From 5b0bee7086222085c3c0e5fc33989ee277d00d82 Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Wed, 15 Jan 2020 10:00:44 +0100
Subject: [PATCH] use pkg-config to detect xtables library for
 iptables-extension

---
 iptables-extension/Makefile | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/iptables-extension/Makefile b/iptables-extension/Makefile
index 0d3e0bdbf..61c5aef5d 100644
--- a/iptables-extension/Makefile
+++ b/iptables-extension/Makefile
@@ -11,7 +11,17 @@ else
   endif
 endif
 
-XTABLES		= $(shell test -e /usr/include/xtables.h && echo 1)
+XTABLES_INSTALLED=$(shell \
+  if pkg-config --exists xtables; then \
+    echo 'xtables found'; \
+  fi)
+ifneq ($(XTABLES_INSTALLED),)
+XTABLES = 1
+CFLAGS  += $(shell pkg-config --cflags --libs xtables)
+else
+XTABLES = $(shell test -e /usr/include/xtables.h && echo 1)
+endif
+
 IPTABLES	= $(shell test -e /usr/include/iptables.h && echo 1)
 IP6TABLES	= $(shell test -e /usr/include/ip6tables.h && echo 1)