![]() Note: Enabling C++20 requires CMake 3.12 or higher. Set_property(TARGET $TargetName PROPERTY CXX_STANDARD 20) Starting in this preview, our CMake project template will do that for you, but if you are working with an existing project you will need to add this to your CMakeLists.txt: Just make sure you have enabled the C++20 language standard. You don’t need to do anything special in your CMake project files. ![]() While CMake support for modules in Visual Studio is still experimental, it is straightforward to start using it. Using C++ Modules in MSVC from the Command Line Part 1: Primary Module Interfaces.Standard C++20 Modules support with MSVC.That post explores the details of how and when to use modules and some of the ways Visual Studio can help you do it.įor an even deeper dive into modules, you can also explore the following series: To learn more, I would recommend checking A Tour of C++ Modules in Visual Studio. They can help you compartmentalize your code, speed up build times, and they work seamlessly, side-by-side with your existing code. We are looking forward to hearing your feedback about how modules work in your CMake projects.Ĭ++ modules are a new feature in C++20. If you want to try it out, you can download the latest preview of Visual Studio today. One caveat for this early support, is that you must use the Visual Studio (MSBuild) generator. I am happy to announce that Visual Studio 2022 17.2 Preview 2 has experimental support for C++ modules in CMake projects. Ever since, the community has been asking us when CMake support was coming. JSON IntelliSense helps you edit the CMakeSettings.json file:įor more information about each of the properties in the file, see CMakeSettings.json schema reference.We’ve seen a lot of excitement around C++ modules since we announced support in the Microsoft C++ compiler and Visual Studio. This name appears in the C++ configuration dropdown. The following settings are available under the General heading: Configuration nameĬorresponds to the name setting. Visual Studio never modifies CMakeLists.txt automatically by using CMakeSettings.json you can customize the build through Visual Studio while leaving the CMake project files untouched so that others on your team can consume them with whatever tools they're using. This file provides command-line arguments and environment variables that are passed to CMake when you build the projects. The options that you choose in the editor are written to a file called CMakeSettings.json. ![]() The settings that you see in the editor might vary depending on which configuration is selected. You can add more configurations by choosing the green plus sign. Visual Studio provides one 圆4-Debug configuration by default. Now you see the Settings Editor with the installed configurations on the left. To open the CMake settings editor, select the Configuration drop-down in the main toolbar and choose Manage Configurations. However, if you prefer to edit the file directly, you can select the Edit JSON link in the upper right of the editor. It's intended to be a simpler alternative to manually editing the CMakeSettings.json file. The editor lets you add CMake configurations and customize their settings easily. If you maintain projects that use a CMakeSettings.json file for CMake build configuration, Visual Studio 2019 and later versions provide a CMake settings editor. For more information on CMakePresets.json, see Configure and build with CMake Presets. CMakePresets.json is supported directly by CMake and can be used to drive CMake generation and build from Visual Studio, from VS Code, in a Continuous Integration pipeline, and from the command line on Windows, Linux, and Mac. CMakePresets.json is supported by Visual Studio 2019 version 16.10 or later and is the recommended CMake configuration file. Visual Studio uses a CMake configuration file to drive CMake generation and build.
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