build: Don't store autoconf-archive macros in repo

The release tarballs will still have them

10 files changed, 7 insertions, 872 deletions

diff --git a/.travis.yml b/.travis.yml
index e13a7de7..57fb4216 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,7 +16,7 @@ addons:
     apt:
         packages:
             - automake
-            - autoconf
+            - autoconf-archive
             - imagemagick
             - intltool
             - libcanberra-dev
diff --git a/configure.ac b/configure.ac
index 08fda30d..db874e6d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,6 +13,11 @@ AC_CONFIG_MACRO_DIR([m4])
 AM_INIT_AUTOMAKE([1.11.1 dist-xz no-dist-gzip subdir-objects no-define foreign])
 AM_SILENT_RULES([yes])
 
+AC_DEFUN([HEX_CHECK_MACRO], [m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined. Is ]$2[ installed?])])])
+
+HEX_CHECK_MACRO([AX_IS_RELEASE], [autoconf-archive])
+HEX_CHECK_MACRO([PKG_PROG_PKG_CONFIG], [pkg-config])
+
 AX_IS_RELEASE([minor-version])
 AX_CHECK_ENABLE_DEBUG([yes])
 AX_REQUIRE_DEFINED([PKG_PROG_PKG_CONFIG])
@@ -576,7 +581,7 @@ dnl *********************************************************************
 dnl ** CFLAGS ***********************************************************
 dnl *********************************************************************
 
