To use libcrypto++, I found online that openssl will suffice. But while there is a port file for both libraries, there's no openssl.mk in lib/mk. Grepping the mk files I saw a line in libcrypto.inc which calls select_from_ports,openssl. So, is it the case that we prepare_port for openssl but add LIBS += libcrypto in our target.mk files?