I've noticed the discussion on Boost 2 where build2 was mentioned as one of the potential build systems. So I wanted to say that we would be happy to help on our side with any questions, missing features (like exporting targets in a CMake-compatible manner, as mentioned by Niall), etc. Also a couple of additional points about build2 that I think could be relevant to Boost 2 (or 1): 1. It is currently the only build system that I am aware of that has support for C++ modules (currently TS but we are tracking the standardization/implementation progress closely; see [1] for details). Now that modules are likely to be in C++20 I think this should be at least a consideration for Boost 2. 2. We have a public CI service[2] for open source project that I think could be quite useful to Boost. It might not currently be as extensive as Boost's (see [3] for the currently offered build configurations) but we are continuously expanding it plus Boost can run its own build machines with additional configurations. 3. build2 comes with a package manager[4] and Boost could take advantage of that by either publishing to cppget.org or running its own package repository (or both). I am happy to answer any questions here (if appropriate, of course), on the build2 mailing list[5], or on the #build2 slack channel[6]. [1] https://build2.org/build2/doc/build2-build-system-manual.xhtml#cxx-modules [2] https://ci.cppget.org [3] https://ci.cppget.org/?build-configs [4] https://build2.org/build2-toolchain/doc/build2-toolchain-intro.xhtml#guide-r... [5] https://lists.build2.org/ [6] https://cpplang.slack.com/app_redirect?channel=build2