-CC_CHECK_FLAGS_APPEND([CFLAGS], [CFLAGS], [ \
+AX_APPEND_COMPILE_FLAGS([\
 	-pipe \
 	-funsigned-char \
 	-fstack-protector-strong \
diff --git a/m4/ac-check-cflags.m4 b/m4/ac-check-cflags.m4
deleted file mode 100644
index a45b17f0..00000000
--- a/m4/ac-check-cflags.m4
+++ /dev/null
@@ -1,60 +0,0 @@
-dnl Macros to check the presence of generic (non-typed) symbols.
-dnl Copyright (c) 2006-2008 Diego Pettenò <flameeyes@gmail.com>
-dnl Copyright (c) 2006-2008 xine project
-dnl Copyright (c) 2012 Lucas De Marchi <lucas.de.marchi@gmail.com>
-dnl
-dnl This program 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 2, or (at your option)
-dnl any later version.
-dnl
-dnl This program 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 program; if not, write to the Free Software
-dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-dnl 02110-1301, USA.
-dnl
-dnl As a special exception, the copyright owners of the
-dnl macro gives unlimited permission to copy, distribute and modify the
-dnl configure scripts that are the output of Autoconf when processing the
-dnl Macro. You need not follow the terms of the GNU General Public
-dnl License when using or distributing such scripts, even though portions
-dnl of the text of the Macro appear in them. The GNU General Public
-dnl License (GPL) does govern all other use of the material that
-dnl constitutes the Autoconf Macro.
-dnl
-dnl This special exception to the GPL applies to versions of the
-dnl Autoconf Macro released by this project. When you make and
-dnl distribute a modified version of the Autoconf Macro, you may extend
-dnl this special exception to the GPL to apply to your modified version as
-dnl well.
-
-dnl Check if FLAG in ENV-VAR is supported by compiler and append it
-dnl to WHERE-TO-APPEND variable
-dnl CC_CHECK_FLAG_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG])
-
-AC_DEFUN([CC_CHECK_FLAG_APPEND], [
-  AC_CACHE_CHECK([if $CC supports flag $3 in envvar $2],
-                 AS_TR_SH([cc_cv_$2_$3]),
-		 [eval "AS_TR_SH([cc_save_$2])='${$2}'"
-		  eval "AS_TR_SH([$2])='$3'"
-		  AC_COMPILE_IFELSE([AC_LANG_SOURCE([int a = 0; int main(void) { return a; } ])],
-                                    [eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
-                                    [eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
-		  eval "AS_TR_SH([$2])='$cc_save_$2'"])
-
-  AS_IF([eval test x$]AS_TR_SH([cc_cv_$2_$3])[ = xyes],
-        [eval "$1='${$1} $3'"])
-])
-
-dnl CC_CHECK_FLAGS_APPEND([WHERE-TO-APPEND], [ENV-VAR], [FLAG1 FLAG2])
-AC_DEFUN([CC_CHECK_FLAGS_APPEND], [
-  for flag in $3; do
-    CC_CHECK_FLAG_APPEND($1, $2, $flag)
-  done
-])
-
diff --git a/m4/ax_append_link_flags.m4 b/m4/ax_append_link_flags.m4
deleted file mode 100644
index c73ddafc..00000000
--- a/m4/ax_append_link_flags.m4
+++ /dev/null
@@ -1,63 +0,0 @@
-# ===========================================================================
-#   http://www.gnu.org/software/autoconf-archive/ax_append_link_flags.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_APPEND_LINK_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS])
-#
-# DESCRIPTION
-#
-#   For every FLAG1, FLAG2 it is checked whether the linker works with the
-#   flag.  If it does, the flag is added FLAGS-VARIABLE
-#
-#   If FLAGS-VARIABLE is not specified, the linker's flags (LDFLAGS) is
-#   used. During the check the flag is always added to the linker's flags.
-#
-#   If EXTRA-FLAGS is defined, it is added to the linker's default flags
-#   when the check is done.  The check is thus made with the flags: "LDFLAGS
-#   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
-#   issue an error when a bad flag is given.
-#
-#   NOTE: This macro depends on the AX_APPEND_FLAG and AX_CHECK_LINK_FLAG.
-#   Please keep this macro in sync with AX_APPEND_COMPILE_FLAGS.
-#
-# LICENSE
-#
-#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
-#
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
-
-#serial 4
-
-AC_DEFUN([AX_APPEND_LINK_FLAGS],
-[AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG])
-AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
-for flag in $1; do
-  AX_CHECK_LINK_FLAG([$flag], [AX_APPEND_FLAG([$flag], [m4_default([$2], [LDFLAGS])])], [], [$3])
-done
-])dnl AX_APPEND_LINK_FLAGS
diff --git a/m4/ax_check_enable_debug.m4 b/m4/ax_check_enable_debug.m4
deleted file mode 100644
index f99d75fe..00000000
--- a/m4/ax_check_enable_debug.m4
+++ /dev/null
@@ -1,124 +0,0 @@
-# ===========================================================================
-#   http://www.gnu.org/software/autoconf-archive/ax_check_enable_debug.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_CHECK_ENABLE_DEBUG([enable by default=yes/info/profile/no], [ENABLE DEBUG VARIABLES ...], [DISABLE DEBUG VARIABLES NDEBUG ...], [IS-RELEASE])
-#
-# DESCRIPTION
-#
-#   Check for the presence of an --enable-debug option to configure, with
-#   the specified default value used when the option is not present.  Return
-#   the value in the variable $ax_enable_debug.
-#
-#   Specifying 'yes' adds '-g -O0' to the compilation flags for all
-#   languages. Specifying 'info' adds '-g' to the compilation flags.
-#   Specifying 'profile' adds '-g -pg' to the compilation flags and '-pg' to
-#   the linking flags. Otherwise, nothing is added.
