Cmake link library

Cmake link library. 如果指定的库不存在，CMake 会报错。 中文文档. ) add_library(library2 SHARED. txt [3] && [4] in your lib dirs you should declare static libraries: add_library(core STATIC ${YourSourceFiles}) This approach always worked for me. " Feb 18, 2016 · The CMake documentation starting with version 3. Also, add_library() specifies you are trying to compile glfw3 by yourself, but what you tried doing is to only link with it. Why quotation marks? CMAKE_LINK_LIBRARY_FILE_FLAG ¶. a" [pre/post]fix to the lib filename. In CMake terms, the library businesslogic specifies usage requirements (the include path) that every consumer of our library (the application) has to satisfy. And to finish, specify paths with slashes ( CMake standard for paths) rather than backslahses. We have an executable target myapp. c++ gcc/g++ oepnCV Ubuntu 画像処理. List of direct link dependencies. Both of the following conditions must be met for this variable to have any effect: The associated CMAKE_LINK_LIBRARY_USING_<FEATURE>_SUPPORTED variable must be set to true. 3. add_library(link-to-all a. lib on Windows. CMake link_directories() コマンド. From the book "Mastering CMake". If this were a system dependency, I could just call find_package() - but the packages weren't installed on the default search path. Projects and users have the flexibility to choose between methods that best suit their needs. By default linking to a shared library target transitively links to targets with which the library itself was linked. – 0x5453. h which I want to add to my CMake project and use in cpp code. Prefer to pass full absolute paths to libraries where possible, since this ensures the correct library will always be linked. At this point we built the shared library and installed it system-wide, with the help of CMake. Furthermore, the businesslogic static library will become a part of the helloworld executable. Uses <path-to-build> as the build tree and <path-to-source> as the source tree. A library target name: The generated link line will have the full path to the linkable library file associated with the target. I think this has something to do with linux adding "lib***. Peter Mortensen. 16. Repeated calls for the same <target> append items in the order called. target_link_options(my_tgt PRIVATE "LINKER:-as-needed") Note that CMake always passes flags to the configured compiler. txt as follows: For increased 'encapsulation' you could e. This variable defines how to link a library or framework for the specified <FEATURE> when a LINK_LIBRARY generator expression is used and the link language for the target is <LANG> . So, I would keep your Src CMakeLists. Nov 21, 2017 · I have written a library that I used to compile using a self-written Makefile, but now I want to switch to cmake. cmake script file, make sure it's location is part of the CMAKE_MODULE_PATH and write the code for finding the library and header files and constructing the imported target in there. CMakeで外部ライブラリとリンクさせたりするのどうすんのという話。. Mar 30, 2022 · PUBLIC: Any files added after PUBLIC is used for compiling the library and included for any other target that linking to this library. Nov 14, 2018 · It seems this old post is getting a lot of traction. In the Configure your new project page, enter Right-click on the project in Solution Explorer and select “Launch CMake Debugger”: Step to the target_link_libraries() line and check the sqlite3 variable. Doesn't work I: A library target name: The generated link line will have the full path to the linkable library file associated with the target. Here’s my project structure. Flag to be used to link a library into a shared library or executable. CMake provides a number of ways to incorporate such things into the build. 13. IMPORTED_LOCATION is for the runtime one (i. You can overload add_library the same way if required. This is how you add linker flags to a target in modern CMake (3. Oct 25, 2009 · link to pthread library using CMake (in CLion) 4. Talking about distribution the executable or shared library with dynamically linked libraries and CMake build system: SET(CMAKE_BUILD_RPATH_USE_ORIGIN TRUE) This var forces linking with relative path within the build tree, so in result the build directory can be movable. To link it against threads you need to: But the point is to add this "-pthread" option during compilation, not linking. Apr 16, 2024 · Now let's see how this library can be linked to our project. cpp) CMake automatically adds the lib to the front and the . The buildsystem will have a dependency to re-link <target> if the library file changes. The tree looks like