A parent repository collects coordinates all this using a bunch of FetchContent commands. In one subproject I define a library target that C and Fortran sources and links against all bunch of library dependencies. It compiles projects with compilers like GCC, Clang, Intel, MS Visual C++. 395.41K views September 10, 2022 C# cmake multiplatform shared-libraries. CMake CMake cmake_minimum_requiredinclude_directories target_include_directories add_executable add_library target_link_libraries add_subdirectory aux_source_directory . cmake_minimum_required (VERSION 3.8) project (Example) add_subdirectory (MyStaticLibrary) edit2: Demo CMakeLists add_executable (Demo $ {Headers} $ {Source}) target_link_libraries (Demo $ {blahblah} $ {Library}) Library CMakeLists add_library (Library blahblah.cpp blahblah.h foo.cpp foo.h) c++ cmake Share Improve this question You can move the executable and the shared library, remove the original build directory and you will still be able to launch your app. Here's an example. That means that Lib does not know where App will generate its executable. To accomplish this we need to add BUILD_SHARED_LIBS to the top-level CMakeLists.txt. By default, when build binaries (libraries and executables), CMake assigns to them those RPATH, which exactly equal to the directories with the linked libraries. Provide details and share your research! As a result, the project will look like this. CMAKE: Build executable and library and link them. You need your sources because generally you build something (a library or an executable) that requires linking to some library that already exist. @Loic-B said in CMake - Linking against a shared library using Qt6:. When you launch ldd to check your app shared library dependencies, it always prints absolute paths. The dll must be in your PATH (or one of the known directories) when you run your program then. First, showing the problem: libtest.h: void hello_world (void); libtest.c: #include <stdio.h> void hello_world (void) { printf ("Hello world, I'm a library!\n"); } hello.c: But if you are using the -rpath oprtion together with the $ORIGIN variable, everything will work as you expect. : For sake of simplicity, in this article I am not covering C++20 modules, link-time optimization, or import libraries. But you can still add -pie if you like. [Solved]-How to link shared library *dll with CMake in Windows-C++ score:10 Accepted answer Although this question is old. (Main main.cpp) target_link_libraries(Main PUBLIC SHLib) SHLib/CMakeLists.txt. install (TARGETS myapp RUNTIME DESTINATION bin) #Creating distribution package: include (InstallRequiredSystemLibraries) include (CPack) . In a different repository, I have a target executable that contains C++ sources which links against the first library. you also got 2 add_executable lines there, bad ! This will install and place in /usr/lib. berak (Jun 8 '18) edit. CMake utilizes build-systems such as Ninja, Linux make, Visual Studio, and Xcode. You only need one call to target_link_libraries () to link all of your *.so libraries to the executable. which means that you should specify the sources of YOUR library as second argument to add_library() or add_executable() and not the library that is already compiled. The shared libraries are not built into your executable (that's one of the main reasons why they came into existence in the first place!). You can see the shared libraries needed by your application by running: $ ldd ./app on the command line. Download the shared library Run these command to download the latest development version of libconvert from the GitHub repository: mkdir ~/libconvert && cd ~/libconvert wget -O - https://github.com/pragmaticlinuxblog/cmake_c_lib/tarball/master | tar xz --strip-components=1 This is because Lib and App have different BINARY_DIRs and Lib must create its target before App calls target_link_libraries (). When you run your app, the drynamic linker/loader ld.so loads the necessary libraries. Note The target_link_libraries () command should be preferred whenever possible. Using PROPERTY POSITION_INDEPENDENT_CODE should only do the former, or, as the last poster there says, it should do it for executables -- and a shared library in a cmake context is not an executable. For an executable with exports (see the ENABLE_EXPORTS target property) no default transitive link dependencies are used. That means you need to link to the associated "libabcd.lib". There is also BUILD_RPATH property for per-target tuning. Therefore, any target_link_libraries () call should be placed after the add_executable () call in your code. Splitting CMake sources into modules; See the target_link_libraries () command for meaning of arguments. All of them compiled in Release . In the main CMakeList.txt add _executable (test main.cpp) link _directories (/usr/lib/x86_64 . Shared library files usually have .dll (Windows), .so (Linux), or .dylib (macOS) extensions. Cmake "link\_directories". add_library( SHLib SHARED foo.h foo.cpp ) add_compile_definitions(LIBRARY_EXPORTS) target_include . Also I link few shared libs to the same executable. This is an example linking SDL2. CMake1.4 CMake-add_executable() . Or you can give it a full path to a library. I have a CMake project with two libraries (static lib1 and shared lib2) and an executable (app).I want lib1 to be privately used in lib2 and lib2 to be used in app, so I wrote this: # lib1/CMakeLists.txt add_library(lib1 STATIC lib1.cpp) target_include_directories(lib1 PUBLIC include_dir) # lib1.h resides in include_dir/ # lib2/CMakeLists.txt add_library(lib2 SHARED lib2.cpp) target_link . Or a linker flag. You don't export the library as needed and described here. cmake Cannot specify link libraries for target " XXX XXX " which is not built by this project. $ sudo make install [100%] Built target PrimeUtil Install the project. There are some cases where CMake may ask the linker to search for the library (e.g. add_executable (aten_libtorch aten_min.cpp) add_library (torch SHARED IMPORTED) # The next line hard-codes the library path and file name in the executable set_target_properties (torch PROPERTIES IMPORTED_LOCATION $ {ATEN_LIB_DIR}/shared/libtorch_cpu.so) target_link_libraries (aten_libtorch torch c10) 3# Make the library available system wide. cmake_minimum_required (VERSION 2.8) project ( main ) find_package ( OpenCV REQUIRED . It takes a target ( another) and adds a dependency if a target is given. Root CMakeLists.txt The main CMakeLists.txt will contain the connection of all subdirectories. setting the following at the top of your > cmakelists.txt: > > if (not cmake_runtime_output_directory) > set (cmake_runtime_output_directory "$ {project_binary_dir}/bin") > endif () > if (not cmake_library_output_directory) > set (cmake_library_output_directory "$ {project_binary_dir}/lib") > endif () > if (not cmake_archive_output_directory) > 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. For example: edit: On root CMakeLists.txt those 2 are added as -> add_subdirectory (Library) add_subdirectory (Demo). You are targeting the link library wrongly. But in src folder i have . target_link_libraries is probably the most useful and confusing command in CMake. If Lib is a SHARED target, I cannot set its RUNTIME_OUTPUT_DIRECTORY to be the same as App's. /usr/lib/libfoo.so becomes -lfoo ), such as when a shared library is detected to have no SONAME field. If you don't like those RPATH, then just assign CMAKE_BUILD_RPATH variable to the list of desired RPATH. Shared library code by default requires -fPIC, but it does not require -pie. -- Install configuration: "" -- Installing: /usr/lib/libPrimeUtil.so -- Up-to-date: /usr/local/include/primeutil.h berak (Jun 8 '18) edit. On windows you don't link the shared object but the import library. src main.cpp CMakeLists.txt . CMake is a cross-platform software for building projects written in C, C++, Fortran, CUDA and so on. Specify libraries or flags to use when linking any targets created later in the current directory or below by commands such as add_executable () or add_library (). .so target_link_libraries() add_executable() add_library() add_executable() add_library() CMake .so CMakeLists.txtadd_executabletarget_link_libraries. I externally compiler licensecc_static.lib as static library and I'm trying to link it to executable. Do you have an idea from what it could come from ? They way it's being done now is that in a given directory, a shared library is created as: add_library (mylibDirA SHARED <local source files> ) then it's added to the mylibA target: target_link_libraries ( mylibA PRIVATE mylibDirA $<TARGET_OBJECTS:mylibDirA> ) Why you ask? A.lib A.dll B.dll B.dll is a dependency of A.dll not exposed to the A.dll interface. I had rerun cmake but I sill have undefined reference even if with this CMakeList. INCLUDE_DIRECTORIES (/path/to/headers) ADD_EXECUTABLE (TARGET target.c) TARGET_LINK_LIBRARIES (TARGET_FILE "-L/path/to/shared/library" SHARED_LIB_name) Which is indirect including library search path flag. 0. user680891 September 6, . I don't understand where it can appear at all when linking .exe, I connect the static libraries IMGUI and IMGUI_GLFW to Core 1 time, the Core - shared library and it is added as a target_link in the root directory, from where the conflict between Core and IMGUI is created, if IMGUI to .the exe is not linked 2 times for sure : In reality, unless used, global symbols in static libraries may be optimized out by the linker. Creates an Object Library.An object library compiles source files but does not archive or link their object files into a library. The buildsystem will have a dependency to re-link <target> if the library file changes. Instead other targets created by add_library() or add_executable() may reference the objects using an expression of the form $<TARGET_OBJECTS:objlib> as a source, where objlib is the object library name. From a Simple Executable to Libraries; Introduction; Compiling a single source file into an executable; Switching generators; Building and linking static and shared libraries; Controlling compilation with conditionals; Presenting options to the user; Specifying the compiler; . target_link_libraries (test2 library.dll) is wrong. List public interface libraries for a shared library or executable. After "cpack -G TXZ", I only find "myapp" in the bin subfolder of the generated package. bambo09 (bambo09) January 10, 2022, 8:34am #3. What else should I do to . src build . You can pass -R <path> to the linker when building your binary, which will add <path> to the list of directories scanned for your shared library. I found another workaround, to mention path where the library is present while linking lib to the executable file. sharedmoduledlopen-build_shared_libsstaticshared By default linking to a shared library target transitively links to targets with which the library itself was linked. Linking a shared library to an executable using CMAKE. I got a project where I use a third party library (Windows). pro tip: mark your code with mouse, and press ctrl-k here, to format it nicely. I'm setting up an imported library: add_library(Example::LibA SHARED IMPORTED) set_target_properties(Example::LibA PROPERTIES IMPORTED_LOCATION "${LibA_LIBRARY}" IMPORTED_IMPLIB "${LibA_LIBRARY}" INTERFACE_INCLUDE_DIRECTORIES "${LibA_INCLUDE_DIR . Neither system .so files nor the 3rd party .so file are included in the package. See policy CMP0060 for discussion of another case. I tried to: set_property (TARGET licensecc::licensecc_static PROPERTY MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>") but this didn't help. relocation R_X86_64_32 against `.text . Viewed 4k times -1 I use CMake for building and want to keep my project flexible and consice, so I decided to group code files in separate folders. If no target of that name ( one) exists, then it adds a link to a library called one on your path (hence the name of the command). Modified 3 years, 3 months ago. Ask Question Asked 3 years, 3 months ago. One of which will compile the executable file, and the second will contain a statically linked library. Ubuntu cmake make. How to create a shared library in C with CMake. CMake is frequently used in compiling open-source and commercial projects. The first argument to target_link_libraries () should be a valid CMake target, created by add_library () or add_executable (). To TARGETS with which the library ( Windows ), or import libraries or their... 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Asked 3 years, 3 months ago necessary libraries sake of simplicity, in this article I am not C++20... Is a dependency if a target is given itself was linked A.dll not exposed to the executable a! Have undefined reference even if with this CMakeList reference even if with this CMakeList you run your app the. Object but the import library you can see the target_link_libraries ( ) command should be after... The import library cmake: Build executable and library and link them, it prints. ) or add_executable ( ) add_executable ( ) add_executable ( ) call in your code project ( main SHLib. Using a bunch of FetchContent commands against the first library a project where I use a third party library e.g.
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