configure: Check for Berkeley DB for arpd compilation

Add check for Berkeley DB header & lib before compile arpd util.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

configure

@@ -289,12 +289,34 @@ check_mnl()
 	if ${PKG_CONFIG} libmnl --exists
 	then
 		echo "HAVE_MNL:=y" >>Config
-		echo -n "yes"
+		echo "yes"
 	else
-		echo -n "no"
+		echo "no"
 	fi
 }
 
+check_berkeley_db()
+{
+    cat >$TMPDIR/dbtest.c <<EOF
+#include <fcntl.h>
+#include <stdlib.h>
+#include <db_185.h>
+int main(int argc, char **argv) {
+	dbopen("/tmp/xxx_test_db.db", O_CREAT|O_RDWR, 0644, DB_HASH, NULL);
+	return 0;
+}
+EOF
+    $CC -I$INCLUDE -o $TMPDIR/dbtest $TMPDIR/dbtest.c -ldb >/dev/null 2>&1
+    if [ $? -eq 0 ]
+    then
+	echo "HAVE_BERKELEY_DB:=y" >>Config
+	echo "yes"
+    else
+	echo "no"
+    fi
+    rm -f $TMPDIR/dbtest.c $TMPDIR/dbtest
+}
+
 echo "# Generated config based on" $INCLUDE >Config
 check_toolchain
 
@@ -328,6 +350,9 @@ check_elf
 echo -n "libmnl support: "
 check_mnl
 
+echo -n "Berkeley DB: "
+check_berkeley_db
+
 echo
 echo -n "docs:"
 check_docs

misc/Makefile

 SSOBJ=ss.o ssfilter.o
 LNSTATOBJ=lnstat.o lnstat_util.o
 
-TARGETS=ss nstat ifstat rtacct arpd lnstat
+TARGETS=ss nstat ifstat rtacct lnstat
 
 include ../Config
 
+ifeq ($(HAVE_BERKELEY_DB),y)
+	TARGETS += arpd
+endif
+
 ifeq ($(HAVE_SELINUX),y)
 	LDLIBS += $(shell pkg-config --libs libselinux)
 	CFLAGS += $(shell pkg-config --cflags libselinux) -DHAVE_SELINUX