this (I removed all the irrelevant files): . CMake Warning (dev) in CMakeLists. The named <target> must have been created in the current directory by a command such as add_executable () or add_library (). As a final step, it’s recommended to create and install a so called pkg-config file. Thank you very much for your responses. sudo apt-get install zlib1g-dev Aug 11, 2014 · Note that _add_executable is an internal CMake name that may break in future CMake versions. For convenience, we will create and use a separate folder for it. lib) should be specified with property IMPORTED_IMPLIB. Assume your project called myProj and the pre-built library myLib. Jul 4, 2021 · How can I link a static library with cmake? The library I'm trying to link is in the project directory lib/lib. Oct 31, 2021 · 14. Mar 29, 2023 · If you're asking about how to link your project to the pre-built static library, you can do like this by calling target_link_libraries. The FindPkgConfig module is also sometimes used, although Oct 25, 2021 · The last parameter(s) is a list of libraries to link, where each item is the name of the library given in add_library. Language-specific flag to be used to link a library specified by a path to its file. I was reading about the cmake keywords PUBLIC, PRIVATE, INTERFACE and came across this paragraph here in the cmake docs. This command is used to find a library. The solutions to linking zlib with CMake are either: To download zlib, if on Linux with. 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. the lib2 is also built wit&hellip; Cmake provides interface library specifically for "header-only library". Link not with the IMPORTED library with given location, but with the library target, created in another project. answered May 19, 2022 at 14:49. txt with the following content. This property is ignored for targets that are not STATIC libraries. Lets name them lib1 and lib2. For this variable to have any effect, the associated CMAKE_<LANG>_LINK_LIBRARY_USING_<FEATURE>_SUPPORTED variable must be set to true. We're linking it with mylib, which is built in its own build tree. h: is a CMake 3. cpp) This should work if GLFW is properly installed. This variable defines how to link a library or framework for the specified <FEATURE> when a LINK_LIBRARY generator expression is used. target on Windows. Generate a Project Buildsystem ¶. This variable is used to initialize the MSVC_RUNTIME_LIBRARY property on all targets as they are created. Try: target_link_libraries(myprogram m) Which asks cmake to link myprogram with libm. If you use this command on linux machine. Use the cmake_policy command to set the policy and suppress this warning. 17. You have to use it like target_link_libraries(ch4 m) to link libm to your target. MyLib contains source for a static library; MyApp needs to link against that library. I ca Jun 12, 2018 · 2018-06-12. And because you have . xxx - is the library name. If the library is external, you might want to add the path LINK_LIBRARIES. We use the option Aug 1, 2010 · To link an executable with a library that resides in a standard location, one can do the following in a CmakeLists. h file of the library lib. project) and include the header like this: Aug 15, 2019 · The target property INTERFACE_LINK_LIBRARIES holds this information. 23 feature. Mar 9, 2022 · Learn how to link a shared library to your C or C++ application, built with the GCC toolchain, using three scenarios: calling GCC directly, building with a Makefile, or using CMake. Mar 5, 2017 · You tell CMake to link you executable against the "Threads" library with the target_link_libraries() command. lib/. Generally, a dependency should be specified in a use of target_link_libraries () with the PRIVATE keyword if it is used by only the implementation of a library, and not in the header files. c) add_executable(myExe myExe. dll, . With the current CMake versions CMake provides full support for transitive dependencies and interface libraries. Sep 23, 2019 · This asks to link lm with the libraries libmyprogram and whatever's contain in ITK_LIBRARIES. I searched a lot and found that in earlier versions there was a problem where you could not link intermediate libraries in the result executable. 