Remove autotools

15 files changed, 0 insertions, 1682 deletions

diff --git a/m4/00gnulib.m4 b/m4/00gnulib.m4
deleted file mode 100644
index d978cb8..0000000
--- a/m4/00gnulib.m4
+++ /dev/null
@@ -1,30 +0,0 @@
-# 00gnulib.m4 serial 2
-dnl Copyright (C) 2009-2012 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 semantics.
-
-# 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/extensions.m4 b/m4/extensions.m4
deleted file mode 100644
index 0bfaef6..0000000
--- a/m4/extensions.m4
+++ /dev/null
@@ -1,123 +0,0 @@
-# serial 11  -*- Autoconf -*-
-# Enable extensions on systems that normally disable them.
-
-# Copyright (C) 2003, 2006-2012 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 CVS
-# Autoconf.  Perhaps we can remove this once we can assume Autoconf
-# 2.62 or later everywhere, but since CVS 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([$0], [AC_RUN_IFELSE])dnl
-
-  AC_REQUIRE([AC_CANONICAL_HOST])
-
-  AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=])
-  if test "$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.])
-  fi
-
-  dnl HP-UX 11.11 defines mbstate_t only if _XOPEN_SOURCE is defined to 500,
-  dnl regardless of whether the flags -Ae or _D_HPUX_SOURCE=1 are already
-  dnl provided.
-  case "$host_os" in
-    hpux*)
-      AC_DEFINE([_XOPEN_SOURCE], [500],
-        [Define to 500 only on HP-UX.])
-      ;;
-  esac
-
-  AH_VERBATIM([__EXTENSIONS__],
-[/* Enable extensions on AIX 3, Interix.  */
-#ifndef _ALL_SOURCE
-# undef _ALL_SOURCE
-#endif
-/* Enable general extensions on MacOS 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 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_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/gnulib-cache.m4 b/m4/gnulib-cache.m4
deleted file mode 100644
index acc9a4c..0000000
--- a/m4/gnulib-cache.m4
+++ /dev/null
@@ -1,49 +0,0 @@
-# Copyright (C) 2002-2012 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 lib-ignore strndup
-
-# Specification in the form of a few gnulib-tool.m4 macro invocations:
-gl_LOCAL_DIR([])
-gl_MODULES([
-  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_DOMAIN([])
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
deleted file mode 100644
index d62b767..0000000
--- a/m4/gnulib-common.m4
+++ /dev/null
@@ -1,373 +0,0 @@
-# gnulib-common.m4 serial 32
-dnl Copyright (C) 2007-2012 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 MacOS 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
-
-/* 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 $CC
-# understand ISO C99 source code.
-# This is like AC_PROG_CC_C99, except that
-# - AC_PROG_CC_C99 did not exist in Autoconf versions < 2.60,
-# - AC_PROG_CC_C99 does not mix well with AC_PROG_CC_STDC
-#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00367.html>,
-#   but many more packages use AC_PROG_CC_STDC than AC_PROG_CC_C99
-#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00441.html>.
-# Remaining problems:
-# - When AC_PROG_CC_STDC is invoked twice, it adds the C99 enabling options
-#   to CC twice
-#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00431.html>.
-# - AC_PROG_CC_STDC is likely to change now that C11 is an ISO standard.
-AC_DEFUN([gl_PROG_CC_C99],
-[
-  dnl Change that version number to the minimum Autoconf version that supports
-  dnl mixing AC_PROG_CC_C99 calls with AC_PROG_CC_STDC calls.
-  m4_version_prereq([9.0],
-    [AC_REQUIRE([AC_PROG_CC_C99])],
-    [AC_REQUIRE([AC_PROG_CC_STDC])])
-])
-
-# gl_PROG_AR_RANLIB
-# Determines the values for AR, ARFLAGS, RANLIB that fit with the compiler.
-# The user can set the variables AR, ARFLAGS, RANLIB if he wants to override
-# the values.
-AC_DEFUN([gl_PROG_AR_RANLIB],
-[
-  dnl Minix 3 comes with two toolchains: The Amsterdam Compiler Kit compiler
-  dnl as "cc", and GCC as "gcc". They have different object file formats and
-  dnl library formats. In particular, the GNU binutils programs ar, ranlib
-  dnl produce libraries that work only with gcc, not with cc.
