From 27872ca13c713c90cd5576722a3f672a73d4c9f6 Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Sat, 11 Nov 2017 17:31:22 +0100
Subject: [PATCH] Add an empty assembly statement to the memzero() weak symbol

---
 src/libsodium/sodium/utils.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libsodium/sodium/utils.c b/src/libsodium/sodium/utils.c
index bb94fe88..2c6d7cdb 100644
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@@ -92,6 +92,9 @@ sodium_memzero(void *const pnt, const size_t len)
 #elif HAVE_WEAK_SYMBOLS
     memset(pnt, 0, len);
     _sodium_dummy_symbol_to_prevent_memzero_lto(pnt, len);
+# ifdef HAVE_AMD64_ASM
+    __asm__ __volatile__ ("" : : "p"(pnt));
+# endif
 #else
     volatile unsigned char *volatile pnt_ =
         (volatile unsigned char *volatile) pnt;