18. If it is not, you must either: find_package(m) and then target_link_libraries(myprogram ${M_LIBRARIES}), or Jan 27, 2021 · Easily Create Shared Libraries with CMake (Part 1) When working on a cross-platform C++ or C project, it is easy to get confused by platform differences and scattered information. Unfortunately Apr 21, 2022 · Hi all, am very new to CMake so pardon me if get something wrong. May 9, 2017 · Doing this, however, does not work, and the project ends up not linking (the symbols from the backward-cpp library are not found), unless I link the output executables to the third party library directly, in the root CMakeLists. May 19, 2022 · target_include_directories(mainScr PUBLIC ${GLFW_INCLUDE_DIRS}) add_executable(PackMan scr/main. My CMake files look like this: Algo: CMAKE_<LANG>_LINK_LIBRARY_FILE_FLAG ¶. If you cannot, then using add_subdirectory approach has a little sence - build other project with ExternalProject_Add instead. Probably the term "link interface" came from the old CMake wording used around LINK_INTERFACE_LIBRARIES properties, which is deprecated in favor of INTERFACE_LINK_LIBRARIES. See documentation of the directory and target LINK_OPTIONS properties. Add a library target called <name> to be built from the source files listed in the command invocation. Oct 15, 2012 · 6. file2. txt: Policy CMP0020 is not set: Automatically link Qt executables to qtmain. 1. This property specifies the list of libraries or targets which will be used for linking. This command specifies the libraries or targets your executable or library needs to link against during the build process. I am aware that one cannot link static libraries to other static CMAKE_LINK_LIBRARY_USING_<FEATURE>_SUPPORTED. I'm trying to use cmake (on Linux with GNU make and g++) to build a project with two sub-directories: MyLib and MyApp. You will typically use find_package or find_library, followed by target_link_libraries and likely target_include_directories. 4 on the FindOpenSSL page says: . The optional <type> specifies the type of library to be created: An archive of object files for use when linking other targets. CMake: target_link_options () Overview. Actually, I have successfully solved it in 3 hours after i posted this question. PUBLIC/INTERFACE/PRIVATE # pick one. INTERFACE ${CMAKE_SOURCE_DIR}/lib) Nov 3, 2016 · Configuring done. c) target_link_libraries(myExe PRIVATE miLib) # typo for myLib In order to link toolchain-provided libraries by name while still enforcing LINK_LIBRARIES_ONLY_TARGETS , use an imported Interface Library with the IMPORTED_LIBNAME target property: Mar 9, 2020 · How to make a header-only library with cmake? Like this: add_library(project INTERFACE) target_include_directories(project INTERFACE . so by running ldd again: Jan 5, 2017 · target_link_libraries(main bingitup) bingitup is the same name you'd give a target if you create the static library in a CMake project: add_library(bingitup STATIC bingitup. Their locations are computed relative to the file location so that the install tree may be easily moved. List public interface libraries for a library. Dec 10, 2020 · Dec 10, 2020 at 14:29. Oct 29, 2019 · You can either construct such an imported target manually in the find script, or have CMake do it for you. This flag will be used to specify a library to link to a shared library or an executable for the specific language. so) target_include_directories(externalLibA. Jul 25, 2017 · If all you want is a convenient target for use by others and don't care about whether you have one or multiple libraries, cmake can do that with an interface library: add_library(library1 SHARED. The suffix to use for the end of a library filename, . An interface library can then "link" against other libraries and this interface library can, in turn, be "linked" against. set 'MyLib_INCLUDE_DIRS' there and force it into the May 19, 2020 · Hi @ben. For example, when a C executable links to an imported C++ static library CMake chooses the C++ linker to satisfy language runtime dependencies of the static library. Every user and application can now potentially use the library. どうも、今まで VC++ 書いてきていたので、ライブラリとかをビルドするときにCMakeとか使っていたものの、 Visual Studio のおかげで makefile とかCMakeLists Oct 14, 2023 · How to Link Static System Libraries and Use Static Libraries in CMake If you're using CMake with MSYS2 and you want to compile an executable that can be run on another device without installing dependencies, you may encounter issues with linking static system libraries and using static libraries installed with pacman. Since static libraries do not link to the libraries on which they depend, it is important for CMake to keep track of the libraries so they can be specified on the link line of the executable being created. Select the CUDA runtime library for use when compiling and linking CUDA. 1,690 2 33 79. We know to link to a library, we need its public headers. It will display the path of the library found by CMake: You