Remove autotools

39 files changed, 0 insertions, 4070 deletions

diff --git a/m4/.gitignore b/m4/.gitignore
deleted file mode 100644
index be71f496..00000000
--- a/m4/.gitignore
+++ /dev/null
@@ -1,7 +0,0 @@
-gnulib-comp.m4
-gtk-doc.m4
-libtool.m4
-ltoptions.m4
-ltsugar.m4
-ltversion.m4
-lt~obsolete.m4
diff --git a/m4/00gnulib.m4 b/m4/00gnulib.m4
deleted file mode 100644
index 8eca5518..00000000
--- a/m4/00gnulib.m4
+++ /dev/null
@@ -1,46 +0,0 @@
-# 00gnulib.m4 serial 3
-dnl Copyright (C) 2009-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl This file must be named something that sorts before all other
-dnl gnulib-provided .m4 files.  It is needed until such time as we can
-dnl assume Autoconf 2.64, with its improved AC_DEFUN_ONCE and
-dnl m4_divert semantics.
-
-# Until autoconf 2.63, handling of the diversion stack required m4_init
-# to be called first; but this does not happen with aclocal.  Wrapping
-# the entire execution in another layer of the diversion stack fixes this.
-# Worse, prior to autoconf 2.62, m4_wrap depended on the underlying m4
-# for whether it was FIFO or LIFO; in order to properly balance with
-# m4_init, we need to undo our push just before anything wrapped within
-# the m4_init body.  The way to ensure this is to wrap both sides of
-# m4_init with a one-shot macro that does the pop at the right time.
-m4_ifndef([_m4_divert_diversion],
-[m4_divert_push([KILL])
-m4_define([gl_divert_fixup], [m4_divert_pop()m4_define([$0])])
-m4_define([m4_init],
-  [gl_divert_fixup()]m4_defn([m4_init])[gl_divert_fixup()])])
-
-
-# AC_DEFUN_ONCE([NAME], VALUE)
-# ----------------------------
-# Define NAME to expand to VALUE on the first use (whether by direct
-# expansion, or by AC_REQUIRE), and to nothing on all subsequent uses.
-# Avoid bugs in AC_REQUIRE in Autoconf 2.63 and earlier.  This
-# definition is slower than the version in Autoconf 2.64, because it
-# can only use interfaces that existed since 2.59; but it achieves the
-# same effect.  Quoting is necessary to avoid confusing Automake.
-m4_version_prereq([2.63.263], [],
-[m4_define([AC][_DEFUN_ONCE],
-  [AC][_DEFUN([$1],
-    [AC_REQUIRE([_gl_DEFUN_ONCE([$1])],
-      [m4_indir([_gl_DEFUN_ONCE([$1])])])])]dnl
-[AC][_DEFUN([_gl_DEFUN_ONCE([$1])], [$2])])])
-
-# gl_00GNULIB
-# -----------
-# Witness macro that this file has been included.  Needed to force
-# Automake to include this file prior to all other gnulib .m4 files.
-AC_DEFUN([gl_00GNULIB])
diff --git a/m4/absolute-header.m4 b/m4/absolute-header.m4
deleted file mode 100644
index ce3e39e9..00000000
--- a/m4/absolute-header.m4
+++ /dev/null
@@ -1,102 +0,0 @@
-# absolute-header.m4 serial 16
-dnl Copyright (C) 2006-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl From Derek Price.
-
-# gl_ABSOLUTE_HEADER(HEADER1 HEADER2 ...)
-# ---------------------------------------
-# Find the absolute name of a header file, testing first if the header exists.
-# If the header were sys/inttypes.h, this macro would define
-# ABSOLUTE_SYS_INTTYPES_H to the '""' quoted absolute name of sys/inttypes.h
-# in config.h
-# (e.g. '#define ABSOLUTE_SYS_INTTYPES_H "///usr/include/sys/inttypes.h"').
-# The three "///" are to pacify Sun C 5.8, which otherwise would say
-# "warning: #include of /usr/include/... may be non-portable".
-# Use '""', not '<>', so that the /// cannot be confused with a C99 comment.
-# Note: This macro assumes that the header file is not empty after
-# preprocessing, i.e. it does not only define preprocessor macros but also
-# provides some type/enum definitions or function/variable declarations.
-AC_DEFUN([gl_ABSOLUTE_HEADER],
-[AC_REQUIRE([AC_CANONICAL_HOST])
-AC_LANG_PREPROC_REQUIRE()dnl
-dnl FIXME: gl_absolute_header and ac_header_exists must be used unquoted
-dnl until we can assume autoconf 2.64 or newer.
-m4_foreach_w([gl_HEADER_NAME], [$1],
-  [AS_VAR_PUSHDEF([gl_absolute_header],
-                  [gl_cv_absolute_]m4_defn([gl_HEADER_NAME]))dnl
-  AC_CACHE_CHECK([absolute name of <]m4_defn([gl_HEADER_NAME])[>],
-    m4_defn([gl_absolute_header]),
-    [AS_VAR_PUSHDEF([ac_header_exists],
-                    [ac_cv_header_]m4_defn([gl_HEADER_NAME]))dnl
-    AC_CHECK_HEADERS_ONCE(m4_defn([gl_HEADER_NAME]))dnl
-    if test AS_VAR_GET(ac_header_exists) = yes; then
-      gl_ABSOLUTE_HEADER_ONE(m4_defn([gl_HEADER_NAME]))
-    fi
-    AS_VAR_POPDEF([ac_header_exists])dnl
-    ])dnl
-  AC_DEFINE_UNQUOTED(AS_TR_CPP([ABSOLUTE_]m4_defn([gl_HEADER_NAME])),
-                     ["AS_VAR_GET(gl_absolute_header)"],
-                     [Define this to an absolute name of <]m4_defn([gl_HEADER_NAME])[>.])
-  AS_VAR_POPDEF([gl_absolute_header])dnl
-])dnl
-])# gl_ABSOLUTE_HEADER
-
-# gl_ABSOLUTE_HEADER_ONE(HEADER)
-# ------------------------------
-# Like gl_ABSOLUTE_HEADER, except that:
-#   - it assumes that the header exists,
-#   - it uses the current CPPFLAGS,
-#   - it does not cache the result,
-#   - it is silent.
-AC_DEFUN([gl_ABSOLUTE_HEADER_ONE],
-[
-  AC_REQUIRE([AC_CANONICAL_HOST])
-  AC_LANG_CONFTEST([AC_LANG_SOURCE([[#include <]]m4_dquote([$1])[[>]])])
-  dnl AIX "xlc -E" and "cc -E" omit #line directives for header files
-  dnl that contain only a #include of other header files and no
-  dnl non-comment tokens of their own. This leads to a failure to
-  dnl detect the absolute name of <dirent.h>, <signal.h>, <poll.h>
-  dnl and others. The workaround is to force preservation of comments
-  dnl through option -C. This ensures all necessary #line directives
-  dnl are present. GCC supports option -C as well.
-  case "$host_os" in
-    aix*) gl_absname_cpp="$ac_cpp -C" ;;
-    *)    gl_absname_cpp="$ac_cpp" ;;
-  esac
-changequote(,)
-  case "$host_os" in
-    mingw*)
-      dnl For the sake of native Windows compilers (excluding gcc),
-      dnl treat backslash as a directory separator, like /.
-      dnl Actually, these compilers use a double-backslash as
-      dnl directory separator, inside the
-      dnl   # line "filename"
-      dnl directives.
-      gl_dirsep_regex='[/\\]'
-      ;;
-    *)
-      gl_dirsep_regex='\/'
-      ;;
-  esac
-  dnl A sed expression that turns a string into a basic regular
-  dnl expression, for use within "/.../".
-  gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
-  gl_header_literal_regex=`echo '$1' \
-                           | sed -e "$gl_make_literal_regex_sed"`
-  gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
-      s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
-      s|^/[^/]|//&|
-      p
-      q
-    }'
-changequote([,])
-  dnl eval is necessary to expand gl_absname_cpp.
-  dnl Ultrix and Pyramid sh refuse to redirect output of eval,
-  dnl so use subshell.
-  AS_VAR_SET([gl_cv_absolute_]AS_TR_SH([[$1]]),
-[`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
-  sed -n "$gl_absolute_header_sed"`])
-])
diff --git a/m4/ax_with_curses.m4 b/m4/ax_with_curses.m4
deleted file mode 100644
index 33a37ac9..00000000
--- a/m4/ax_with_curses.m4
+++ /dev/null
@@ -1,518 +0,0 @@
-# ===========================================================================
-#      http://www.gnu.org/software/autoconf-archive/ax_with_curses.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_WITH_CURSES
-#
-# DESCRIPTION
-#
-#   This macro checks whether a SysV or X/Open-compatible Curses library is
-#   present, along with the associated header file.  The NcursesW
-#   (wide-character) library is searched for first, followed by Ncurses,
-#   then the system-default plain Curses.  The first library found is the
-#   one returned.
-#
-#   The following options are understood: --with-ncursesw, --with-ncurses,
-#   --without-ncursesw, --without-ncurses.  The "--with" options force the
-#   macro to use that particular library, terminating with an error if not
-#   found.  The "--without" options simply skip the check for that library.
-#   The effect on the search pattern is:
-#
-#     (no options)                           - NcursesW, Ncurses, Curses
-#     --with-ncurses     --with-ncursesw     - NcursesW only [*]
-#     --without-ncurses  --with-ncursesw     - NcursesW only [*]
-#                        --with-ncursesw     - NcursesW only [*]
-#     --with-ncurses     --without-ncursesw  - Ncurses only [*]
-#     --with-ncurses                         - NcursesW, Ncurses [**]
-#     --without-ncurses  --without-ncursesw  - Curses only
-#                        --without-ncursesw  - Ncurses, Curses
-#     --without-ncurses                      - NcursesW, Curses
-#
-#   [*]  If the library is not found, abort the configure script.
-#
-#   [**] If the second library (Ncurses) is not found, abort configure.
-#
-#   The following preprocessor symbols may be defined by this macro if the
-#   appropriate conditions are met:
-#
-#     HAVE_CURSES             - if any SysV or X/Open Curses library found
-#     HAVE_CURSES_ENHANCED    - if library supports X/Open Enhanced functions
-#     HAVE_CURSES_COLOR       - if library supports color (enhanced functions)
-#     HAVE_CURSES_OBSOLETE    - if library supports certain obsolete features
-#     HAVE_NCURSESW           - if NcursesW (wide char) library is to be used
-#     HAVE_NCURSES            - if the Ncurses library is to be used
-#
-#     HAVE_CURSES_H           - if <curses.h> is present and should be used
-#     HAVE_NCURSESW_H         - if <ncursesw.h> should be used
-#     HAVE_NCURSES_H          - if <ncurses.h> should be used
-#     HAVE_NCURSESW_CURSES_H  - if <ncursesw/curses.h> should be used
-#     HAVE_NCURSES_CURSES_H   - if <ncurses/curses.h> should be used
-#
-#   (These preprocessor symbols are discussed later in this document.)
-#
-#   The following output variable is defined by this macro; it is precious
-#   and may be overridden on the ./configure command line:
-#
-#     CURSES_LIB  - library to add to xxx_LDADD
-#
-#   The library listed in CURSES_LIB is NOT added to LIBS by default. You
-#   need to add CURSES_LIB to the appropriate xxx_LDADD line in your
-#   Makefile.am.  For example:
-#
-#     prog_LDADD = @CURSES_LIB@
-#
-#   If CURSES_LIB is set on the configure command line (such as by running
-#   "./configure CURSES_LIB=-lmycurses"), then the only header searched for
-#   is <curses.h>.  The user may use the CPPFLAGS precious variable to
-#   override the standard #include search path.  If the user needs to
-#   specify an alternative path for a library (such as for a non-standard
-#   NcurseW), the user should use the LDFLAGS variable.
-#
-#   The following shell variables may be defined by this macro:
-#
-#     ax_cv_curses           - set to "yes" if any Curses library found
-#     ax_cv_curses_enhanced  - set to "yes" if Enhanced functions present
-#     ax_cv_curses_color     - set to "yes" if color functions present
-#     ax_cv_curses_obsolete  - set to "yes" if obsolete features present
-#
-#     ax_cv_ncursesw      - set to "yes" if NcursesW library found
-#     ax_cv_ncurses       - set to "yes" if Ncurses library found
-#     ax_cv_plaincurses   - set to "yes" if plain Curses library found
-#     ax_cv_curses_which  - set to "ncursesw", "ncurses", "plaincurses" or "no"
-#
-#   These variables can be used in your configure.ac to determine the level
-#   of support you need from the Curses library.  For example, if you must
-#   have either Ncurses or NcursesW, you could include:
-#
-#     AX_WITH_CURSES
-#     if test "x$ax_cv_ncursesw" != xyes && test "x$ax_cv_ncurses" != xyes; then
-#         AX_MSG_ERROR([requires either NcursesW or Ncurses library])
-#     fi
-#
-#   If any Curses library will do (but one must be present and must support
-#   color), you could use:
-#
-#     AX_WITH_CURSES
-#     if test "x$ax_cv_curses" != xyes || test "x$ax_cv_curses_color" != xyes; then
-#         AC_MSG_ERROR([requires an X/Open-compatible Curses library with color])
-#     fi
-#
-#   Certain preprocessor symbols and shell variables defined by this macro
-#   can be used to determine various features of the Curses library.  In
-#   particular, HAVE_CURSES and ax_cv_curses are defined if the Curses
-#   library found conforms to the traditional SysV and/or X/Open Base Curses
-#   definition.  Any working Curses library conforms to this level.
-#
-#   HAVE_CURSES_ENHANCED and ax_cv_curses_enhanced are defined if the
-#   library supports the X/Open Enhanced Curses definition.  In particular,
-#   the wide-character types attr_t, cchar_t and wint_t, the functions
-#   wattr_set() and wget_wch() and the macros WA_NORMAL and _XOPEN_CURSES
-#   are checked.  The Ncurses library does NOT conform to this definition,
-#   although NcursesW does.
-#
-#   HAVE_CURSES_COLOR and ax_cv_curses_color are defined if the library
-#   supports color functions and macros such as COLOR_PAIR, A_COLOR,
-#   COLOR_WHITE, COLOR_RED and init_pair().  These are NOT part of the
-#   X/Open Base Curses definition, but are part of the Enhanced set of
-#   functions.  The Ncurses library DOES support these functions, as does
-#   NcursesW.
-#
-#   HAVE_CURSES_OBSOLETE and ax_cv_curses_obsolete are defined if the
-#   library supports certain features present in SysV and BSD Curses but not
-#   defined in the X/Open definition.  In particular, the functions
-#   getattrs(), getcurx() and getmaxx() are checked.
-#
-#   To use the HAVE_xxx_H preprocessor symbols, insert the following into
-#   your system.h (or equivalent) header file:
-#
-#     #if defined HAVE_NCURSESW_CURSES_H
-#     #  include <ncursesw/curses.h>
-#     #elif defined HAVE_NCURSESW_H
-#     #  include <ncursesw.h>
-#     #elif defined HAVE_NCURSES_CURSES_H
-#     #  include <ncurses/curses.h>
-#     #elif defined HAVE_NCURSES_H
-#     #  include <ncurses.h>
-#     #elif defined HAVE_CURSES_H
-#     #  include <curses.h>
-#     #else
-#     #  error "SysV or X/Open-compatible Curses header file required"
-#     #endif
-#
-#   For previous users of this macro: you should not need to change anything
-#   in your configure.ac or Makefile.am, as the previous (serial 10)
-#   semantics are still valid.  However, you should update your system.h (or
-#   equivalent) header file to the fragment shown above. You are encouraged
-#   also to make use of the extended functionality provided by this version
-#   of AX_WITH_CURSES, as well as in the additional macros
-#   AX_WITH_CURSES_PANEL, AX_WITH_CURSES_MENU and AX_WITH_CURSES_FORM.
