diff --git a/m4/ax_boost_base.m4 b/m4/ax_boost_base.m4
deleted file mode 100644
index 2bce519..0000000
--- a/m4/ax_boost_base.m4
+++ /dev/null
@@ -1,301 +0,0 @@
-# ===========================================================================
-#      https://www.gnu.org/software/autoconf-archive/ax_boost_base.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_BOOST_BASE([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
-#
-# DESCRIPTION
-#
-#   Test for the Boost C++ libraries of a particular version (or newer)
-#
-#   If no path to the installed boost library is given the macro searchs
-#   under /usr, /usr/local, /opt and /opt/local and evaluates the
-#   $BOOST_ROOT environment variable. Further documentation is available at
-#   <http://randspringer.de/boost/index.html>.
-#
-#   This macro calls:
-#
-#     AC_SUBST(BOOST_CPPFLAGS) / AC_SUBST(BOOST_LDFLAGS)
-#
-#   And sets:
-#
-#     HAVE_BOOST
-#
-# LICENSE
-#
-#   Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de>
-#   Copyright (c) 2009 Peter Adolphs
-#
-#   Copying and distribution of this file, with or without modification, are
-#   permitted in any medium without royalty provided the copyright notice
-#   and this notice are preserved. This file is offered as-is, without any
-#   warranty.
-
-#serial 43
-
-# example boost program (need to pass version)
-m4_define([_AX_BOOST_BASE_PROGRAM],
-          [AC_LANG_PROGRAM([[
-#include <boost/version.hpp>
-]],[[
-(void) ((void)sizeof(char[1 - 2*!!((BOOST_VERSION) < ($1))]));
-]])])
-
-AC_DEFUN([AX_BOOST_BASE],
-[
-AC_ARG_WITH([boost],
-  [AS_HELP_STRING([--with-boost@<:@=ARG@:>@],
-    [use Boost library from a standard location (ARG=yes),
-     from the specified location (ARG=<path>),
-     or disable it (ARG=no)
-     @<:@ARG=yes@:>@ ])],
-    [
-     AS_CASE([$withval],
-       [no],[want_boost="no";_AX_BOOST_BASE_boost_path=""],
-       [yes],[want_boost="yes";_AX_BOOST_BASE_boost_path=""],
-       [want_boost="yes";_AX_BOOST_BASE_boost_path="$withval"])
-    ],
-    [want_boost="yes"])
-
-
-AC_ARG_WITH([boost-libdir],
-  [AS_HELP_STRING([--with-boost-libdir=LIB_DIR],
-    [Force given directory for boost libraries.
-     Note that this will override library path detection,
-     so use this parameter only if default library detection fails
-     and you know exactly where your boost libraries are located.])],
-  [
-   AS_IF([test -d "$withval"],
-         [_AX_BOOST_BASE_boost_lib_path="$withval"],
-    [AC_MSG_ERROR([--with-boost-libdir expected directory name])])
-  ],
-  [_AX_BOOST_BASE_boost_lib_path=""])
-
-BOOST_LDFLAGS=""
-BOOST_CPPFLAGS=""
-AS_IF([test "x$want_boost" = "xyes"],
-      [_AX_BOOST_BASE_RUNDETECT([$1],[$2],[$3])])
-AC_SUBST(BOOST_CPPFLAGS)
-AC_SUBST(BOOST_LDFLAGS)
-])
-
-
-# convert a version string in $2 to numeric and affect to polymorphic var $1
-AC_DEFUN([_AX_BOOST_BASE_TONUMERICVERSION],[
-  AS_IF([test "x$2" = "x"],[_AX_BOOST_BASE_TONUMERICVERSION_req="1.20.0"],[_AX_BOOST_BASE_TONUMERICVERSION_req="$2"])
-  _AX_BOOST_BASE_TONUMERICVERSION_req_shorten=`expr $_AX_BOOST_BASE_TONUMERICVERSION_req : '\([[0-9]]*\.[[0-9]]*\)'`
-  _AX_BOOST_BASE_TONUMERICVERSION_req_major=`expr $_AX_BOOST_BASE_TONUMERICVERSION_req : '\([[0-9]]*\)'`
-  AS_IF([test "x$_AX_BOOST_BASE_TONUMERICVERSION_req_major" = "x"],
-        [AC_MSG_ERROR([You should at least specify libboost major version])])
-  _AX_BOOST_BASE_TONUMERICVERSION_req_minor=`expr $_AX_BOOST_BASE_TONUMERICVERSION_req : '[[0-9]]*\.\([[0-9]]*\)'`
-  AS_IF([test "x$_AX_BOOST_BASE_TONUMERICVERSION_req_minor" = "x"],
-        [_AX_BOOST_BASE_TONUMERICVERSION_req_minor="0"])
-  _AX_BOOST_BASE_TONUMERICVERSION_req_sub_minor=`expr $_AX_BOOST_BASE_TONUMERICVERSION_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
-  AS_IF([test "X$_AX_BOOST_BASE_TONUMERICVERSION_req_sub_minor" = "X"],
-        [_AX_BOOST_BASE_TONUMERICVERSION_req_sub_minor="0"])
-  _AX_BOOST_BASE_TONUMERICVERSION_RET=`expr $_AX_BOOST_BASE_TONUMERICVERSION_req_major \* 100000 \+  $_AX_BOOST_BASE_TONUMERICVERSION_req_minor \* 100 \+ $_AX_BOOST_BASE_TONUMERICVERSION_req_sub_minor`
-  AS_VAR_SET($1,$_AX_BOOST_BASE_TONUMERICVERSION_RET)
-])
-
-dnl Run the detection of boost should be run only if $want_boost
-AC_DEFUN([_AX_BOOST_BASE_RUNDETECT],[
-    _AX_BOOST_BASE_TONUMERICVERSION(WANT_BOOST_VERSION,[$1])
-    succeeded=no
-
-
-    AC_REQUIRE([AC_CANONICAL_HOST])
-    dnl On 64-bit systems check for system libraries in both lib64 and lib.