can double-check that the program produced by CMake no longer has a dependency on libsqlite3. third-party\spdlog\include. See the description of CMP0022, which also uses the term "link interface. The primary methods of bringing dependencies into the build are the find_package() command and the FetchContent module. New in version 3. Run CMake with one of the following command signatures to specify the source and build trees and generate a buildsystem: cmake [<options>] -B <path-to-build> [-S <path-to-source>] New in version 3. Let me demonstrate a possible solution on a concrete example: The myapp project. This implies libm is installed in a system directory. It expects a semicolon-separated list, where each list item has the following form: feature[,link-item]*. Follow the steps to install, build, and link a shared library with CMake, using the libconvert example unit conversion library. CMAKE_<LANG>_LINK_LIBRARY_FLAG. The allowed case insensitive values are: Link with -cudart=none or equivalent flag (s) to use no CUDA runtime library. If you used to compile and run "core" and "SDL2" as standalone binaries, perhaps you will have to reorganize them a little bit. lib1 gets built along with its test just fine. This property contains the list of transitive link dependencies. You don't really need a find_library. The flag will be used before a library file path is given to the linker. The better cross-platform way would be using find_package, which locates a package/library, and provides the libraries and includes in CMake variables so that you could link your program to them. Dec 30, 2020 · 19. Git clone the spdlog repository into the include directory with the name spdlog. dll, the imported library must be of type SHARED. Jan 25, 2021 · The good way to do it is to define respective target which will represent library. The named <target> must have been created by a command such as add_executable() or add_library() and must not be an ALIAS target. ├── include │ ├── These items will be added to the link command. txt: CMAKE_CUDA_RUNTIME_LIBRARY. These options are passed to the linker during the linking stage of the build process, influencing how the target is linked with other libraries and object files. 2k 22 109 132. Copy libcmake_testapp_lib. In CMake, the target_link_options() command is employed to specify linker options for executable, shared library, or module library targets. CMAKE_<LANG>_LINK_LIBRARY_FILE_FLAG. Feb 16, 2015 · 10. Looking around the net you will see many people recommending (sometimes strongly) against using link_directories (). Jan 26, 2022 · The windows link library (i. In the first case, create a FindPower. For an executable with exports (see the ENABLE_EXPORTS target property) no default transitive link dependencies are used. INTERFACE_LINK_LIBRARIES. List public interface libraries for a shared library or executable. Situations where a library search path may be needed include: 可以使用 find_library() 函数来查找库的路径。 错误. The . 2. You need to found this target in the other project's CMakeLists. Note, that variable PROJECT_NAME is set by CMake. But in order to use the latter two, you need a target to be a client of the library, e. 0) it seems to work with all versions though. Linking ensures that the symbols and code from these dependencies are incorporated into your final executable or library. h. link_directories() コマンドは以下の形式で記述します。 Aug 1, 2016 · What does work is this CMake script: add_library (myLib SHARED $ {SOURCE_FILES}) set (CMAKE_EXE_LINKER_FLAGS " -static") target_link_libraries (myLib -static-libgcc -static-libstdc++) This must be the wrong way of doing this, to my knowledge -static-libgcc and -static-libstdc++ are linker options and not libraries Portable CMake solution. txt file ( add_backward(MainExecutableA-Z) ). I'm still looking for a good solution myself to be able to compile binaries "as static as possible", but I've found no elegant solution yet. Using pthread lib in C with Cmake. This is done based on GLFW documentation - didn't test this. target_link_libraries() 函数是 CMake 中一个重要的函数，用于指定目标依赖的库。