diff --git a/Makefile.in b/Makefile.in
index fefbb7de..52f46341 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -78,6 +78,7 @@ PRE_UNINSTALL = :
 POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
+@ENABLE_DOCUMENTATION_TRUE@am__append_1 = doc
 subdir = .
 DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am \
 	$(top_srcdir)/configure $(am__configure_deps) \
@@ -251,7 +252,6 @@ CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
-DISABLE_DOCUMENTATION = @DISABLE_DOCUMENTATION@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
@@ -361,8 +361,10 @@ target_alias = @target_alias@
 top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-@USE_SYSTEM_SHARED_LIB_FALSE@SUBDIRS = libsodium libcork libipset libudns libev src doc
-@USE_SYSTEM_SHARED_LIB_TRUE@SUBDIRS = libcork libipset src doc
+@USE_SYSTEM_SHARED_LIB_FALSE@SUBDIRS = libsodium libcork libipset \
+@USE_SYSTEM_SHARED_LIB_FALSE@	libudns libev src $(am__append_1)
+@USE_SYSTEM_SHARED_LIB_TRUE@SUBDIRS = libcork libipset src \
+@USE_SYSTEM_SHARED_LIB_TRUE@	$(am__append_1)
 ACLOCAL_AMFLAGS = -I m4
 pkgconfiglibdir = $(libdir)/pkgconfig
 pkgconfiglib_DATA = shadowsocks-libev.pc
@@ -421,8 +423,8 @@ distclean-hdr:
 	-rm -f config.h stamp-h1
 shadowsocks-libev.pc: $(top_builddir)/config.status $(srcdir)/shadowsocks-libev.pc.in
 	cd $(top_builddir) && $(SHELL) ./config.status $@
-doc/Makefile: $(top_builddir)/config.status $(top_srcdir)/doc/Makefile.in
-	cd $(top_builddir) && $(SHELL) ./config.status $@
+@ENABLE_DOCUMENTATION_TRUE@doc/Makefile: $(top_builddir)/config.status $(top_srcdir)/doc/Makefile.in
+@ENABLE_DOCUMENTATION_TRUE@	cd $(top_builddir) && $(SHELL) ./config.status $@
 
 mostlyclean-libtool:
 	-rm -f *.lo
diff --git a/configure b/configure
index 77f42488..1907aea0 100755
--- a/configure
+++ b/configure
@@ -653,7 +653,8 @@ RM
 GZIP
 XMLTO
 ASCIIDOC
-DISABLE_DOCUMENTATION
+ENABLE_DOCUMENTATION_FALSE
+ENABLE_DOCUMENTATION_TRUE
 USE_SYSTEM_SHARED_LIB_FALSE
 USE_SYSTEM_SHARED_LIB_TRUE
 OTOOL64
@@ -12034,19 +12035,22 @@ fi
 
 # Check whether --enable-documentation was given.
 if test "${enable_documentation+set}" = set; then :
-  enableval=$enable_documentation;
+  enableval=$enable_documentation; disable_documentation=true
 else
-  enable_documentation=yes
+  disable_documentation=false
 fi
 
-if test "x$enable_documentation" = xyes; then :
-  DISABLE_DOCUMENTATION=0
+ if test x$disable_documentation = xfalse; then
+  ENABLE_DOCUMENTATION_TRUE=
+  ENABLE_DOCUMENTATION_FALSE='#'
 else
-  DISABLE_DOCUMENTATION=1
+  ENABLE_DOCUMENTATION_TRUE='#'
+  ENABLE_DOCUMENTATION_FALSE=
 fi
 
 
-if test "x$enable_documentation" = xyes; then
+if test -z "$ENABLE_DOCUMENTATION_TRUE"; then :
+
   # Extract the first word of "asciidoc", so it can be a program name with args.
 set dummy asciidoc; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -12170,6 +12174,88 @@ $as_echo "no" >&6; }
 fi
 
 
+  # Extract the first word of "rm", so it can be a program name with args.
+set dummy rm; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_RM+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $RM in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_RM="$RM" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_RM="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  test -z "$ac_cv_path_RM" && ac_cv_path_RM="rm"
+  ;;
+esac
+fi
+RM=$ac_cv_path_RM
+if test -n "$RM"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RM" >&5
+$as_echo "$RM" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  # Extract the first word of "mv", so it can be a program name with args.
+set dummy mv; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_MV+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $MV in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_MV="$MV" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_MV="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  test -z "$ac_cv_path_MV" && ac_cv_path_MV="mv"
+  ;;
+esac
+fi
+MV=$ac_cv_path_MV
+if test -n "$MV"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MV" >&5
+$as_echo "$MV" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
 $as_echo_n "checking for a sed that does not truncate output... " >&6; }
 if ${ac_cv_path_SED+:} false; then :
@@ -12239,6 +12325,7 @@ $as_echo "$ac_cv_path_SED" >&6; }
  SED="$ac_cv_path_SED"
   rm -f conftest.sed
 
