From db1dd21762974c2a1cab00c411dcab61e1759998 Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Fri, 21 Apr 2017 01:02:40 +0200
Subject: [PATCH] Prevent possible compiler optimizations

---
 src/libsodium/sodium/utils.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libsodium/sodium/utils.c b/src/libsodium/sodium/utils.c
index 56bb777d..0ab8c044 100644
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@@ -124,8 +124,8 @@ sodium_memcmp(const void *const b1_, const void *const b2_, size_t len)
     const volatile unsigned char *volatile b2 =
         (const volatile unsigned char *volatile) b2_;
 #endif
-    size_t        i;
-    unsigned char d = (unsigned char) 0U;
+    size_t                 i;
+    volatile unsigned char d = (unsigned char) 0U;
 
 #if HAVE_WEAK_SYMBOLS
     _sodium_dummy_symbol_to_prevent_memcmp_lto(b1, b2, len);