPUT of a custom command IOW a (generated) file. txt to make sure all modules have been invoked. Hi, I want to read cmake target dependencies and other details like type/path via the cmake file-api for a SBOM (software bill of materials) tool I’m working on. 19, and I thought maybe I could use that to get a good approximation. If I install my application everything from these dependencies will get installed as well including documentation, header files, cmake scripts and other stuff. macro An example using CMake/CTest to collect runtime DLL dependencies prior to testing - win32-test-with-dlls. You still need to create a library with the source files with add_library and link it to your executable with target_link_libraries. Just simply add in your DEPENDENCY project this function and fill in include directories you want to see in the main I want to get the list of all dependency libraries and their versions of a target. At that time all generator expressions in the targets' properties (like IMPORTED_LOCATION_DEBUG) become known, so CMake is able to traverse linked libraries and collect their properties for calculate list of @Antonio: the page on target_include_directories talks about PUBLIC populating the INTERFACE_INCLUDE_DIRECTORIES property, which is used when you call target_link_libraries: "When target dependencies are specified using target_link_libraries(), CMake will read this property from all target dependencies to determine the build properties of Changed in version 3. When compiled with app-B, we need -DappB. So, before installing. I am trying to install runtime dependencies on linux by calling file(GET_RUNTIME_DEPENDENCIES ) on my build output. It generally works, but it literally installs everything. txt directory and executes the CMakeLists. Moreover I cannot make PUBLIC_/PRIVATE_ HEADER to work. My best bet is to Since CMake 2. A target is the basic element in the CMake DSL. This property is overridden by the LINK_INTERFACE LINK_LIBRARIES¶. I want somehow to force the cmake to include all (preferably excluding system libraries) libraries (SOs only) I link with to be included in the installation Additionally, both projects are built using CMake, and Project A should not need to be installed (via the 'install' target) in order for Project B to use it, as this can become a nuisance to developers. Create CMake target only if dependencies satisified. My real problem here is: how to install the executable and its dependencies. How to add a transitive dependency to a CMake target? To add a transitive dependency to a CMake target, you can use the target_link_libraries function in your CMakeLists. This can be used to derive a list of targets that were imported by a single find_package() call when it is queried before and after the call to find_package(). My project specifies a target A which depends on targets B & C. Instead of adding A's source files to B's source file list, I just want B to depend on target A. Thanks for the reply! Yes, I am aware that add_dependencies() works with targets, and that the usual approach is to pair add_custom_command() with add_custom_target(). LINK_LIBRARIES¶. At that time all generator expressions in the targets' properties (like IMPORTED_LOCATION_DEBUG) become known, so CMake is able to traverse linked libraries and collect their properties for calculate list of I want to be able to deploy different dependencies for different targets to their corresponding paths. It might also be the case that the user has disabled CMake's RPATH handling with CMAKE_SKIP For example, > if I have 3 library targets that depend on each other like this: > > A -> B -> C > > When I ask for the target dependencies for A, I should get a list back > with B in it. However, when attempting to do so, I get no dependency mapping between my targets and I get this warning: CMake Warning: Manually-specified variables were not used by the project: GRAPHVIZ_CUSTOM_TARGETS Like any other generator expression, $<TARGET_RUNTIME_DLLS> is expanded at the end of the configuration process and for a specific configuration. cmake" files deep inside the CMake-generated build system. Fortunately, CMake is very clever at handling dependencies, so your job is pretty easy: libA. List of direct link dependencies. 0. txt in that directory. add_library(b INTERFACE "${a_DIR}/bin/b. This means you can't control the build order of targets. The buildsystem will have a dependency to re-link <target> if the library file changes. The command add_dependencies can add only dependencies between targets. In Makefiles, there is no such distinction: targetname:dependency command i. The add_custom_command cannot use the name of the add_custom_target as a DEPENDS. 19 and after you could create b target for a dll without a lib in a single line:. This function takes two arguments - the target that depends on another target, and the target it depends on. Note, that add_custom_command Hi. CMake is a cross-platform, open-source build system. In tranditional Makefile, we do it with target specific variables: app-A: CFAGS+=-DappA app-A: commonLib app-B: CFLAGS+=-DappB app-B: Sometimes I need to manually take action on the dependencies of my targets. This is what CMake 3. Thanks. 