-#
-# LICENSE
-#
-#   Copyright (c) 2009 Mark Pulford <mark@kyne.com.au>
-#   Copyright (c) 2009 Damian Pietras <daper@daper.net>
-#   Copyright (c) 2012 Reuben Thomas <rrt@sc3d.org>
-#   Copyright (c) 2011 John Zaitseff <J.Zaitseff@zap.org.au>
-#
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
-
-#serial 13
-
-AU_ALIAS([MP_WITH_CURSES], [AX_WITH_CURSES])
-AC_DEFUN([AX_WITH_CURSES], [
-    AC_ARG_VAR([CURSES_LIB], [linker library for Curses, e.g. -lcurses])
-    AC_ARG_WITH([ncurses], [AS_HELP_STRING([--with-ncurses],
-        [force the use of Ncurses or NcursesW])],
-        [], [with_ncurses=check])
-    AC_ARG_WITH([ncursesw], [AS_HELP_STRING([--without-ncursesw],
-        [do not use NcursesW (wide character support)])],
-        [], [with_ncursesw=check])
-
-    ax_saved_LIBS=$LIBS
-    AS_IF([test "x$with_ncurses" = xyes || test "x$with_ncursesw" = xyes],
-        [ax_with_plaincurses=no], [ax_with_plaincurses=check])
-
-    ax_cv_curses_which=no
-
-    # Test for NcursesW
-
-    AS_IF([test "x$CURSES_LIB" = x && test "x$with_ncursesw" != xno], [
-        LIBS="$ax_saved_LIBS -lncursesw"
-
-        AC_CACHE_CHECK([for NcursesW wide-character library], [ax_cv_ncursesw], [
-            AC_LINK_IFELSE([AC_LANG_CALL([], [initscr])],
-                [ax_cv_ncursesw=yes], [ax_cv_ncursesw=no])
-        ])
-        AS_IF([test "x$ax_cv_ncursesw" = xno && test "x$with_ncursesw" = xyes], [
-            AC_MSG_ERROR([--with-ncursesw specified but could not find NcursesW library])
-        ])
-
-        AS_IF([test "x$ax_cv_ncursesw" = xyes], [
-            ax_cv_curses=yes
-            ax_cv_curses_which=ncursesw
-            CURSES_LIB="-lncursesw"
-            AC_DEFINE([HAVE_NCURSESW], [1], [Define to 1 if the NcursesW library is present])
-            AC_DEFINE([HAVE_CURSES],   [1], [Define to 1 if a SysV or X/Open compatible Curses library is present])
-
-            AC_CACHE_CHECK([for working ncursesw/curses.h], [ax_cv_header_ncursesw_curses_h], [
-                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-                        @%:@define _XOPEN_SOURCE_EXTENDED 1
-                        @%:@include <ncursesw/curses.h>
-                    ]], [[
-                        chtype a = A_BOLD;
-                        int b = KEY_LEFT;
-                        chtype c = COLOR_PAIR(1) & A_COLOR;
-                        attr_t d = WA_NORMAL;
-                        cchar_t e;
-                        wint_t f;
-                        int g = getattrs(stdscr);
-                        int h = getcurx(stdscr) + getmaxx(stdscr);
-                        initscr();
-                        init_pair(1, COLOR_WHITE, COLOR_RED);
-                        wattr_set(stdscr, d, 0, NULL);
-                        wget_wch(stdscr, &f);
-                    ]])],
-                    [ax_cv_header_ncursesw_curses_h=yes],
-                    [ax_cv_header_ncursesw_curses_h=no])
-            ])
-            AS_IF([test "x$ax_cv_header_ncursesw_curses_h" = xyes], [
-                ax_cv_curses_enhanced=yes
-                ax_cv_curses_color=yes
-                ax_cv_curses_obsolete=yes
-                AC_DEFINE([HAVE_CURSES_ENHANCED],   [1], [Define to 1 if library supports X/Open Enhanced functions])
-                AC_DEFINE([HAVE_CURSES_COLOR],      [1], [Define to 1 if library supports color (enhanced functions)])
-                AC_DEFINE([HAVE_CURSES_OBSOLETE],   [1], [Define to 1 if library supports certain obsolete features])
-                AC_DEFINE([HAVE_NCURSESW_CURSES_H], [1], [Define to 1 if <ncursesw/curses.h> is present])
-            ])
-
-            AC_CACHE_CHECK([for working ncursesw.h], [ax_cv_header_ncursesw_h], [
-                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-                        @%:@define _XOPEN_SOURCE_EXTENDED 1
-                        @%:@include <ncursesw.h>
-                    ]], [[
-                        chtype a = A_BOLD;
-                        int b = KEY_LEFT;
-                        chtype c = COLOR_PAIR(1) & A_COLOR;
-                        attr_t d = WA_NORMAL;
-                        cchar_t e;
-                        wint_t f;
-                        int g = getattrs(stdscr);
-                        int h = getcurx(stdscr) + getmaxx(stdscr);
-                        initscr();
-                        init_pair(1, COLOR_WHITE, COLOR_RED);
-                        wattr_set(stdscr, d, 0, NULL);
-                        wget_wch(stdscr, &f);
-                    ]])],
-                    [ax_cv_header_ncursesw_h=yes],
-                    [ax_cv_header_ncursesw_h=no])
-            ])
-            AS_IF([test "x$ax_cv_header_ncursesw_h" = xyes], [
-                ax_cv_curses_enhanced=yes
-                ax_cv_curses_color=yes
-                ax_cv_curses_obsolete=yes
-                AC_DEFINE([HAVE_CURSES_ENHANCED], [1], [Define to 1 if library supports X/Open Enhanced functions])
-                AC_DEFINE([HAVE_CURSES_COLOR],    [1], [Define to 1 if library supports color (enhanced functions)])
-                AC_DEFINE([HAVE_CURSES_OBSOLETE], [1], [Define to 1 if library supports certain obsolete features])
-                AC_DEFINE([HAVE_NCURSESW_H],      [1], [Define to 1 if <ncursesw.h> is present])
-            ])
-
-            AC_CACHE_CHECK([for working ncurses.h], [ax_cv_header_ncurses_h_with_ncursesw], [
-                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-                        @%:@define _XOPEN_SOURCE_EXTENDED 1
-                        @%:@include <ncurses.h>
-                    ]], [[
-                        chtype a = A_BOLD;
-                        int b = KEY_LEFT;
-                        chtype c = COLOR_PAIR(1) & A_COLOR;
-                        attr_t d = WA_NORMAL;
-                        cchar_t e;
-                        wint_t f;
-                        int g = getattrs(stdscr);
-                        int h = getcurx(stdscr) + getmaxx(stdscr);
-                        initscr();
-                        init_pair(1, COLOR_WHITE, COLOR_RED);
-                        wattr_set(stdscr, d, 0, NULL);
-                        wget_wch(stdscr, &f);
-                    ]])],
-                    [ax_cv_header_ncurses_h_with_ncursesw=yes],
-                    [ax_cv_header_ncurses_h_with_ncursesw=no])
-            ])
-            AS_IF([test "x$ax_cv_header_ncurses_h_with_ncursesw" = xyes], [
-                ax_cv_curses_enhanced=yes
-                ax_cv_curses_color=yes
-                ax_cv_curses_obsolete=yes
-                AC_DEFINE([HAVE_CURSES_ENHANCED], [1], [Define to 1 if library supports X/Open Enhanced functions])
-                AC_DEFINE([HAVE_CURSES_COLOR],    [1], [Define to 1 if library supports color (enhanced functions)])
-                AC_DEFINE([HAVE_CURSES_OBSOLETE], [1], [Define to 1 if library supports certain obsolete features])
-                AC_DEFINE([HAVE_NCURSES_H],       [1], [Define to 1 if <ncurses.h> is present])
-            ])
-
-            AS_IF([test "x$ax_cv_header_ncursesw_curses_h" = xno && test "x$ax_cv_header_ncursesw_h" = xno && test "x$ax_cv_header_ncurses_h_with_ncursesw" = xno], [
-                AC_MSG_WARN([could not find a working ncursesw/curses.h, ncursesw.h or ncurses.h])
-            ])
-        ])
-    ])
-
-    # Test for Ncurses
-
-    AS_IF([test "x$CURSES_LIB" = x && test "x$with_ncurses" != xno && test "x$ax_cv_curses_which" = xno], [
-        LIBS="$ax_saved_LIBS -lncurses"
-
-        AC_CACHE_CHECK([for Ncurses library], [ax_cv_ncurses], [
-            AC_LINK_IFELSE([AC_LANG_CALL([], [initscr])],
-                [ax_cv_ncurses=yes], [ax_cv_ncurses=no])
-        ])
-        AS_IF([test "x$ax_cv_ncurses" = xno && test "x$with_ncurses" = xyes], [
-            AC_MSG_ERROR([--with-ncurses specified but could not find Ncurses library])
-        ])
-
-        AS_IF([test "x$ax_cv_ncurses" = xyes], [
-            ax_cv_curses=yes
-            ax_cv_curses_which=ncurses
-            CURSES_LIB="-lncurses"
-            AC_DEFINE([HAVE_NCURSES], [1], [Define to 1 if the Ncurses library is present])
-            AC_DEFINE([HAVE_CURSES],  [1], [Define to 1 if a SysV or X/Open compatible Curses library is present])
-
-            AC_CACHE_CHECK([for working ncurses/curses.h], [ax_cv_header_ncurses_curses_h], [
-                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-                        @%:@include <ncurses/curses.h>
-                    ]], [[
-                        chtype a = A_BOLD;
-                        int b = KEY_LEFT;
-                        chtype c = COLOR_PAIR(1) & A_COLOR;
-                        int g = getattrs(stdscr);
-                        int h = getcurx(stdscr) + getmaxx(stdscr);
-                        initscr();
-                        init_pair(1, COLOR_WHITE, COLOR_RED);
-                    ]])],
-                    [ax_cv_header_ncurses_curses_h=yes],
-                    [ax_cv_header_ncurses_curses_h=no])
-            ])
-            AS_IF([test "x$ax_cv_header_ncurses_curses_h" = xyes], [
-                ax_cv_curses_color=yes
-                ax_cv_curses_obsolete=yes
-                AC_DEFINE([HAVE_CURSES_COLOR],     [1], [Define to 1 if library supports color (enhanced functions)])
-                AC_DEFINE([HAVE_CURSES_OBSOLETE],  [1], [Define to 1 if library supports certain obsolete features])
-                AC_DEFINE([HAVE_NCURSES_CURSES_H], [1], [Define to 1 if <ncurses/curses.h> is present])
-            ])
-
-            AC_CACHE_CHECK([for working ncurses.h], [ax_cv_header_ncurses_h], [
-                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-                        @%:@include <ncurses.h>
-                    ]], [[
-                        chtype a = A_BOLD;
-                        int b = KEY_LEFT;
-                        chtype c = COLOR_PAIR(1) & A_COLOR;
-                        int g = getattrs(stdscr);
-                        int h = getcurx(stdscr) + getmaxx(stdscr);
-                        initscr();
-                        init_pair(1, COLOR_WHITE, COLOR_RED);
-                    ]])],
-                    [ax_cv_header_ncurses_h=yes],
-                    [ax_cv_header_ncurses_h=no])
-            ])
-            AS_IF([test "x$ax_cv_header_ncurses_h" = xyes], [
-                ax_cv_curses_color=yes
-                ax_cv_curses_obsolete=yes
-                AC_DEFINE([HAVE_CURSES_COLOR],    [1], [Define to 1 if library supports color (enhanced functions)])
-                AC_DEFINE([HAVE_CURSES_OBSOLETE], [1], [Define to 1 if library supports certain obsolete features])
-                AC_DEFINE([HAVE_NCURSES_H],       [1], [Define to 1 if <ncurses.h> is present])
-            ])
-
-            AS_IF([test "x$ax_cv_header_ncurses_curses_h" = xno && test "x$ax_cv_header_ncurses_h" = xno], [
-                AC_MSG_WARN([could not find a working ncurses/curses.h or ncurses.h])
-            ])
-        ])
-    ])
-
-    # Test for plain Curses (or if CURSES_LIB was set by user)
-
-    AS_IF([test "x$with_plaincurses" != xno && test "x$ax_cv_curses_which" = xno], [
-        AS_IF([test "x$CURSES_LIB" != x], [
-            LIBS="$ax_saved_LIBS $CURSES_LIB"
-        ], [
-            LIBS="$ax_saved_LIBS -lcurses"
-        ])
-
-        AC_CACHE_CHECK([for Curses library], [ax_cv_plaincurses], [
-            AC_LINK_IFELSE([AC_LANG_CALL([], [initscr])],
-                [ax_cv_plaincurses=yes], [ax_cv_plaincurses=no])
-        ])
-
-        AS_IF([test "x$ax_cv_plaincurses" = xyes], [
-            ax_cv_curses=yes
-            ax_cv_curses_which=plaincurses
-            AS_IF([test "x$CURSES_LIB" = x], [
-                CURSES_LIB="-lcurses"
-            ])
-            AC_DEFINE([HAVE_CURSES], [1], [Define to 1 if a SysV or X/Open compatible Curses library is present])
-
-            # Check for base conformance (and header file)
-
-            AC_CACHE_CHECK([for working curses.h], [ax_cv_header_curses_h], [
-                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-                        @%:@include <curses.h>
-                    ]], [[
-                        chtype a = A_BOLD;
-                        int b = KEY_LEFT;
-                        initscr();
-                    ]])],
-                    [ax_cv_header_curses_h=yes],
-                    [ax_cv_header_curses_h=no])
-            ])
-            AS_IF([test "x$ax_cv_header_curses_h" = xyes], [
-                AC_DEFINE([HAVE_CURSES_H], [1], [Define to 1 if <curses.h> is present])
-
-                # Check for X/Open Enhanced conformance
-
-                AC_CACHE_CHECK([for X/Open Enhanced Curses conformance], [ax_cv_plaincurses_enhanced], [
-                    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-                            @%:@define _XOPEN_SOURCE_EXTENDED 1
-                            @%:@include <curses.h>
-                            @%:@ifndef _XOPEN_CURSES
-                            @%:@error "this Curses library is not enhanced"
-                            "this Curses library is not enhanced"
-                            @%:@endif
-                        ]], [[
-                            chtype a = A_BOLD;
-                            int b = KEY_LEFT;
-                            chtype c = COLOR_PAIR(1) & A_COLOR;
-                            attr_t d = WA_NORMAL;
-                            cchar_t e;
-                            wint_t f;
-                            initscr();
-                            init_pair(1, COLOR_WHITE, COLOR_RED);
-                            wattr_set(stdscr, d, 0, NULL);
-                            wget_wch(stdscr, &f);
-                        ]])],
-                        [ax_cv_plaincurses_enhanced=yes],
-                        [ax_cv_plaincurses_enhanced=no])
-                ])
-                AS_IF([test "x$ax_cv_plaincurses_enhanced" = xyes], [
-                    ax_cv_curses_enhanced=yes
-                    ax_cv_curses_color=yes
-                    AC_DEFINE([HAVE_CURSES_ENHANCED], [1], [Define to 1 if library supports X/Open Enhanced functions])
-                    AC_DEFINE([HAVE_CURSES_COLOR],    [1], [Define to 1 if library supports color (enhanced functions)])
-                ])
-
-                # Check for color functions
-
-                AC_CACHE_CHECK([for Curses color functions], [ax_cv_plaincurses_color], [
-                    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-                        @%:@define _XOPEN_SOURCE_EXTENDED 1
-                        @%:@include <curses.h>
-                        ]], [[
-                            chtype a = A_BOLD;
-                            int b = KEY_LEFT;
-                            chtype c = COLOR_PAIR(1) & A_COLOR;
-                            initscr();
-                            init_pair(1, COLOR_WHITE, COLOR_RED);
-                        ]])],
-                        [ax_cv_plaincurses_color=yes],
-                        [ax_cv_plaincurses_color=no])
-                ])
-                AS_IF([test "x$ax_cv_plaincurses_color" = xyes], [
-                    ax_cv_curses_color=yes
-                    AC_DEFINE([HAVE_CURSES_COLOR], [1], [Define to 1 if library supports color (enhanced functions)])
-                ])
-
-                # Check for obsolete functions
-
-                AC_CACHE_CHECK([for obsolete Curses functions], [ax_cv_plaincurses_obsolete], [
-                AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-                        @%:@include <curses.h>
-                    ]], [[
-                        chtype a = A_BOLD;
-                        int b = KEY_LEFT;
-                        int g = getattrs(stdscr);
-                        int h = getcurx(stdscr) + getmaxx(stdscr);
-                        initscr();
-                    ]])],
-                    [ax_cv_plaincurses_obsolete=yes],
-                    [ax_cv_plaincurses_obsolete=no])
-                ])
-                AS_IF([test "x$ax_cv_plaincurses_obsolete" = xyes], [
-                    ax_cv_curses_obsolete=yes
-                    AC_DEFINE([HAVE_CURSES_OBSOLETE], [1], [Define to 1 if library supports certain obsolete features])
-                ])
-            ])
-
-            AS_IF([test "x$ax_cv_header_curses_h" = xno], [
-                AC_MSG_WARN([could not find a working curses.h])
-            ])
-        ])
-    ])
-
-    AS_IF([test "x$ax_cv_curses"          != xyes], [ax_cv_curses=no])
-    AS_IF([test "x$ax_cv_curses_enhanced" != xyes], [ax_cv_curses_enhanced=no])
-    AS_IF([test "x$ax_cv_curses_color"    != xyes], [ax_cv_curses_color=no])
-    AS_IF([test "x$ax_cv_curses_obsolete" != xyes], [ax_cv_curses_obsolete=no])
-
-    LIBS=$ax_saved_LIBS
-])dnl
diff --git a/m4/errno_h.m4 b/m4/errno_h.m4
deleted file mode 100644
index 4ee9e6a1..00000000
--- a/m4/errno_h.m4
+++ /dev/null
@@ -1,137 +0,0 @@
-# errno_h.m4 serial 12
-dnl Copyright (C) 2004, 2006, 2008-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN_ONCE([gl_HEADER_ERRNO_H],
-[
-  AC_REQUIRE([AC_PROG_CC])
-  AC_CACHE_CHECK([for complete errno.h], [gl_cv_header_errno_h_complete], [
-    AC_EGREP_CPP([booboo],[
-#include <errno.h>
-#if !defined ETXTBSY
-booboo
-#endif
-#if !defined ENOMSG
-booboo
-#endif
-#if !defined EIDRM
-booboo
-#endif
-#if !defined ENOLINK
-booboo
-#endif
-#if !defined EPROTO
-booboo
-#endif
-#if !defined EMULTIHOP
-booboo
-#endif
-#if !defined EBADMSG
-booboo
-#endif
-#if !defined EOVERFLOW
-booboo
-#endif
-#if !defined ENOTSUP
-booboo
-#endif
-#if !defined ENETRESET
-booboo
-#endif
-#if !defined ECONNABORTED
-booboo
-#endif
-#if !defined ESTALE
-booboo
-#endif
-#if !defined EDQUOT
-booboo
-#endif
-#if !defined ECANCELED
-booboo
-#endif
-#if !defined EOWNERDEAD
-booboo
-#endif
-#if !defined ENOTRECOVERABLE
-booboo
-#endif
-#if !defined EILSEQ
-booboo
-#endif
-      ],
-      [gl_cv_header_errno_h_complete=no],
-      [gl_cv_header_errno_h_complete=yes])
-  ])
-  if test $gl_cv_header_errno_h_complete = yes; then
-    ERRNO_H=''
-  else
-    gl_NEXT_HEADERS([errno.h])
-    ERRNO_H='errno.h'
-  fi
-  AC_SUBST([ERRNO_H])
-  AM_CONDITIONAL([GL_GENERATE_ERRNO_H], [test -n "$ERRNO_H"])
-  gl_REPLACE_ERRNO_VALUE([EMULTIHOP])
-  gl_REPLACE_ERRNO_VALUE([ENOLINK])
-  gl_REPLACE_ERRNO_VALUE([EOVERFLOW])
-])
-
-# Assuming $1 = EOVERFLOW.
-# The EOVERFLOW errno value ought to be defined in <errno.h>, according to
-# POSIX.  But some systems (like OpenBSD 4.0 or AIX 3) don't define it, and
-# some systems (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined.
-# Check for the value of EOVERFLOW.
-# Set the variables EOVERFLOW_HIDDEN and EOVERFLOW_VALUE.
-AC_DEFUN([gl_REPLACE_ERRNO_VALUE],
-[
-  if test -n "$ERRNO_H"; then
-    AC_CACHE_CHECK([for ]$1[ value], [gl_cv_header_errno_h_]$1, [
-      AC_EGREP_CPP([yes],[
-#include <errno.h>
-#ifdef ]$1[
-yes
-#endif
-      ],
-      [gl_cv_header_errno_h_]$1[=yes],
-      [gl_cv_header_errno_h_]$1[=no])
-      if test $gl_cv_header_errno_h_]$1[ = no; then
-        AC_EGREP_CPP([yes],[
-#define _XOPEN_SOURCE_EXTENDED 1
-#include <errno.h>
-#ifdef ]$1[
-yes
-#endif
-          ], [gl_cv_header_errno_h_]$1[=hidden])
-        if test $gl_cv_header_errno_h_]$1[ = hidden; then
-          dnl The macro exists but is hidden.
-          dnl Define it to the same value.
-          AC_COMPUTE_INT([gl_cv_header_errno_h_]$1, $1, [
-#define _XOPEN_SOURCE_EXTENDED 1
-#include <errno.h>
-/* The following two lines are a workaround against an autoconf-2.52 bug.  */
-#include <stdio.h>
-#include <stdlib.h>
-])
-        fi
-      fi
-    ])
-    case $gl_cv_header_errno_h_]$1[ in
-      yes | no)
-        ]$1[_HIDDEN=0; ]$1[_VALUE=
-        ;;
-      *)
-        ]$1[_HIDDEN=1; ]$1[_VALUE="$gl_cv_header_errno_h_]$1["
-        ;;
-    esac
-    AC_SUBST($1[_HIDDEN])
-    AC_SUBST($1[_VALUE])
-  fi
-])
-
-dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
-dnl Remove this when we can assume autoconf >= 2.61.
-m4_ifdef([AC_COMPUTE_INT], [], [
-  AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
-])
diff --git a/m4/extensions.m4 b/m4/extensions.m4
deleted file mode 100644
index 37f55ca3..00000000
--- a/m4/extensions.m4
+++ /dev/null
@@ -1,138 +0,0 @@
-# serial 13  -*- Autoconf -*-
-# Enable extensions on systems that normally disable them.
-
-# Copyright (C) 2003, 2006-2014 Free Software Foundation, Inc.
-# This file is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from git
-# Autoconf.  Perhaps we can remove this once we can assume Autoconf
-# 2.70 or later everywhere, but since Autoconf mutates rapidly
-# enough in this area it's likely we'll need to redefine
-# AC_USE_SYSTEM_EXTENSIONS for quite some time.
-
-# If autoconf reports a warning
-#     warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS
-# or  warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS
-# the fix is
-#   1) to ensure that AC_USE_SYSTEM_EXTENSIONS is never directly invoked
-#      but always AC_REQUIREd,
-#   2) to ensure that for each occurrence of
-#        AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-#      or
-#        AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
-#      the corresponding gnulib module description has 'extensions' among
-#      its dependencies. This will ensure that the gl_USE_SYSTEM_EXTENSIONS
-#      invocation occurs in gl_EARLY, not in gl_INIT.
-
-# AC_USE_SYSTEM_EXTENSIONS
-# ------------------------
-# Enable extensions on systems that normally disable them,
-# typically due to standards-conformance issues.
-#
-# Remember that #undef in AH_VERBATIM gets replaced with #define by
-# AC_DEFINE.  The goal here is to define all known feature-enabling
-# macros, then, if reports of conflicts are made, disable macros that
-# cause problems on some platforms (such as __EXTENSIONS__).
-AC_DEFUN_ONCE([AC_USE_SYSTEM_EXTENSIONS],
-[AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
-AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
-
-  AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=])
-  if test "$MINIX" = yes; then
-    AC_DEFINE([_POSIX_SOURCE], [1],
-      [Define to 1 if you need to in order for 'stat' and other
-       things to work.])
-    AC_DEFINE([_POSIX_1_SOURCE], [2],
-      [Define to 2 if the system does not provide POSIX.1 features
-       except with this defined.])
-    AC_DEFINE([_MINIX], [1],
-      [Define to 1 if on MINIX.])
-    AC_DEFINE([_NETBSD_SOURCE], [1],
-      [Define to 1 to make NetBSD features available.  MINIX 3 needs this.])
-  fi
-
-dnl Use a different key than __EXTENSIONS__, as that name broke existing
-dnl configure.ac when using autoheader 2.62.
-  AH_VERBATIM([USE_SYSTEM_EXTENSIONS],
-[/* Enable extensions on AIX 3, Interix.  */
-#ifndef _ALL_SOURCE
-# undef _ALL_SOURCE
-#endif
-/* Enable general extensions on OS X.  */
-#ifndef _DARWIN_C_SOURCE
-# undef _DARWIN_C_SOURCE
-#endif
-/* Enable GNU extensions on systems that have them.  */
-#ifndef _GNU_SOURCE
-# undef _GNU_SOURCE
-#endif
-/* Enable threading extensions on Solaris.  */
-#ifndef _POSIX_PTHREAD_SEMANTICS
-# undef _POSIX_PTHREAD_SEMANTICS
-#endif
-/* Enable extensions on HP NonStop.  */
-#ifndef _TANDEM_SOURCE
-# undef _TANDEM_SOURCE
-#endif
-/* Enable X/Open extensions if necessary.  HP-UX 11.11 defines
-   mbstate_t only if _XOPEN_SOURCE is defined to 500, regardless of
-   whether compiling with -Ae or -D_HPUX_SOURCE=1.  */
-#ifndef _XOPEN_SOURCE
-# undef _XOPEN_SOURCE
-#endif
-/* Enable general extensions on Solaris.  */
-#ifndef __EXTENSIONS__
-# undef __EXTENSIONS__
-#endif
-])
-  AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__],
-    [ac_cv_safe_to_define___extensions__],
-    [AC_COMPILE_IFELSE(
-       [AC_LANG_PROGRAM([[
-#         define __EXTENSIONS__ 1
-          ]AC_INCLUDES_DEFAULT])],
-       [ac_cv_safe_to_define___extensions__=yes],
-       [ac_cv_safe_to_define___extensions__=no])])
-  test $ac_cv_safe_to_define___extensions__ = yes &&
-    AC_DEFINE([__EXTENSIONS__])
-  AC_DEFINE([_ALL_SOURCE])
-  AC_DEFINE([_DARWIN_C_SOURCE])
-  AC_DEFINE([_GNU_SOURCE])
-  AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
-  AC_DEFINE([_TANDEM_SOURCE])
-  AC_CACHE_CHECK([whether _XOPEN_SOURCE should be defined],
-    [ac_cv_should_define__xopen_source],
-    [ac_cv_should_define__xopen_source=no
-     AC_COMPILE_IFELSE(
-       [AC_LANG_PROGRAM([[
-          #include <wchar.h>
-          mbstate_t x;]])],
-       [],
-       [AC_COMPILE_IFELSE(
-          [AC_LANG_PROGRAM([[
-             #define _XOPEN_SOURCE 500
-             #include <wchar.h>
-             mbstate_t x;]])],
-          [ac_cv_should_define__xopen_source=yes])])])
-  test $ac_cv_should_define__xopen_source = yes &&
-    AC_DEFINE([_XOPEN_SOURCE], [500])
-])# AC_USE_SYSTEM_EXTENSIONS
-
-# gl_USE_SYSTEM_EXTENSIONS
-# ------------------------
-# Enable extensions on systems that normally disable them,
-# typically due to standards-conformance issues.