-    dnl The former is specified by FHS, but e.g. Debian does not adhere to
-    dnl this (as it rises problems for generic multi-arch support).
-    dnl The last entry in the list is chosen by default when no libraries
-    dnl are found, e.g. when only header-only libraries are installed!
-    AS_CASE([${host_cpu}],
-      [x86_64],[libsubdirs="lib64 libx32 lib lib64"],
-      [ppc64|s390x|sparc64|aarch64|ppc64le],[libsubdirs="lib64 lib lib64"],
-      [libsubdirs="lib"]
-    )
-
-    dnl allow for real multi-arch paths e.g. /usr/lib/x86_64-linux-gnu. Give
-    dnl them priority over the other paths since, if libs are found there, they
-    dnl are almost assuredly the ones desired.
-    AS_CASE([${host_cpu}],
-      [i?86],[multiarch_libsubdir="lib/i386-${host_os}"],
-      [multiarch_libsubdir="lib/${host_cpu}-${host_os}"]
-    )
-
-    dnl first we check the system location for boost libraries
-    dnl this location ist chosen if boost libraries are installed with the --layout=system option
-    dnl or if you install boost with RPM
-    AS_IF([test "x$_AX_BOOST_BASE_boost_path" != "x"],[
-        AC_MSG_CHECKING([for boostlib >= $1 ($WANT_BOOST_VERSION) includes in "$_AX_BOOST_BASE_boost_path/include"])
-         AS_IF([test -d "$_AX_BOOST_BASE_boost_path/include" && test -r "$_AX_BOOST_BASE_boost_path/include"],[
-           AC_MSG_RESULT([yes])
-           BOOST_CPPFLAGS="-I$_AX_BOOST_BASE_boost_path/include"
-           for _AX_BOOST_BASE_boost_path_tmp in $multiarch_libsubdir $libsubdirs; do
-                AC_MSG_CHECKING([for boostlib >= $1 ($WANT_BOOST_VERSION) lib path in "$_AX_BOOST_BASE_boost_path/$_AX_BOOST_BASE_boost_path_tmp"])
-                AS_IF([test -d "$_AX_BOOST_BASE_boost_path/$_AX_BOOST_BASE_boost_path_tmp" && test -r "$_AX_BOOST_BASE_boost_path/$_AX_BOOST_BASE_boost_path_tmp" ],[
-                        AC_MSG_RESULT([yes])
-                        BOOST_LDFLAGS="-L$_AX_BOOST_BASE_boost_path/$_AX_BOOST_BASE_boost_path_tmp";
-                        break;
-                ],
-      [AC_MSG_RESULT([no])])
-           done],[
-      AC_MSG_RESULT([no])])
-    ],[
-        if test X"$cross_compiling" = Xyes; then
-            search_libsubdirs=$multiarch_libsubdir
-        else
-            search_libsubdirs="$multiarch_libsubdir $libsubdirs"
-        fi
-        for _AX_BOOST_BASE_boost_path_tmp in /usr /usr/local /opt /opt/local ; do
-            if test -d "$_AX_BOOST_BASE_boost_path_tmp/include/boost" && test -r "$_AX_BOOST_BASE_boost_path_tmp/include/boost" ; then
-                for libsubdir in $search_libsubdirs ; do
-                    if ls "$_AX_BOOST_BASE_boost_path_tmp/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi
-                done
