You declare the source (like a GitHub repo or a URL) and then make it available.
Downloading CMake modules is a critical skill for modern C++ development, enabling you to automate dependency management and extend CMake's core functionality. While CMake comes with many built-in modules , you often need to download external ones to support specific libraries or custom build logic. 1. Using the Built-in FetchContent Module how to download cmake modules
The most modern and recommended way to "download" CMake modules—or entire libraries—is through the module. This tool retrieves external content at configure time , making it immediately available for your build process. You declare the source (like a GitHub repo
Projects where you want dependencies to be handled automatically without manual downloads. Example Implementation: Projects where you want dependencies to be handled
include(FetchContent) FetchContent_Declare( my_module GIT_REPOSITORY https://github.com GIT_TAG main ) FetchContent_MakeAvailable(my_module) Use code with caution. 2. Manual Download and CMAKE_MODULE_PATH