&& (OPENSSL_VERSION_NUMBER & 0x0000ff000L) >= 0x000002000L
# define EXIM_HAVE_OPENSSL_CHECKHOST
# endif
+#endif
+#if !defined(LIBRESSL_VERSION_NUMBER) \
+ || LIBRESSL_VERSION_NUMBER >= 0x20010000L
# if !defined(OPENSSL_NO_ECDH)
# if OPENSSL_VERSION_NUMBER >= 0x0090800fL
# define EXIM_HAVE_ECDH