-                BOOST_LDFLAGS="-L$_AX_BOOST_BASE_boost_path_tmp/$libsubdir"
-                BOOST_CPPFLAGS="-I$_AX_BOOST_BASE_boost_path_tmp/include"
-                break;
-            fi
-        done
-    ])
-
-    dnl overwrite ld flags if we have required special directory with
-    dnl --with-boost-libdir parameter
-    AS_IF([test "x$_AX_BOOST_BASE_boost_lib_path" != "x"],
-          [BOOST_LDFLAGS="-L$_AX_BOOST_BASE_boost_lib_path"])
-
-    AC_MSG_CHECKING([for boostlib >= $1 ($WANT_BOOST_VERSION)])
-    CPPFLAGS_SAVED="$CPPFLAGS"
-    CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-    export CPPFLAGS
-
-    LDFLAGS_SAVED="$LDFLAGS"
-    LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
-    export LDFLAGS
-
-    AC_REQUIRE([AC_PROG_CXX])
-    AC_LANG_PUSH(C++)
-        AC_COMPILE_IFELSE([_AX_BOOST_BASE_PROGRAM($WANT_BOOST_VERSION)],[
-        AC_MSG_RESULT(yes)
-    succeeded=yes
-    found_system=yes
-        ],[
-        ])
-    AC_LANG_POP([C++])
-
-
-
-    dnl if we found no boost with system layout we search for boost libraries
-    dnl built and installed without the --layout=system option or for a staged(not installed) version
-    if test "x$succeeded" != "xyes" ; then
-        CPPFLAGS="$CPPFLAGS_SAVED"
-        LDFLAGS="$LDFLAGS_SAVED"
-        BOOST_CPPFLAGS=
-        if test -z "$_AX_BOOST_BASE_boost_lib_path" ; then
-            BOOST_LDFLAGS=
-        fi
-        _version=0
-        if test -n "$_AX_BOOST_BASE_boost_path" ; then
-            if test -d "$_AX_BOOST_BASE_boost_path" && test -r "$_AX_BOOST_BASE_boost_path"; then
-                for i in `ls -d $_AX_BOOST_BASE_boost_path/include/boost-* 2>/dev/null`; do
-                    _version_tmp=`echo $i | sed "s#$_AX_BOOST_BASE_boost_path##" | sed 's/\/include\/boost-//' | sed 's/_/./'`
-                    V_CHECK=`expr $_version_tmp \> $_version`
-                    if test "x$V_CHECK" = "x1" ; then
-                        _version=$_version_tmp
-                    fi
-                    VERSION_UNDERSCORE=`echo $_version | sed 's/\./_/'`
-                    BOOST_CPPFLAGS="-I$_AX_BOOST_BASE_boost_path/include/boost-$VERSION_UNDERSCORE"
-                done
-                dnl if nothing found search for layout used in Windows distributions
-                if test -z "$BOOST_CPPFLAGS"; then
-                    if test -d "$_AX_BOOST_BASE_boost_path/boost" && test -r "$_AX_BOOST_BASE_boost_path/boost"; then
-                        BOOST_CPPFLAGS="-I$_AX_BOOST_BASE_boost_path"
-                    fi
-                fi
-                dnl if we found something and BOOST_LDFLAGS was unset before
-                dnl (because "$_AX_BOOST_BASE_boost_lib_path" = ""), set it here.
