Hi maintainers, the Boost superproject build now requires CMake 3.8 or higher. The reason for this is that the CMake feature `cxx_std_11` to declare the C++11 requirement was introduced in that version and is now used by a large amount of libraries, directly or indirectly. This change [1] was made due to users being confused about which CMake versions are required/supported (e.g. [2]). A couple libraries failed to declare the CMake 3.8 requirement even though they were using `cxx_std_11` leading to error messages that were not easy to understand to someone not used to CMake. I opened PRs fixing the requirements in a couple of repositories which I discovered during testing with a range of different CMake versions. Raising the minimum version to 3.8 reduces the number of versions to be tested with a low enough cost given the actual requirement by the many individual libraries and availability of that version (3.8 is old enough that it should be easily available to users, current versions are 3.31 and 4.1.) Note that some features of the Superproject require even higher versions: - BoostTestJamfile requires 3.9 - Automatic installation requires 3.13 So users should be using at least CMake 3.13 anyway. Stay safe! Alex [1] https://github.com/boostorg/boost/pull/1088 [2] https://github.com/boostorg/boost/pull/1081