-  AC_REQUIRE([AC_PROG_CC])
-  AC_CACHE_CHECK([for Minix Amsterdam compiler], [gl_cv_c_amsterdam_compiler],
-    [
-      AC_EGREP_CPP([Amsterdam],
-        [
-#ifdef __ACK__
-Amsterdam
-#endif
-        ],
-        [gl_cv_c_amsterdam_compiler=yes],
-        [gl_cv_c_amsterdam_compiler=no])
-    ])
-  if test -z "$AR"; then
-    if test $gl_cv_c_amsterdam_compiler = yes; then
-      AR='cc -c.a'
-      if test -z "$ARFLAGS"; then
-        ARFLAGS='-o'
-      fi
-    else
-      dnl Use the Automake-documented default values for AR and ARFLAGS,
-      dnl but prefer ${host}-ar over ar (useful for cross-compiling).
-      AC_CHECK_TOOL([AR], [ar], [ar])
-      if test -z "$ARFLAGS"; then
-        ARFLAGS='cru'
-      fi
-    fi
-  else
-    if test -z "$ARFLAGS"; then
-      ARFLAGS='cru'
-    fi
-  fi
-  AC_SUBST([AR])
-  AC_SUBST([ARFLAGS])
-  if test -z "$RANLIB"; then
-    if test $gl_cv_c_amsterdam_compiler = yes; then
-      RANLIB=':'
-    else
-      dnl Use the ranlib program if it is available.
-      AC_PROG_RANLIB
-    fi
-  fi
-  AC_SUBST([RANLIB])
-])
-
-# AC_PROG_MKDIR_P
-# is a backport of autoconf-2.60's AC_PROG_MKDIR_P, with a fix
-# for interoperability with automake-1.9.6 from autoconf-2.62.
-# Remove this macro when we can assume autoconf >= 2.62 or
-# autoconf >= 2.60 && automake >= 1.10.
-m4_ifdef([AC_PROG_MKDIR_P], [
-  dnl For automake-1.9.6 && autoconf < 2.62: Ensure MKDIR_P is AC_SUBSTed.
-  m4_define([AC_PROG_MKDIR_P],
-    m4_defn([AC_PROG_MKDIR_P])[
-    AC_SUBST([MKDIR_P])])], [
-  dnl For autoconf < 2.60: Backport of AC_PROG_MKDIR_P.
-  AC_DEFUN_ONCE([AC_PROG_MKDIR_P],
-    [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake
-     MKDIR_P='$(mkdir_p)'
-     AC_SUBST([MKDIR_P])])])
-
-# AC_C_RESTRICT
-# This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61,
-# so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++
-# works.
-# This definition can be removed once autoconf >= 2.62 can be assumed.
-m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.62]),[-1],[
-AC_DEFUN([AC_C_RESTRICT],
-[AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
-  [ac_cv_c_restrict=no
-   # The order here caters to the fact that C++ does not require restrict.
-   for ac_kw in __restrict __restrict__ _Restrict restrict; do
-     AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-      [[typedef int * int_ptr;
-        int foo (int_ptr $ac_kw ip) {
-        return ip[0];
-       }]],
-      [[int s[1];
-        int * $ac_kw t = s;
-        t[0] = 0;
-        return foo(t)]])],
-      [ac_cv_c_restrict=$ac_kw])
-     test "$ac_cv_c_restrict" != no && break
-   done
-  ])
- AH_VERBATIM([restrict],
-[/* Define to the equivalent of the C99 'restrict' keyword, or to
-   nothing if this is not supported.  Do not define if restrict is
-   supported directly.  */
-#undef restrict
-/* Work around a bug in Sun C++: it does not support _Restrict, even
-   though the corresponding Sun C compiler does, which causes
-   "#define restrict _Restrict" in the previous line.  Perhaps some future
-   version of Sun C++ will work with _Restrict; if so, it'll probably
-   define __RESTRICT, just as Sun C does.  */
-#if defined __SUNPRO_CC && !defined __RESTRICT
-# define _Restrict
-#endif])
- case $ac_cv_c_restrict in
-   restrict) ;;
-   no) AC_DEFINE([restrict], []) ;;
-   *)  AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
- esac
-])
-])
-
-# gl_BIGENDIAN
-# is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd.