-AC_DEFUN_ONCE([gl_USE_SYSTEM_EXTENSIONS],
-[
-  dnl Require this macro before AC_USE_SYSTEM_EXTENSIONS.
-  dnl gnulib does not need it. But if it gets required by third-party macros
-  dnl after AC_USE_SYSTEM_EXTENSIONS is required, autoconf 2.62..2.63 emit a
-  dnl warning: "AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS".
-  dnl Note: We can do this only for one of the macros AC_AIX, AC_GNU_SOURCE,
-  dnl AC_MINIX. If people still use AC_AIX or AC_MINIX, they are out of luck.
-  AC_REQUIRE([AC_GNU_SOURCE])
-
-  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-])
diff --git a/m4/extern-inline.m4 b/m4/extern-inline.m4
deleted file mode 100644
index 7f1bb397..00000000
--- a/m4/extern-inline.m4
+++ /dev/null
@@ -1,99 +0,0 @@
-dnl 'extern inline' a la ISO C99.
-
-dnl Copyright 2012-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_EXTERN_INLINE],
-[
-  AH_VERBATIM([extern_inline],
-[/* Please see the Gnulib manual for how to use these macros.
-
-   Suppress extern inline with HP-UX cc, as it appears to be broken; see
-   <http://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>.
-
-   Suppress extern inline with Sun C in standards-conformance mode, as it
-   mishandles inline functions that call each other.  E.g., for 'inline void f
-   (void) { } inline void g (void) { f (); }', c99 incorrectly complains
-   'reference to static identifier "f" in extern inline function'.
-   This bug was observed with Sun C 5.12 SunOS_i386 2011/11/16.
-
-   Suppress extern inline (with or without __attribute__ ((__gnu_inline__)))
-   on configurations that mistakenly use 'static inline' to implement
-   functions or macros in standard C headers like <ctype.h>.  For example,
-   if isdigit is mistakenly implemented via a static inline function,
-   a program containing an extern inline function that calls isdigit
-   may not work since the C standard prohibits extern inline functions
-   from calling static functions.  This bug is known to occur on:
-
-     OS X 10.8 and earlier; see:
-     http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html
-
-     DragonFly; see
-     http://muscles.dragonflybsd.org/bulk/bleeding-edge-potential/latest-per-pkg/ah-tty-0.3.12.log
-
-     FreeBSD; see:
-     http://lists.gnu.org/archive/html/bug-gnulib/2014-07/msg00104.html
-
-   OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and
-   for clang but remains for g++; see <http://trac.macports.org/ticket/41033>.
-   Assume DragonFly and FreeBSD will be similar.  */
-#if (((defined __APPLE__ && defined __MACH__) \
-      || defined __DragonFly__ || defined __FreeBSD__) \
-     && (defined __header_inline \
-         ? (defined __cplusplus && defined __GNUC_STDC_INLINE__ \
-            && ! defined __clang__) \
-         : ((! defined _DONT_USE_CTYPE_INLINE_ \
-             && (defined __GNUC__ || defined __cplusplus)) \
-            || (defined _FORTIFY_SOURCE && 0 < _FORTIFY_SOURCE \
-                && defined __GNUC__ && ! defined __cplusplus))))
-# define _GL_EXTERN_INLINE_STDHEADER_BUG
-#endif
-#if ((__GNUC__ \
-      ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \
-      : (199901L <= __STDC_VERSION__ \
-         && !defined __HP_cc \
-         && !(defined __SUNPRO_C && __STDC__))) \
-     && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
-# define _GL_INLINE inline
-# define _GL_EXTERN_INLINE extern inline
-# define _GL_EXTERN_INLINE_IN_USE
-#elif (2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __STRICT_ANSI__ \
-       && !defined _GL_EXTERN_INLINE_STDHEADER_BUG)
-# if defined __GNUC_GNU_INLINE__ && __GNUC_GNU_INLINE__
-   /* __gnu_inline__ suppresses a GCC 4.2 diagnostic.  */
-#  define _GL_INLINE extern inline __attribute__ ((__gnu_inline__))
-# else
-#  define _GL_INLINE extern inline
-# endif
-# define _GL_EXTERN_INLINE extern
-# define _GL_EXTERN_INLINE_IN_USE
-#else
-# define _GL_INLINE static _GL_UNUSED
-# define _GL_EXTERN_INLINE static _GL_UNUSED
-#endif
-
-#if 4 < __GNUC__ + (6 <= __GNUC_MINOR__)
-# if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__
-#  define _GL_INLINE_HEADER_CONST_PRAGMA
-# else
-#  define _GL_INLINE_HEADER_CONST_PRAGMA \
-     _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
-# endif
-  /* Suppress GCC's bogus "no previous prototype for 'FOO'"
-     and "no previous declaration for 'FOO'"  diagnostics,
-     when FOO is an inline function in the header; see
-     <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>.  */
-# define _GL_INLINE_HEADER_BEGIN \
-    _Pragma ("GCC diagnostic push") \
-    _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
-    _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \
-    _GL_INLINE_HEADER_CONST_PRAGMA
-# define _GL_INLINE_HEADER_END \
-    _Pragma ("GCC diagnostic pop")
-#else
-# define _GL_INLINE_HEADER_BEGIN
-# define _GL_INLINE_HEADER_END
-#endif])
-])
diff --git a/m4/fcntl-o.m4 b/m4/fcntl-o.m4
deleted file mode 100644
index 43c93124..00000000
--- a/m4/fcntl-o.m4
+++ /dev/null
@@ -1,134 +0,0 @@
-# fcntl-o.m4 serial 4
-dnl Copyright (C) 2006, 2009-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl Written by Paul Eggert.
-
-# Test whether the flags O_NOATIME and O_NOFOLLOW actually work.
-# Define HAVE_WORKING_O_NOATIME to 1 if O_NOATIME works, or to 0 otherwise.
-# Define HAVE_WORKING_O_NOFOLLOW to 1 if O_NOFOLLOW works, or to 0 otherwise.
-AC_DEFUN([gl_FCNTL_O_FLAGS],
-[
-  dnl Persuade glibc <fcntl.h> to define O_NOATIME and O_NOFOLLOW.
-  dnl AC_USE_SYSTEM_EXTENSIONS was introduced in autoconf 2.60 and obsoletes
-  dnl AC_GNU_SOURCE.
-  m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
-    [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])],
-    [AC_REQUIRE([AC_GNU_SOURCE])])
-
-  AC_CHECK_HEADERS_ONCE([unistd.h])
-  AC_CHECK_FUNCS_ONCE([symlink])
-  AC_CACHE_CHECK([for working fcntl.h], [gl_cv_header_working_fcntl_h],
-    [AC_RUN_IFELSE(
-       [AC_LANG_PROGRAM(
-          [[#include <sys/types.h>
-           #include <sys/stat.h>
-           #if HAVE_UNISTD_H
-           # include <unistd.h>
-           #else /* on Windows with MSVC */
-           # include <io.h>
-           # include <stdlib.h>
-           # defined sleep(n) _sleep ((n) * 1000)
-           #endif
-           #include <fcntl.h>
-           #ifndef O_NOATIME
-            #define O_NOATIME 0
-           #endif
-           #ifndef O_NOFOLLOW
-            #define O_NOFOLLOW 0
-           #endif
-           static int const constants[] =
-            {
-              O_CREAT, O_EXCL, O_NOCTTY, O_TRUNC, O_APPEND,
-              O_NONBLOCK, O_SYNC, O_ACCMODE, O_RDONLY, O_RDWR, O_WRONLY
-            };
-          ]],
-          [[
-            int result = !constants;
-            #if HAVE_SYMLINK
-            {
-              static char const sym[] = "conftest.sym";
-              if (symlink ("/dev/null", sym) != 0)
-                result |= 2;
-              else
-                {
-                  int fd = open (sym, O_WRONLY | O_NOFOLLOW | O_CREAT, 0);
-                  if (fd >= 0)
-                    {
-                      close (fd);
-                      result |= 4;
-                    }
-                }
-              if (unlink (sym) != 0 || symlink (".", sym) != 0)
-                result |= 2;
-              else
-                {
-                  int fd = open (sym, O_RDONLY | O_NOFOLLOW);
-                  if (fd >= 0)
-                    {
-                      close (fd);
-                      result |= 4;
-                    }
-                }
-              unlink (sym);
-            }
-            #endif
-            {
-              static char const file[] = "confdefs.h";
-              int fd = open (file, O_RDONLY | O_NOATIME);
-              if (fd < 0)
-                result |= 8;
-              else
-                {
-                  struct stat st0;
-                  if (fstat (fd, &st0) != 0)
-                    result |= 16;
-                  else
-                    {
-                      char c;
-                      sleep (1);
-                      if (read (fd, &c, 1) != 1)
-                        result |= 24;
-                      else
-                        {
-                          if (close (fd) != 0)
-                            result |= 32;
-                          else
-                            {
-                              struct stat st1;
-                              if (stat (file, &st1) != 0)
-                                result |= 40;
-                              else
-                                if (st0.st_atime != st1.st_atime)
-                                  result |= 64;
-                            }
-                        }
-                    }
-                }
-            }
-            return result;]])],
-       [gl_cv_header_working_fcntl_h=yes],
-       [case $? in #(
-        4) gl_cv_header_working_fcntl_h='no (bad O_NOFOLLOW)';; #(
-        64) gl_cv_header_working_fcntl_h='no (bad O_NOATIME)';; #(
-        68) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #(
-         *) gl_cv_header_working_fcntl_h='no';;
-        esac],
-       [gl_cv_header_working_fcntl_h=cross-compiling])])
-
-  case $gl_cv_header_working_fcntl_h in #(
-  *O_NOATIME* | no | cross-compiling) ac_val=0;; #(
-  *) ac_val=1;;
-  esac
-  AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOATIME], [$ac_val],
-    [Define to 1 if O_NOATIME works.])
-
-  case $gl_cv_header_working_fcntl_h in #(
-  *O_NOFOLLOW* | no | cross-compiling) ac_val=0;; #(
-  *) ac_val=1;;
-  esac
-  AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOFOLLOW], [$ac_val],
-    [Define to 1 if O_NOFOLLOW works.])
-])
diff --git a/m4/fcntl_h.m4 b/m4/fcntl_h.m4
deleted file mode 100644
index fb2556d3..00000000
--- a/m4/fcntl_h.m4
+++ /dev/null
@@ -1,50 +0,0 @@
-# serial 15
-# Configure fcntl.h.
-dnl Copyright (C) 2006-2007, 2009-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl Written by Paul Eggert.
-
-AC_DEFUN([gl_FCNTL_H],
-[
-  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
-  AC_REQUIRE([gl_FCNTL_O_FLAGS])
-  gl_NEXT_HEADERS([fcntl.h])
-
-  dnl Ensure the type pid_t gets defined.
-  AC_REQUIRE([AC_TYPE_PID_T])
-
-  dnl Ensure the type mode_t gets defined.
-  AC_REQUIRE([AC_TYPE_MODE_T])
-
-  dnl Check for declarations of anything we want to poison if the
-  dnl corresponding gnulib module is not in use, if it is not common
-  dnl enough to be declared everywhere.
-  gl_WARN_ON_USE_PREPARE([[#include <fcntl.h>
-    ]], [fcntl openat])
-])
-
-AC_DEFUN([gl_FCNTL_MODULE_INDICATOR],
-[
-  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
-  AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
-  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
-  dnl Define it also as a C macro, for the benefit of the unit tests.
-  gl_MODULE_INDICATOR_FOR_TESTS([$1])
-])
-
-AC_DEFUN([gl_FCNTL_H_DEFAULTS],
-[
-  GNULIB_FCNTL=0;        AC_SUBST([GNULIB_FCNTL])
-  GNULIB_NONBLOCKING=0;  AC_SUBST([GNULIB_NONBLOCKING])
-  GNULIB_OPEN=0;         AC_SUBST([GNULIB_OPEN])
-  GNULIB_OPENAT=0;       AC_SUBST([GNULIB_OPENAT])
-  dnl Assume proper GNU behavior unless another module says otherwise.
-  HAVE_FCNTL=1;          AC_SUBST([HAVE_FCNTL])
-  HAVE_OPENAT=1;         AC_SUBST([HAVE_OPENAT])
-  REPLACE_FCNTL=0;       AC_SUBST([REPLACE_FCNTL])
-  REPLACE_OPEN=0;        AC_SUBST([REPLACE_OPEN])
-  REPLACE_OPENAT=0;      AC_SUBST([REPLACE_OPENAT])
-])
diff --git a/m4/gnulib-cache.m4 b/m4/gnulib-cache.m4
deleted file mode 100644
index d4eafa67..00000000
--- a/m4/gnulib-cache.m4
+++ /dev/null
@@ -1,50 +0,0 @@
-# Copyright (C) 2002-2014 Free Software Foundation, Inc.
-#
-# This file is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3 of the License, or
-# (at your option) any later version.
-#
-# This file is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this file.  If not, see <http://www.gnu.org/licenses/>.
-#
-# As a special exception to the GNU General Public License,
-# this file may be distributed as part of a program that
-# contains a configuration script generated by Autoconf, under
-# the same distribution terms as the rest of that program.
-#
-# Generated by gnulib-tool.
-#
-# This file represents the specification of how gnulib-tool is used.
-# It acts as a cache: It is written and read by gnulib-tool.
-# In projects that use version control, this file is meant to be put under
-# version control, like the configure.ac and various Makefile.am files.
-
-
-# Specification in the form of a command-line invocation:
-#   gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --no-conditional-dependencies --libtool --macro-prefix=gl forkpty lib-ignore strndup
-
-# Specification in the form of a few gnulib-tool.m4 macro invocations:
-gl_LOCAL_DIR([])
-gl_MODULES([
-  forkpty
-  lib-ignore
-  strndup
-])
-gl_AVOID([])
-gl_SOURCE_BASE([lib])
-gl_M4_BASE([m4])
-gl_PO_BASE([])
-gl_DOC_BASE([doc])
-gl_TESTS_BASE([tests])
-gl_LIB([libgnu])
-gl_MAKEFILE_NAME([])
-gl_LIBTOOL
-gl_MACRO_PREFIX([gl])
-gl_PO_DOMAIN([])
-gl_WITNESS_C_MACRO([])
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
deleted file mode 100644
index 35f61952..00000000
--- a/m4/gnulib-common.m4
+++ /dev/null
@@ -1,447 +0,0 @@
-# gnulib-common.m4 serial 35
-dnl Copyright (C) 2007-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-# gl_COMMON
-# is expanded unconditionally through gnulib-tool magic.
-AC_DEFUN([gl_COMMON], [
-  dnl Use AC_REQUIRE here, so that the code is expanded once only.
-  AC_REQUIRE([gl_00GNULIB])
-  AC_REQUIRE([gl_COMMON_BODY])
-])
-AC_DEFUN([gl_COMMON_BODY], [
-  AH_VERBATIM([_Noreturn],
-[/* The _Noreturn keyword of C11.  */
-#if ! (defined _Noreturn \
-       || (defined __STDC_VERSION__ && 201112 <= __STDC_VERSION__))
-# if (3 <= __GNUC__ || (__GNUC__ == 2 && 8 <= __GNUC_MINOR__) \
-      || 0x5110 <= __SUNPRO_C)
-#  define _Noreturn __attribute__ ((__noreturn__))
-# elif defined _MSC_VER && 1200 <= _MSC_VER
-#  define _Noreturn __declspec (noreturn)
-# else
-#  define _Noreturn
-# endif
-#endif
-])
-  AH_VERBATIM([isoc99_inline],
-[/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
-   the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
-   earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
-   __APPLE__ && __MACH__ test for Mac OS X.
-   __APPLE_CC__ tests for the Apple compiler and its version.
-   __STDC_VERSION__ tests for the C99 mode.  */
-#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
-# define __GNUC_STDC_INLINE__ 1
-#endif])
-  AH_VERBATIM([unused_parameter],
-[/* Define as a marker that can be attached to declarations that might not
-    be used.  This helps to reduce warnings, such as from
-    GCC -Wunused-parameter.  */
-#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
-# define _GL_UNUSED __attribute__ ((__unused__))
-#else
-# define _GL_UNUSED
-#endif
-/* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name
-   is a misnomer outside of parameter lists.  */
-#define _UNUSED_PARAMETER_ _GL_UNUSED
-
-/* gcc supports the "unused" attribute on possibly unused labels, and
-   g++ has since version 4.5.  Note to support C++ as well as C,
-   _GL_UNUSED_LABEL should be used with a trailing ;  */
-#if !defined __cplusplus || __GNUC__ > 4 \
-    || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
-# define _GL_UNUSED_LABEL _GL_UNUSED
-#else
-# define _GL_UNUSED_LABEL
-#endif
-
-/* The __pure__ attribute was added in gcc 2.96.  */
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
-# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
-#else
-# define _GL_ATTRIBUTE_PURE /* empty */
-#endif
-
-/* The __const__ attribute was added in gcc 2.95.  */
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
-# define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
-#else
-# define _GL_ATTRIBUTE_CONST /* empty */
-#endif
-])
-  dnl Preparation for running test programs:
-  dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not
-  dnl to /dev/tty, so they can be redirected to log files.  Such diagnostics
-  dnl arise e.g., in the macros gl_PRINTF_DIRECTIVE_N, gl_SNPRINTF_DIRECTIVE_N.
-  LIBC_FATAL_STDERR_=1
-  export LIBC_FATAL_STDERR_
-])
-
-# gl_MODULE_INDICATOR_CONDITION
-# expands to a C preprocessor expression that evaluates to 1 or 0, depending
-# whether a gnulib module that has been requested shall be considered present
-# or not.
-m4_define([gl_MODULE_INDICATOR_CONDITION], [1])
-
-# gl_MODULE_INDICATOR_SET_VARIABLE([modulename])
-# sets the shell variable that indicates the presence of the given module to
-# a C preprocessor expression that will evaluate to 1.
-AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE],
-[
-  gl_MODULE_INDICATOR_SET_VARIABLE_AUX(
-    [GNULIB_[]m4_translit([[$1]],
-                          [abcdefghijklmnopqrstuvwxyz./-],
-                          [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])],
-    [gl_MODULE_INDICATOR_CONDITION])
-])
-
-# gl_MODULE_INDICATOR_SET_VARIABLE_AUX([variable])
-# modifies the shell variable to include the gl_MODULE_INDICATOR_CONDITION.
-# The shell variable's value is a C preprocessor expression that evaluates
-# to 0 or 1.
-AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX],
-[
-  m4_if(m4_defn([gl_MODULE_INDICATOR_CONDITION]), [1],
-    [
-     dnl Simplify the expression VALUE || 1 to 1.
-     $1=1
-    ],
-    [gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([$1],
-                                             [gl_MODULE_INDICATOR_CONDITION])])
-])
-
-# gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([variable], [condition])
-# modifies the shell variable to include the given condition.  The shell
-# variable's value is a C preprocessor expression that evaluates to 0 or 1.
-AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR],
-[
-  dnl Simplify the expression 1 || CONDITION to 1.
-  if test "$[]$1" != 1; then
-    dnl Simplify the expression 0 || CONDITION to CONDITION.
-    if test "$[]$1" = 0; then
-      $1=$2
-    else
-      $1="($[]$1 || $2)"
-    fi
-  fi
-])
-
-# gl_MODULE_INDICATOR([modulename])
-# defines a C macro indicating the presence of the given module
-# in a location where it can be used.
-#                                             |  Value  |   Value   |
-#                                             | in lib/ | in tests/ |
-# --------------------------------------------+---------+-----------+
-# Module present among main modules:          |    1    |     1     |
-# --------------------------------------------+---------+-----------+
-# Module present among tests-related modules: |    0    |     1     |
-# --------------------------------------------+---------+-----------+
-# Module not present at all:                  |    0    |     0     |
-# --------------------------------------------+---------+-----------+
-AC_DEFUN([gl_MODULE_INDICATOR],
-[
-  AC_DEFINE_UNQUOTED([GNULIB_]m4_translit([[$1]],
-      [abcdefghijklmnopqrstuvwxyz./-],
-      [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]),
-    [gl_MODULE_INDICATOR_CONDITION],
-    [Define to a C preprocessor expression that evaluates to 1 or 0,
-     depending whether the gnulib module $1 shall be considered present.])
-])
-
-# gl_MODULE_INDICATOR_FOR_TESTS([modulename])
-# defines a C macro indicating the presence of the given module
-# in lib or tests. This is useful to determine whether the module
-# should be tested.
-#                                             |  Value  |   Value   |
-#                                             | in lib/ | in tests/ |
-# --------------------------------------------+---------+-----------+
-# Module present among main modules:          |    1    |     1     |
-# --------------------------------------------+---------+-----------+
-# Module present among tests-related modules: |    1    |     1     |
-# --------------------------------------------+---------+-----------+
-# Module not present at all:                  |    0    |     0     |
-# --------------------------------------------+---------+-----------+
-AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS],
-[
-  AC_DEFINE([GNULIB_TEST_]m4_translit([[$1]],
-      [abcdefghijklmnopqrstuvwxyz./-],
-      [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
-    [Define to 1 when the gnulib module $1 should be tested.])
-])
-
-# gl_ASSERT_NO_GNULIB_POSIXCHECK
-# asserts that there will never be a need to #define GNULIB_POSIXCHECK.
-# and thereby enables an optimization of configure and config.h.