-                if test -n "$BOOST_CPPFLAGS" && test -z "$BOOST_LDFLAGS"; then
-                    for libsubdir in $libsubdirs ; do
-                        if ls "$_AX_BOOST_BASE_boost_path/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi
-                    done
-                    BOOST_LDFLAGS="-L$_AX_BOOST_BASE_boost_path/$libsubdir"
-                fi
-            fi
-        else
-            if test "x$cross_compiling" != "xyes" ; then
-                for _AX_BOOST_BASE_boost_path in /usr /usr/local /opt /opt/local ; do
-                    if test -d "$_AX_BOOST_BASE_boost_path" && test -r "$_AX_BOOST_BASE_boost_path" ; then
-                        for i in `ls -d $_AX_BOOST_BASE_boost_path/include/boost-* 2>/dev/null`; do
-                            _version_tmp=`echo $i | sed "s#$_AX_BOOST_BASE_boost_path##" | sed 's/\/include\/boost-//' | sed 's/_/./'`
-                            V_CHECK=`expr $_version_tmp \> $_version`
-                            if test "x$V_CHECK" = "x1" ; then
-                                _version=$_version_tmp
-                                best_path=$_AX_BOOST_BASE_boost_path
-                            fi
-                        done
-                    fi
-                done
-
-                VERSION_UNDERSCORE=`echo $_version | sed 's/\./_/'`
-                BOOST_CPPFLAGS="-I$best_path/include/boost-$VERSION_UNDERSCORE"
-                if test -z "$_AX_BOOST_BASE_boost_lib_path" ; then
-                    for libsubdir in $libsubdirs ; do
-                        if ls "$best_path/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi
-                    done
-                    BOOST_LDFLAGS="-L$best_path/$libsubdir"
-                fi
-            fi
-
-            if test -n "$BOOST_ROOT" ; then
-                for libsubdir in $libsubdirs ; do
-                    if ls "$BOOST_ROOT/stage/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi
-                done
-                if test -d "$BOOST_ROOT" && test -r "$BOOST_ROOT" && test -d "$BOOST_ROOT/stage/$libsubdir" && test -r "$BOOST_ROOT/stage/$libsubdir"; then
-                    version_dir=`expr //$BOOST_ROOT : '.*/\(.*\)'`
-                    stage_version=`echo $version_dir | sed 's/boost_//' | sed 's/_/./g'`
-                        stage_version_shorten=`expr $stage_version : '\([[0-9]]*\.[[0-9]]*\)'`
-                    V_CHECK=`expr $stage_version_shorten \>\= $_version`
-                    if test "x$V_CHECK" = "x1" && test -z "$_AX_BOOST_BASE_boost_lib_path" ; then
-                        AC_MSG_NOTICE(We will use a staged boost library from $BOOST_ROOT)
-                        BOOST_CPPFLAGS="-I$BOOST_ROOT"
-                        BOOST_LDFLAGS="-L$BOOST_ROOT/stage/$libsubdir"
-                    fi
-                fi
-            fi
-        fi
-
-        CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-        export CPPFLAGS
-        LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
-        export LDFLAGS
-
-        AC_LANG_PUSH(C++)
-            AC_COMPILE_IFELSE([_AX_BOOST_BASE_PROGRAM($WANT_BOOST_VERSION)],[
-            AC_MSG_RESULT(yes)
-        succeeded=yes
-        found_system=yes
-            ],[
-            ])
-        AC_LANG_POP([C++])
-    fi
-
-    if test "x$succeeded" != "xyes" ; then
-        if test "x$_version" = "x0" ; then
-            AC_MSG_NOTICE([[We could not detect the boost libraries (version $1 or higher). If you have a staged boost library (still not installed) please specify \$BOOST_ROOT in your environment and do not give a PATH to --with-boost option.  If you are sure you have boost installed, then check your version number looking in <boost/version.hpp>. See http://randspringer.de/boost for more documentation.]])
-        else
-            AC_MSG_NOTICE([Your boost libraries seems to old (version $_version).])
-        fi
-        # execute ACTION-IF-NOT-FOUND (if present):
-        ifelse([$3], , :, [$3])
-    else
-        AC_DEFINE(HAVE_BOOST,,[define if the Boost library is available])
-        # execute ACTION-IF-FOUND (if present):
-        ifelse([$2], , :, [$2])
-    fi
-
-    CPPFLAGS="$CPPFLAGS_SAVED"
-    LDFLAGS="$LDFLAGS_SAVED"
-
-])
diff --git a/m4/ax_boost_python.m4 b/m4/ax_boost_python.m4
deleted file mode 100644
index 41826be..0000000
--- a/m4/ax_boost_python.m4
+++ /dev/null
@@ -1,121 +0,0 @@
-# ===========================================================================
-#     https://www.gnu.org/software/autoconf-archive/ax_boost_python.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_BOOST_PYTHON
-#
-# DESCRIPTION
-#
-#   This macro checks to see if the Boost.Python library is installed. It
-#   also attempts to guess the correct library name using several attempts.
-#   It tries to build the library name using a user supplied name or suffix
-#   and then just the raw library.
-#
-#   If the library is found, HAVE_BOOST_PYTHON is defined and
-#   BOOST_PYTHON_LIB is set to the name of the library.
-#
-#   This macro calls AC_SUBST(BOOST_PYTHON_LIB).
-#
-#   In order to ensure that the Python headers and the Boost libraries are
-#   specified on the include path, this macro requires AX_PYTHON_DEVEL and
-#   AX_BOOST_BASE to be called.
-#
-# LICENSE
-#
-#   Copyright (c) 2008 Michael Tindal
-#   Copyright (c) 2013 Daniel M"ullner <daniel@danifold.net>
-#
-#   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 2 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 <https://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 22
-
-AC_DEFUN([AX_BOOST_PYTHON],
-[AC_REQUIRE([AX_PYTHON_DEVEL])dnl
-AC_REQUIRE([AX_BOOST_BASE])dnl
-AC_LANG_PUSH([C++])
-ax_boost_python_save_CPPFLAGS="$CPPFLAGS"
-ax_boost_python_save_LDFLAGS="$LDFLAGS"
-ax_boost_python_save_LIBS="$LIBS"
-if test "x$PYTHON_CPPFLAGS" != "x"; then
-  CPPFLAGS="$PYTHON_CPPFLAGS $CPPFLAGS"
-fi
-
-# Versions of AX_PYTHON_DEVEL() before serial 18 provided PYTHON_LDFLAGS
-# instead of PYTHON_LIBS, so this is just here for compatibility.