+
 fi
 
 ac_ext=c
@@ -12885,88 +12972,6 @@ $as_echo "no" >&6; }
 fi
 
 
-# Extract the first word of "rm", so it can be a program name with args.
-set dummy rm; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_RM+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  case $RM in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_RM="$RM" # Let the user override the test with a path.
-  ;;
-  *)
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_RM="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  test -z "$ac_cv_path_RM" && ac_cv_path_RM="rm"
-  ;;
-esac
-fi
-RM=$ac_cv_path_RM
-if test -n "$RM"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $RM" >&5
-$as_echo "$RM" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-# Extract the first word of "mv", so it can be a program name with args.
-set dummy mv; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_path_MV+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  case $MV in
-  [\\/]* | ?:[\\/]*)
-  ac_cv_path_MV="$MV" # Let the user override the test with a path.
-  ;;
-  *)
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_path_MV="$as_dir/$ac_word$ac_exec_ext"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-  test -z "$ac_cv_path_MV" && ac_cv_path_MV="mv"
-  ;;
-esac
-fi
-MV=$ac_cv_path_MV
-if test -n "$MV"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MV" >&5
-$as_echo "$MV" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
 
 if test -z "$USE_SYSTEM_SHARED_LIB_TRUE"; then :
   else
@@ -15884,13 +15889,20 @@ if test -z "$USE_SYSTEM_SHARED_LIB_TRUE"; then :
 
 fi
 
-ac_config_files="$ac_config_files shadowsocks-libev.pc Makefile libcork/Makefile libipset/Makefile src/Makefile doc/Makefile"
+ac_config_files="$ac_config_files shadowsocks-libev.pc Makefile libcork/Makefile libipset/Makefile src/Makefile"
 
 if test -z "$USE_SYSTEM_SHARED_LIB_TRUE"; then :
   else
   ac_config_files="$ac_config_files libudns/Makefile libev/Makefile"
 
 fi
+
+if test -z "$ENABLE_DOCUMENTATION_TRUE"; then :
+  ac_config_files="$ac_config_files doc/Makefile"
+
+
+fi
+
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
@@ -16036,6 +16048,10 @@ if test -z "${USE_SYSTEM_SHARED_LIB_TRUE}" && test -z "${USE_SYSTEM_SHARED_LIB_F
   as_fn_error $? "conditional \"USE_SYSTEM_SHARED_LIB\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${ENABLE_DOCUMENTATION_TRUE}" && test -z "${ENABLE_DOCUMENTATION_FALSE}"; then
+  as_fn_error $? "conditional \"ENABLE_DOCUMENTATION\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 if test -z "${BUILD_REDIRECTOR_TRUE}" && test -z "${BUILD_REDIRECTOR_FALSE}"; then
   as_fn_error $? "conditional \"BUILD_REDIRECTOR\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
@@ -16922,9 +16938,9 @@ do
     "libcork/Makefile") CONFIG_FILES="$CONFIG_FILES libcork/Makefile" ;;
     "libipset/Makefile") CONFIG_FILES="$CONFIG_FILES libipset/Makefile" ;;
     "src/Makefile") CONFIG_FILES="$CONFIG_FILES src/Makefile" ;;
-    "doc/Makefile") CONFIG_FILES="$CONFIG_FILES doc/Makefile" ;;
     "libudns/Makefile") CONFIG_FILES="$CONFIG_FILES libudns/Makefile" ;;
     "libev/Makefile") CONFIG_FILES="$CONFIG_FILES libev/Makefile" ;;
+    "doc/Makefile") CONFIG_FILES="$CONFIG_FILES doc/Makefile" ;;
 
   *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
   esac
diff --git a/libcork/Makefile.in b/libcork/Makefile.in
index bcd8b4c2..ad54af2c 100644
--- a/libcork/Makefile.in
+++ b/libcork/Makefile.in
@@ -220,7 +220,6 @@ CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
-DISABLE_DOCUMENTATION = @DISABLE_DOCUMENTATION@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
diff --git a/libev/Makefile.in b/libev/Makefile.in
index 966481de..fd30b10a 100644
--- a/libev/Makefile.in
+++ b/libev/Makefile.in
@@ -187,7 +187,6 @@ CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
-DISABLE_DOCUMENTATION = @DISABLE_DOCUMENTATION@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
diff --git a/libipset/Makefile.in b/libipset/Makefile.in
index 42272dd7..7512b254 100644
--- a/libipset/Makefile.in
+++ b/libipset/Makefile.in
@@ -216,7 +216,6 @@ CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
-DISABLE_DOCUMENTATION = @DISABLE_DOCUMENTATION@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
diff --git a/libudns/Makefile.in b/libudns/Makefile.in
index 0029f297..23f8555f 100644
--- a/libudns/Makefile.in
+++ b/libudns/Makefile.in
@@ -208,7 +208,6 @@ CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
-DISABLE_DOCUMENTATION = @DISABLE_DOCUMENTATION@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
diff --git a/src/Makefile.in b/src/Makefile.in
index 0a9da1ad..bc9c24a4 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -335,7 +335,6 @@ CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
 DEPDIR = @DEPDIR@
-DISABLE_DOCUMENTATION = @DISABLE_DOCUMENTATION@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@