diff --git a/.gitignore b/.gitignore
index 1ce28cf..437aae6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,41 @@
-chinadns
+*.cmake
+*.dSYM
+*.exp
+*.la
+*.lo
+*.log
+*.o
+*.plist
+*.scan
+*.sdf
+*.status
+*.tar.*
+*~
+.DS_Store
+.deps
+.dirstamp
+.done
+.libs
+Build
+Makefile
+Makefile.in
+aclocal.m4
+autom4te.cache
+build
+compile
+confdefs.h
+config.*
+configure
+depcomp
+android-toolchain
+install-sh
+libtool
+ltmain.sh
+m4/argz.m4
+m4/libtool.m4
+m4/ltoptions.m4
+m4/ltsugar.m4
+m4/ltversion.m4
+m4/lt~obsolete.m4
+src/chinadns
+missing
diff --git a/Makefile b/Makefile
deleted file mode 100644
index ec218ed..0000000
--- a/Makefile
+++ /dev/null
@@ -1,16 +0,0 @@
-CC ?= gcc
-DESTDIR ?= /usr/local
-
-all: chinadns
-
-chinadns: src/chinadns.c
-	$(CC) -Wall -O3 src/chinadns.c -lresolv -o chinadns
-
-.PHONY: clean all install
-
-install: chinadns
-	install -d $(DESTDIR)/bin/
-	install chinadns $(DESTDIR)/bin/
-
-clean:
-	rm -f chinadns
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..af437a6
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS = src
diff --git a/README.md b/README.md
index 151904f..9fe26cc 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,10 @@ Install
 
 * Linux / Unix
 
-        make
+    Download a [release].
+
+        ./configure && make
+        src/chinadns -l iplist.txt
 
 * OpenWRT
 
@@ -99,5 +102,6 @@ Mailing list: http://groups.google.com/group/shadowsocks
 [ChinaDNS]:        https://github.com/clowwindy/ChinaDNS
 [Download]:        https://sourceforge.net/projects/chinadns/files/dist/
 [Issue Tracker]:   https://github.com/clowwindy/ChinaDNS-C/issues?state=open
+[release]:         https://github.com/clowwindy/ChinaDNS-C/releases
 [SDK]:             http://wiki.openwrt.org/doc/howto/obtain.firmware.sdk
 [Travis CI]:       https://travis-ci.org/clowwindy/ChinaDNS-C
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..fd933df
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,34 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.67])
+AC_INIT([ChinaDNS-C], [1.0.1], [clowwindy42@gmail.com])
+AC_CONFIG_SRCDIR([src/chinadns.c])
+AC_CONFIG_HEADERS([config.h])
+
+AM_INIT_AUTOMAKE([foreign -Wall])
+
+# Checks for programs.
+AC_PROG_CC
+AC_PROG_INSTALL
+
+# Checks for libraries.
+# FIXME: Replace `main' with a function in `-lresolv':
+AC_CHECK_LIB([resolv], [main])
+
+# Checks for header files.
+AC_HEADER_RESOLV
+AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h stdlib.h string.h sys/socket.h unistd.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_TYPE_SIZE_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UINT16_T
+
+# Checks for library functions.
+AC_FUNC_MALLOC
+AC_FUNC_REALLOC
+AC_CHECK_FUNCS([inet_ntoa memset select socket strchr strdup])
+
+AC_CONFIG_FILES([Makefile src/Makefile])
+AC_OUTPUT
diff --git a/openwrt/Makefile b/openwrt/Makefile
index 2ff0b32..0710db2 100644
--- a/openwrt/Makefile
+++ b/openwrt/Makefile
@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ChinaDNS-C
-PKG_VERSION:=1.0.0
+PKG_VERSION:=1.0.1
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_URL:=https://github.com/clowwindy/ChinaDNS-C/archive
@@ -41,7 +41,7 @@ define Package/ChinaDNS-C/install
 	$(INSTALL_CONF) ../iplist.txt $(1)/etc/chinadns_iplist.txt
 	$(INSTALL_BIN) ./files/chinadns.init $(1)/etc/init.d/chinadns
 	$(INSTALL_DIR) $(1)/usr/bin
-	$(INSTALL_BIN) $(PKG_BUILD_DIR)/chinadns $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/src/chinadns $(1)/usr/bin
 endef
 
 $(eval $(call BuildPackage,ChinaDNS-C))
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..1292e9f
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,5 @@
+bin_PROGRAMS = chinadns
+
+chinadns_SOURCES = chinadns.c
+
+chinadns_LDADD = -lresolv
diff --git a/src/chinadns.c b/src/chinadns.c
index e972c3d..8b8792c 100644
--- a/src/chinadns.c
+++ b/src/chinadns.c
@@ -11,6 +11,10 @@
 #include <sys/socket.h>
 #include <sys/types.h>
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 typedef struct {
   time_t ts;
   char *buf;
@@ -36,7 +40,11 @@ static char global_buf[BUF_SIZE];
 
 static int verbose = 0;
 
-static const char *version = "ChinaDNS 1.0.0";
+#if defined(PACKAGE_STRING)
+static const char *version = PACKAGE_STRING;
+#else
+static const char *version = "ChinaDNS";
+#endif
 
 static const char *default_dns_servers =
   "114.114.114.114,8.8.8.8,208.67.222.222";