CppCon 2024

C++20 modules represent a significant advancement in the language, promising to improve compile times, enhance code organization, and streamline dependency management. This talk is tailored for developers eager to harness the power of C++20 modules in their projects. We will explore the fundamentals of building both shared and static libraries using CMake, the de facto build system for C++.

Attendees will gain practical insights into setting up build files and organizing source code with modules. We will dissect real-world open-source module projects, offering a concrete understanding of how modules are being used in the wild. A key focus will be on the "import std" model, demonstrating how to create a module interface for large, existing libraries, facilitating a smoother transition to modular codebases.

Significantly, CMake released non-experimental support for C++20 modules in October 2023, marking a pivotal moment for developers. Visual Studio, Clang and GCC all have some level of support for modules. However, the adoption of this feature is still in its early stages, with relatively few projects currently leveraging it. This session will bridge that gap, providing the essential knowledge and hands-on techniques to confidently integrate C++20 modules into your development workflow.

By the end of this session, participants will be equipped with the knowledge to effectively use CMake for building projects with C++20 modules, making the most of this cutting-edge feature to enhance their codebases. Whether you're maintaining legacy code or starting a new project, this talk will provide the essential tools and techniques to master C++20 modules.