AWS SDK for C++

One of our dependencies s2n overrides the openssl RAND engine, For reasons elaborated on in their documentation. this functionally means that RAND_poll is not implemented on the override and using the function after initializing the SDK will result in error. You can disable this behavior completely by specifying

-DS2N_OVERRIDE_LIBCRYPTO_RAND_ENGINE=OFF

as part of the SDK build. This will continue to use the RAND Engine from the detected OpenSSL dependency.