-# Used by Emacs.
-AC_DEFUN([gl_ASSERT_NO_GNULIB_POSIXCHECK],
-[
-  dnl Override gl_WARN_ON_USE_PREPARE.
-  dnl But hide this definition from 'aclocal'.
-  AC_DEFUN([gl_W][ARN_ON_USE_PREPARE], [])
-])
-
-# gl_ASSERT_NO_GNULIB_TESTS
-# asserts that there will be no gnulib tests in the scope of the configure.ac
-# and thereby enables an optimization of config.h.
-# Used by Emacs.
-AC_DEFUN([gl_ASSERT_NO_GNULIB_TESTS],
-[
-  dnl Override gl_MODULE_INDICATOR_FOR_TESTS.
-  AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], [])
-])
-
-# Test whether <features.h> exists.
-# Set HAVE_FEATURES_H.
-AC_DEFUN([gl_FEATURES_H],
-[
-  AC_CHECK_HEADERS_ONCE([features.h])
-  if test $ac_cv_header_features_h = yes; then
-    HAVE_FEATURES_H=1
-  else
-    HAVE_FEATURES_H=0
-  fi
-  AC_SUBST([HAVE_FEATURES_H])
-])
-
-# m4_foreach_w
-# is a backport of autoconf-2.59c's m4_foreach_w.
-# Remove this macro when we can assume autoconf >= 2.60.
-m4_ifndef([m4_foreach_w],
-  [m4_define([m4_foreach_w],
-    [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])])
-
-# AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH])
-# ----------------------------------------------------
-# Backport of autoconf-2.63b's macro.
-# Remove this macro when we can assume autoconf >= 2.64.
-m4_ifndef([AS_VAR_IF],
-[m4_define([AS_VAR_IF],
-[AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
-
-# gl_PROG_CC_C99
-# Modifies the value of the shell variable CC in an attempt to make $CC
-# understand ISO C99 source code.
-# This is like AC_PROG_CC_C99, except that
-# - AC_PROG_CC_C99 did not exist in Autoconf versions < 2.60,
-# - AC_PROG_CC_C99 does not mix well with AC_PROG_CC_STDC
-#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00367.html>,
-#   but many more packages use AC_PROG_CC_STDC than AC_PROG_CC_C99
-#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00441.html>.
-# Remaining problems:
-# - When AC_PROG_CC_STDC is invoked twice, it adds the C99 enabling options
-#   to CC twice
-#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00431.html>.
-# - AC_PROG_CC_STDC is likely to change now that C11 is an ISO standard.
-AC_DEFUN([gl_PROG_CC_C99],
-[
-  dnl Change that version number to the minimum Autoconf version that supports
-  dnl mixing AC_PROG_CC_C99 calls with AC_PROG_CC_STDC calls.
-  m4_version_prereq([9.0],
-    [AC_REQUIRE([AC_PROG_CC_C99])],
-    [AC_REQUIRE([AC_PROG_CC_STDC])])
-])
-
-# gl_PROG_AR_RANLIB
-# Determines the values for AR, ARFLAGS, RANLIB that fit with the compiler.
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-AC_DEFUN([gl_PROG_AR_RANLIB],
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-  dnl as "cc", and GCC as "gcc". They have different object file formats and
-  dnl library formats. In particular, the GNU binutils programs ar, ranlib
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-#endif
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-    fi
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-    if test -z "$ARFLAGS"; then
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-  AC_SUBST([AR])
-  AC_SUBST([ARFLAGS])
-  if test -z "$RANLIB"; then
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-      RANLIB=':'
-    else
-      dnl Use the ranlib program if it is available.
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diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
deleted file mode 100644
index ddbf6574..00000000
--- a/m4/gnulib-comp.m4
+++ /dev/null
@@ -1,357 +0,0 @@
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-#
-# This file is free software; you can redistribute it and/or modify
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-# the Free Software Foundation; either version 3 of the License, or
-# (at your option) any later version.
-#
-# This file is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this file.  If not, see <http://www.gnu.org/licenses/>.
-#
-# As a special exception to the GNU General Public License,
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-  lib/openpty.c
-  lib/posix_openpt.c
-  lib/pty.in.h
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-  m4/fcntl-o.m4
-  m4/fcntl_h.m4
-  m4/gnulib-common.m4
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-  m4/onceonly.m4
-  m4/posix_openpt.m4
-  m4/pty.m4
-  m4/pty_h.m4
-  m4/socklen.m4
-  m4/sockpfaf.m4
-  m4/ssize_t.m4
-  m4/stdalign.m4
-  m4/stddef_h.m4
-  m4/stdlib_h.m4
-  m4/string_h.m4
-  m4/strndup.m4
-  m4/strnlen.m4
-  m4/sys_ioctl_h.m4
-  m4/sys_socket_h.m4
-  m4/sys_types_h.m4
-  m4/sys_uio_h.m4
-  m4/unistd_h.m4
-  m4/warn-on-use.m4
-  m4/wchar_t.m4
-])
diff --git a/m4/gnulib-tool.m4 b/m4/gnulib-tool.m4
deleted file mode 100644
index a588e151..00000000
--- a/m4/gnulib-tool.m4
+++ /dev/null
@@ -1,57 +0,0 @@
-# gnulib-tool.m4 serial 2
-dnl Copyright (C) 2004-2005, 2009-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl The following macros need not be invoked explicitly.
-dnl Invoking them does nothing except to declare default arguments
-dnl for "gnulib-tool --import".
-
-dnl Usage: gl_LOCAL_DIR([DIR])
-AC_DEFUN([gl_LOCAL_DIR], [])
-
-dnl Usage: gl_MODULES([module1 module2 ...])
-AC_DEFUN([gl_MODULES], [])
-
-dnl Usage: gl_AVOID([module1 module2 ...])
-AC_DEFUN([gl_AVOID], [])
-
-dnl Usage: gl_SOURCE_BASE([DIR])
-AC_DEFUN([gl_SOURCE_BASE], [])
-
-dnl Usage: gl_M4_BASE([DIR])
-AC_DEFUN([gl_M4_BASE], [])
-
-dnl Usage: gl_PO_BASE([DIR])
-AC_DEFUN([gl_PO_BASE], [])
-
-dnl Usage: gl_DOC_BASE([DIR])
-AC_DEFUN([gl_DOC_BASE], [])
-
-dnl Usage: gl_TESTS_BASE([DIR])
-AC_DEFUN([gl_TESTS_BASE], [])
-
-dnl Usage: gl_WITH_TESTS
-AC_DEFUN([gl_WITH_TESTS], [])
-
-dnl Usage: gl_LIB([LIBNAME])
-AC_DEFUN([gl_LIB], [])
-
-dnl Usage: gl_LGPL or gl_LGPL([VERSION])
-AC_DEFUN([gl_LGPL], [])
-
-dnl Usage: gl_MAKEFILE_NAME([FILENAME])
-AC_DEFUN([gl_MAKEFILE_NAME], [])
-
-dnl Usage: gl_LIBTOOL
-AC_DEFUN([gl_LIBTOOL], [])
-
-dnl Usage: gl_MACRO_PREFIX([PREFIX])
-AC_DEFUN([gl_MACRO_PREFIX], [])
-
-dnl Usage: gl_PO_DOMAIN([DOMAIN])
-AC_DEFUN([gl_PO_DOMAIN], [])
-
-dnl Usage: gl_VC_FILES([BOOLEAN])
-AC_DEFUN([gl_VC_FILES], [])
diff --git a/m4/include_next.m4 b/m4/include_next.m4
deleted file mode 100644
index 69ad3dbb..00000000
--- a/m4/include_next.m4
+++ /dev/null
@@ -1,223 +0,0 @@
-# include_next.m4 serial 23
-dnl Copyright (C) 2006-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl From Paul Eggert and Derek Price.
-
-dnl Sets INCLUDE_NEXT and PRAGMA_SYSTEM_HEADER.
-dnl
-dnl INCLUDE_NEXT expands to 'include_next' if the compiler supports it, or to
-dnl 'include' otherwise.
-dnl
-dnl INCLUDE_NEXT_AS_FIRST_DIRECTIVE expands to 'include_next' if the compiler
-dnl supports it in the special case that it is the first include directive in
-dnl the given file, or to 'include' otherwise.
-dnl
-dnl PRAGMA_SYSTEM_HEADER can be used in files that contain #include_next,
-dnl so as to avoid GCC warnings when the gcc option -pedantic is used.
-dnl '#pragma GCC system_header' has the same effect as if the file was found
-dnl through the include search path specified with '-isystem' options (as
-dnl opposed to the search path specified with '-I' options). Namely, gcc
-dnl does not warn about some things, and on some systems (Solaris and Interix)
-dnl __STDC__ evaluates to 0 instead of to 1. The latter is an undesired side
-dnl effect; we are therefore careful to use 'defined __STDC__' or '1' instead
-dnl of plain '__STDC__'.
-dnl
-dnl PRAGMA_COLUMNS can be used in files that override system header files, so
-dnl as to avoid compilation errors on HP NonStop systems when the gnulib file
-dnl is included by a system header file that does a "#pragma COLUMNS 80" (which
-dnl has the effect of truncating the lines of that file and all files that it
-dnl includes to 80 columns) and the gnulib file has lines longer than 80
-dnl columns.
-
-AC_DEFUN([gl_INCLUDE_NEXT],
-[
-  AC_LANG_PREPROC_REQUIRE()
-  AC_CACHE_CHECK([whether the preprocessor supports include_next],
-    [gl_cv_have_include_next],
-    [rm -rf conftestd1a conftestd1b conftestd2
-     mkdir conftestd1a conftestd1b conftestd2
-     dnl IBM C 9.0, 10.1 (original versions, prior to the 2009-01 updates) on
-     dnl AIX 6.1 support include_next when used as first preprocessor directive
-     dnl in a file, but not when preceded by another include directive. Check
-     dnl for this bug by including <stdio.h>.
-     dnl Additionally, with this same compiler, include_next is a no-op when
-     dnl used in a header file that was included by specifying its absolute
-     dnl file name. Despite these two bugs, include_next is used in the
-     dnl compiler's <math.h>. By virtue of the second bug, we need to use
-     dnl include_next as well in this case.
-     cat <<EOF > conftestd1a/conftest.h
-#define DEFINED_IN_CONFTESTD1
-#include_next <conftest.h>
-#ifdef DEFINED_IN_CONFTESTD2
-int foo;
-#else
-#error "include_next doesn't work"
-#endif
-EOF
-     cat <<EOF > conftestd1b/conftest.h
-#define DEFINED_IN_CONFTESTD1
-#include <stdio.h>
-#include_next <conftest.h>
-#ifdef DEFINED_IN_CONFTESTD2
-int foo;
-#else
-#error "include_next doesn't work"
-#endif
-EOF
-     cat <<EOF > conftestd2/conftest.h
-#ifndef DEFINED_IN_CONFTESTD1
-#error "include_next test doesn't work"
-#endif
-#define DEFINED_IN_CONFTESTD2
-EOF
-     gl_save_CPPFLAGS="$CPPFLAGS"
-     CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1b -Iconftestd2"
-dnl We intentionally avoid using AC_LANG_SOURCE here.
-     AC_COMPILE_IFELSE([AC_LANG_DEFINES_PROVIDED[#include <conftest.h>]],
-       [gl_cv_have_include_next=yes],
-       [CPPFLAGS="$gl_save_CPPFLAGS -Iconftestd1a -Iconftestd2"
-        AC_COMPILE_IFELSE([AC_LANG_DEFINES_PROVIDED[#include <conftest.h>]],
-          [gl_cv_have_include_next=buggy],
-          [gl_cv_have_include_next=no])
-       ])
-     CPPFLAGS="$gl_save_CPPFLAGS"
-     rm -rf conftestd1a conftestd1b conftestd2
-    ])
-  PRAGMA_SYSTEM_HEADER=
-  if test $gl_cv_have_include_next = yes; then
-    INCLUDE_NEXT=include_next
-    INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
-    if test -n "$GCC"; then
-      PRAGMA_SYSTEM_HEADER='#pragma GCC system_header'
-    fi
-  else
-    if test $gl_cv_have_include_next = buggy; then
-      INCLUDE_NEXT=include
-      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include_next
-    else
-      INCLUDE_NEXT=include
-      INCLUDE_NEXT_AS_FIRST_DIRECTIVE=include
-    fi
-  fi
-  AC_SUBST([INCLUDE_NEXT])
-  AC_SUBST([INCLUDE_NEXT_AS_FIRST_DIRECTIVE])
-  AC_SUBST([PRAGMA_SYSTEM_HEADER])
-  AC_CACHE_CHECK([whether system header files limit the line length],
-    [gl_cv_pragma_columns],
-    [dnl HP NonStop systems, which define __TANDEM, have this misfeature.
-     AC_EGREP_CPP([choke me],
-       [
-#ifdef __TANDEM
-choke me
-#endif
-       ],
-       [gl_cv_pragma_columns=yes],
-       [gl_cv_pragma_columns=no])
-    ])
-  if test $gl_cv_pragma_columns = yes; then
-    PRAGMA_COLUMNS="#pragma COLUMNS 10000"
-  else
-    PRAGMA_COLUMNS=
-  fi
-  AC_SUBST([PRAGMA_COLUMNS])
-])
-
-# gl_CHECK_NEXT_HEADERS(HEADER1 HEADER2 ...)
-# ------------------------------------------
-# For each arg foo.h, if #include_next works, define NEXT_FOO_H to be
-# '<foo.h>'; otherwise define it to be
-# '"///usr/include/foo.h"', or whatever other absolute file name is suitable.
-# Also, if #include_next works as first preprocessing directive in a file,
-# define NEXT_AS_FIRST_DIRECTIVE_FOO_H to be '<foo.h>'; otherwise define it to
-# be
-# '"///usr/include/foo.h"', or whatever other absolute file name is suitable.
-# That way, a header file with the following line:
-#       #@INCLUDE_NEXT@ @NEXT_FOO_H@
-# or
-#       #@INCLUDE_NEXT_AS_FIRST_DIRECTIVE@ @NEXT_AS_FIRST_DIRECTIVE_FOO_H@
-# behaves (after sed substitution) as if it contained
-#       #include_next <foo.h>
-# even if the compiler does not support include_next.
-# The three "///" are to pacify Sun C 5.8, which otherwise would say
-# "warning: #include of /usr/include/... may be non-portable".
-# Use '""', not '<>', so that the /// cannot be confused with a C99 comment.
-# Note: This macro assumes that the header file is not empty after
-# preprocessing, i.e. it does not only define preprocessor macros but also
-# provides some type/enum definitions or function/variable declarations.
-#
-# This macro also checks whether each header exists, by invoking
-# AC_CHECK_HEADERS_ONCE or AC_CHECK_HEADERS on each argument.
-AC_DEFUN([gl_CHECK_NEXT_HEADERS],
-[
-  gl_NEXT_HEADERS_INTERNAL([$1], [check])
-])
-
-# gl_NEXT_HEADERS(HEADER1 HEADER2 ...)
-# ------------------------------------
-# Like gl_CHECK_NEXT_HEADERS, except do not check whether the headers exist.
-# This is suitable for headers like <stddef.h> that are standardized by C89
-# and therefore can be assumed to exist.
-AC_DEFUN([gl_NEXT_HEADERS],
-[
-  gl_NEXT_HEADERS_INTERNAL([$1], [assume])
-])
-
-# The guts of gl_CHECK_NEXT_HEADERS and gl_NEXT_HEADERS.
-AC_DEFUN([gl_NEXT_HEADERS_INTERNAL],
-[
-  AC_REQUIRE([gl_INCLUDE_NEXT])
-  AC_REQUIRE([AC_CANONICAL_HOST])
-
-  m4_if([$2], [check],
-    [AC_CHECK_HEADERS_ONCE([$1])
-    ])
-
-dnl FIXME: gl_next_header and gl_header_exists must be used unquoted
-dnl until we can assume autoconf 2.64 or newer.
-  m4_foreach_w([gl_HEADER_NAME], [$1],
-    [AS_VAR_PUSHDEF([gl_next_header],
-                    [gl_cv_next_]m4_defn([gl_HEADER_NAME]))
-     if test $gl_cv_have_include_next = yes; then
-       AS_VAR_SET(gl_next_header, ['<'gl_HEADER_NAME'>'])
-     else
-       AC_CACHE_CHECK(
-         [absolute name of <]m4_defn([gl_HEADER_NAME])[>],
-         m4_defn([gl_next_header]),
-         [m4_if([$2], [check],
-            [AS_VAR_PUSHDEF([gl_header_exists],
-                            [ac_cv_header_]m4_defn([gl_HEADER_NAME]))
-             if test AS_VAR_GET(gl_header_exists) = yes; then
-             AS_VAR_POPDEF([gl_header_exists])
-            ])
-           gl_ABSOLUTE_HEADER_ONE(gl_HEADER_NAME)
-           AS_VAR_COPY([gl_header], [gl_cv_absolute_]AS_TR_SH(gl_HEADER_NAME))
-           AS_VAR_SET(gl_next_header, ['"'$gl_header'"'])
-          m4_if([$2], [check],
-            [else
-               AS_VAR_SET(gl_next_header, ['<'gl_HEADER_NAME'>'])
-             fi
-            ])
-         ])
-     fi
-     AC_SUBST(
-       AS_TR_CPP([NEXT_]m4_defn([gl_HEADER_NAME])),
-       [AS_VAR_GET(gl_next_header)])
-     if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then
-       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next'
-       gl_next_as_first_directive='<'gl_HEADER_NAME'>'
-     else
-       # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include'
-       gl_next_as_first_directive=AS_VAR_GET(gl_next_header)
-     fi
-     AC_SUBST(
-       AS_TR_CPP([NEXT_AS_FIRST_DIRECTIVE_]m4_defn([gl_HEADER_NAME])),
-       [$gl_next_as_first_directive])
-     AS_VAR_POPDEF([gl_next_header])])
-])
-
-# Autoconf 2.68 added warnings for our use of AC_COMPILE_IFELSE;
-# this fallback is safe for all earlier autoconf versions.
-m4_define_default([AC_LANG_DEFINES_PROVIDED])
diff --git a/m4/ioctl.m4 b/m4/ioctl.m4
deleted file mode 100644
index 5a31a396..00000000
--- a/m4/ioctl.m4
+++ /dev/null
@@ -1,41 +0,0 @@
-# ioctl.m4 serial 4
-dnl Copyright (C) 2008-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_FUNC_IOCTL],
-[
-  AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
-  AC_REQUIRE([gl_HEADER_SYS_SOCKET])
-  HAVE_IOCTL=1
-  if test "$ac_cv_header_winsock2_h" = yes; then
-    dnl Even if the 'socket' module is not used here, another part of the
-    dnl application may use it and pass file descriptors that refer to
-    dnl sockets to the ioctl() function. So enable the support for sockets.
-    HAVE_IOCTL=0
-  else
-    AC_CHECK_FUNCS([ioctl])
-    dnl On glibc systems, the second parameter is 'unsigned long int request',
-    dnl not 'int request'. We cannot simply cast the function pointer, but
-    dnl instead need a wrapper.
-    AC_CACHE_CHECK([for ioctl with POSIX signature],
-      [gl_cv_func_ioctl_posix_signature],
-      [AC_COMPILE_IFELSE(
-         [AC_LANG_PROGRAM(
-            [[#include <sys/ioctl.h>]],
-            [[extern
-              #ifdef __cplusplus
-              "C"
-              #endif
-              int ioctl (int, int, ...);
-            ]])
-         ],
-         [gl_cv_func_ioctl_posix_signature=yes],
-         [gl_cv_func_ioctl_posix_signature=no])
-      ])
-    if test $gl_cv_func_ioctl_posix_signature != yes; then
-      REPLACE_IOCTL=1
-    fi
-  fi
-])
diff --git a/m4/lib-ignore.m4 b/m4/lib-ignore.m4
deleted file mode 100644
index 7baa5283..00000000
--- a/m4/lib-ignore.m4
+++ /dev/null
@@ -1,115 +0,0 @@
-# If possible, ignore libraries that are not depended on.
-
-dnl Copyright (C) 2006, 2009-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl Written by Paul Eggert.
-
-# gl_IGNORE_UNUSED_LIBRARIES
-# --------------------------
-# Determines the option to be passed to the C/C++/Fortran compiler, so that it
-# omits unused libraries.
-# Example (on Solaris):
-# $ cc foo.c -lnsl; ldd ./a.out
-#         libnsl.so.1 =>   /lib/libnsl.so.1
-#         libc.so.1 =>     /lib/libc.so.1
-#         libmp.so.2 =>    /lib/libmp.so.2
-#         libmd.so.1 =>    /lib/libmd.so.1
-#         libscf.so.1 =>   /lib/libscf.so.1
-#         libdoor.so.1 =>  /lib/libdoor.so.1
-#         libuutil.so.1 =>         /lib/libuutil.so.1
-#         libgen.so.1 =>   /lib/libgen.so.1
-#         libm.so.2 =>     /lib/libm.so.2
-# $ cc foo.c -lnsl -Wl,-z,ignore; ldd ./a.out
-#         libc.so.1 =>     /lib/libc.so.1
-#         libm.so.2 =>     /lib/libm.so.2
-#
-# Note that the option works only for the C compiler, not for the C++
-# compiler:
-# - Sun C likes '-Wl,-z,ignore'.
-#   '-Qoption ld -z,ignore' is not accepted.
-#   '-z ignore' is accepted but has no effect.
-# - Sun C++ and Sun Fortran like '-Qoption ld -z,ignore'.
-#   '-Wl,-z,ignore' is not accepted.
-#   '-z ignore' is accepted but has no effect.
