Add missing cstring header file

d713e3f1 · Tatsuhiro Tsujikawa · c07b793e · d713e3f1
Commit d713e3f1 authored 4 years ago by Tatsuhiro Tsujikawa
--- a/examples/util.cc
+++ b/examples/util.cc
@@ -34,6 +34,7 @@
 #include <netdb.h>

 #include <cassert>
+#include <cstring>
 #include <chrono>
 #include <array>
 #include <iostream>