Modern cmake shared library example

So I'm trying to learn how to do CMake in a modern way. If I understand correctly, the "modern way" is to use IMPORTED targets. Preamble-----I have a project which builds a library `foo`. This library can be built as static or shared, depending on value of BUILD_SHARED_LIBS. My CMakeLists.txt does not perform any special handling of either case. I have added support for generating and installing cmake-config file. If you want to use Qwt directly from cmake. Build: mkdir build && cd build cmake .. -DCMAKE_INSTALL_PREFIX=<where-you-want-to-install-qwt> cmake --build . cmake --install . You could build both shared and static libraries by passing -DQWT_STATIC=ON to cmake.. (I should preface this by saying that I stick with more of a vanilla CMake approach instead of using the ament CMake macros.) I think the main problem is that rclcpp isn't a valid library name for target_link_libraries.You'll have to use ${rclcpp_LIBRARIES} instead, which gets evaluated to the names of the libraries exported by the rclcpp package.. You might also. Build Library or Executable from AUTOSAR Adaptive Model. As part of generating code for an AUTOSAR adaptive model, you can generate a CMakeLists.txt file for building a static or shared library or an executable. The AUTOSAR Adaptive | CMake toolchain generates the CMakeLists.txt file following modular CMake patterns. You can link the resulting library. CMAKE_INSTALL_PREFIX : String : The install location. CMAKE_BUILD_TYPE : String : Defaults to "debug". BUILD_SHARED_LIBS : Bool : The default build generates a dynamic (dll/so) library. Set this to OFF to create a static library only. BUILD_STATIC_LIBS : Bool : The default build generates a static (lib/a) library. Set this to OFF to create a. Modern CMakeModern CMake uses new(er) APIs • Modern CMake is target focused – Include Directories – Compile Options – Compile Definitions • Modern CMake introduces the concept of usage requirements – PUBLIC – PRIVATE – INTERFACE • Modern CMake is more declarative. Let’s write CMake code! 8. Let’s write CMake code! 9. Shared Library Mixed. Introduction. Code reuse with functions and macros. Splitting CMake sources into modules. Writing a function to test and set compiler flags. Defining a function or macro with named arguments. Redefining functions and macros. Deprecating functions, macros, and variables. Limiting scope with add_subdirectory. VRonin 27 Nov 2017, 05:29 @Sewing. @Sewing said in fail to use Q_OBJECT Macro in CMake Project: pimpl idiom in which the nested implementation class in defined entirely within the source file. You can move it into a header file, Qt does it all the time, they use _p.h suffix to mark private headers. For example: QDateTimePrivate. The focus of these chapters are on Modern OpenGL. Learning (and using) modern OpenGL requires a strong knowledge of graphics programming and how OpenGL operates under the hood to really get the best of your experience. So we will start by discussing core graphics aspects, how OpenGL actually draws pixels to your screen, and how we can leverage. . The way you use CMake affects your users! 1. 4. CMake’s similarities with C++ • big userbase, industry dominance • focus on backwards compatibility • complex, feature rich, ”multi paradigm” • bad reputation, ”bloated”, ”horrible syntax” • some not very well known features 2. 5. Variables in conanbuildinfo.cmake¶. Package declared variables:. For each requirement conanbuildinfo.cmake file declares the following variables. Where <PKG-NAME> is the placeholder for the name of the require in uppercase (ZLIB for zlib/[email protected]/stable) in cpp_info.names["cmake_find_package"] or cpp_info.names["cmake_find_package_multi"] if. Extending python is the process of creating python extensions programmed in C or C++ in the form of shared libraries (.pyd in win, .so in nix) that can be imported and executed from the python environment. The binary native extensions would typically contain the performance critical code as well as functionality that was previously implemented. CMake allows easy external project download and incorporation. 5. CMake supports cross-compilation like a champ. 6. CMake makes it easy to handle include paths. 7. CMake makes it easy to handle compilation, linking and preprocessor flags. 8. CMake is supported by all major C++ package managers. Cmake target compile options. Chapter 2: The CMake Language; Technical requirements; The basics of the CMake Language syntax; Working with variables; Using lists; Understanding control structures in CMake. It is essential to check the manual according to the version of CMake used in the project or else there could be missing modules. It is also possible to find the installed modules with cmake --help-module-list. There is a nice example for a FindSDL2.cmake on Github. Here's a basic CMakeLists.txt that would require SDL2:. If the other library is part of your whole CMake project structure you can do so using the target name (for example if you want to create a new library called libfolder2 you would link libfolder_static into it. The other way would be to link the libfolder.lib file directly: project (libfolder2 LANGUAGES C CXX) add_library (libfolder2_static. CMake options¶. CMAKE_BUILD_TYPE (default Release) : CMake compile mode, four modes are available: Debug, Release, RelWithDebInfo and MinSizeRel.; CMAKE_INSTALL_PREFIX: Where the C++ library is installed.On Linux the default install path is /usr/local, and on Windows is C:\Program Files\minisam by default.; MINISAM_BUILD_PYTHON_PACKAGE (default OFF). Example CMake CMake is an open-source, cross-platform family of tools designed to build, test, and package software. It is build-system generator -- on NERSC machines, CMake will generate UNIX Makefiles, by default -- and there is no need to enable CMake in cross-compilation mode, e.g. cmake -DCMAKE_SYSTEM_NAME=CrayLinuxEnvironment <etc>. You can find a complete CMake integration example in examples/libnabo-cmake-example to see how to look for, and link against this library. Python bindings. libnabo includes python bindings that are compiled if Python is available. The resulting module is called pynabo, you can see an example in python/test.py. You can find more information in. Open the Command Palette ( Ctrl+Shift+P) and run the CMake: Quick Start command: Enter a project name. This will be written to CMakeLists.txt and a few initial source