See https://github.com/boostorg/cmake/issues/85. Probably caused by https://github.com/boostorg/asio/commit/be4af2d923f6145cd384e9bd1d572a5f204f5461. When making changes to CMakeLists.txt, please test installation (and ideally add_subdirectory use as well.)
See boostorg/cmake#85. Probably caused by boostorg/asio@be4af2d.
When making changes to CMakeLists.txt, please test installation (and ideally add_subdirectory use as well.)