-#
-# Sets and substitutes a variable that depends on the current language:
-# - IGNORE_UNUSED_LIBRARIES_CFLAGS    for C
-# - IGNORE_UNUSED_LIBRARIES_CXXFLAGS  for C++
-# - IGNORE_UNUSED_LIBRARIES_FFLAGS    for Fortran
-#
-# Note that the option works only for direct invocation of the compiler, not
-# through libtool: When libtool is used to create a shared library, it will
-# honor and translate '-Wl,-z,ignore' to '-Qoption ld -z -Qoption ld ignore'
-# if needed, but it will drop a '-Qoption ld -z,ignore' on the command line.
-#
-AC_DEFUN([gl_IGNORE_UNUSED_LIBRARIES],
-[
-  AC_CACHE_CHECK([for []_AC_LANG[] compiler flag to ignore unused libraries],
-    [gl_cv_prog_[]_AC_LANG_ABBREV[]_ignore_unused_libraries],
-    [gl_cv_prog_[]_AC_LANG_ABBREV[]_ignore_unused_libraries=none
-     gl_saved_ldflags=$LDFLAGS
-     gl_saved_libs=$LIBS
-     # Link with -lm to detect binutils 2.16 bug with --as-needed; see
-     # <http://lists.gnu.org/archive/html/bug-gnulib/2006-06/msg00131.html>.
-     LIBS="$LIBS -lm"
-     # Use long option sequences like '-z ignore' to test for the feature,
-     # to forestall problems with linkers that have -z, -i, -g, -n, etc. flags.
-     # GCC + binutils likes '-Wl,--as-needed'.
-     # GCC + Solaris ld likes '-Wl,-z,ignore'.
-     # Sun C likes '-Wl,-z,ignore'. '-z ignore' is accepted but has no effect.
-     # Don't try bare '--as-needed'; nothing likes it and the HP-UX 11.11
-     # native cc issues annoying warnings and then ignores it,
-     # which would cause us to incorrectly conclude that it worked.
-     for gl_flags in _gl_IGNORE_UNUSED_LIBRARIES_OPTIONS
-     do
-       LDFLAGS="$gl_flags $LDFLAGS"
-       AC_LINK_IFELSE([AC_LANG_PROGRAM()],
-         [gl_cv_prog_[]_AC_LANG_ABBREV[]_ignore_unused_libraries=$gl_flags])
-       LDFLAGS=$gl_saved_ldflags
-       test "$gl_cv_prog_[]_AC_LANG_ABBREV[]_ignore_unused_libraries" != none &&
-         break
-     done
-     LIBS=$gl_saved_libs
-    ])
-  IGNORE_UNUSED_LIBRARIES_[]_AC_LANG_PREFIX[]FLAGS=
-  if test "$gl_cv_prog_[]_AC_LANG_ABBREV[]_ignore_unused_libraries" != none; then
-    IGNORE_UNUSED_LIBRARIES_[]_AC_LANG_PREFIX[]FLAGS="$gl_cv_prog_[]_AC_LANG_ABBREV[]_ignore_unused_libraries"
-  fi
-  AC_SUBST([IGNORE_UNUSED_LIBRARIES_]_AC_LANG_PREFIX[FLAGS])
-])
-
-# _gl_IGNORE_UNUSED_LIBRARIES_OPTIONS
-# -----------------------------------
-# Expands to the language dependent options to be tried.
-AC_DEFUN([_gl_IGNORE_UNUSED_LIBRARIES_OPTIONS],
-[_AC_LANG_DISPATCH([$0], _AC_LANG, $@)])
-
-# _gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(C)
-# --------------------------------------
-m4_define([_gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(C)],
-[ '-Wl,--as-needed' \
-  '-Wl,-z,ignore' \
-  '-z ignore'
-])
-
-# _gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(C++)
-# ----------------------------------------
-m4_define([_gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(C++)],
-[ '-Wl,--as-needed' \
-  '-Qoption ld -z,ignore' \
-  '-Wl,-z,ignore' \
-  '-z ignore'
-])
-
-# _gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(Fortran 77)
-# -----------------------------------------------
-m4_copy([_gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(C++)],
-        [_gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(Fortran 77)])
-
-# _gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(Fortran)
-# --------------------------------------------
-m4_copy([_gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(Fortran 77)],
-        [_gl_IGNORE_UNUSED_LIBRARIES_OPTIONS(Fortran)])
diff --git a/m4/msvc-inval.m4 b/m4/msvc-inval.m4
deleted file mode 100644
index 7f26087e..00000000
--- a/m4/msvc-inval.m4
+++ /dev/null
@@ -1,19 +0,0 @@
-# msvc-inval.m4 serial 1
-dnl Copyright (C) 2011-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_MSVC_INVAL],
-[
-  AC_CHECK_FUNCS_ONCE([_set_invalid_parameter_handler])
-  if test $ac_cv_func__set_invalid_parameter_handler = yes; then
-    HAVE_MSVC_INVALID_PARAMETER_HANDLER=1
-    AC_DEFINE([HAVE_MSVC_INVALID_PARAMETER_HANDLER], [1],
-      [Define to 1 on MSVC platforms that have the "invalid parameter handler"
-       concept.])
-  else
-    HAVE_MSVC_INVALID_PARAMETER_HANDLER=0
-  fi
-  AC_SUBST([HAVE_MSVC_INVALID_PARAMETER_HANDLER])
-])
diff --git a/m4/msvc-nothrow.m4 b/m4/msvc-nothrow.m4
deleted file mode 100644
index 9e32c171..00000000
--- a/m4/msvc-nothrow.m4
+++ /dev/null
@@ -1,10 +0,0 @@
-# msvc-nothrow.m4 serial 1
-dnl Copyright (C) 2011-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_MSVC_NOTHROW],
-[
-  AC_REQUIRE([gl_MSVC_INVAL])
-])
diff --git a/m4/off_t.m4 b/m4/off_t.m4
deleted file mode 100644
index f5885b34..00000000
--- a/m4/off_t.m4
+++ /dev/null
@@ -1,18 +0,0 @@
-# off_t.m4 serial 1
-dnl Copyright (C) 2012-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl Check whether to override the 'off_t' type.
-dnl Set WINDOWS_64_BIT_OFF_T.
-
-AC_DEFUN([gl_TYPE_OFF_T],
-[
-  m4_ifdef([gl_LARGEFILE], [
-    AC_REQUIRE([gl_LARGEFILE])
-  ], [
-    WINDOWS_64_BIT_OFF_T=0
-  ])
-  AC_SUBST([WINDOWS_64_BIT_OFF_T])
-])
diff --git a/m4/onceonly.m4 b/m4/onceonly.m4
deleted file mode 100644
index 15f94cef..00000000
--- a/m4/onceonly.m4
+++ /dev/null
@@ -1,104 +0,0 @@
-# onceonly.m4 serial 9
-dnl Copyright (C) 2002-2003, 2005-2006, 2008-2014 Free Software Foundation,
-dnl Inc.
-dnl
-dnl This file is free software; you can redistribute it and/or modify
-dnl it under the terms of the GNU General Public License as published by
-dnl the Free Software Foundation; either version 3 of the License, or
-dnl (at your option) any later version.
-dnl
-dnl This file is distributed in the hope that it will be useful,
-dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
-dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-dnl GNU General Public License for more details.
-dnl
-dnl You should have received a copy of the GNU General Public License
-dnl along with this file.  If not, see <http://www.gnu.org/licenses/>.
-dnl
-dnl As a special exception to the GNU General Public License,
-dnl this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
-
-dnl This file defines some "once only" variants of standard autoconf macros.
-dnl   AC_CHECK_HEADERS_ONCE          like  AC_CHECK_HEADERS
-dnl   AC_CHECK_FUNCS_ONCE            like  AC_CHECK_FUNCS
-dnl   AC_CHECK_DECLS_ONCE            like  AC_CHECK_DECLS
-dnl   AC_REQUIRE([AC_FUNC_STRCOLL])  like  AC_FUNC_STRCOLL
-dnl The advantage is that the check for each of the headers/functions/decls
-dnl will be put only once into the 'configure' file. It keeps the size of
-dnl the 'configure' file down, and avoids redundant output when 'configure'
-dnl is run.
-dnl The drawback is that the checks cannot be conditionalized. If you write
-dnl   if some_condition; then gl_CHECK_HEADERS(stdlib.h); fi
-dnl inside an AC_DEFUNed function, the gl_CHECK_HEADERS macro call expands to
-dnl empty, and the check will be inserted before the body of the AC_DEFUNed
-dnl function.
-
-dnl The original code implemented AC_CHECK_HEADERS_ONCE and AC_CHECK_FUNCS_ONCE
-dnl in terms of AC_DEFUN and AC_REQUIRE. This implementation uses diversions to
-dnl named sections DEFAULTS and INIT_PREPARE in order to check all requested
-dnl headers at once, thus reducing the size of 'configure'. It is known to work
-dnl with autoconf 2.57..2.62 at least . The size reduction is ca. 9%.
-
-dnl Autoconf version 2.59 plus gnulib is required; this file is not needed
-dnl with Autoconf 2.60 or greater. But note that autoconf's implementation of
-dnl AC_CHECK_DECLS_ONCE expects a comma-separated list of symbols as first
-dnl argument!
-AC_PREREQ([2.59])
-
-# AC_CHECK_HEADERS_ONCE(HEADER1 HEADER2 ...) is a once-only variant of
-# AC_CHECK_HEADERS(HEADER1 HEADER2 ...).
-AC_DEFUN([AC_CHECK_HEADERS_ONCE], [
-  :
-  m4_foreach_w([gl_HEADER_NAME], [$1], [
-    AC_DEFUN([gl_CHECK_HEADER_]m4_quote(m4_translit(gl_HEADER_NAME,
-                                                    [./-], [___])), [
-      m4_divert_text([INIT_PREPARE],
-        [gl_header_list="$gl_header_list gl_HEADER_NAME"])
-      gl_HEADERS_EXPANSION
-      AH_TEMPLATE(AS_TR_CPP([HAVE_]m4_defn([gl_HEADER_NAME])),
-        [Define to 1 if you have the <]m4_defn([gl_HEADER_NAME])[> header file.])
-    ])
-    AC_REQUIRE([gl_CHECK_HEADER_]m4_quote(m4_translit(gl_HEADER_NAME,
-                                                      [./-], [___])))
-  ])
-])
-m4_define([gl_HEADERS_EXPANSION], [
-  m4_divert_text([DEFAULTS], [gl_header_list=])
-  AC_CHECK_HEADERS([$gl_header_list])
-  m4_define([gl_HEADERS_EXPANSION], [])
-])
-
-# AC_CHECK_FUNCS_ONCE(FUNC1 FUNC2 ...) is a once-only variant of
-# AC_CHECK_FUNCS(FUNC1 FUNC2 ...).
-AC_DEFUN([AC_CHECK_FUNCS_ONCE], [
-  :
-  m4_foreach_w([gl_FUNC_NAME], [$1], [
-    AC_DEFUN([gl_CHECK_FUNC_]m4_defn([gl_FUNC_NAME]), [
-      m4_divert_text([INIT_PREPARE],
-        [gl_func_list="$gl_func_list gl_FUNC_NAME"])
-      gl_FUNCS_EXPANSION
-      AH_TEMPLATE(AS_TR_CPP([HAVE_]m4_defn([gl_FUNC_NAME])),
-        [Define to 1 if you have the ']m4_defn([gl_FUNC_NAME])[' function.])
-    ])
-    AC_REQUIRE([gl_CHECK_FUNC_]m4_defn([gl_FUNC_NAME]))
-  ])
-])
-m4_define([gl_FUNCS_EXPANSION], [
-  m4_divert_text([DEFAULTS], [gl_func_list=])
-  AC_CHECK_FUNCS([$gl_func_list])
-  m4_define([gl_FUNCS_EXPANSION], [])
-])
-
-# AC_CHECK_DECLS_ONCE(DECL1 DECL2 ...) is a once-only variant of
-# AC_CHECK_DECLS(DECL1, DECL2, ...).
-AC_DEFUN([AC_CHECK_DECLS_ONCE], [
-  :
-  m4_foreach_w([gl_DECL_NAME], [$1], [
-    AC_DEFUN([gl_CHECK_DECL_]m4_defn([gl_DECL_NAME]), [
-      AC_CHECK_DECLS(m4_defn([gl_DECL_NAME]))
-    ])
-    AC_REQUIRE([gl_CHECK_DECL_]m4_defn([gl_DECL_NAME]))
-  ])
-])
diff --git a/m4/posix_openpt.m4 b/m4/posix_openpt.m4
deleted file mode 100644
index 252a074d..00000000
--- a/m4/posix_openpt.m4
+++ /dev/null
@@ -1,19 +0,0 @@
-# posix_openpt.m4 serial 2
-dnl Copyright (C) 2011-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_FUNC_POSIX_OPENPT],
-[
-  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
-
-  dnl Persuade Solaris <stdlib.h> to declare posix_openpt().
-  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-
-  AC_CHECK_FUNCS_ONCE([posix_openpt])
-  if test $ac_cv_func_posix_openpt != yes; then
-    dnl The system does not have posix_openpt.
-    HAVE_POSIX_OPENPT=0
-  fi
-])
diff --git a/m4/pty.m4 b/m4/pty.m4
deleted file mode 100644
index c68cca75..00000000
--- a/m4/pty.m4
+++ /dev/null
@@ -1,148 +0,0 @@
-# pty.m4 serial 13
-dnl Copyright (C) 2010-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-# gl_PTY_LIB
-# ----------
-# Define automake variable PTY_LIB to the library needed (if any).
-AC_DEFUN([gl_PTY_LIB],
-[
-  # Check for the library required for forkpty.
-  PTY_LIB=
-  save_LIBS="$LIBS"
-  AC_SEARCH_LIBS([forkpty], [util],
-    [if test "$ac_cv_search_forkpty" != "none required"; then
-       PTY_LIB="$ac_cv_search_forkpty"
-     fi])
-  LIBS="$save_LIBS"
-  AC_SUBST([PTY_LIB])
-])
-
-AC_DEFUN([gl_FUNC_FORKPTY],
-[
-  AC_REQUIRE([gl_PTY_LIB])
-  AC_REQUIRE([gl_PTY_H])
-
-  dnl We assume that forkpty exists (possibly in libc, possibly in libutil)
-  dnl if and only if it is declared.
-  AC_CHECK_DECLS([forkpty],,, [[
-/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0.  */
-#include <sys/types.h>
-#if HAVE_PTY_H
-# include <pty.h>
-#endif
-#if HAVE_UTIL_H
-# include <util.h>
-#endif
-#if HAVE_LIBUTIL_H
-# include <libutil.h>
-#endif
-]])
-  if test $ac_cv_have_decl_forkpty = yes; then
-    dnl The system has forkpty.
-    dnl Prefer glibc's const-safe prototype, if available.
-    AC_CACHE_CHECK([for const-safe forkpty signature],
-      [gl_cv_func_forkpty_const],
-      [AC_COMPILE_IFELSE(
-        [AC_LANG_PROGRAM([[
-/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0.  */
-#include <sys/types.h>
-#if HAVE_PTY_H
-# include <pty.h>
-#endif
-#if HAVE_UTIL_H
-# include <util.h>
-#endif
-#if HAVE_LIBUTIL_H
-# include <libutil.h>
-#endif
-          ]], [[
-            int forkpty (int *, char *, struct termios const *,
-                         struct winsize const *);
-          ]])
-        ],
-        [gl_cv_func_forkpty_const=yes], [gl_cv_func_forkpty_const=no])
-      ])
-    if test $gl_cv_func_forkpty_const != yes; then
-      REPLACE_FORKPTY=1
-    fi
-  else
-    dnl The system does not have forkpty.
-    HAVE_FORKPTY=0
-  fi
-  AC_DEFINE_UNQUOTED([HAVE_FORKPTY], [$HAVE_FORKPTY],
-    [Define to 1 if the system has the 'forkpty' function.])
-])
-
-AC_DEFUN([gl_FUNC_OPENPTY],
-[
-  AC_REQUIRE([gl_PTY_LIB])
-  AC_REQUIRE([gl_PTY_H])
-
-  dnl Persuade Solaris <stdlib.h> to declare posix_openpt().
-  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-
-  dnl We assume that openpty exists (possibly in libc, possibly in libutil)
-  dnl if and only if it is declared.
-  AC_CHECK_DECLS([openpty],,, [[
-/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0.  */
-#include <sys/types.h>
-#if HAVE_PTY_H
-# include <pty.h>
-#endif
-#if HAVE_UTIL_H
-# include <util.h>
-#endif
-#if HAVE_LIBUTIL_H
-# include <libutil.h>
-#endif
-]])
-  if test $ac_cv_have_decl_openpty = yes; then
-    AC_DEFINE([HAVE_OPENPTY], [1],
-      [Define to 1 if the system has the 'openpty' function.])
-    dnl The system has openpty.
-    dnl Prefer glibc's const-safe prototype, if available.
-    AC_CACHE_CHECK([for const-safe openpty signature],
-      [gl_cv_func_openpty_const],
-      [AC_COMPILE_IFELSE(
-        [AC_LANG_PROGRAM([[
-/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0.  */
-#include <sys/types.h>
-#if HAVE_PTY_H
-# include <pty.h>
-#endif
-#if HAVE_UTIL_H
-# include <util.h>
-#endif
-#if HAVE_LIBUTIL_H
-# include <libutil.h>
-#endif
-          ]], [[
-            int openpty (int *, int *, char *, struct termios const *,
-                       struct winsize const *);
-          ]])
-        ],
-        [gl_cv_func_openpty_const=yes], [gl_cv_func_openpty_const=no])
-      ])
-    if test $gl_cv_func_openpty_const != yes; then
-      REPLACE_OPENPTY=1
-    fi
-  else
-    dnl The system does not have openpty.
-    HAVE_OPENPTY=0
-    dnl Prerequisites of lib/openpty.c in this case.
-    AC_CHECK_FUNCS([_getpty posix_openpt])
-  fi
-])
-
-AC_DEFUN([gl_FUNC_LOGIN_TTY],
-[
-  AC_REQUIRE([gl_PTY_LIB])
-
-  gl_saved_libs="$LIBS"
-  LIBS="$LIBS $PTY_LIB"
-  AC_CHECK_FUNCS([login_tty])
-  LIBS="$gl_saved_LIBS"
-])
diff --git a/m4/pty_h.m4 b/m4/pty_h.m4
deleted file mode 100644
index d3cc2e7e..00000000
--- a/m4/pty_h.m4
+++ /dev/null
@@ -1,69 +0,0 @@
-# pty_h.m4 serial 10
-dnl Copyright (C) 2009-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-# gl_PTY_H
-# --------
-# Set up the GNU-like <pty.h> replacement header.
-AC_DEFUN_ONCE([gl_PTY_H],
-[
-  AC_REQUIRE([gl_PTY_H_DEFAULTS])
-
-  # Make sure that pty.h provides forkpty, or setup the replacement.
-  AC_CHECK_HEADERS_ONCE([pty.h])
-  if test $ac_cv_header_pty_h != yes; then
-    HAVE_PTY_H=0
-    AC_CHECK_HEADERS([util.h libutil.h])
-    if test $ac_cv_header_util_h = yes; then
-      HAVE_UTIL_H=1
-    fi
-    if test $ac_cv_header_libutil_h = yes; then
-      HAVE_LIBUTIL_H=1
-    fi
-  else # Have <pty.h>, assume forkpty is declared there.
-    HAVE_PTY_H=1
-  fi
-  AC_SUBST([HAVE_PTY_H])
-  dnl <pty.h> is always overridden, because of GNULIB_POSIXCHECK.
-  gl_CHECK_NEXT_HEADERS([pty.h])
-
-  dnl Check for declarations of anything we want to poison if the
-  dnl corresponding gnulib module is not in use.
-  gl_WARN_ON_USE_PREPARE([[
-/* <sys/types.h> is a prerequisite of <libutil.h> on FreeBSD 8.0.  */
-#include <sys/types.h>
-#if HAVE_PTY_H
-# include <pty.h>
-#endif
-#if HAVE_UTIL_H
-# include <util.h>
-#endif
-#if HAVE_LIBUTIL_H
-# include <libutil.h>
-#endif
-    ]], [forkpty openpty])
-])
-
-AC_DEFUN([gl_PTY_MODULE_INDICATOR],
-[
-  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
-  AC_REQUIRE([gl_PTY_H_DEFAULTS])
-  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
-  dnl Define it also as a C macro, for the benefit of the unit tests.
-  gl_MODULE_INDICATOR_FOR_TESTS([$1])
-])
-
-AC_DEFUN([gl_PTY_H_DEFAULTS],
-[
-  GNULIB_FORKPTY=0;     AC_SUBST([GNULIB_FORKPTY])
-  GNULIB_OPENPTY=0;     AC_SUBST([GNULIB_OPENPTY])
-  dnl Assume proper GNU behavior unless another module says otherwise.
-  HAVE_UTIL_H=0;        AC_SUBST([HAVE_UTIL_H])
-  HAVE_LIBUTIL_H=0;     AC_SUBST([HAVE_LIBUTIL_H])
-  HAVE_FORKPTY=1;       AC_SUBST([HAVE_FORKPTY])
-  HAVE_OPENPTY=1;       AC_SUBST([HAVE_OPENPTY])
-  REPLACE_FORKPTY=0;    AC_SUBST([REPLACE_FORKPTY])
-  REPLACE_OPENPTY=0;    AC_SUBST([REPLACE_OPENPTY])
-])
diff --git a/m4/socklen.m4 b/m4/socklen.m4
deleted file mode 100644
index 4c07f864..00000000
--- a/m4/socklen.m4
+++ /dev/null
@@ -1,77 +0,0 @@
-# socklen.m4 serial 10
-dnl Copyright (C) 2005-2007, 2009-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl From Albert Chin, Windows fixes from Simon Josefsson.
