+for ac_header in gnutls/gnutls.h
+do :
+ ac_fn_c_check_header_mongrel "$LINENO" "gnutls/gnutls.h" "ac_cv_header_gnutls_gnutls_h" "$ac_includes_default"
+if test "x$ac_cv_header_gnutls_gnutls_h" = xyes; then :
+ cat >>confdefs.h <<_ACEOF
+#define HAVE_GNUTLS_GNUTLS_H 1
+_ACEOF
+ B64_GNUTLS=bin/ed25519_privkey_pem_to_pubkey_raw_b64
+fi
+
+done