openwrt-packages-dist/net/dnsdist/patches/020-gcc11.patch

--- a/lock.hh
+++ b/lock.hh
@@ -20,6 +20,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 #pragma once
+#include <mutex>
 #include <shared_mutex>
 
 class ReadWriteLock