-if test "x$PYTHON_LDFLAGS" != "x"; then
-  LDFLAGS="$PYTHON_LDFLAGS $LDFLAGS"
-fi
-
-# Note: Only versions of AX_PYTHON_DEVEL() since serial 18 provide PYTHON_LIBS
-# instead of PYTHON_LDFLAGS.
-if test "x$PYTHON_LIBS" != "x"; then
-  LIBS="$PYTHON_LIBS $LIBS"
-fi
-
-if test "x$BOOST_CPPFLAGS" != "x"; then
-  CPPFLAGS="$BOOST_CPPFLAGS $CPPFLAGS"
-fi
-if test "x$BOOST_LDFLAGS" != "x"; then
-  LDFLAGS="$BOOST_LDFLAGS $LDFLAGS"
-fi
-AC_CACHE_CHECK(whether the Boost::Python library is available,
-ac_cv_boost_python,
-[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
-#include <boost/python/module.hpp>
-BOOST_PYTHON_MODULE(test) { throw "Boost::Python test."; }]], [])],
-    ac_cv_boost_python=yes, ac_cv_boost_python=no)
-])
-if test "$ac_cv_boost_python" = "yes"; then
-  AC_DEFINE(HAVE_BOOST_PYTHON,,[define if the Boost::Python library is available])
-  ax_python_lib=boost_python
-  AC_ARG_WITH([boost-python],AS_HELP_STRING([--with-boost-python],[specify yes/no or the boost python library or suffix to use]),
-  [if test "x$with_boost_python" != "xno" -a "x$with_boost_python" != "xyes"; then
-     ax_python_lib=$with_boost_python
-     ax_boost_python_lib=boost_python-$with_boost_python
-   fi])
-  BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
-  for ax_lib in $ax_python_lib $ax_boost_python_lib `ls $BOOSTLIBDIR/libboost_python*.so* $BOOSTLIBDIR/libboost_python*.dylib* $BOOSTLIBDIR/libboost_python*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_python.*\)\.so.*$;\1;' -e 's;^lib\(boost_python.*\)\.dylib.*$;\1;' -e 's;^lib\(boost_python.*\)\.a.*$;\1;' ` boost_python boost_python3; do
-    AS_VAR_PUSHDEF([ax_Lib], [ax_cv_lib_$ax_lib''_BOOST_PYTHON_MODULE])dnl
-    AC_CACHE_CHECK([whether $ax_lib is the correct library], [ax_Lib],
-    [LIBS="-l$ax_lib $ax_boost_python_save_LIBS $PYTHON_LIBS"
-    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
-#include <boost/python/module.hpp>
-BOOST_PYTHON_MODULE(test) { throw "Boost::Python test."; }]], [])],
-        [AS_VAR_SET([ax_Lib], [yes])],
-        [AS_VAR_SET([ax_Lib], [no])])])
-    AS_VAR_IF([ax_Lib], [yes], [BOOST_PYTHON_LIB=$ax_lib break], [])
-    AS_VAR_POPDEF([ax_Lib])dnl
-  done
-  AC_SUBST(BOOST_PYTHON_LIB)
-fi
-CPPFLAGS="$ax_boost_python_save_CPPFLAGS"
-LDFLAGS="$ax_boost_python_save_LDFLAGS"
-LIBS="$ax_boost_python_save_LIBS"
-AC_LANG_POP([C++])
-])dnl
diff --git a/m4/ax_python.m4 b/m4/ax_python.m4
deleted file mode 100644
index 1b4bb2b..0000000
--- a/m4/ax_python.m4
+++ /dev/null
@@ -1,97 +0,0 @@
-# ===========================================================================
-#        https://www.gnu.org/software/autoconf-archive/ax_python.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_PYTHON
-#
-# DESCRIPTION
-#
-#   This macro does a complete Python development environment check.
-#
-#   It checks for all known versions. When it finds an executable, it looks
-#   to find the header files and library.
-#
-#   It sets PYTHON_BIN to the name of the python executable,
-#   PYTHON_INCLUDE_DIR to the directory holding the header files, and
-#   PYTHON_LIB to the name of the Python library.
-#
-#   This macro calls AC_SUBST on PYTHON_BIN (via AC_CHECK_PROG),
-#   PYTHON_INCLUDE_DIR and PYTHON_LIB.
