https://bugzilla.netfilter.org/show_bug.cgi?id=1637

From a6df37777fc47c2473a13501c17eb3cbbf922ec1 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Thu, 24 Nov 2022 07:57:37 +0000
Subject: [PATCH 3/3] Fix -Wimplicit-function-declaration

Bug: https://bugzilla.netfilter.org/show_bug.cgi?id=1637
Signed-off-by: Sam James <sam@gentoo.org>
--- a/src/read_config_lex.l
+++ b/src/read_config_lex.l
@@ -21,6 +21,7 @@
 
 #include <string.h>
 
+#include "log.h"
 #include "conntrackd.h"
 #include "read_config_yy.h"
 %}
@@ -174,7 +175,7 @@ notrack		[N|n][O|o][T|t][R|r][A|a][C|c][K|k]
 %%
 
 int
-yywrap()
+yywrap(void)
 {
 	return 1;
 }
--- a/src/read_config_yy.y
+++ b/src/read_config_yy.y
@@ -31,14 +31,25 @@
 #include "cidr.h"
 #include "helper.h"
 #include "stack.h"
+#include "log.h"
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
 #include <sched.h>
 #include <dlfcn.h>
+
 #include <libnetfilter_conntrack/libnetfilter_conntrack.h>
 #include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.h>
 
 extern char *yytext;
 extern int   yylineno;
 
+int yylex (void);
+int yyerror (char *msg);
+void yyrestart (FILE *input_file);
+
 struct ct_conf conf;
 
 static void __kernel_filter_start(void);