-
-dnl Check for socklen_t: historically on BSD it is an int, and in
-dnl POSIX 1g it is a type of its own, but some platforms use different
-dnl types for the argument to getsockopt, getpeername, etc.:
-dnl HP-UX 10.20, IRIX 6.5, OSF/1 4.0, Interix 3.5, BeOS.
-dnl So we have to test to find something that will work.
-
-AC_DEFUN([gl_TYPE_SOCKLEN_T],
-  [AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])dnl
-   AC_CHECK_TYPE([socklen_t], ,
-     [AC_MSG_CHECKING([for socklen_t equivalent])
-      AC_CACHE_VAL([gl_cv_socklen_t_equiv],
-        [# Systems have either "struct sockaddr *" or
-         # "void *" as the second argument to getpeername
-         gl_cv_socklen_t_equiv=
-         for arg2 in "struct sockaddr" void; do
-           for t in int size_t "unsigned int" "long int" "unsigned long int"; do
-             AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-                 [[#include <sys/types.h>
-                   #include <sys/socket.h>
-
-                   int getpeername (int, $arg2 *, $t *);]],
-                 [[$t len;
-                  getpeername (0, 0, &len);]])],
-               [gl_cv_socklen_t_equiv="$t"])
-             test "$gl_cv_socklen_t_equiv" != "" && break
-           done
-           test "$gl_cv_socklen_t_equiv" != "" && break
-         done
-      ])
-      if test "$gl_cv_socklen_t_equiv" = ""; then
-        AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
-      fi
-      AC_MSG_RESULT([$gl_cv_socklen_t_equiv])
-      AC_DEFINE_UNQUOTED([socklen_t], [$gl_cv_socklen_t_equiv],
-        [type to use in place of socklen_t if not defined])],
-     [gl_SOCKET_HEADERS])])
-
-dnl On mingw32, socklen_t is in ws2tcpip.h ('int'), so we try to find
-dnl it there too.  But on Cygwin, wc2tcpip.h must not be included.  Users
-dnl of this module should use the same include pattern as gl_SOCKET_HEADERS.
-dnl When you change this macro, keep also in sync:
-dnl   - gl_CHECK_SOCKET_HEADERS,
-dnl   - the Include section of modules/socklen.
-AC_DEFUN([gl_SOCKET_HEADERS],
-[
-/* <sys/types.h> is not needed according to POSIX, but the
-   <sys/socket.h> in i386-unknown-freebsd4.10 and
-   powerpc-apple-darwin5.5 required it. */
-#include <sys/types.h>
-#if HAVE_SYS_SOCKET_H
-# include <sys/socket.h>
-#elif HAVE_WS2TCPIP_H
-# include <ws2tcpip.h>
-#endif
-])
-
-dnl Tests for the existence of the header for socket facilities.
-dnl Defines the C macros HAVE_SYS_SOCKET_H, HAVE_WS2TCPIP_H.
-dnl This macro must match gl_SOCKET_HEADERS.
-AC_DEFUN([gl_CHECK_SOCKET_HEADERS],
-  [AC_CHECK_HEADERS_ONCE([sys/socket.h])
-   if test $ac_cv_header_sys_socket_h = no; then
-     dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
-     dnl the check for those headers unconditional; yet cygwin reports
-     dnl that the headers are present but cannot be compiled (since on
-     dnl cygwin, all socket information should come from sys/socket.h).
-     AC_CHECK_HEADERS([ws2tcpip.h])
-   fi
-  ])
diff --git a/m4/sockpfaf.m4 b/m4/sockpfaf.m4
deleted file mode 100644
index 31d436f0..00000000
--- a/m4/sockpfaf.m4
+++ /dev/null
@@ -1,87 +0,0 @@
-# sockpfaf.m4 serial 8
-dnl Copyright (C) 2004, 2006, 2009-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl Test for some common socket protocol families (PF_INET, PF_INET6, ...)
-dnl and some common address families (AF_INET, AF_INET6, ...).
-dnl This test assumes that a system supports an address family if and only if
-dnl it supports the corresponding protocol family.
-
-dnl From Bruno Haible.
-
-AC_DEFUN([gl_SOCKET_FAMILIES],
-[
-  AC_REQUIRE([gl_HEADER_SYS_SOCKET])
-  AC_CHECK_HEADERS_ONCE([netinet/in.h])
-
-  AC_MSG_CHECKING([for IPv4 sockets])
-  AC_CACHE_VAL([gl_cv_socket_ipv4],
-    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-#ifdef HAVE_WINSOCK2_H
-#include <winsock2.h>
-#endif]],
-[[int x = AF_INET; struct in_addr y; struct sockaddr_in z;
- if (&x && &y && &z) return 0;]])],
-       gl_cv_socket_ipv4=yes, gl_cv_socket_ipv4=no)])
-  AC_MSG_RESULT([$gl_cv_socket_ipv4])
-  if test $gl_cv_socket_ipv4 = yes; then
-    AC_DEFINE([HAVE_IPV4], [1], [Define to 1 if <sys/socket.h> defines AF_INET.])
-  fi
-
-  AC_MSG_CHECKING([for IPv6 sockets])
-  AC_CACHE_VAL([gl_cv_socket_ipv6],
-    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_NETINET_IN_H
-#include <netinet/in.h>
-#endif
-#ifdef HAVE_WINSOCK2_H
-#include <winsock2.h>
-#endif
-#ifdef HAVE_WS2TCPIP_H
-#include <ws2tcpip.h>
-#endif]],
-[[int x = AF_INET6; struct in6_addr y; struct sockaddr_in6 z;
- if (&x && &y && &z) return 0;]])],
-       gl_cv_socket_ipv6=yes, gl_cv_socket_ipv6=no)])
-  AC_MSG_RESULT([$gl_cv_socket_ipv6])
-  if test $gl_cv_socket_ipv6 = yes; then
-    AC_DEFINE([HAVE_IPV6], [1], [Define to 1 if <sys/socket.h> defines AF_INET6.])
-  fi
-])
-
-AC_DEFUN([gl_SOCKET_FAMILY_UNIX],
-[
-  AC_REQUIRE([gl_HEADER_SYS_SOCKET])
-  AC_CHECK_HEADERS_ONCE([sys/un.h])
-
-  AC_MSG_CHECKING([for UNIX domain sockets])
-  AC_CACHE_VAL([gl_cv_socket_unix],
-    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_SYS_UN_H
-#include <sys/un.h>
-#endif
-#ifdef HAVE_WINSOCK2_H
-#include <winsock2.h>
-#endif]],
-[[int x = AF_UNIX; struct sockaddr_un y;
- if (&x && &y) return 0;]])],
-       gl_cv_socket_unix=yes, gl_cv_socket_unix=no)])
-  AC_MSG_RESULT([$gl_cv_socket_unix])
-  if test $gl_cv_socket_unix = yes; then
-    AC_DEFINE([HAVE_UNIXSOCKET], [1], [Define to 1 if <sys/socket.h> defines AF_UNIX.])
-  fi
-])
diff --git a/m4/ssize_t.m4 b/m4/ssize_t.m4
deleted file mode 100644
index fbe1d068..00000000
--- a/m4/ssize_t.m4
+++ /dev/null
@@ -1,23 +0,0 @@
-# ssize_t.m4 serial 5 (gettext-0.18.2)
-dnl Copyright (C) 2001-2003, 2006, 2010-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl From Bruno Haible.
-dnl Test whether ssize_t is defined.
-
-AC_DEFUN([gt_TYPE_SSIZE_T],
-[
-  AC_CACHE_CHECK([for ssize_t], [gt_cv_ssize_t],
-    [AC_COMPILE_IFELSE(
-       [AC_LANG_PROGRAM(
-          [[#include <sys/types.h>]],
-          [[int x = sizeof (ssize_t *) + sizeof (ssize_t);
-            return !x;]])],
-       [gt_cv_ssize_t=yes], [gt_cv_ssize_t=no])])
-  if test $gt_cv_ssize_t = no; then
-    AC_DEFINE([ssize_t], [int],
-              [Define as a signed type of the same size as size_t.])
-  fi
-])
diff --git a/m4/stdalign.m4 b/m4/stdalign.m4
deleted file mode 100644
index 9efafe5c..00000000
--- a/m4/stdalign.m4
+++ /dev/null
@@ -1,53 +0,0 @@
-# Check for stdalign.h that conforms to C11.
-
-dnl Copyright 2011-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-# Prepare for substituting <stdalign.h> if it is not supported.
-
-AC_DEFUN([gl_STDALIGN_H],
-[
-  AC_CACHE_CHECK([for working stdalign.h],
-    [gl_cv_header_working_stdalign_h],
-    [AC_COMPILE_IFELSE(
-       [AC_LANG_PROGRAM(
-          [[#include <stdalign.h>
-            #include <stddef.h>
-
-            /* Test that alignof yields a result consistent with offsetof.
-               This catches GCC bug 52023
-               <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>.  */
-            #ifdef __cplusplus
-               template <class t> struct alignof_helper { char a; t b; };
-            # define ao(type) offsetof (alignof_helper<type>, b)
-            #else
-            # define ao(type) offsetof (struct { char a; type b; }, b)
-            #endif
-            char test_double[ao (double) % _Alignof (double) == 0 ? 1 : -1];
-            char test_long[ao (long int) % _Alignof (long int) == 0 ? 1 : -1];
-            char test_alignof[alignof (double) == _Alignof (double) ? 1 : -1];
-
-            /* Test _Alignas only on platforms where gnulib can help.  */
-            #if \
-                ((defined __cplusplus && 201103 <= __cplusplus) \
-                 || __GNUC__ || __IBMC__ || __IBMCPP__ || __ICC \
-                 || 0x5110 <= __SUNPRO_C || 1300 <= _MSC_VER)
-              struct alignas_test { char c; char alignas (8) alignas_8; };
-              char test_alignas[offsetof (struct alignas_test, alignas_8) == 8
-                                ? 1 : -1];
-            #endif
-          ]])],
-       [gl_cv_header_working_stdalign_h=yes],
-       [gl_cv_header_working_stdalign_h=no])])
-
-  if test $gl_cv_header_working_stdalign_h = yes; then
-    STDALIGN_H=''
-  else
-    STDALIGN_H='stdalign.h'
-  fi
-
-  AC_SUBST([STDALIGN_H])
-  AM_CONDITIONAL([GL_GENERATE_STDALIGN_H], [test -n "$STDALIGN_H"])
-])
diff --git a/m4/stddef_h.m4 b/m4/stddef_h.m4
deleted file mode 100644
index c555e295..00000000
--- a/m4/stddef_h.m4
+++ /dev/null
@@ -1,47 +0,0 @@
-dnl A placeholder for POSIX 2008 <stddef.h>, for platforms that have issues.
-# stddef_h.m4 serial 4
-dnl Copyright (C) 2009-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_STDDEF_H],
-[
-  AC_REQUIRE([gl_STDDEF_H_DEFAULTS])
-  AC_REQUIRE([gt_TYPE_WCHAR_T])
-  STDDEF_H=
-  if test $gt_cv_c_wchar_t = no; then
-    HAVE_WCHAR_T=0
-    STDDEF_H=stddef.h
-  fi
-  AC_CACHE_CHECK([whether NULL can be used in arbitrary expressions],
-    [gl_cv_decl_null_works],
-    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stddef.h>
-      int test[2 * (sizeof NULL == sizeof (void *)) -1];
-]])],
-      [gl_cv_decl_null_works=yes],
-      [gl_cv_decl_null_works=no])])
-  if test $gl_cv_decl_null_works = no; then
-    REPLACE_NULL=1
-    STDDEF_H=stddef.h
-  fi
-  AC_SUBST([STDDEF_H])
-  AM_CONDITIONAL([GL_GENERATE_STDDEF_H], [test -n "$STDDEF_H"])
-  if test -n "$STDDEF_H"; then
-    gl_NEXT_HEADERS([stddef.h])
-  fi
-])
-
-AC_DEFUN([gl_STDDEF_MODULE_INDICATOR],
-[
-  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
-  AC_REQUIRE([gl_STDDEF_H_DEFAULTS])
-  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
-])
-
-AC_DEFUN([gl_STDDEF_H_DEFAULTS],
-[
-  dnl Assume proper GNU behavior unless another module says otherwise.
-  REPLACE_NULL=0;                AC_SUBST([REPLACE_NULL])
-  HAVE_WCHAR_T=1;                AC_SUBST([HAVE_WCHAR_T])
-])
diff --git a/m4/stdlib_h.m4 b/m4/stdlib_h.m4
deleted file mode 100644
index 03b448b9..00000000
--- a/m4/stdlib_h.m4
+++ /dev/null
@@ -1,117 +0,0 @@
-# stdlib_h.m4 serial 42
-dnl Copyright (C) 2007-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_STDLIB_H],
-[
-  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
-  gl_NEXT_HEADERS([stdlib.h])
-
-  dnl Check for declarations of anything we want to poison if the
-  dnl corresponding gnulib module is not in use, and which is not
-  dnl guaranteed by C89.
-  gl_WARN_ON_USE_PREPARE([[#include <stdlib.h>
-#if HAVE_SYS_LOADAVG_H
-# include <sys/loadavg.h>
-#endif
-#if HAVE_RANDOM_H
-# include <random.h>
-#endif
-    ]], [_Exit atoll canonicalize_file_name getloadavg getsubopt grantpt
-    initstate initstate_r mkdtemp mkostemp mkostemps mkstemp mkstemps
-    posix_openpt ptsname ptsname_r random random_r realpath rpmatch
-    secure_getenv setenv setstate setstate_r srandom srandom_r
-    strtod strtoll strtoull unlockpt unsetenv])
-])
-
-AC_DEFUN([gl_STDLIB_MODULE_INDICATOR],
-[
-  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
-  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
-  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
-  dnl Define it also as a C macro, for the benefit of the unit tests.
-  gl_MODULE_INDICATOR_FOR_TESTS([$1])
-])
-
-AC_DEFUN([gl_STDLIB_H_DEFAULTS],
-[
-  GNULIB__EXIT=0;         AC_SUBST([GNULIB__EXIT])
-  GNULIB_ATOLL=0;         AC_SUBST([GNULIB_ATOLL])
-  GNULIB_CALLOC_POSIX=0;  AC_SUBST([GNULIB_CALLOC_POSIX])
-  GNULIB_CANONICALIZE_FILE_NAME=0;  AC_SUBST([GNULIB_CANONICALIZE_FILE_NAME])
-  GNULIB_GETLOADAVG=0;    AC_SUBST([GNULIB_GETLOADAVG])
-  GNULIB_GETSUBOPT=0;     AC_SUBST([GNULIB_GETSUBOPT])
-  GNULIB_GRANTPT=0;       AC_SUBST([GNULIB_GRANTPT])
-  GNULIB_MALLOC_POSIX=0;  AC_SUBST([GNULIB_MALLOC_POSIX])
-  GNULIB_MBTOWC=0;        AC_SUBST([GNULIB_MBTOWC])
-  GNULIB_MKDTEMP=0;       AC_SUBST([GNULIB_MKDTEMP])
-  GNULIB_MKOSTEMP=0;      AC_SUBST([GNULIB_MKOSTEMP])
-  GNULIB_MKOSTEMPS=0;     AC_SUBST([GNULIB_MKOSTEMPS])
-  GNULIB_MKSTEMP=0;       AC_SUBST([GNULIB_MKSTEMP])
-  GNULIB_MKSTEMPS=0;      AC_SUBST([GNULIB_MKSTEMPS])
-  GNULIB_POSIX_OPENPT=0;  AC_SUBST([GNULIB_POSIX_OPENPT])
-  GNULIB_PTSNAME=0;       AC_SUBST([GNULIB_PTSNAME])
-  GNULIB_PTSNAME_R=0;     AC_SUBST([GNULIB_PTSNAME_R])
-  GNULIB_PUTENV=0;        AC_SUBST([GNULIB_PUTENV])
-  GNULIB_RANDOM=0;        AC_SUBST([GNULIB_RANDOM])
-  GNULIB_RANDOM_R=0;      AC_SUBST([GNULIB_RANDOM_R])
-  GNULIB_REALLOC_POSIX=0; AC_SUBST([GNULIB_REALLOC_POSIX])
-  GNULIB_REALPATH=0;      AC_SUBST([GNULIB_REALPATH])
-  GNULIB_RPMATCH=0;       AC_SUBST([GNULIB_RPMATCH])
-  GNULIB_SECURE_GETENV=0; AC_SUBST([GNULIB_SECURE_GETENV])
-  GNULIB_SETENV=0;        AC_SUBST([GNULIB_SETENV])
-  GNULIB_STRTOD=0;        AC_SUBST([GNULIB_STRTOD])
-  GNULIB_STRTOLL=0;       AC_SUBST([GNULIB_STRTOLL])
-  GNULIB_STRTOULL=0;      AC_SUBST([GNULIB_STRTOULL])
-  GNULIB_SYSTEM_POSIX=0;  AC_SUBST([GNULIB_SYSTEM_POSIX])
-  GNULIB_UNLOCKPT=0;      AC_SUBST([GNULIB_UNLOCKPT])
-  GNULIB_UNSETENV=0;      AC_SUBST([GNULIB_UNSETENV])
-  GNULIB_WCTOMB=0;        AC_SUBST([GNULIB_WCTOMB])
-  dnl Assume proper GNU behavior unless another module says otherwise.
-  HAVE__EXIT=1;              AC_SUBST([HAVE__EXIT])
-  HAVE_ATOLL=1;              AC_SUBST([HAVE_ATOLL])
-  HAVE_CANONICALIZE_FILE_NAME=1;  AC_SUBST([HAVE_CANONICALIZE_FILE_NAME])
-  HAVE_DECL_GETLOADAVG=1;    AC_SUBST([HAVE_DECL_GETLOADAVG])
-  HAVE_GETSUBOPT=1;          AC_SUBST([HAVE_GETSUBOPT])
-  HAVE_GRANTPT=1;            AC_SUBST([HAVE_GRANTPT])
-  HAVE_MKDTEMP=1;            AC_SUBST([HAVE_MKDTEMP])
-  HAVE_MKOSTEMP=1;           AC_SUBST([HAVE_MKOSTEMP])
-  HAVE_MKOSTEMPS=1;          AC_SUBST([HAVE_MKOSTEMPS])
-  HAVE_MKSTEMP=1;            AC_SUBST([HAVE_MKSTEMP])
-  HAVE_MKSTEMPS=1;           AC_SUBST([HAVE_MKSTEMPS])
-  HAVE_POSIX_OPENPT=1;       AC_SUBST([HAVE_POSIX_OPENPT])
-  HAVE_PTSNAME=1;            AC_SUBST([HAVE_PTSNAME])
-  HAVE_PTSNAME_R=1;          AC_SUBST([HAVE_PTSNAME_R])
-  HAVE_RANDOM=1;             AC_SUBST([HAVE_RANDOM])
-  HAVE_RANDOM_H=1;           AC_SUBST([HAVE_RANDOM_H])
-  HAVE_RANDOM_R=1;           AC_SUBST([HAVE_RANDOM_R])
-  HAVE_REALPATH=1;           AC_SUBST([HAVE_REALPATH])
-  HAVE_RPMATCH=1;            AC_SUBST([HAVE_RPMATCH])
-  HAVE_SECURE_GETENV=1;      AC_SUBST([HAVE_SECURE_GETENV])
-  HAVE_SETENV=1;             AC_SUBST([HAVE_SETENV])
-  HAVE_DECL_SETENV=1;        AC_SUBST([HAVE_DECL_SETENV])
-  HAVE_STRTOD=1;             AC_SUBST([HAVE_STRTOD])
-  HAVE_STRTOLL=1;            AC_SUBST([HAVE_STRTOLL])
-  HAVE_STRTOULL=1;           AC_SUBST([HAVE_STRTOULL])
-  HAVE_STRUCT_RANDOM_DATA=1; AC_SUBST([HAVE_STRUCT_RANDOM_DATA])
-  HAVE_SYS_LOADAVG_H=0;      AC_SUBST([HAVE_SYS_LOADAVG_H])
-  HAVE_UNLOCKPT=1;           AC_SUBST([HAVE_UNLOCKPT])
-  HAVE_DECL_UNSETENV=1;      AC_SUBST([HAVE_DECL_UNSETENV])
-  REPLACE_CALLOC=0;          AC_SUBST([REPLACE_CALLOC])
-  REPLACE_CANONICALIZE_FILE_NAME=0;  AC_SUBST([REPLACE_CANONICALIZE_FILE_NAME])
-  REPLACE_MALLOC=0;          AC_SUBST([REPLACE_MALLOC])
-  REPLACE_MBTOWC=0;          AC_SUBST([REPLACE_MBTOWC])
-  REPLACE_MKSTEMP=0;         AC_SUBST([REPLACE_MKSTEMP])
-  REPLACE_PTSNAME=0;         AC_SUBST([REPLACE_PTSNAME])
-  REPLACE_PTSNAME_R=0;       AC_SUBST([REPLACE_PTSNAME_R])
-  REPLACE_PUTENV=0;          AC_SUBST([REPLACE_PUTENV])
-  REPLACE_RANDOM_R=0;        AC_SUBST([REPLACE_RANDOM_R])
-  REPLACE_REALLOC=0;         AC_SUBST([REPLACE_REALLOC])
-  REPLACE_REALPATH=0;        AC_SUBST([REPLACE_REALPATH])
-  REPLACE_SETENV=0;          AC_SUBST([REPLACE_SETENV])
-  REPLACE_STRTOD=0;          AC_SUBST([REPLACE_STRTOD])
-  REPLACE_UNSETENV=0;        AC_SUBST([REPLACE_UNSETENV])
-  REPLACE_WCTOMB=0;          AC_SUBST([REPLACE_WCTOMB])
-])
diff --git a/m4/string_h.m4 b/m4/string_h.m4
deleted file mode 100644
index 64e683f9..00000000
--- a/m4/string_h.m4
+++ /dev/null
@@ -1,120 +0,0 @@
-# Configure a GNU-like replacement for <string.h>.
