error: field 'ctx' has incomplete type EVP_CIPHER_CTX
Problem: I need to install Cepstral (tts engine) into Freeswitch running Debian 8. Freeswitch is already up and running, but I needed to build it from source in order for it create the mod_cepstral module. When I run make this is the error I get: In file included from ./crypto/include/prng.h:17:0, from ./crypto/include/crypto_kernel.h:50, from ./include/srtp.h:53, from srtp/srtp.c:46: ./crypto/include/aes_icm_ossl.h:66:20: error: field ‘ctx’ has incomplete type EVP_CIPHER_CTX ctx; ^~~ In file included from srtp/srtp.c:50:0: ./crypto/include/aes_gcm_ossl.h:58:18: error: field ‘ctx’ has