## Summary Since CMake 3.30, `FetchContent_Populate` is deprecated in favor of `FetchContent_MakeAvailable`. ## Exact steps to reproduce Try building GROMACS with CMake 3.30, observe the following warning: ``` CMake Warning (dev) at /usr/share/cmake-3.30/Modules/FetchContent.cmake:1953 (message): Calling FetchContent_Populate(muparser) is deprecated, call FetchContent_MakeAvailable(muparser) instead. Policy CMP0169 can be set to OLD to allow FetchContent_Populate(muparser) to be called directly for now, but the ability to call it with declared details will be removed completely in a future version. Call Stack (most recent call first): cmake/gmxManageMuparser.cmake:59 (FetchContent_Populate) src/gromacs/CMakeLists.txt:69 (gmx_manage_muparser) This warning is for project developers. Use -Wno-dev to suppress it. ``` In some cases, it is even a fatal error: https://gromacs.bioexcel.eu/t/cmake-error-at-usr-local-share-cmake-3-30-modules-fetchcontent-cmake-1951-message/10117 ## For developers: Why is this important? We don't need extra CMake warnings. ## Possible fixes - 2024: set the policy to old - 2025: use `FetchContent_MakeAvailable`