-
-# Copyright (C) 2007-2014 Free Software Foundation, Inc.
-# This file is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# serial 21
-
-# Written by Paul Eggert.
-
-AC_DEFUN([gl_HEADER_STRING_H],
-[
-  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
-  dnl once only, before all statements that occur in other macros.
-  AC_REQUIRE([gl_HEADER_STRING_H_BODY])
-])
-
-AC_DEFUN([gl_HEADER_STRING_H_BODY],
-[
-  AC_REQUIRE([AC_C_RESTRICT])
-  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
-  gl_NEXT_HEADERS([string.h])
-
-  dnl Check for declarations of anything we want to poison if the
-  dnl corresponding gnulib module is not in use, and which is not
-  dnl guaranteed by C89.
-  gl_WARN_ON_USE_PREPARE([[#include <string.h>
-    ]],
-    [ffsl ffsll memmem mempcpy memrchr rawmemchr stpcpy stpncpy strchrnul
-     strdup strncat strndup strnlen strpbrk strsep strcasestr strtok_r
-     strerror_r strsignal strverscmp])
-])
-
-AC_DEFUN([gl_STRING_MODULE_INDICATOR],
-[
-  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
-  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
-  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
-  dnl Define it also as a C macro, for the benefit of the unit tests.
-  gl_MODULE_INDICATOR_FOR_TESTS([$1])
-])
-
-AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
-[
-  GNULIB_FFSL=0;        AC_SUBST([GNULIB_FFSL])
-  GNULIB_FFSLL=0;       AC_SUBST([GNULIB_FFSLL])
-  GNULIB_MEMCHR=0;      AC_SUBST([GNULIB_MEMCHR])
-  GNULIB_MEMMEM=0;      AC_SUBST([GNULIB_MEMMEM])
-  GNULIB_MEMPCPY=0;     AC_SUBST([GNULIB_MEMPCPY])
-  GNULIB_MEMRCHR=0;     AC_SUBST([GNULIB_MEMRCHR])
-  GNULIB_RAWMEMCHR=0;   AC_SUBST([GNULIB_RAWMEMCHR])
-  GNULIB_STPCPY=0;      AC_SUBST([GNULIB_STPCPY])
-  GNULIB_STPNCPY=0;     AC_SUBST([GNULIB_STPNCPY])
-  GNULIB_STRCHRNUL=0;   AC_SUBST([GNULIB_STRCHRNUL])
-  GNULIB_STRDUP=0;      AC_SUBST([GNULIB_STRDUP])
-  GNULIB_STRNCAT=0;     AC_SUBST([GNULIB_STRNCAT])
-  GNULIB_STRNDUP=0;     AC_SUBST([GNULIB_STRNDUP])
-  GNULIB_STRNLEN=0;     AC_SUBST([GNULIB_STRNLEN])
-  GNULIB_STRPBRK=0;     AC_SUBST([GNULIB_STRPBRK])
-  GNULIB_STRSEP=0;      AC_SUBST([GNULIB_STRSEP])
-  GNULIB_STRSTR=0;      AC_SUBST([GNULIB_STRSTR])
-  GNULIB_STRCASESTR=0;  AC_SUBST([GNULIB_STRCASESTR])
-  GNULIB_STRTOK_R=0;    AC_SUBST([GNULIB_STRTOK_R])
-  GNULIB_MBSLEN=0;      AC_SUBST([GNULIB_MBSLEN])
-  GNULIB_MBSNLEN=0;     AC_SUBST([GNULIB_MBSNLEN])
-  GNULIB_MBSCHR=0;      AC_SUBST([GNULIB_MBSCHR])
-  GNULIB_MBSRCHR=0;     AC_SUBST([GNULIB_MBSRCHR])
-  GNULIB_MBSSTR=0;      AC_SUBST([GNULIB_MBSSTR])
-  GNULIB_MBSCASECMP=0;  AC_SUBST([GNULIB_MBSCASECMP])
-  GNULIB_MBSNCASECMP=0; AC_SUBST([GNULIB_MBSNCASECMP])
-  GNULIB_MBSPCASECMP=0; AC_SUBST([GNULIB_MBSPCASECMP])
-  GNULIB_MBSCASESTR=0;  AC_SUBST([GNULIB_MBSCASESTR])
-  GNULIB_MBSCSPN=0;     AC_SUBST([GNULIB_MBSCSPN])
-  GNULIB_MBSPBRK=0;     AC_SUBST([GNULIB_MBSPBRK])
-  GNULIB_MBSSPN=0;      AC_SUBST([GNULIB_MBSSPN])
-  GNULIB_MBSSEP=0;      AC_SUBST([GNULIB_MBSSEP])
-  GNULIB_MBSTOK_R=0;    AC_SUBST([GNULIB_MBSTOK_R])
-  GNULIB_STRERROR=0;    AC_SUBST([GNULIB_STRERROR])
-  GNULIB_STRERROR_R=0;  AC_SUBST([GNULIB_STRERROR_R])
-  GNULIB_STRSIGNAL=0;   AC_SUBST([GNULIB_STRSIGNAL])
-  GNULIB_STRVERSCMP=0;  AC_SUBST([GNULIB_STRVERSCMP])
-  HAVE_MBSLEN=0;        AC_SUBST([HAVE_MBSLEN])
-  dnl Assume proper GNU behavior unless another module says otherwise.
-  HAVE_FFSL=1;                  AC_SUBST([HAVE_FFSL])
-  HAVE_FFSLL=1;                 AC_SUBST([HAVE_FFSLL])
-  HAVE_MEMCHR=1;                AC_SUBST([HAVE_MEMCHR])
-  HAVE_DECL_MEMMEM=1;           AC_SUBST([HAVE_DECL_MEMMEM])
-  HAVE_MEMPCPY=1;               AC_SUBST([HAVE_MEMPCPY])
-  HAVE_DECL_MEMRCHR=1;          AC_SUBST([HAVE_DECL_MEMRCHR])
-  HAVE_RAWMEMCHR=1;             AC_SUBST([HAVE_RAWMEMCHR])
-  HAVE_STPCPY=1;                AC_SUBST([HAVE_STPCPY])
-  HAVE_STPNCPY=1;               AC_SUBST([HAVE_STPNCPY])
-  HAVE_STRCHRNUL=1;             AC_SUBST([HAVE_STRCHRNUL])
-  HAVE_DECL_STRDUP=1;           AC_SUBST([HAVE_DECL_STRDUP])
-  HAVE_DECL_STRNDUP=1;          AC_SUBST([HAVE_DECL_STRNDUP])
-  HAVE_DECL_STRNLEN=1;          AC_SUBST([HAVE_DECL_STRNLEN])
-  HAVE_STRPBRK=1;               AC_SUBST([HAVE_STRPBRK])
-  HAVE_STRSEP=1;                AC_SUBST([HAVE_STRSEP])
-  HAVE_STRCASESTR=1;            AC_SUBST([HAVE_STRCASESTR])
-  HAVE_DECL_STRTOK_R=1;         AC_SUBST([HAVE_DECL_STRTOK_R])
-  HAVE_DECL_STRERROR_R=1;       AC_SUBST([HAVE_DECL_STRERROR_R])
-  HAVE_DECL_STRSIGNAL=1;        AC_SUBST([HAVE_DECL_STRSIGNAL])
-  HAVE_STRVERSCMP=1;            AC_SUBST([HAVE_STRVERSCMP])
-  REPLACE_MEMCHR=0;             AC_SUBST([REPLACE_MEMCHR])
-  REPLACE_MEMMEM=0;             AC_SUBST([REPLACE_MEMMEM])
-  REPLACE_STPNCPY=0;            AC_SUBST([REPLACE_STPNCPY])
-  REPLACE_STRDUP=0;             AC_SUBST([REPLACE_STRDUP])
-  REPLACE_STRSTR=0;             AC_SUBST([REPLACE_STRSTR])
-  REPLACE_STRCASESTR=0;         AC_SUBST([REPLACE_STRCASESTR])
-  REPLACE_STRCHRNUL=0;          AC_SUBST([REPLACE_STRCHRNUL])
-  REPLACE_STRERROR=0;           AC_SUBST([REPLACE_STRERROR])
-  REPLACE_STRERROR_R=0;         AC_SUBST([REPLACE_STRERROR_R])
-  REPLACE_STRNCAT=0;            AC_SUBST([REPLACE_STRNCAT])
-  REPLACE_STRNDUP=0;            AC_SUBST([REPLACE_STRNDUP])
-  REPLACE_STRNLEN=0;            AC_SUBST([REPLACE_STRNLEN])
-  REPLACE_STRSIGNAL=0;          AC_SUBST([REPLACE_STRSIGNAL])
-  REPLACE_STRTOK_R=0;           AC_SUBST([REPLACE_STRTOK_R])
-  UNDEFINE_STRTOK_R=0;          AC_SUBST([UNDEFINE_STRTOK_R])
-])
diff --git a/m4/strndup.m4 b/m4/strndup.m4
deleted file mode 100644
index 55df0399..00000000
--- a/m4/strndup.m4
+++ /dev/null
@@ -1,55 +0,0 @@
-# strndup.m4 serial 21
-dnl Copyright (C) 2002-2003, 2005-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_FUNC_STRNDUP],
-[
-  dnl Persuade glibc <string.h> to declare strndup().
-  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-
-  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
-  AC_CHECK_DECLS_ONCE([strndup])
-  AC_CHECK_FUNCS_ONCE([strndup])
-  if test $ac_cv_have_decl_strndup = no; then
-    HAVE_DECL_STRNDUP=0
-  fi
-
-  if test $ac_cv_func_strndup = yes; then
-    HAVE_STRNDUP=1
-    # AIX 4.3.3, AIX 5.1 have a function that fails to add the terminating '\0'.
-    AC_CACHE_CHECK([for working strndup], [gl_cv_func_strndup_works],
-      [AC_RUN_IFELSE([
-         AC_LANG_PROGRAM([[#include <string.h>
-                           #include <stdlib.h>]], [[
-#if !HAVE_DECL_STRNDUP
-  extern
-  #ifdef __cplusplus
-  "C"
-  #endif
-  char *strndup (const char *, size_t);
-#endif
-  char *s;
-  s = strndup ("some longer string", 15);
-  free (s);
-  s = strndup ("shorter string", 13);
-  return s[13] != '\0';]])],
-         [gl_cv_func_strndup_works=yes],
-         [gl_cv_func_strndup_works=no],
-         [
-changequote(,)dnl
-          case $host_os in
-            aix | aix[3-6]*) gl_cv_func_strndup_works="guessing no";;
-            *)               gl_cv_func_strndup_works="guessing yes";;
-          esac
-changequote([,])dnl
-         ])])
-    case $gl_cv_func_strndup_works in
-      *no) REPLACE_STRNDUP=1 ;;
-    esac
-  else
-    HAVE_STRNDUP=0
-  fi
-])
diff --git a/m4/strnlen.m4 b/m4/strnlen.m4
deleted file mode 100644
index 94317f8a..00000000
--- a/m4/strnlen.m4
+++ /dev/null
@@ -1,30 +0,0 @@
-# strnlen.m4 serial 13
-dnl Copyright (C) 2002-2003, 2005-2007, 2009-2014 Free Software Foundation,
-dnl Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_FUNC_STRNLEN],
-[
-  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
-
-  dnl Persuade glibc <string.h> to declare strnlen().
-  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-
-  AC_CHECK_DECLS_ONCE([strnlen])
-  if test $ac_cv_have_decl_strnlen = no; then
-    HAVE_DECL_STRNLEN=0
-  else
-    m4_pushdef([AC_LIBOBJ], [:])
-    dnl Note: AC_FUNC_STRNLEN does AC_LIBOBJ([strnlen]).
-    AC_FUNC_STRNLEN
-    m4_popdef([AC_LIBOBJ])
-    if test $ac_cv_func_strnlen_working = no; then
-      REPLACE_STRNLEN=1
-    fi
-  fi
-])
-
-# Prerequisites of lib/strnlen.c.
-AC_DEFUN([gl_PREREQ_STRNLEN], [:])
diff --git a/m4/sys_ioctl_h.m4 b/m4/sys_ioctl_h.m4
deleted file mode 100644
index 16542319..00000000
--- a/m4/sys_ioctl_h.m4
+++ /dev/null
@@ -1,64 +0,0 @@
-# sys_ioctl_h.m4 serial 10
-dnl Copyright (C) 2008-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl Written by Bruno Haible.
-
-AC_DEFUN([gl_SYS_IOCTL_H],
-[
-  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
-  dnl once only, before all statements that occur in other macros.
-  AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
-
-  AC_CHECK_HEADERS_ONCE([sys/ioctl.h])
-  if test $ac_cv_header_sys_ioctl_h = yes; then
-    HAVE_SYS_IOCTL_H=1
-    dnl Test whether <sys/ioctl.h> declares ioctl(), or whether some other
-    dnl header file, such as <unistd.h> or <stropts.h>, is needed for that.
-    AC_CACHE_CHECK([whether <sys/ioctl.h> declares ioctl],
-      [gl_cv_decl_ioctl_in_sys_ioctl_h],
-      [dnl We cannot use AC_CHECK_DECL because it produces its own messages.
-       AC_COMPILE_IFELSE(
-         [AC_LANG_PROGRAM(
-            [AC_INCLUDES_DEFAULT([#include <sys/ioctl.h>])],
-            [(void) ioctl;])],
-         [gl_cv_decl_ioctl_in_sys_ioctl_h=yes],
-         [gl_cv_decl_ioctl_in_sys_ioctl_h=no])
-      ])
-  else
-    HAVE_SYS_IOCTL_H=0
-  fi
-  AC_SUBST([HAVE_SYS_IOCTL_H])
-  dnl <sys/ioctl.h> is always overridden, because of GNULIB_POSIXCHECK.
-  gl_CHECK_NEXT_HEADERS([sys/ioctl.h])
-
-  dnl Check for declarations of anything we want to poison if the
-  dnl corresponding gnulib module is not in use.
-  gl_WARN_ON_USE_PREPARE([[#include <sys/ioctl.h>
-/* Some platforms declare ioctl in the wrong header.  */
-#if !(defined __GLIBC__ && !defined __UCLIBC__)
-# include <unistd.h>
-#endif
-    ]], [ioctl])
-])
-
-AC_DEFUN([gl_SYS_IOCTL_MODULE_INDICATOR],
-[
-  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
-  AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])
-  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
-  dnl Define it also as a C macro, for the benefit of the unit tests.
-  gl_MODULE_INDICATOR_FOR_TESTS([$1])
-])
-
-AC_DEFUN([gl_SYS_IOCTL_H_DEFAULTS],
-[
-  GNULIB_IOCTL=0;         AC_SUBST([GNULIB_IOCTL])
-  dnl Assume proper GNU behavior unless another module says otherwise.
-  SYS_IOCTL_H_HAVE_WINSOCK2_H=0; AC_SUBST([SYS_IOCTL_H_HAVE_WINSOCK2_H])
-  SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
-                        AC_SUBST([SYS_IOCTL_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS])
-  REPLACE_IOCTL=0;      AC_SUBST([REPLACE_IOCTL])
-])
diff --git a/m4/sys_socket_h.m4 b/m4/sys_socket_h.m4
deleted file mode 100644
index 114d8281..00000000
--- a/m4/sys_socket_h.m4
+++ /dev/null
@@ -1,176 +0,0 @@
-# sys_socket_h.m4 serial 23
-dnl Copyright (C) 2005-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl From Simon Josefsson.
-
-AC_DEFUN([gl_HEADER_SYS_SOCKET],
-[
-  AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
-  AC_REQUIRE([AC_CANONICAL_HOST])
-
-  dnl On OSF/1, the functions recv(), send(), recvfrom(), sendto() have
-  dnl old-style declarations (with return type 'int' instead of 'ssize_t')
-  dnl unless _POSIX_PII_SOCKET is defined.
-  case "$host_os" in
-    osf*)
-      AC_DEFINE([_POSIX_PII_SOCKET], [1],
-        [Define to 1 in order to get the POSIX compatible declarations
-         of socket functions.])
-      ;;
-  esac
-
-  AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
-    [gl_cv_header_sys_socket_h_selfcontained],
-    [
-      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
-        [gl_cv_header_sys_socket_h_selfcontained=yes],
-        [gl_cv_header_sys_socket_h_selfcontained=no])
-    ])
-  if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
-    dnl If the shutdown function exists, <sys/socket.h> should define
-    dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
-    AC_CHECK_FUNCS([shutdown])
-    if test $ac_cv_func_shutdown = yes; then
-      AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
-        [gl_cv_header_sys_socket_h_shut],
-        [
-          AC_COMPILE_IFELSE(
-            [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
-               [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
-            [gl_cv_header_sys_socket_h_shut=yes],
-            [gl_cv_header_sys_socket_h_shut=no])
-        ])
-      if test $gl_cv_header_sys_socket_h_shut = no; then
-        SYS_SOCKET_H='sys/socket.h'
-      fi
-    fi
-  fi
-  # We need to check for ws2tcpip.h now.
-  gl_PREREQ_SYS_H_SOCKET
-  AC_CHECK_TYPES([struct sockaddr_storage, sa_family_t],,,[
-  /* sys/types.h is not needed according to POSIX, but the
-     sys/socket.h in i386-unknown-freebsd4.10 and
-     powerpc-apple-darwin5.5 required it. */
-#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_WS2TCPIP_H
-#include <ws2tcpip.h>
-#endif
-])
-  if test $ac_cv_type_struct_sockaddr_storage = no; then
-    HAVE_STRUCT_SOCKADDR_STORAGE=0
-  fi
-  if test $ac_cv_type_sa_family_t = no; then
-    HAVE_SA_FAMILY_T=0
-  fi
-  if test $ac_cv_type_struct_sockaddr_storage != no; then
-    AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],
-      [],
-      [HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=0],
-      [#include <sys/types.h>
-       #ifdef HAVE_SYS_SOCKET_H
-       #include <sys/socket.h>
-       #endif
-       #ifdef HAVE_WS2TCPIP_H
-       #include <ws2tcpip.h>
-       #endif
-      ])
-  fi
-  if test $HAVE_STRUCT_SOCKADDR_STORAGE = 0 || test $HAVE_SA_FAMILY_T = 0 \
-     || test $HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = 0; then
-    SYS_SOCKET_H='sys/socket.h'
-  fi
-  gl_PREREQ_SYS_H_WINSOCK2
-
-  dnl Check for declarations of anything we want to poison if the
-  dnl corresponding gnulib module is not in use.
-  gl_WARN_ON_USE_PREPARE([[
-/* Some systems require prerequisite headers.  */
-#include <sys/types.h>
-#include <sys/socket.h>
-    ]], [socket connect accept bind getpeername getsockname getsockopt
-    listen recv send recvfrom sendto setsockopt shutdown accept4])
-])
-
-AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
-[
-  dnl Check prerequisites of the <sys/socket.h> replacement.
-  AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
-  gl_CHECK_NEXT_HEADERS([sys/socket.h])
-  if test $ac_cv_header_sys_socket_h = yes; then
-    HAVE_SYS_SOCKET_H=1
-    HAVE_WS2TCPIP_H=0
-  else
-    HAVE_SYS_SOCKET_H=0
-    if test $ac_cv_header_ws2tcpip_h = yes; then
-      HAVE_WS2TCPIP_H=1
-    else
-      HAVE_WS2TCPIP_H=0
-    fi
-  fi
-  AC_SUBST([HAVE_SYS_SOCKET_H])
-  AC_SUBST([HAVE_WS2TCPIP_H])
-])
-
-# Common prerequisites of the <sys/socket.h> replacement and of the
-# <sys/select.h> replacement.
-# Sets and substitutes HAVE_WINSOCK2_H.
-AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
-[
-  m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
-  m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
-  AC_CHECK_HEADERS_ONCE([sys/socket.h])
-  if test $ac_cv_header_sys_socket_h != yes; then
-    dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
-    dnl the check for those headers unconditional; yet cygwin reports
-    dnl that the headers are present but cannot be compiled (since on
-    dnl cygwin, all socket information should come from sys/socket.h).
-    AC_CHECK_HEADERS([winsock2.h])
-  fi
-  if test "$ac_cv_header_winsock2_h" = yes; then
-    HAVE_WINSOCK2_H=1
-    UNISTD_H_HAVE_WINSOCK2_H=1
-    SYS_IOCTL_H_HAVE_WINSOCK2_H=1
-  else
-    HAVE_WINSOCK2_H=0
-  fi
-  AC_SUBST([HAVE_WINSOCK2_H])
-])
-
-AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
-[
-  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
-  AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
-  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
-  dnl Define it also as a C macro, for the benefit of the unit tests.