-# Note that AC_REQUIRE([AC_C_BIGENDIAN]) does not work reliably because some
-# macros invoke AC_C_BIGENDIAN with arguments.
-AC_DEFUN([gl_BIGENDIAN],
-[
-  AC_C_BIGENDIAN
-])
-
-# gl_CACHE_VAL_SILENT(cache-id, command-to-set-it)
-# is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not
-# output a spurious "(cached)" mark in the midst of other configure output.
-# This macro should be used instead of AC_CACHE_VAL when it is not surrounded
-# by an AC_MSG_CHECKING/AC_MSG_RESULT pair.
-AC_DEFUN([gl_CACHE_VAL_SILENT],
-[
-  saved_as_echo_n="$as_echo_n"
-  as_echo_n=':'
-  AC_CACHE_VAL([$1], [$2])
-  as_echo_n="$saved_as_echo_n"
-])
diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
deleted file mode 100644
index 80d7893..0000000
--- a/m4/gnulib-comp.m4
+++ /dev/null
@@ -1,238 +0,0 @@
-# DO NOT EDIT! GENERATED AUTOMATICALLY!
-# Copyright (C) 2002-2012 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 compiled summary of the specification in
-# gnulib-cache.m4. It lists the computed macro invocations that need
-# to be invoked from configure.ac.
-# In projects that use version control, this file can be treated like
-# other built files.
-
-
-# This macro should be invoked from ./configure.ac, in the section
-# "Checks for programs", right after AC_PROG_CC, and certainly before
-# any checks for libraries, header files, types and library functions.
-AC_DEFUN([gl_EARLY],
-[
-  m4_pattern_forbid([^gl_[A-Z]])dnl the gnulib macro namespace
-  m4_pattern_allow([^gl_ES$])dnl a valid locale name
-  m4_pattern_allow([^gl_LIBOBJS$])dnl a variable
-  m4_pattern_allow([^gl_LTLIBOBJS$])dnl a variable
-  AC_REQUIRE([gl_PROG_AR_RANLIB])
-  # Code from module extensions:
-  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
-  # Code from module include_next:
-  # Code from module lib-ignore:
-  # Code from module snippet/arg-nonnull:
-  # Code from module snippet/c++defs:
-  # Code from module snippet/warn-on-use:
-  # Code from module stddef:
-  # Code from module string:
-  # Code from module strndup:
-  # Code from module strnlen:
-])
-
-# This macro should be invoked from ./configure.ac, in the section
-# "Check for header files, types and library functions".
-AC_DEFUN([gl_INIT],
-[
-  AM_CONDITIONAL([GL_COND_LIBTOOL], [true])
-  gl_cond_libtool=true
-  gl_m4_base='m4'
-  m4_pushdef([AC_LIBOBJ], m4_defn([gl_LIBOBJ]))
-  m4_pushdef([AC_REPLACE_FUNCS], m4_defn([gl_REPLACE_FUNCS]))
-  m4_pushdef([AC_LIBSOURCES], m4_defn([gl_LIBSOURCES]))
-  m4_pushdef([gl_LIBSOURCES_LIST], [])
-  m4_pushdef([gl_LIBSOURCES_DIR], [])
-  gl_COMMON
-  gl_source_base='lib'
-gl_IGNORE_UNUSED_LIBRARIES
-gl_STDDEF_H
-gl_HEADER_STRING_H
-gl_FUNC_STRNDUP
-if test $HAVE_STRNDUP = 0 || test $REPLACE_STRNDUP = 1; then
-  AC_LIBOBJ([strndup])
-fi
-gl_STRING_MODULE_INDICATOR([strndup])
-gl_FUNC_STRNLEN