files. Next, select Executable as the project type to create a basic source file ( main.cpp) that includes a basic main () function. CMake will then combine all the necessary information automatically. The type of the IMPORTED target created in the add_library() command can always be specified as UNKNOWN type. This simplifies the code in cases where static or shared variants may be found, and CMake will determine the type by inspecting the files. CMake will build the library as libtest.a and install it into lib folder of the install directory. We also include our public header file into the install step and tell cmake to put it into include. Instead of a static library we can build a. Building with Visual Studio. For Visual Studio it could look like this: $ mkdir build. $ cd build. $ cmake .. -G "Visual Studio 15 2017 Win64" -DTinyTIFF_BUILD_SHARED_LIBS=ON -DTinyTIFF_BUILD_STATIC_LIBS=ON. This call results in a Visual Studio solution build/TinyTIFF.sln that you can load and compile from the Visual Studio IDE. Linking a program with a static library is as simple as adding it to the link command either directly with its full path: . $ cmake -H/path/to/poco -B/path . A little practical example: let's build our library as static, link to it from external project, then build it as shared and link to that one. First, we need to tell CMake the library name, version and language. Next, we set the default build type, just in case the user does not specify it. We also will set the source file variable and. There're a lot of interesting thing going on here. In the first command, BUILD_SHARED_LIBS is read by CMake to switch between static and shared library, and a user could alter this option in cache. Well, the generate_export_header command creates a header file which helps switch between building shared and static libraries. And here is the generated common.h file with msvc, and you should. cmake-init [--c] <path> This command will create a CMake project at the provided location and according to the answers given to the prompts. You may pass the -s, -e or -h flags after to quickly create a shared library, executable or a header only library respectively. The --c switch will set the generated project's type to C instead of C++. A modern CMake's CMakeLists.txt is a collection of targets and properties. A target is a job of the building process or, in other words, a desired outcome. In our example, we want to build the source code into a binary executable: that's a target. Targets have properties: for example the source files required to compile the executable, the compiler options, the dependencies and so. There's also the PRIVATE keyword that can be used to avoid adding the settings to all dependent targets. A simple example Here's a small example of a library that uses Boost in its headers and therefore wishes to have its clients setup those directories as well: 1 2 3 4 5 6 7 8 9 10 set (TARGET_NAME cool_lib) add_library ($ {TARGET_NAME} STATIC. If a library does not export any symbols, it must not be declared as a SHARED library. For example, a Windows resource DLL or a managed C++/CLI DLL that exports no unmanaged symbols would need to be a MODULE library. This is because CMake expects a SHARED library to always have an associated import library on Windows. With the help of programming language bindings, you can use a shared library even if you develop your application in a different programming language. For example, a Python, Java, C# or Object Pascal application can use a shared library developed in C. In this article, I’ll show you how you can create your own shared library. The CMake content is written in the CMakeLists.txt. An example to write a CMakeLists.txt (e.g. in AppA/) for an application written only in main.cpp without any dependency of library_a and library_b is: cmake_minimum_required (VERSION 3.5) project (AppA) add_definitions(-std=c++11) include_directories(/usr/local/include). cxx-static-shared-example. 1: 20: gr-rpitx. 1: 14: cmake-library. Template of CMake to build a static or shared library under Windows and Linux: 1: 7: templatepp. A cross-platform project template for modern C and C++: 1: 7: pppp-vita. PP++: 1: 4: FetchBoostContent. CMake FetchContent for Boost libraries: 1: 1: ros_sim. 1: 0: fsr2022. 1: 0: sanitizer_workflows. Github. Here’s a small example of a library that uses Boost in its headers and therefore wishes to have its clients setup those directories as well: 1 2 3 4 5 6 7 8 9 10 set (TARGET_NAME cool_lib) add_library ($ {TARGET_NAME} STATIC cool_feature.cpp cool_feature.hpp) target_include_directories ($ {TARGET_NAME} INTERFACE $. This module is part of CMake since version 3.11 , and uses the ExternalProject module’s functionality for some tasks, like the actual downloading. The primary difference is the time when external projects are brought in to your own project: At CMake’s configure time instead of the later build time. Aside from just going to the library folder and running CMake from there, you can actually do it from the project root - by setting --target option on build: $ rm -r ./* && cmake -DCMAKE_BUILD_TYPE=Debug .. $ cmake --build . --target SomeLibrary Scanning dependencies of target SomeLibrary [ 50%] Building CXX object libraries/SomeLibrary. There's also the PRIVATE keyword that can be used to avoid adding the settings to all dependent targets. A simple example Here's a small example of a library that uses Boost in its headers and therefore wishes to have its clients setup those directories as well: 1 2 3 4 5 6 7 8 9 10 set (TARGET_NAME cool_lib) add_library ($ {TARGET_NAME} STATIC. So, the only required argument on the CMake command line is the name of the directory containing the CMakeLists.txt file of the code you want to build. For example, download the source tarball and use tar xfz gromacs-5.1.2.tgz cd gromacs-5.1.2 mkdir build-gromacs cd build-gromacs cmake. The -G option lets the user choose a cmake generator, the -DCMAKE_INSTALL_PREFIX option lets the user choose an install prefix, and the -DBUILD_SHARED option lets the user choose to build LASi as a shared library ( ON) or as a static library ( OFF ). Build LASi : make all >& all.out. This simply makes a list of files that is visible in the “parent scope,” i.e., from within the CMakeLists.txt that contains add_subdirectory(src).The PREPEND function just adds the full path to the beginning of each file. 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