它可以链接静态库、动态库和 Specify libraries or flags to use when linking a given target. CMAKE_LINK_LIBRARY_SUFFIX¶. so" at the paths mentioned in LINK_DIRECTORIES () macro. txt. . This command can be used to add any link options, but alternative commands exist to add libraries ( target_link_libraries() or link_libraries() ). From the filtered list of project types, select Dynamic-link Library (DLL), and then choose Next. The named target must be created by add_library() within the project or as an IMPORTED library . LINK_INTERFACE_LIBRARIES. Here's how to do this for boost , for example. cpp) Select the MSVC runtime library for use by compilers targeting the MSVC ABI. Jun 15, 2011 · I want to call target_link_libraries() on the library that was just downloaded, but the path to the library will vary by system. I have a . If the library is found the result is stored in the variable and the search will not be repeated unless the variable is cleared. To accomplish this we need to add BUILD_SHARED_LIBS to the top-level CMakeLists. On most compilers this is -l. 5. 13+): # my_tgt can be an executable, library, or module. Try adding your lib/glfw/lib directory to your link_directories() just as you do with your include_dicrectories(). 24. CMake 官方文档提供了中文翻译：[移除了无效网址] 总结. At the top of the dialog, set Language to C++, set Platform to Windows, and set Project type to Library. (Assuming if they are found they will be used) Mar 27, 2022 · CMakeではtarget_link_librariesを使ってターゲットに必要なライブラリをリンクさせることができます。 target_link_libraries ( <target> PUBLIC -lboost_program_options ) 実際は、ライブラリを直接指定せずに、 find_package を使ってライブラリの情報を取得し、 target_link_libraries に Mar 19, 2021 · Below is a simple CMake project. e. The value of this property is used by the generators CMAKE_<LANG>_LINK_LIBRARY_FLAG ¶. cpp) target_link_libraries(generate_mesh OpenMeshCore) CMake link shared library built from object libraries. Jan 18, 2022 · Generally, target_link_libraries does the job, but the CMake build system needs to know about the target you're linking. link_directories() コマンドは、CMake でプロジェクトをビルドする際に、リンカがライブラリを探すディレクトリを指定するために使用されます。 使用方法. The value of this property is used by the generators to set the link libraries for the compiler. a and the only source file is main. Line 4 references the imported MathFunctions library. Cmake: How to statically link packages to On the menu bar, choose File > New > Project to open the Create a New Project dialog box. cmake won't build a Linux c++11 cross-compiled program with pthreads. The suffix for libraries that you link to. Jan 31, 2018 · I am using CMake 3. I'm trying to build on Linux with generated makefiles using the following CMakeLists. Flag to be used to link a library specified by a path to its file. CMAKE_LINK_LIBRARY_FILE_FLAG. ) Then in the target that uses the library: target_link_libraries(dependee. txt file: create_executable(generate_mesh generate_mesh. Add the following commands to link this library to the cmake_testapp Although we only exported a single target, this file may import any number of targets. ¶. Apr 1, 2015 · target_link_libraries(<targetname> ${YOUR_CMAKE_VARIABLE}) The same variable can also be used to create your copy commands (for example using this custom target ) (*) A similar question was asked here , and it got no definitive answer. This variable is used to initialize the CUDA_RUNTIME_LIBRARY property on all targets as they are created. In CMake, we use TARGET_LINK_LIBRARIES () to link a shared library to an library/executable. The allowed values are: MultiThreaded. The find_library() command provides the full path, which can generally be used directly in calls to target_link_libraries(). 10 and have a problem linking a compiled library to a test executable in CMake. The usage is as follows: If the language-specific CMAKE_<LANG>_LINK_LIBRARY_USING_<FEATURE>_SUPPORTED variable is true, the feature Apr 25, 2018 · PPP. Set OPENSSL_USE_STATIC_LIBS to TRUE to look for static libraries. The first argument must be a target. CMake accounts for these languages when computing how to link a target to the imported library. For more information on the scope, check out this section on target_include_directories in CMake . In addition to accepting values from the target_link_libraries() command, values may be set directly on any target using the set_property() command. a is in inlcude/library. Jan 6, 2016 · Unlike libc, which is automatically linked, libm is a separate library and often requires explicit linkage. A cache entry, or a normal variable if NO_CACHE is specified, named by <VAR> is created to store the result of this command. file1. CMake should be able to figure out the dependency between Src and Tests automatically, provided of course you call CMake only on your root CMakeLists. Dec 9, 2019 · 1. a at the end on Linux, and . In this case you would replace set_property(TARGET myTool PROPERTY CXX_STANDARD 11) with target_compile_features(myTool PRIVATE cxx_std_11) Sep 22, 2020 · Hello everyone, hope you are having a great time. Create third-party\spdlog\CMakeLists. I was not able to tell if this was resolved or still an issue. For example: TARGET_LINK_LIBRARIES(ExecutableName xxx) where ExecutableName - is the name of executable. CMAKE_LINK_LIBRARY_USING_<FEATURE> The value used for each of these variables is the value as set at the end of the directory scope in which the target was created. In this section we will show how the BUILD_SHARED_LIBS variable can be used to control the default behavior of add_library() , and allow control over how libraries without an explicit type ( STATIC , SHARED, MODULE or OBJECT) are built. The target_link_libraries command takes care of that. Language-specific suffix for libraries that you link to. boeckel, Sorry for my late response because I was distracted on another task. PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libA. visa. g. As of my understanding CMake searches for "libxxx. lib, and . I would suggest to do the following: Create a file structure like the following. 0. Dec 10, 2020 at 14:31. Finally, in your CMakeLists. Create a lib directory under the project root. The remaining arguments specify library names or flags. via add_executable. A dynamic library that may be linked by other targets and loaded at runtime. Apr 30, 2019 · Just a note: The more modern way to specify the language version for a target in cmake is to use the target_compile_features() command. Run "cmake --help-policy CMP0020" for policy details. On Windows, the compilation is successful as well, main doesn't give any output, though. This can be used to resolve incompatible library features that result from specifying different features for the same library in different LINK_LIBRARY generator expressions. This warning is for project developers. I’m trying to create a test executable out of a library I made. The INTERFACE, PUBLIC and PRIVATE keywords are required to specify the scope of the items that follow them. add_library (another STATIC another. Compile with -MT or equivalent flag (s Feb 23, 2022 · Create and install the shared library’s pkg-config file with CMake. FILE_SET HEADERS BASE_DIRS ${PROJECT_SOURCE_DIR} FILES square. The linker presumes all libraries to begin with lib, so to link to libm you link to m. It is also propagated by calls to the try_compile() command into the test project. External projects that have more idiomatic C++ support will support the find_package(<package_name>) command, which populates information about where to find these targets. Here is an example to demonstrate how: # Library to be linked to all targets. Jan 22, 2013 · I think it's CMake's default behavior to not link project2 to the external library, but to link both libraries to the executable. The resulting build system will link to the library from its installed location. lib, you can it do like this: target_link_libraries(myProj myLib) edited Mar 29, 2023 at 11:45. As of now (version 3. On Linux, everything compiles, and running main gives expected output. Thus, to forward your intended link flags to the linker, you must use the LINKER: prefix. So, for example lets say your program is called test. Sep 21, 2010 · AFAIK that's a bit tricky, because CMake, more precisely the find_library command, prefers shared libs and finds those if both shared and static are available. cpp another. On Windows you can use vcpkg to manage c++ libraries. This property supports overriding multiple libraries and features. a from its default location, which is cmake-build-debug, to the lib folder. And if find_package () does not work for you, the next best option would be find_library (PROTOBUF protobuf /usr/lib/x86_64-linux-gnu) and then use $ {PROTOBUF} in your target_link_libraries () command. PRIVATE and PUBLIC items will populate the LINK_DIRECTORIES Oct 2, 2019 · While your executable e3 will initially be set to link with all libraries, you can remove one (or multiple) libraries from the list using a combination of get_target_property() and set_property(). CMAKE_<LANG>_LINK_LIBRARY_SUFFIX. Adding resources set(CMAKE_LINK_LIBRARIES_ONLY_TARGETS ON) add_library(myLib STATIC myLib. dll). cpp. add_library(externalLibA SHARED IMPORTED) set_target_properties(externalLibA. lib at the end on Windows. 31. Writing, compiling, and using shared libraries in a cross-platform manner with a modern build system is one of the most common problems in development. How to link a shared library with CMake with relative path. This is needed only on very few platforms. It takes a target ( another ) and adds a dependency if a target is given. h) target_link_libraries (another PUBLIC one) target_link_libraries is probably the most useful and confusing command in CMake. zc rg ht fr om za fo pi rw zs