+ SAVE_CFLAGS=$CFLAGS
+ CFLAGS="$CFLAGS -I$KERNEL_DIR/include"
+
+ AC_CHECK_HEADERS(linux/netfilter_ipv4/ip_tables.h linux/netfilter_ipv6/ip6_tables.h, [],
+ [
+ with_libiptc="no (Linux iptables headers not found - check KERNEL_DIR)"
+ with_own_libiptc="no"
+ ],
+ [
+#include "$srcdir/src/libiptc/ipt_kernel_headers.h"
+ ])
+
+ CFLAGS=$SAVE_CFLAGS