-#
-# LICENSE
-#
-#   Copyright (c) 2008 Michael Tindal
-#
-#   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 2 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 <https://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 18
-
-AC_DEFUN([AX_PYTHON],
-[AC_MSG_CHECKING(for python build information)
-AC_MSG_RESULT([])
-for python in python3.9 python3.8 python3.7 python3.6 python3.5 python3.3 python3.2 python3.1 python3.0 python2.7 python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python; do
-AC_CHECK_PROGS(PYTHON_BIN, [$python])
-ax_python_bin=$PYTHON_BIN
-if test x$ax_python_bin != x; then
-   AC_CHECK_LIB($ax_python_bin, main, ax_python_lib=$ax_python_bin, ax_python_lib=no)
-   if test x$ax_python_lib == xno; then
-     AC_CHECK_LIB(${ax_python_bin}m, main, ax_python_lib=${ax_python_bin}m, ax_python_lib=no)
-   fi
-   if test x$ax_python_lib != xno; then
-     ax_python_header=`$ax_python_bin -c "from distutils.sysconfig import *; print(get_config_var('CONFINCLUDEPY'))"`
-     if test x$ax_python_header != x; then
-       break;
-     fi
-   fi
-fi
-done
-if test x$ax_python_bin = x; then
-   ax_python_bin=no
-fi
-if test x$ax_python_header = x; then
-   ax_python_header=no
-fi
-if test x$ax_python_lib = x; then
-   ax_python_lib=no
-fi
-
-AC_MSG_RESULT([  results of the Python check:])
-AC_MSG_RESULT([    Binary:      $ax_python_bin])
-AC_MSG_RESULT([    Library:     $ax_python_lib])
-AC_MSG_RESULT([    Include Dir: $ax_python_header])
-
-if test x$ax_python_header != xno; then
-  PYTHON_INCLUDE_DIR=$ax_python_header
-  AC_SUBST(PYTHON_INCLUDE_DIR)
-fi
-if test x$ax_python_lib != xno; then
-  PYTHON_LIB=$ax_python_lib
-  AC_SUBST(PYTHON_LIB)
-fi
-])dnl
diff --git a/m4/ax_python_devel.m4 b/m4/ax_python_devel.m4
deleted file mode 100644
index 3bd36d8..0000000
--- a/m4/ax_python_devel.m4
+++ /dev/null
@@ -1,327 +0,0 @@
-# ===========================================================================
-#     https://www.gnu.org/software/autoconf-archive/ax_python_devel.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_PYTHON_DEVEL([version])
-#
-# DESCRIPTION
-#
-#   Note: Defines as a precious variable "PYTHON_VERSION". Don't override it
-#   in your configure.ac.
-#
-#   This macro checks for Python and tries to get the include path to
-#   'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LIBS) output
-#   variables. It also exports $(PYTHON_EXTRA_LIBS) and
-#   $(PYTHON_EXTRA_LDFLAGS) for embedding Python in your code.
-#
-#   You can search for some particular version of Python by passing a
-#   parameter to this macro, for example ">= '2.3.1'", or "== '2.4'". Please
-#   note that you *have* to pass also an operator along with the version to
-#   match, and pay special attention to the single quotes surrounding the
-#   version number. Don't use "PYTHON_VERSION" for this: that environment
-#   variable is declared as precious and thus reserved for the end-user.
-#
-#   This macro should work for all versions of Python >= 2.1.0. As an end
-#   user, you can disable the check for the python version by setting the
-#   PYTHON_NOVERSIONCHECK environment variable to something else than the
-#   empty string.
-#
-#   If you need to use this macro for an older Python version, please
-#   contact the authors. We're always open for feedback.
-#
-# LICENSE
-#
-#   Copyright (c) 2009 Sebastian Huber <sebastian-huber@web.de>
-#   Copyright (c) 2009 Alan W. Irwin
-#   Copyright (c) 2009 Rafael Laboissiere <rafael@laboissiere.net>
-#   Copyright (c) 2009 Andrew Collier
-#   Copyright (c) 2009 Matteo Settenvini <matteo@member.fsf.org>
-#   Copyright (c) 2009 Horst Knorr <hk_classes@knoda.org>
-#   Copyright (c) 2013 Daniel Mullner <muellner@math.stanford.edu>
-#
-#   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 <https://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 21
-
-AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL])
-AC_DEFUN([AX_PYTHON_DEVEL],[
-	#
-	# Allow the use of a (user set) custom python version
-	#
-	AC_ARG_VAR([PYTHON_VERSION],[The installed Python
-		version to use, for example '2.3'. This string
-		will be appended to the Python interpreter
-		canonical name.])