-if test $HAVE_DECL_STRNLEN = 0 || test $REPLACE_STRNLEN = 1; then
-  AC_LIBOBJ([strnlen])
-  gl_PREREQ_STRNLEN
-fi
-gl_STRING_MODULE_INDICATOR([strnlen])
-  # End of code from modules
-  m4_ifval(gl_LIBSOURCES_LIST, [
-    m4_syscmd([test ! -d ]m4_defn([gl_LIBSOURCES_DIR])[ ||
-      for gl_file in ]gl_LIBSOURCES_LIST[ ; do
-        if test ! -r ]m4_defn([gl_LIBSOURCES_DIR])[/$gl_file ; then
-          echo "missing file ]m4_defn([gl_LIBSOURCES_DIR])[/$gl_file" >&2
-          exit 1
-        fi
-      done])dnl
-      m4_if(m4_sysval, [0], [],
-        [AC_FATAL([expected source file, required through AC_LIBSOURCES, not found])])
-  ])
-  m4_popdef([gl_LIBSOURCES_DIR])
-  m4_popdef([gl_LIBSOURCES_LIST])
-  m4_popdef([AC_LIBSOURCES])
-  m4_popdef([AC_REPLACE_FUNCS])
-  m4_popdef([AC_LIBOBJ])
-  AC_CONFIG_COMMANDS_PRE([
-    gl_libobjs=
-    gl_ltlibobjs=
-    if test -n "$gl_LIBOBJS"; then
-      # Remove the extension.
-      sed_drop_objext='s/\.o$//;s/\.obj$//'
-      for i in `for i in $gl_LIBOBJS; do echo "$i"; done | sed -e "$sed_drop_objext" | sort | uniq`; do
-        gl_libobjs="$gl_libobjs $i.$ac_objext"
-        gl_ltlibobjs="$gl_ltlibobjs $i.lo"
-      done
-    fi
-    AC_SUBST([gl_LIBOBJS], [$gl_libobjs])
-    AC_SUBST([gl_LTLIBOBJS], [$gl_ltlibobjs])
-  ])
-  gltests_libdeps=
-  gltests_ltlibdeps=
-  m4_pushdef([AC_LIBOBJ], m4_defn([gltests_LIBOBJ]))
-  m4_pushdef([AC_REPLACE_FUNCS], m4_defn([gltests_REPLACE_FUNCS]))
-  m4_pushdef([AC_LIBSOURCES], m4_defn([gltests_LIBSOURCES]))
-  m4_pushdef([gltests_LIBSOURCES_LIST], [])
-  m4_pushdef([gltests_LIBSOURCES_DIR], [])
-  gl_COMMON
-  gl_source_base='tests'
-changequote(,)dnl
-  gltests_WITNESS=IN_`echo "${PACKAGE-$PACKAGE_TARNAME}" | LC_ALL=C tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ | LC_ALL=C sed -e 's/[^A-Z0-9_]/_/g'`_GNULIB_TESTS
-changequote([, ])dnl
-  AC_SUBST([gltests_WITNESS])
-  gl_module_indicator_condition=$gltests_WITNESS
-  m4_pushdef([gl_MODULE_INDICATOR_CONDITION], [$gl_module_indicator_condition])
-  m4_popdef([gl_MODULE_INDICATOR_CONDITION])
-  m4_ifval(gltests_LIBSOURCES_LIST, [
-    m4_syscmd([test ! -d ]m4_defn([gltests_LIBSOURCES_DIR])[ ||
-      for gl_file in ]gltests_LIBSOURCES_LIST[ ; do
-        if test ! -r ]m4_defn([gltests_LIBSOURCES_DIR])[/$gl_file ; then
-          echo "missing file ]m4_defn([gltests_LIBSOURCES_DIR])[/$gl_file" >&2
-          exit 1
-        fi
-      done])dnl
-      m4_if(m4_sysval, [0], [],
-        [AC_FATAL([expected source file, required through AC_LIBSOURCES, not found])])
-  ])
-  m4_popdef([gltests_LIBSOURCES_DIR])
-  m4_popdef([gltests_LIBSOURCES_LIST])
-  m4_popdef([AC_LIBSOURCES])
-  m4_popdef([AC_REPLACE_FUNCS])
-  m4_popdef([AC_LIBOBJ])
-  AC_CONFIG_COMMANDS_PRE([
-    gltests_libobjs=
-    gltests_ltlibobjs=
-    if test -n "$gltests_LIBOBJS"; then
-      # Remove the extension.
