![]() ![]() ![]() # This is a single line comment Targets The different types of targetsĪ target usually is an executable or a library, but can also be a custom target if your project needs to run some custom tools. 0 LANGUAGES C CXX) CommentsĬomments start with the character # and can be multiline ( bracket comments) if following the bracket_open syntax. This can be done easily with the project command: project(YOUR_PROJECT_NAME VERSION 0.1. Then, you'll want to specify the name, languages and version (needed for packaging purposes). Please do not use something older than 3.1, which dates back to 2014! cmake_minimum_required(VERSION 3.14) Project description ![]() In our case we choose CMake 3.14 as it is not too old and supports most recent features. This is important because CMake can have different behaviours based on its versions, which are named policies.ĭepending on the features you will be using, you might need to ask for more recent versions of CMake. The first thing you will need in it, is to specify the minimum version of CMake you will be using. CMake uses a file named CMakeLists.txt, and it is written in its own scripting language. The CMakeLists.txt fileĪll build systems require some kind of entrypoint for the definition of the project. This is the first article of a mini series related to build systems and continuous integration. We hope to answer this question so that the C++ community can thrive, and make it easier for everyone to integrate any library in a project. So while CMake is far from perfect, for now, it does the job.īut how does one write a good CMake project? It also requires no additional dependency such as Python which usually makes it a tiny bit easier to install for Continuous Integration on platforms such as Windows. ![]() We based this choice on the fact that most of the ecosystem is using CMake, so IDEs now have decent support for it, so do most libraries and major package managers. There are many (relatively) new (meta) buildsystems around lately such as build2 or meson. In this case, a variable is listed, $ variable.Cmake,tutorial,C++,buildsystem Why CMake?Īt siliceum, we decided to use CMake for our C++ based projects. The first argument is the name of the executable (which we created on the previous line), the rest of the arguments are library names. Line2: The target_link_libraries command is used to indicate that an executable uses code in a library and needs to link to it when built.For lab1, we only have one source file, main.c. The first argument is the executable name (lab1.elf), the rest of the arguments are the list of source files that need to be compiled for this program. Line1: The add_executable command is used to indicate that you want to create a new program executable.You will see this command added for the lab1 folder, which instructs CMake to process the Lab 1 CMakeLists.txt file.įor labs after Lab 1, you will need to add additional statements here.Ĭreating Executables using CMakeLists.txt Files The add_subdirectory commands instructs CMake to go into a subdirectory and look for another CMakeLists.txt to run.All of the necessary paths are already included you don’t need to add any more. The include_directories command add a directory for the compiler to search in for your header (.h) files.You don’t need to understand everything in this file, but it’s worth noting a few important parts: Look over the top-level CMakeLists.txt file. , you are instructing the CMake tool to go up one level (from /build to /) and look for a CMakeLists.txt file. ![]()
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