-
-	AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
-	if test -z "$PYTHON"; then
-	   AC_MSG_ERROR([Cannot find python$PYTHON_VERSION in your system path])
-	   PYTHON_VERSION=""
-	fi
-
-	#
-	# Check for a version of Python >= 2.1.0
-	#
-	AC_MSG_CHECKING([for a version of Python >= '2.1.0'])
-	ac_supports_python_ver=`$PYTHON -c "import sys; \
-		ver = sys.version.split ()[[0]]; \
-		print (ver >= '2.1.0')"`
-	if test "$ac_supports_python_ver" != "True"; then
-		if test -z "$PYTHON_NOVERSIONCHECK"; then
-			AC_MSG_RESULT([no])
-			AC_MSG_FAILURE([
-This version of the AC@&t@_PYTHON_DEVEL macro
-doesn't work properly with versions of Python before
-2.1.0. You may need to re-run configure, setting the
-variables PYTHON_CPPFLAGS, PYTHON_LIBS, PYTHON_SITE_PKG,
-PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand.
-Moreover, to disable this check, set PYTHON_NOVERSIONCHECK
-to something else than an empty string.
-])
-		else
-			AC_MSG_RESULT([skip at user request])
-		fi
-	else
-		AC_MSG_RESULT([yes])
-	fi
-
-	#
-	# if the macro parameter ``version'' is set, honour it
-	#
-	if test -n "$1"; then
-		AC_MSG_CHECKING([for a version of Python $1])
-		ac_supports_python_ver=`$PYTHON -c "import sys; \
-			ver = '.'.join(sys.version.split('.')[[:2]]); \
-			print (ver == '$1')"`
-		if test "$ac_supports_python_ver" = "True"; then
-		   AC_MSG_RESULT([yes])
-		else
-			AC_MSG_RESULT([no])
-			AC_MSG_ERROR([this package requires Python $1.
-If you have it installed, but it isn't the default Python
-interpreter in your system path, please pass the PYTHON_VERSION
-variable to configure. See ``configure --help'' for reference.
-])
-			PYTHON_VERSION=""
-		fi
-	fi
-
-	#
-	# Check if you have distutils, else fail
-	#
-	AC_MSG_CHECKING([for the distutils Python package])
-	ac_distutils_result=`$PYTHON -c "import distutils" 2>&1`
-	if test $? -eq 0; then
-		AC_MSG_RESULT([yes])
-	else
-		AC_MSG_RESULT([no])
-		AC_MSG_ERROR([cannot import Python module "distutils".
-Please check your Python installation. The error was:
-$ac_distutils_result])
-		PYTHON_VERSION=""
-	fi
-
-	#
-	# Check for Python include path
-	#
-	AC_MSG_CHECKING([for Python include path])
-	if test -z "$PYTHON_CPPFLAGS"; then
-		python_path=`$PYTHON -c "import distutils.sysconfig; \
-			print (distutils.sysconfig.get_python_inc ());"`
-		plat_python_path=`$PYTHON -c "import distutils.sysconfig; \
-			print (distutils.sysconfig.get_python_inc (plat_specific=1));"`
-		if test -n "${python_path}"; then
-			if test "${plat_python_path}" != "${python_path}"; then
-				python_path="-I$python_path -I$plat_python_path"
-			else
-				python_path="-I$python_path"
-			fi
-		fi
-		PYTHON_CPPFLAGS=$python_path
-	fi
-	AC_MSG_RESULT([$PYTHON_CPPFLAGS])
-	AC_SUBST([PYTHON_CPPFLAGS])
-
-	#
-	# Check for Python library path
-	#
-	AC_MSG_CHECKING([for Python library path])
-	if test -z "$PYTHON_LIBS"; then
-		# (makes two attempts to ensure we've got a version number
-		# from the interpreter)
-		ac_python_version=`cat<<EOD | $PYTHON -
-
-# join all versioning strings, on some systems
-# major/minor numbers could be in different list elements
-from distutils.sysconfig import *
-e = get_config_var('VERSION')
-if e is not None:
-	print(e)
-EOD`
-
-		if test -z "$ac_python_version"; then
-			if test -n "$PYTHON_VERSION"; then
-				ac_python_version=$PYTHON_VERSION
-			else
-				ac_python_version=`$PYTHON -c "import sys; \
-					print (sys.version[[:3]])"`
-			fi
-		fi
-
-		# Make the versioning information available to the compiler
-		AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"],
-                                   [If available, contains the Python version number currently in use.])