-      sed_drop_objext='s/\.o$//;s/\.obj$//'
-      for i in `for i in $gltests_LIBOBJS; do echo "$i"; done | sed -e "$sed_drop_objext" | sort | uniq`; do
-        gltests_libobjs="$gltests_libobjs $i.$ac_objext"
-        gltests_ltlibobjs="$gltests_ltlibobjs $i.lo"
-      done
-    fi
-    AC_SUBST([gltests_LIBOBJS], [$gltests_libobjs])
-    AC_SUBST([gltests_LTLIBOBJS], [$gltests_ltlibobjs])
-  ])
-])
-
-# Like AC_LIBOBJ, except that the module name goes
-# into gl_LIBOBJS instead of into LIBOBJS.
-AC_DEFUN([gl_LIBOBJ], [
-  AS_LITERAL_IF([$1], [gl_LIBSOURCES([$1.c])])dnl
-  gl_LIBOBJS="$gl_LIBOBJS $1.$ac_objext"
-])
-
-# Like AC_REPLACE_FUNCS, except that the module name goes
-# into gl_LIBOBJS instead of into LIBOBJS.
-AC_DEFUN([gl_REPLACE_FUNCS], [
-  m4_foreach_w([gl_NAME], [$1], [AC_LIBSOURCES(gl_NAME[.c])])dnl
-  AC_CHECK_FUNCS([$1], , [gl_LIBOBJ($ac_func)])
-])
-
-# Like AC_LIBSOURCES, except the directory where the source file is
-# expected is derived from the gnulib-tool parameterization,
-# and alloca is special cased (for the alloca-opt module).
-# We could also entirely rely on EXTRA_lib..._SOURCES.
-AC_DEFUN([gl_LIBSOURCES], [
-  m4_foreach([_gl_NAME], [$1], [
-    m4_if(_gl_NAME, [alloca.c], [], [
-      m4_define([gl_LIBSOURCES_DIR], [lib])
-      m4_append([gl_LIBSOURCES_LIST], _gl_NAME, [ ])
-    ])
-  ])
-])
-
-# Like AC_LIBOBJ, except that the module name goes
-# into gltests_LIBOBJS instead of into LIBOBJS.
-AC_DEFUN([gltests_LIBOBJ], [
-  AS_LITERAL_IF([$1], [gltests_LIBSOURCES([$1.c])])dnl
-  gltests_LIBOBJS="$gltests_LIBOBJS $1.$ac_objext"
-])
-
-# Like AC_REPLACE_FUNCS, except that the module name goes
-# into gltests_LIBOBJS instead of into LIBOBJS.
-AC_DEFUN([gltests_REPLACE_FUNCS], [
-  m4_foreach_w([gl_NAME], [$1], [AC_LIBSOURCES(gl_NAME[.c])])dnl
-  AC_CHECK_FUNCS([$1], , [gltests_LIBOBJ($ac_func)])
-])
-
-# Like AC_LIBSOURCES, except the directory where the source file is
-# expected is derived from the gnulib-tool parameterization,
-# and alloca is special cased (for the alloca-opt module).
-# We could also entirely rely on EXTRA_lib..._SOURCES.
-AC_DEFUN([gltests_LIBSOURCES], [
-  m4_foreach([_gl_NAME], [$1], [
-    m4_if(_gl_NAME, [alloca.c], [], [
-      m4_define([gltests_LIBSOURCES_DIR], [tests])
-      m4_append([gltests_LIBSOURCES_LIST], _gl_NAME, [ ])
-    ])
-  ])
-])
-
-# This macro records the list of files which have been installed by
-# gnulib-tool and may be removed by future gnulib-tool invocations.
