I am currently working on a C++ IMAP library so that I can improve on some admittedly rusty C++ skills. I would like to make the library as portable as possible so that I ca
This looks to me like Boost has not been updated to work with OpenSSL 1.1.0. There have been a number of API changes between OpenSSL 1.0.2 and 1.1.0 and they are not fully source compatible. I suggest you use 1.0.2 until Boost has been updated to work with the new OpenSSL version (which is still in beta anyway).