The folder provides build scripts and configuration recipes for building the MbedTLS library. The source code needs to be downloaded by the user, or via the support in pw_package "pw package install mbedtls". For gn build, set dir_pw_third_party_mbedtls to point to the path of the source code. For applications using MbedTLS, add $dir_pw_third_party/mbedtls to the dependency list.