mbed TLS cmake support FindMbedTLS.cmake is come from https://github.com/AVSystem/avs_commons/blob/master/cmake/FindMbedTLS.cmake, which is licensed under Apache 2.0 alternatives: https://github.com/curl/curl/blob/master/CMake/FindMbedTLS.cmake without variable MBEDTLS_ROOT_DIR https://github.com/libgit2/libgit2/blob/master/cmake/Modules/FindmbedTLS.cmake GPLv2 with a special Linking Exception