X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Froute.c;h=4d7127959308cc0fcb6be76614469339202359ee;hp=a3e92020ce4bcc47c2aa10be772990b92cb73c61;hb=7c73cb3ace6659df58ec2382b8d47bb521dad886;hpb=d661c7c7353da90911e9f2d0195ac861d6837f5c

diff --git a/src/route.c b/src/route.c
index a3e92020..4d712795 100644
--- a/src/route.c
+++ b/src/route.c
@@ -59,6 +59,7 @@ static const size_t opt_size = sizeof(struct nd_opt_hdr);
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 #endif
 
+volatile int dummy;
 static timeout_t age_subnets_timeout;
 
 /* RFC 1071 */
@@ -80,6 +81,11 @@ static uint16_t inet_checksum(void *data, int len, uint16_t prevsum) {
 		checksum = (checksum & 0xFFFF) + (checksum >> 16);
 	}
 
+	// Work around a compiler optimization bug.
+	if(checksum) {
+		dummy = 1;
+	}
+
 	return ~checksum;
 }