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Explore the fundamentals of C++20 modules and their integration with CMake in this comprehensive conference talk from C++Now 2025. Learn to build both shared and static libraries using CMake's non-experimental support for C++20 modules, which was released in October 2023. Discover practical techniques for setting up build files and organizing source code with modules, while examining real-world open-source module projects to understand current implementation patterns. Master the "import std" model and learn how to create module interfaces for large existing libraries, facilitating smoother transitions to modular codebases. Gain hands-on experience with CMake configuration for C++20 modules across Visual Studio, Clang, and GCC compilers, and understand how to leverage this cutting-edge feature to improve compile times, enhance code organization, and streamline dependency management. Whether maintaining legacy code or starting new projects, acquire the essential tools and techniques needed to confidently integrate C++20 modules into your development workflow and make the most of this significant advancement in the C++ language.