19 introduces: a dependency of INTERFACE library from the file. Local all targets are for building targets included in ALL. I’m in a situation where our current build system uses a script that generates C++ code. Use the add_custom_command() command to generate a file with dependencies. So I find this confusing to use target_link_libraries and I am wondering if there is another "cleaner" way. This property replaces the default transitive link dependencies with an explicit list. Quoting the documentation: List of DLLs that the target depends on at runtime. If any dependency is an OUTPUT of another custom command in the same directory (CMakeLists. I also tried cmake 2. The named target must be created by add_library() within the project or as an IMPORTED library. The usecase I am after is to create a single target codegen at the beginning of CMakeLists that could be My target linked with several libraries using TARGET_LINK_LIBRARIES with PUBLIC keyword, The INSTALL command looks like INSTALL(TARGETS foo DESTINATION ${CMAKE_INSTALL_PREFIX}/bin). The problem is, this custom target depends on the includes of LibraryA and LibraryB. CMake install target dependencies. I need to do some special conditioning on an archive (static library). 21; it looks like SET_TARGET_PROPERTIES doesn’t take generate expressions for IMPORTED_IMPLIB or IMPORTED_LOCATION, and you still need . By default nothing depends on the custom target. By specifying dependencies between targets, you can ensure that they are built in the correct order. For this use-case I’m only interested in the direct dependencies of each target in the build-tree. The list in the variable named <prerequisites_var> should be empty on first entry to this function. Short story: On Linux it does not work as expected so I needed to implement something naiv. k. DIRECTORIES is more needed on Windows than on Linux and Mac because it has no equivalent to RPATH. In fact cmake (at least up to 2. How can I get the list of dependencies of cmake target? 2. I got a project where I use a third party library (Windows). Visual Studio Generators and the Xcode generator @MertMertce -- It internally uses file(GET_RUNTIME_DEPENDENCIES), which uses system tools to ask the compiled binary for the list of dependencies. 21+, the $<TARGET_RUNTIME_DLLS:tgt> generator expression can help copy dependent DLLs to the build tree. Additional files on which a compiled object file depends. in template uses find_dependency() to discover any of those requirements. I ended up creating my own macro that uses a few gen expressions, file(GET_RUNTIME_DEPENDENCIES) and a foreach to install the dependencies. CMake is a declarative build system. 17. The code below does not add the dll files to the package. All of the commands required inside the CMake script can be achieved using execute_process to invoke cmake -E. "copy_script. Adding a subdirectory does not do much more than specify to CMake that it should enter the directory and look for another CMakeLists. If it is created within the project an ordering dependency By default on install CMake strips out RPATHs since they tend to cause issues with installed apps and shared resources are expected to be installed in the shared system library paths. txt file from scratch. h lib/ thirdparty. 8. conf (or, if utilized by the Linux distro, by the drop-in files added to Not sure what do you want to express, but add_library accepts (aside from the first argument) only source files, not targets. CMake is part of a family of tools designed to build, test and package software. Get's all the dependencies right. 5. But not every CMake project supports find_package(). cpp thirdpartydep // Precompiled thirdparty dependency FindThirdPartyDep. The DLL files are in a folder alongsid Adds a target with the given name that executes the given commands. CMake - Getting list of source/header files for various subprojects. Here an example: I want to install one executable that depend on two libraries of my cmake and one 3rdparty (pre-compiled). The code below uses the new GET_RUNTIME_DEPENDENCIES feature but I need to install these runtime dependencies too. a. GET_RUNTIME_DEPENDENCIES has quirks and issues in cmake 3. get_target_property; get_test_property; include_directories; include_external_msproject; include_regular_expression The documentation of each command states the CMake version in which it was deprecated. When performing the population, it will also add them to the main build, if possible, so that the main build can use the populated projects' targets, etc. CMake generates native makefiles and workspaces that can be used in the compiler environment of For a large selection of common dependencies, the Find<PackageName>. If the target property is not found, <variable> will be set to <variable>-NOTFOUND. Please read this link for details. find_package will set up imported targets: targets defined outside your project that you can use with your own MyApp CMakeLists. An example would be Hello, We have a very large code that uses CMake + Ninja which can take quite some time to build. <target> is the full path to an executable file. We have successfully used the following CMake code to get the full path of a CMake target (BINARY) dependency (_libFile) on linux, however we don't get a the full Fortunately, CMake is very clever at handling dependencies, so your job is pretty easy: libA. Without keeping track of the dependencies externally using global or custom target properties, is there a way to obtain the list of targets that a target depends on? This would be the same list of targets passed to `target_link_libraries()`. target_link_libraries(Foo LibraryA LibraryB ) This is working great, but for various reasons I need to use add_custom_target to preprocess to a file through a custom command. cmake --build . Each For a target that is properly setup, all you need should be something like that: find_package(dependency [VERSION 1. So the CMake script (called e. Instead of immediately adding the dependencies to the custom target, the macro ADD_RESOURCES has to record the dependencies in a global variable, whose name depends on the target:. 