# if GNUTLS_VERSION_NUMBER >= 0x020a00
# define SHA_GNUTLS
# if GNUTLS_VERSION_NUMBER >= 0x030500
-# define EXIM_HAVE_SHA3
+# define EXIM_HAVE_SHA3 /*MMMM*/
# endif
# else
# define SHA_GCRYPT
# else
# define SHA_OPENSSL
# include <openssl/ssl.h>
-# if OPENSSL_VERSION_NUMBER >= 0x10101000L
+# if (OPENSSL_VERSION_NUMBER >= 0x10101000L) && !defined(LIBRESSL_VERSION_NUMBER)
# define EXIM_HAVE_SHA3
# endif
# endif