-  gl_MODULE_INDICATOR_FOR_TESTS([$1])
-])
-
-AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
-[
-  GNULIB_SOCKET=0;      AC_SUBST([GNULIB_SOCKET])
-  GNULIB_CONNECT=0;     AC_SUBST([GNULIB_CONNECT])
-  GNULIB_ACCEPT=0;      AC_SUBST([GNULIB_ACCEPT])
-  GNULIB_BIND=0;        AC_SUBST([GNULIB_BIND])
-  GNULIB_GETPEERNAME=0; AC_SUBST([GNULIB_GETPEERNAME])
-  GNULIB_GETSOCKNAME=0; AC_SUBST([GNULIB_GETSOCKNAME])
-  GNULIB_GETSOCKOPT=0;  AC_SUBST([GNULIB_GETSOCKOPT])
-  GNULIB_LISTEN=0;      AC_SUBST([GNULIB_LISTEN])
-  GNULIB_RECV=0;        AC_SUBST([GNULIB_RECV])
-  GNULIB_SEND=0;        AC_SUBST([GNULIB_SEND])
-  GNULIB_RECVFROM=0;    AC_SUBST([GNULIB_RECVFROM])
-  GNULIB_SENDTO=0;      AC_SUBST([GNULIB_SENDTO])
-  GNULIB_SETSOCKOPT=0;  AC_SUBST([GNULIB_SETSOCKOPT])
-  GNULIB_SHUTDOWN=0;    AC_SUBST([GNULIB_SHUTDOWN])
-  GNULIB_ACCEPT4=0;     AC_SUBST([GNULIB_ACCEPT4])
-  HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
-  HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=1;
-                        AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY])
-  HAVE_SA_FAMILY_T=1;   AC_SUBST([HAVE_SA_FAMILY_T])
-  HAVE_ACCEPT4=1;       AC_SUBST([HAVE_ACCEPT4])
-])
diff --git a/m4/sys_types_h.m4 b/m4/sys_types_h.m4
deleted file mode 100644
index 9748905b..00000000
--- a/m4/sys_types_h.m4
+++ /dev/null
@@ -1,24 +0,0 @@
-# sys_types_h.m4 serial 5
-dnl Copyright (C) 2011-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN_ONCE([gl_SYS_TYPES_H],
-[
-  AC_REQUIRE([gl_SYS_TYPES_H_DEFAULTS])
-  gl_NEXT_HEADERS([sys/types.h])
-
-  dnl Ensure the type pid_t gets defined.
-  AC_REQUIRE([AC_TYPE_PID_T])
-
-  dnl Ensure the type mode_t gets defined.
-  AC_REQUIRE([AC_TYPE_MODE_T])
-
-  dnl Whether to override the 'off_t' type.
-  AC_REQUIRE([gl_TYPE_OFF_T])
-])
-
-AC_DEFUN([gl_SYS_TYPES_H_DEFAULTS],
-[
-])
diff --git a/m4/sys_uio_h.m4 b/m4/sys_uio_h.m4
deleted file mode 100644
index ba6b4b5e..00000000
--- a/m4/sys_uio_h.m4
+++ /dev/null
@@ -1,31 +0,0 @@
-# sys_uio_h.m4 serial 1
-dnl Copyright (C) 2011-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_HEADER_SYS_UIO],
-[
-  AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS])
-  dnl <sys/uio.h> is always overridden, because of GNULIB_POSIXCHECK.
-  gl_CHECK_NEXT_HEADERS([sys/uio.h])
-  if test $ac_cv_header_sys_uio_h = yes; then
-    HAVE_SYS_UIO_H=1
-  else
-    HAVE_SYS_UIO_H=0
-  fi
-  AC_SUBST([HAVE_SYS_UIO_H])
-])
-
-AC_DEFUN([gl_SYS_UIO_MODULE_INDICATOR],
-[
-  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
-  AC_REQUIRE([gl_SYS_UIO_H_DEFAULTS])
-  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
-  dnl Define it also as a C macro, for the benefit of the unit tests.
-  gl_MODULE_INDICATOR_FOR_TESTS([$1])
-])
-
-AC_DEFUN([gl_SYS_UIO_H_DEFAULTS],
-[
-])
diff --git a/m4/unistd_h.m4 b/m4/unistd_h.m4
deleted file mode 100644
index 1fa197e6..00000000
--- a/m4/unistd_h.m4
+++ /dev/null
@@ -1,187 +0,0 @@
-# unistd_h.m4 serial 67
-dnl Copyright (C) 2006-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl Written by Simon Josefsson, Bruno Haible.
-
-AC_DEFUN([gl_UNISTD_H],
-[
-  dnl Use AC_REQUIRE here, so that the default behavior below is expanded
-  dnl once only, before all statements that occur in other macros.
-  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
-
-  gl_CHECK_NEXT_HEADERS([unistd.h])
-  if test $ac_cv_header_unistd_h = yes; then
-    HAVE_UNISTD_H=1
-  else
-    HAVE_UNISTD_H=0
-  fi
-  AC_SUBST([HAVE_UNISTD_H])
-
-  dnl Ensure the type pid_t gets defined.
-  AC_REQUIRE([AC_TYPE_PID_T])
-
-  dnl Determine WINDOWS_64_BIT_OFF_T.
-  AC_REQUIRE([gl_TYPE_OFF_T])
-
-  dnl Check for declarations of anything we want to poison if the
-  dnl corresponding gnulib module is not in use.
-  gl_WARN_ON_USE_PREPARE([[
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-/* Some systems declare various items in the wrong headers.  */
-#if !(defined __GLIBC__ && !defined __UCLIBC__)
-# include <fcntl.h>
-# include <stdio.h>
-# include <stdlib.h>
-# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
-#  include <io.h>
-# endif
-#endif
-    ]], [chdir chown dup dup2 dup3 environ euidaccess faccessat fchdir fchownat
-    fdatasync fsync ftruncate getcwd getdomainname getdtablesize getgroups
-    gethostname getlogin getlogin_r getpagesize
-    getusershell setusershell endusershell
-    group_member isatty lchown link linkat lseek pipe pipe2 pread pwrite
-    readlink readlinkat rmdir sethostname sleep symlink symlinkat ttyname_r
-    unlink unlinkat usleep])
-])
-
-AC_DEFUN([gl_UNISTD_MODULE_INDICATOR],
-[
-  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
-  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
-  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
-  dnl Define it also as a C macro, for the benefit of the unit tests.
-  gl_MODULE_INDICATOR_FOR_TESTS([$1])
-])
-
-AC_DEFUN([gl_UNISTD_H_DEFAULTS],
-[
-  GNULIB_CHDIR=0;                AC_SUBST([GNULIB_CHDIR])
-  GNULIB_CHOWN=0;                AC_SUBST([GNULIB_CHOWN])
-  GNULIB_CLOSE=0;                AC_SUBST([GNULIB_CLOSE])
-  GNULIB_DUP=0;                  AC_SUBST([GNULIB_DUP])
-  GNULIB_DUP2=0;                 AC_SUBST([GNULIB_DUP2])
-  GNULIB_DUP3=0;                 AC_SUBST([GNULIB_DUP3])
-  GNULIB_ENVIRON=0;              AC_SUBST([GNULIB_ENVIRON])
-  GNULIB_EUIDACCESS=0;           AC_SUBST([GNULIB_EUIDACCESS])
-  GNULIB_FACCESSAT=0;            AC_SUBST([GNULIB_FACCESSAT])
-  GNULIB_FCHDIR=0;               AC_SUBST([GNULIB_FCHDIR])
-  GNULIB_FCHOWNAT=0;             AC_SUBST([GNULIB_FCHOWNAT])
-  GNULIB_FDATASYNC=0;            AC_SUBST([GNULIB_FDATASYNC])
-  GNULIB_FSYNC=0;                AC_SUBST([GNULIB_FSYNC])
-  GNULIB_FTRUNCATE=0;            AC_SUBST([GNULIB_FTRUNCATE])
-  GNULIB_GETCWD=0;               AC_SUBST([GNULIB_GETCWD])
-  GNULIB_GETDOMAINNAME=0;        AC_SUBST([GNULIB_GETDOMAINNAME])
-  GNULIB_GETDTABLESIZE=0;        AC_SUBST([GNULIB_GETDTABLESIZE])
-  GNULIB_GETGROUPS=0;            AC_SUBST([GNULIB_GETGROUPS])
-  GNULIB_GETHOSTNAME=0;          AC_SUBST([GNULIB_GETHOSTNAME])
-  GNULIB_GETLOGIN=0;             AC_SUBST([GNULIB_GETLOGIN])
-  GNULIB_GETLOGIN_R=0;           AC_SUBST([GNULIB_GETLOGIN_R])
-  GNULIB_GETPAGESIZE=0;          AC_SUBST([GNULIB_GETPAGESIZE])
-  GNULIB_GETUSERSHELL=0;         AC_SUBST([GNULIB_GETUSERSHELL])
-  GNULIB_GROUP_MEMBER=0;         AC_SUBST([GNULIB_GROUP_MEMBER])
-  GNULIB_ISATTY=0;               AC_SUBST([GNULIB_ISATTY])
-  GNULIB_LCHOWN=0;               AC_SUBST([GNULIB_LCHOWN])
-  GNULIB_LINK=0;                 AC_SUBST([GNULIB_LINK])
-  GNULIB_LINKAT=0;               AC_SUBST([GNULIB_LINKAT])
-  GNULIB_LSEEK=0;                AC_SUBST([GNULIB_LSEEK])
-  GNULIB_PIPE=0;                 AC_SUBST([GNULIB_PIPE])
-  GNULIB_PIPE2=0;                AC_SUBST([GNULIB_PIPE2])
-  GNULIB_PREAD=0;                AC_SUBST([GNULIB_PREAD])
-  GNULIB_PWRITE=0;               AC_SUBST([GNULIB_PWRITE])
-  GNULIB_READ=0;                 AC_SUBST([GNULIB_READ])
-  GNULIB_READLINK=0;             AC_SUBST([GNULIB_READLINK])
-  GNULIB_READLINKAT=0;           AC_SUBST([GNULIB_READLINKAT])
-  GNULIB_RMDIR=0;                AC_SUBST([GNULIB_RMDIR])
-  GNULIB_SETHOSTNAME=0;          AC_SUBST([GNULIB_SETHOSTNAME])
-  GNULIB_SLEEP=0;                AC_SUBST([GNULIB_SLEEP])
-  GNULIB_SYMLINK=0;              AC_SUBST([GNULIB_SYMLINK])
-  GNULIB_SYMLINKAT=0;            AC_SUBST([GNULIB_SYMLINKAT])
-  GNULIB_TTYNAME_R=0;            AC_SUBST([GNULIB_TTYNAME_R])
-  GNULIB_UNISTD_H_NONBLOCKING=0; AC_SUBST([GNULIB_UNISTD_H_NONBLOCKING])
-  GNULIB_UNISTD_H_SIGPIPE=0;     AC_SUBST([GNULIB_UNISTD_H_SIGPIPE])
-  GNULIB_UNLINK=0;               AC_SUBST([GNULIB_UNLINK])
-  GNULIB_UNLINKAT=0;             AC_SUBST([GNULIB_UNLINKAT])
-  GNULIB_USLEEP=0;               AC_SUBST([GNULIB_USLEEP])
-  GNULIB_WRITE=0;                AC_SUBST([GNULIB_WRITE])
-  dnl Assume proper GNU behavior unless another module says otherwise.
-  HAVE_CHOWN=1;           AC_SUBST([HAVE_CHOWN])
-  HAVE_DUP2=1;            AC_SUBST([HAVE_DUP2])
-  HAVE_DUP3=1;            AC_SUBST([HAVE_DUP3])
-  HAVE_EUIDACCESS=1;      AC_SUBST([HAVE_EUIDACCESS])
-  HAVE_FACCESSAT=1;       AC_SUBST([HAVE_FACCESSAT])
-  HAVE_FCHDIR=1;          AC_SUBST([HAVE_FCHDIR])
-  HAVE_FCHOWNAT=1;        AC_SUBST([HAVE_FCHOWNAT])
-  HAVE_FDATASYNC=1;       AC_SUBST([HAVE_FDATASYNC])
-  HAVE_FSYNC=1;           AC_SUBST([HAVE_FSYNC])
-  HAVE_FTRUNCATE=1;       AC_SUBST([HAVE_FTRUNCATE])
-  HAVE_GETDTABLESIZE=1;   AC_SUBST([HAVE_GETDTABLESIZE])
-  HAVE_GETGROUPS=1;       AC_SUBST([HAVE_GETGROUPS])
-  HAVE_GETHOSTNAME=1;     AC_SUBST([HAVE_GETHOSTNAME])
-  HAVE_GETLOGIN=1;        AC_SUBST([HAVE_GETLOGIN])
-  HAVE_GETPAGESIZE=1;     AC_SUBST([HAVE_GETPAGESIZE])
-  HAVE_GROUP_MEMBER=1;    AC_SUBST([HAVE_GROUP_MEMBER])
-  HAVE_LCHOWN=1;          AC_SUBST([HAVE_LCHOWN])
-  HAVE_LINK=1;            AC_SUBST([HAVE_LINK])
-  HAVE_LINKAT=1;          AC_SUBST([HAVE_LINKAT])
-  HAVE_PIPE=1;            AC_SUBST([HAVE_PIPE])
-  HAVE_PIPE2=1;           AC_SUBST([HAVE_PIPE2])
-  HAVE_PREAD=1;           AC_SUBST([HAVE_PREAD])
-  HAVE_PWRITE=1;          AC_SUBST([HAVE_PWRITE])
-  HAVE_READLINK=1;        AC_SUBST([HAVE_READLINK])
-  HAVE_READLINKAT=1;      AC_SUBST([HAVE_READLINKAT])
-  HAVE_SETHOSTNAME=1;     AC_SUBST([HAVE_SETHOSTNAME])
-  HAVE_SLEEP=1;           AC_SUBST([HAVE_SLEEP])
-  HAVE_SYMLINK=1;         AC_SUBST([HAVE_SYMLINK])
-  HAVE_SYMLINKAT=1;       AC_SUBST([HAVE_SYMLINKAT])
-  HAVE_UNLINKAT=1;        AC_SUBST([HAVE_UNLINKAT])
-  HAVE_USLEEP=1;          AC_SUBST([HAVE_USLEEP])
-  HAVE_DECL_ENVIRON=1;    AC_SUBST([HAVE_DECL_ENVIRON])
-  HAVE_DECL_FCHDIR=1;     AC_SUBST([HAVE_DECL_FCHDIR])
-  HAVE_DECL_FDATASYNC=1;  AC_SUBST([HAVE_DECL_FDATASYNC])
-  HAVE_DECL_GETDOMAINNAME=1; AC_SUBST([HAVE_DECL_GETDOMAINNAME])
-  HAVE_DECL_GETLOGIN_R=1; AC_SUBST([HAVE_DECL_GETLOGIN_R])
-  HAVE_DECL_GETPAGESIZE=1; AC_SUBST([HAVE_DECL_GETPAGESIZE])
-  HAVE_DECL_GETUSERSHELL=1; AC_SUBST([HAVE_DECL_GETUSERSHELL])
-  HAVE_DECL_SETHOSTNAME=1; AC_SUBST([HAVE_DECL_SETHOSTNAME])
-  HAVE_DECL_TTYNAME_R=1;  AC_SUBST([HAVE_DECL_TTYNAME_R])
-  HAVE_OS_H=0;            AC_SUBST([HAVE_OS_H])
-  HAVE_SYS_PARAM_H=0;     AC_SUBST([HAVE_SYS_PARAM_H])
-  REPLACE_CHOWN=0;        AC_SUBST([REPLACE_CHOWN])
-  REPLACE_CLOSE=0;        AC_SUBST([REPLACE_CLOSE])
-  REPLACE_DUP=0;          AC_SUBST([REPLACE_DUP])
-  REPLACE_DUP2=0;         AC_SUBST([REPLACE_DUP2])
-  REPLACE_FCHOWNAT=0;     AC_SUBST([REPLACE_FCHOWNAT])
-  REPLACE_FTRUNCATE=0;    AC_SUBST([REPLACE_FTRUNCATE])
-  REPLACE_GETCWD=0;       AC_SUBST([REPLACE_GETCWD])
-  REPLACE_GETDOMAINNAME=0; AC_SUBST([REPLACE_GETDOMAINNAME])
-  REPLACE_GETDTABLESIZE=0; AC_SUBST([REPLACE_GETDTABLESIZE])
-  REPLACE_GETLOGIN_R=0;   AC_SUBST([REPLACE_GETLOGIN_R])
-  REPLACE_GETGROUPS=0;    AC_SUBST([REPLACE_GETGROUPS])
-  REPLACE_GETPAGESIZE=0;  AC_SUBST([REPLACE_GETPAGESIZE])
-  REPLACE_ISATTY=0;       AC_SUBST([REPLACE_ISATTY])
-  REPLACE_LCHOWN=0;       AC_SUBST([REPLACE_LCHOWN])
-  REPLACE_LINK=0;         AC_SUBST([REPLACE_LINK])
-  REPLACE_LINKAT=0;       AC_SUBST([REPLACE_LINKAT])
-  REPLACE_LSEEK=0;        AC_SUBST([REPLACE_LSEEK])
-  REPLACE_PREAD=0;        AC_SUBST([REPLACE_PREAD])
-  REPLACE_PWRITE=0;       AC_SUBST([REPLACE_PWRITE])
-  REPLACE_READ=0;         AC_SUBST([REPLACE_READ])
-  REPLACE_READLINK=0;     AC_SUBST([REPLACE_READLINK])
-  REPLACE_RMDIR=0;        AC_SUBST([REPLACE_RMDIR])
-  REPLACE_SLEEP=0;        AC_SUBST([REPLACE_SLEEP])
-  REPLACE_SYMLINK=0;      AC_SUBST([REPLACE_SYMLINK])
-  REPLACE_TTYNAME_R=0;    AC_SUBST([REPLACE_TTYNAME_R])
-  REPLACE_UNLINK=0;       AC_SUBST([REPLACE_UNLINK])
-  REPLACE_UNLINKAT=0;     AC_SUBST([REPLACE_UNLINKAT])
-  REPLACE_USLEEP=0;       AC_SUBST([REPLACE_USLEEP])
-  REPLACE_WRITE=0;        AC_SUBST([REPLACE_WRITE])
-  UNISTD_H_HAVE_WINSOCK2_H=0; AC_SUBST([UNISTD_H_HAVE_WINSOCK2_H])
-  UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS=0;
-                           AC_SUBST([UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS])
-])
diff --git a/m4/warn-on-use.m4 b/m4/warn-on-use.m4
deleted file mode 100644
index cc690f8e..00000000
--- a/m4/warn-on-use.m4
+++ /dev/null
@@ -1,47 +0,0 @@
-# warn-on-use.m4 serial 5
-dnl Copyright (C) 2010-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-# gl_WARN_ON_USE_PREPARE(INCLUDES, NAMES)
-# ---------------------------------------
-# For each whitespace-separated element in the list of NAMES, define
-# HAVE_RAW_DECL_name if the function has a declaration among INCLUDES
-# even after being undefined as a macro.
-#
-# See warn-on-use.h for some hints on how to poison function names, as
-# well as ideas on poisoning global variables and macros.  NAMES may
-# include global variables, but remember that only functions work with
-# _GL_WARN_ON_USE.  Typically, INCLUDES only needs to list a single
-# header, but if the replacement header pulls in other headers because
-# some systems declare functions in the wrong header, then INCLUDES
-# should do likewise.
-#
-# It is generally safe to assume declarations for functions declared
-# in the intersection of C89 and C11 (such as printf) without
-# needing gl_WARN_ON_USE_PREPARE.
-AC_DEFUN([gl_WARN_ON_USE_PREPARE],
-[
-  m4_foreach_w([gl_decl], [$2],
-    [AH_TEMPLATE([HAVE_RAW_DECL_]AS_TR_CPP(m4_defn([gl_decl])),
-      [Define to 1 if ]m4_defn([gl_decl])[ is declared even after
-       undefining macros.])])dnl
-dnl FIXME: gl_Symbol must be used unquoted until we can assume
-dnl autoconf 2.64 or newer.
-  for gl_func in m4_flatten([$2]); do
-    AS_VAR_PUSHDEF([gl_Symbol], [gl_cv_have_raw_decl_$gl_func])dnl
-    AC_CACHE_CHECK([whether $gl_func is declared without a macro],
-      gl_Symbol,
-      [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$1],
-[@%:@undef $gl_func
-  (void) $gl_func;])],
-        [AS_VAR_SET(gl_Symbol, [yes])], [AS_VAR_SET(gl_Symbol, [no])])])
-    AS_VAR_IF(gl_Symbol, [yes],
-      [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_RAW_DECL_$gl_func]), [1])
-       dnl shortcut - if the raw declaration exists, then set a cache
-       dnl variable to allow skipping any later AC_CHECK_DECL efforts
-       eval ac_cv_have_decl_$gl_func=yes])
-    AS_VAR_POPDEF([gl_Symbol])dnl
-  done
-])
diff --git a/m4/wchar_t.m4 b/m4/wchar_t.m4
deleted file mode 100644
index 839a04c1..00000000
--- a/m4/wchar_t.m4
+++ /dev/null
@@ -1,24 +0,0 @@
-# wchar_t.m4 serial 4 (gettext-0.18.2)
-dnl Copyright (C) 2002-2003, 2008-2014 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl From Bruno Haible.
-dnl Test whether <stddef.h> has the 'wchar_t' type.
-dnl Prerequisite: AC_PROG_CC
-
-AC_DEFUN([gt_TYPE_WCHAR_T],
-[
-  AC_CACHE_CHECK([for wchar_t], [gt_cv_c_wchar_t],
-    [AC_COMPILE_IFELSE(
-       [AC_LANG_PROGRAM(
-          [[#include <stddef.h>
-            wchar_t foo = (wchar_t)'\0';]],
-          [[]])],
-       [gt_cv_c_wchar_t=yes],
-       [gt_cv_c_wchar_t=no])])
-  if test $gt_cv_c_wchar_t = yes; then
-    AC_DEFINE([HAVE_WCHAR_T], [1], [Define if you have the 'wchar_t' type.])
-  fi
-])