-
-		# First, the library directory:
-		ac_python_libdir=`cat<<EOD | $PYTHON -
-
-# There should be only one
-import distutils.sysconfig
-e = distutils.sysconfig.get_config_var('LIBDIR')
-if e is not None:
-	print (e)
-EOD`
-
-		# Now, for the library:
-		ac_python_library=`cat<<EOD | $PYTHON -
-
-import distutils.sysconfig
-c = distutils.sysconfig.get_config_vars()
-if 'LDVERSION' in c:
-	print ('python'+c[['LDVERSION']])
-else:
-	print ('python'+c[['VERSION']])
-EOD`
-
-		# This small piece shamelessly adapted from PostgreSQL python macro;
-		# credits goes to momjian, I think. I'd like to put the right name
-		# in the credits, if someone can point me in the right direction... ?
-		#
-		if test -n "$ac_python_libdir" -a -n "$ac_python_library"
-		then
-			# use the official shared library
-			ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"`
-			PYTHON_LIBS="-L$ac_python_libdir -l$ac_python_library"
-		else
-			# old way: use libpython from python_configdir
-			ac_python_libdir=`$PYTHON -c \
-			  "from distutils.sysconfig import get_python_lib as f; \
-			  import os; \
-			  print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"`
-			PYTHON_LIBS="-L$ac_python_libdir -lpython$ac_python_version"
-		fi
-
-		if test -z "PYTHON_LIBS"; then
-			AC_MSG_ERROR([
-  Cannot determine location of your Python DSO. Please check it was installed with
-  dynamic libraries enabled, or try setting PYTHON_LIBS by hand.
-			])
-		fi
-	fi
-	AC_MSG_RESULT([$PYTHON_LIBS])
-	AC_SUBST([PYTHON_LIBS])
-
-	#
-	# Check for site packages
-	#
-	AC_MSG_CHECKING([for Python site-packages path])
-	if test -z "$PYTHON_SITE_PKG"; then
-		PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \
-			print (distutils.sysconfig.get_python_lib(0,0));"`
-	fi
-	AC_MSG_RESULT([$PYTHON_SITE_PKG])
-	AC_SUBST([PYTHON_SITE_PKG])
-
-	#
-	# libraries which must be linked in when embedding
-	#
-	AC_MSG_CHECKING(python extra libraries)
-	if test -z "$PYTHON_EXTRA_LIBS"; then
-	   PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \
-                conf = distutils.sysconfig.get_config_var; \
-                print (conf('LIBS') + ' ' + conf('SYSLIBS'))"`
-	fi
-	AC_MSG_RESULT([$PYTHON_EXTRA_LIBS])
-	AC_SUBST(PYTHON_EXTRA_LIBS)
-
-	#
-	# linking flags needed when embedding
-	#
-	AC_MSG_CHECKING(python extra linking flags)
-	if test -z "$PYTHON_EXTRA_LDFLAGS"; then
-		PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \
-			conf = distutils.sysconfig.get_config_var; \
-			print (conf('LINKFORSHARED'))"`
-	fi
-	AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS])
-	AC_SUBST(PYTHON_EXTRA_LDFLAGS)
-
-	#
-	# final check to see if everything compiles alright
-	#
-	AC_MSG_CHECKING([consistency of all components of python development environment])
-	# save current global flags
-	ac_save_LIBS="$LIBS"
-	ac_save_LDFLAGS="$LDFLAGS"
-	ac_save_CPPFLAGS="$CPPFLAGS"
-	LIBS="$ac_save_LIBS $PYTHON_LIBS $PYTHON_EXTRA_LIBS $PYTHON_EXTRA_LIBS"
-	LDFLAGS="$ac_save_LDFLAGS $PYTHON_EXTRA_LDFLAGS"
-	CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS"
-	AC_LANG_PUSH([C])
-	AC_LINK_IFELSE([
-		AC_LANG_PROGRAM([[#include <Python.h>]],
-				[[Py_Initialize();]])
-		],[pythonexists=yes],[pythonexists=no])
-	AC_LANG_POP([C])
-	# turn back to default flags
-	CPPFLAGS="$ac_save_CPPFLAGS"
-	LIBS="$ac_save_LIBS"
-	LDFLAGS="$ac_save_LDFLAGS"
-
-	AC_MSG_RESULT([$pythonexists])
-
-        if test ! "x$pythonexists" = "xyes"; then
-	   AC_MSG_FAILURE([
-  Could not link test program to Python. Maybe the main Python library has been
-  installed in some non-standard library path. If so, pass it to configure,
-  via the LIBS environment variable.
-  Example: ./configure LIBS="-L/usr/non-standard-path/python/lib"
-  ============================================================================
-   ERROR!
-   You probably have to install the development version of the Python package
-   for your distribution.  The exact name of this package varies among them.
-  ============================================================================
-	   ])
-	  PYTHON_VERSION=""
-	fi
-
-	#
-	# all done!
-	#
-])