-AC_DEFUN([gl_FILE_LIST], [
-  build-aux/snippet/arg-nonnull.h
-  build-aux/snippet/c++defs.h
-  build-aux/snippet/warn-on-use.h
-  lib/dummy.c
-  lib/stddef.in.h
-  lib/string.in.h
-  lib/strndup.c
-  lib/strnlen.c
-  m4/00gnulib.m4
-  m4/extensions.m4
-  m4/gnulib-common.m4
-  m4/include_next.m4
-  m4/lib-ignore.m4
-  m4/onceonly.m4
-  m4/stddef_h.m4
-  m4/string_h.m4
-  m4/strndup.m4
-  m4/strnlen.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 a09ffc1..0000000
--- a/m4/gnulib-tool.m4
+++ /dev/null
@@ -1,57 +0,0 @@
-# gnulib-tool.m4 serial 2
-dnl Copyright (C) 2004-2005, 2009-2012 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 a60a261..0000000
--- a/m4/include_next.m4
+++ /dev/null
@@ -1,270 +0,0 @@
-# include_next.m4 serial 23
-dnl Copyright (C) 2006-2012 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([$2], [check],
-            [AS_VAR_PUSHDEF([gl_header_exists],
-                            [ac_cv_header_]m4_defn([gl_HEADER_NAME]))
-             if test AS_VAR_GET(gl_header_exists) = yes; then
-             AS_VAR_POPDEF([gl_header_exists])
-            ])
-               AC_LANG_CONFTEST(
-                 [AC_LANG_SOURCE(
-                    [[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]]
-                  )])
-               dnl AIX "xlc -E" and "cc -E" omit #line directives for header
-               dnl files that contain only a #include of other header files and
-               dnl no non-comment tokens of their own. This leads to a failure
-               dnl to detect the absolute name of <dirent.h>, <signal.h>,
-               dnl <poll.h> and others. The workaround is to force preservation
-               dnl of comments through option -C. This ensures all necessary
-               dnl #line directives are present. GCC supports option -C as well.
-               case "$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'
-changequote([,])
-               gl_header_literal_regex=`echo ']m4_defn([gl_HEADER_NAME])[' \
-                                        | 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/
-changequote(,)dnl
-                   s|^/[^/]|//&|
-changequote([,])dnl
-                   p
-                   q
-                 }'
-               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_next_header,
-                 ['"'`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
-                      sed -n "$gl_absolute_header_sed"`'"'])
-          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/lib-ignore.m4 b/m4/lib-ignore.m4
deleted file mode 100644
index 292c469..0000000
--- a/m4/lib-ignore.m4
+++ /dev/null
@@ -1,115 +0,0 @@
-# If possible, ignore libraries that are not depended on.
-
-dnl Copyright (C) 2006, 2009-2012 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/onceonly.m4 b/m4/onceonly.m4
deleted file mode 100644
index 275d73c..0000000
--- a/m4/onceonly.m4
+++ /dev/null
@@ -1,104 +0,0 @@
-# onceonly.m4 serial 9
-dnl Copyright (C) 2002-2003, 2005-2006, 2008-2012 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/stddef_h.m4 b/m4/stddef_h.m4
deleted file mode 100644
index cc11609..0000000
--- 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) 2009-2012 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/string_h.m4 b/m4/string_h.m4
deleted file mode 100644
index 5677e09..0000000
--- a/m4/string_h.m4
+++ /dev/null
@@ -1,120 +0,0 @@
-# Configure a GNU-like replacement for <string.h>.
-
-# Copyright (C) 2007-2012 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 bdde5fe..0000000
--- a/m4/strndup.m4
+++ /dev/null
@@ -1,55 +0,0 @@
-# strndup.m4 serial 20
-dnl Copyright (C) 2002-2003, 2005-2012 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>]], [[
-#ifndef 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 d97e307..0000000
--- a/m4/strnlen.m4
+++ /dev/null
@@ -1,30 +0,0 @@
-# strnlen.m4 serial 13
-dnl Copyright (C) 2002-2003, 2005-2007, 2009-2012 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/warn-on-use.m4 b/m4/warn-on-use.m4
deleted file mode 100644
index a77802e..0000000
--- a/m4/warn-on-use.m4
+++ /dev/null
@@ -1,47 +0,0 @@
-# warn-on-use.m4 serial 5
-dnl Copyright (C) 2010-2012 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 534735d..0000000
--- 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, 2008-2012 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
-])