21 introduced the directory property IMPORTED_TARGETS that can be used to get a list of all imported targets. cpp) target_link_libraries( main dependency Each <item> may be:. Hello! Like some other developers, I need to copy external dependency DLLs to executable’s directory. Other options are PRIVATE (only affect the current target, not dependencies), and INTERFACE (only needed for dependencies). In your case, I suggest the creation of a custom target and, for each created target not in ALL, add a dependency to this custom target. 7 CMake - install third party dll dependency. My target linked with several libraries using TARGET_LINK_LIBRARIES with PUBLIC keyword, The INSTALL command looks like INSTALL(TARGETS foo DESTINATION ${CMAKE_INSTALL_PREFIX}/bin). For adjust dependencies between targets, use target_link_libraries or add_dependencies. Is there a way to get from CMake information about why it rebuilds a particular target at build time? For example, GNU Make has the --debug command line option: Considering target file 'foo. The superpower of FetchContent#. When running CMake with the --graphviz=foo. To say it in a different way - I'd like this target (say lint) to run after all the libraries and applications were built. cmake") would be something like: When this sort of system starts involving more complex inter dependency of the libraries, it starts to be impossible even if the dependencies are acyclic. dependency) changes; notice the DEPENDS definition. I have stumbled upon an use case where I think this might come handy, but I am not sure if possible in current CMake. dll is a dependency of A. The command add_subdirectory in CMake language does only one thing – takes the directory path relative to the current CMakeLists. But, It does have the nice benefit of making the files show up in Visual Studio projects in the expected location. in CMake variables, you can now attach that information directly to the targets themselves and CMake offers two distinguished methods to deal with pre-built packages and source dependencies: the find_package command and the FetchContent module. Also, add_dependencies does not seem to be transitive. The ideal case to deploy shared libraries via cmake is to use targets' properties. If the target property was defined to be an INHERITED property (see define_property()), the search will include the relevant parent scopes, as described for the define_property() command. I have to debug this issue, or write new a CMakeLists. We deliberately made the decision to not consider the PATH variable in file(GET_RUNTIME_DEPENDENCIES), Read more on those in my CMake targets article before you proceed. In subdir/CMakeLists. According to the documentation target_link_libraries, add_dependencies concepts was ideologically split. I have tested this in a sample workspace and it seems that the file-api produces a mix of direct and indirect Each <item> may be:. This is of course old style "in source tree" build thinking but it should still be possible in principle. If a generator expression contains spaces, new lines, semicolons or other characters that may be interpreted as command argument separators, the whole expression target_include_directories adds an include directory to a target. You could try use PUBLIC keyword when link libraries: target_link_libraries(library_bar PUBLIC For a target that is properly setup, all you need should be something like that: find_package(dependency [VERSION 1. Also note that order of sources compilation have nothing to do with your problem. Furthermore, and the more serious issue, not all generator exprression are valid in add_custom_command. From a CMake documentation point of view-- You should prefer make so to guarantee the correct build order. lib A. All files, from which a custom target depends, should be specified in the DEPENDS option for add_custom_target() call. This is determined by the locations of all the SHARED and MODULE targets in the target's transitive From what I can tell, generating a dependency graph with custom targets is supported as of CMake 3. lib/. 21 Is there a way to get all targets of a CMake project from within the top level CMakeLists. However some binary targets are always rebuilt and it takes valuable time. I’ve checked this topic. txt files in the directories added using Hi there, I’m trying to make a simple OpenCV Linux application but it works only on OpenCV installed OS, so I wan’t to copy all of it’s dependencies into build folder via cmake to make it also work on the other computers as well without installing opencv on them. All other targets (including the one created by ExternalProject_Add) has no such file, so you need to explicitly depend from the code generator using DEPENDS parameter for add_custom_command. Move lines 8-15 of the example to the end of the Various download methods are supported, including archives and repositories. We sometimes find ourselves doing printf style debugging within the code which can trigger rebuilding of large portions of the code. But when I use GET_RUNTIME_DEPENDENCIES to install my dll, there is no dependency found. The value of the property is stored in the specified <variable>. I am building a static library in CMake, which is dependent on many other static libraries. 