From eda9aa0d314ca8e8919d4c17927aa86290449f8d Mon Sep 17 00:00:00 2001
From: Philipp Stephani <phst@google.com>
Date: Wed, 19 Jul 2017 21:21:40 +0200
Subject: [PATCH] * src/gnutls.c (clear_storage): Define only if needed.

---
 src/gnutls.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/gnutls.c b/src/gnutls.c
index e406d665190..7c988408528 100644
--- a/src/gnutls.c
+++ b/src/gnutls.c
@@ -1891,6 +1891,8 @@ The alist key is the cipher name. */)
   return ciphers;
 }
 
+#ifdef HAVE_GNUTLS3_AEAD
+
 /* Zero out STORAGE (even if it will become inaccessible.  It has
    STORAGE_LENGTH bytes.  The goal is to improve security a bit, in
    case an Emacs module or some buggy part of Emacs attempts to
@@ -1907,6 +1909,8 @@ clear_storage (void *storage, ptrdiff_t storage_length)
   explicit_bzero (storage, storage_length);
 }
 
+#endif  /* HAVE_GNUTLS3_AEAD */
+
 static Lisp_Object
 gnutls_symmetric_aead (bool encrypting, gnutls_cipher_algorithm_t gca,
                        Lisp_Object cipher,
-- 
2.11.4.GIT