A question has been brought up regarding whether or not a Boost library author is permitted to include a 'CMakeLists.txt' file in the root of the directory. This stemmed from a discussion at C++Now 2016 which included several members of the Boost Steering Committee and a sampling of the Boost community. We recommend and propose that the Boost Guidelines are modified to allow library authors, at their own discretion, to include a 'CMakeLists.txt' file in their library's top-level directory. * Several libraries, such as Boost.Hana and Boost.Spirit, have two distribution mechanisms: one as distributed with Boost and the other as an independent package. The requirement that these libraries not include a 'CMakeLists.txt' as part of their Boost distribution creates a maintenance burden for authors or otherwise hurts usability of the independent distribution. * Several companies have revealed that they are building Boost with their own custom CMake scripts. The suggested policy change would enable authors to relieve the infrastructure cost of their CMake users and unify how their library is built. * CMake is, by far, the most popular build system for C++. Allowing authors to support CMake users in addition to BJam will help the Boost ecosystem to grow and thrive by lowering the barriers to access. -- David Sankel