11 and later have added some very useful features which make specifying dependencies between build targets much simpler and more robust. The software is multi platform, covering Windows, Android, CMake is a cross-platform, open-source build system. However, I was asking specifically about the editable property. For example, when compiled with app-A, we need -DappA. Then, my PackageNameConfig. You can also use add_dependencies() to specify dependencies manually. There is some specifics about non-keyword target_link_libraries: according to documentation, this call provides transitive linkage by default, but in some cases this transitiveness can be lost. CMake is used to control the software compilation process using simple platform and compiler independent configuration files. If you are using CMake to control your builds, then versions 2. When the target is linked into another target using the target_link_libraries() command, the libraries listed (and recursively their link interface libraries) will be provided to the other target also. Thus it requires additional filtering. The code could look something like this: I'd like to have one specific target be dependent on all the other added targets in my project. dll thirdparty_dep2. When you use target_link_libraries() function and pass it other target name, CMake automatically sets this target as a dependency. 0. Not many developers know that, since CMake 3. Minimal Example: main depends on objB, which depends on objA. CMake can generate Graphviz files showing the dependencies between the targets in a project, as well as external libraries which are linked against. The value of this property is used by the generators to construct the link rule for the @lucmobz: Just tried: app perfectly uses headers from include directories of library_foo. Since reading lots of small files can be very slow, they are consolidated onto "depend. So, how do I setup a dependency for the post-processing steps? I don't want to run these steps unless the external Make actually updated its target. h foo. My current setup looks like this: add_custom_target(${target_name} ALL COMMAND ${CMAKE_COMMAND} ${env_args} ${cargo_cmd} --crate-type=cdylib -- # This needs to contain `-l`/`-L` arguments Use a script which builds all the dependencies; Make a cmake target which does something similar; Something else; And what if a dependency has another dependency which needs to be build as well. Linux rarely needs DIRECTORIES (and warns you if it finds something in a DIRECTORIES argument), and on Mac it isn’t even used at all. If lib is in the list of first-level link dependencies, then you can add the compile definition to lib. target_include_directories(${target} PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include") This will tell CMake that it must also include the headers for libA to the other projects that need it. If you want to include Project A's import file, you'll have to install Project A manually before invoking Project B's I currently try to write a custom_target to print out properites of a target (e. While you may remove 'install' -> 'all' dependency (by setting CMAKE_SKIP_INSTALL_ALL_DEPENDENCY variable), you may not add another dependency for 'install'. Generator expressions are typically parsed after command arguments. This could work with the simple case you've laid out, assuming lib is another target created within the same CMake build tree. Visual Studio Generators and the Xcode generator Additionally, both projects are built using CMake, and Project A should not need to be installed (via the 'install' target) in order for Project B to use it, as this can become a nuisance to developers. Makefiles uses the internal cmake -E cmake_depends to generate dependencies from the source files (header files in add_executable are skipped). 2 so an answer to your question will depend on the build platform. When target dependencies are specified using target_link_libraries(), CMake will read this property from all target dependencies to determine the build properties of the From the OP: i. It doesn't. Sure, I can’t follow generator expressions, but could at least get those explicitly defined dependencies. I don't think there's a way to specify dependency between 2 external libs like this. It is a waste of bytes. What’s worse is that you have to bypass the package I want to get the list of all dependency libraries and their versions of a target. Is it possible at all to get dependecies (ie. dll thirdparty_dep1. Use the Output. txt files are executed in a pure imperative way, the build system that they build is declarative. I have a huge CMake project with lots of libraries. A library target name: The generated link line will have the full path to the linkable library file associated with the target. . Whitespace And Quoting ¶. Specifies a semicolon-separated list of full-paths to files on which any object files compiled from this source file depend. You can use CMake's "dependency graphs generator". lib file to my . It seems to work for simple cases. My point is that CMake’s package config generation functionality provides absolutely nothing to help there, yet it could (and should) since CMake knows all about the synthesized/imported target (albeit only in the build environment and not necessarily the deployment one). kbbgo dnxy kkdiu dnvusm rnmj iawggif gdovwi gday slr gzedlr