-#
-#   Define the variables listed in the second argument if debug is enabled,
-#   defaulting to no variables.  Defines the variables listed in the third
-#   argument if debug is disabled, defaulting to NDEBUG.  All lists of
-#   variables should be space-separated.
-#
-#   If debug is not enabled, ensure AC_PROG_* will not add debugging flags.
-#   Should be invoked prior to any AC_PROG_* compiler checks.
-#
-#   IS-RELEASE can be used to change the default to 'no' when making a
-#   release.  Set IS-RELEASE to 'yes' or 'no' as appropriate. By default, it
-#   uses the value of $ax_is_release, so if you are using the AX_IS_RELEASE
-#   macro, there is no need to pass this parameter.
-#
-#     AX_IS_RELEASE([git-directory])
-#     AX_CHECK_ENABLE_DEBUG()
-#
-# LICENSE
-#
-#   Copyright (c) 2011 Rhys Ulerich <rhys.ulerich@gmail.com>
-#   Copyright (c) 2014, 2015 Philip Withnall <philip@tecnocode.co.uk>
-#
-#   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.
-
-#serial 5
-
-AC_DEFUN([AX_CHECK_ENABLE_DEBUG],[
-    AC_BEFORE([$0],[AC_PROG_CC])dnl
-    AC_BEFORE([$0],[AC_PROG_CXX])dnl
-    AC_BEFORE([$0],[AC_PROG_F77])dnl
-    AC_BEFORE([$0],[AC_PROG_FC])dnl
-
-    AC_MSG_CHECKING(whether to enable debugging)
-
-    ax_enable_debug_default=m4_tolower(m4_normalize(ifelse([$1],,[no],[$1])))
-    ax_enable_debug_is_release=m4_tolower(m4_normalize(ifelse([$4],,
-                                                              [$ax_is_release],
-                                                              [$4])))
-
-    # If this is a release, override the default.
-    AS_IF([test "$ax_enable_debug_is_release" = "yes"],
-      [ax_enable_debug_default="no"])
-
-    m4_define(ax_enable_debug_vars,[m4_normalize(ifelse([$2],,,[$2]))])
-    m4_define(ax_disable_debug_vars,[m4_normalize(ifelse([$3],,[NDEBUG],[$3]))])
-
-    AC_ARG_ENABLE(debug,
-	[AS_HELP_STRING([--enable-debug=]@<:@yes/info/profile/no@:>@,[compile with debugging])],
-	[],enable_debug=$ax_enable_debug_default)
-
-    # empty mean debug yes
-    AS_IF([test "x$enable_debug" = "x"],
-      [enable_debug="yes"])
-
-    # case of debug
-    AS_CASE([$enable_debug],
-      [yes],[
-	AC_MSG_RESULT(yes)
-	CFLAGS="${CFLAGS} -g -O0"
-	CXXFLAGS="${CXXFLAGS} -g -O0"
-	FFLAGS="${FFLAGS} -g -O0"
-	FCFLAGS="${FCFLAGS} -g -O0"
-	OBJCFLAGS="${OBJCFLAGS} -g -O0"
-      ],
-      [info],[
-	AC_MSG_RESULT(info)
-	CFLAGS="${CFLAGS} -g"
-	CXXFLAGS="${CXXFLAGS} -g"
-	FFLAGS="${FFLAGS} -g"
-	FCFLAGS="${FCFLAGS} -g"
-	OBJCFLAGS="${OBJCFLAGS} -g"
-      ],
-      [profile],[
-	AC_MSG_RESULT(profile)
-	CFLAGS="${CFLAGS} -g -pg"
-	CXXFLAGS="${CXXFLAGS} -g -pg"
-	FFLAGS="${FFLAGS} -g -pg"
-	FCFLAGS="${FCFLAGS} -g -pg"
-	OBJCFLAGS="${OBJCFLAGS} -g -pg"
-	LDFLAGS="${LDFLAGS} -pg"
-      ],
-      [
-	AC_MSG_RESULT(no)
-	dnl Ensure AC_PROG_CC/CXX/F77/FC/OBJC will not enable debug flags
-	dnl by setting any unset environment flag variables
-	AS_IF([test "x${CFLAGS+set}" != "xset"],
-	  [CFLAGS=""])
-	AS_IF([test "x${CXXFLAGS+set}" != "xset"],
-	  [CXXFLAGS=""])
-	AS_IF([test "x${FFLAGS+set}" != "xset"],
-	  [FFLAGS=""])
-	AS_IF([test "x${FCFLAGS+set}" != "xset"],
-	  [FCFLAGS=""])
-	AS_IF([test "x${OBJCFLAGS+set}" != "xset"],
-	  [OBJCFLAGS=""])
-      ])
-
-    dnl Define various variables if debugging is disabled.
-    dnl assert.h is a NOP if NDEBUG is defined, so define it by default.
-    AS_IF([test "x$enable_debug" = "xyes"],
-      [m4_map_args_w(ax_enable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is enabled])])],
-      [m4_map_args_w(ax_disable_debug_vars, [AC_DEFINE(], [,,[Define if debugging is disabled])])])
-    ax_enable_debug=$enable_debug
-])
diff --git a/m4/ax_check_link_flag.m4 b/m4/ax_check_link_flag.m4
deleted file mode 100644
index eb01a6ce..00000000
--- a/m4/ax_check_link_flag.m4
+++ /dev/null
@@ -1,74 +0,0 @@
-# ===========================================================================
-#    http://www.gnu.org/software/autoconf-archive/ax_check_link_flag.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
-#
-# DESCRIPTION
-#
-#   Check whether the given FLAG works with the linker or gives an error.
-#   (Warnings, however, are ignored)
-#
-#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
-#   success/failure.
-#
-#   If EXTRA-FLAGS is defined, it is added to the linker's default flags
-#   when the check is done.  The check is thus made with the flags: "LDFLAGS
-#   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
-#   issue an error when a bad flag is given.
-#
-#   INPUT gives an alternative input source to AC_LINK_IFELSE.
-#
-#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
-#   macro in sync with AX_CHECK_{PREPROC,COMPILE}_FLAG.
-#
-# LICENSE
-#
-#   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
-#   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
-#
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
-
-#serial 4
-
-AC_DEFUN([AX_CHECK_LINK_FLAG],
-[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
-AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl
-AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [
-  ax_check_save_flags=$LDFLAGS
-  LDFLAGS="$LDFLAGS $4 $1"
-  AC_LINK_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
-    [AS_VAR_SET(CACHEVAR,[yes])],
-    [AS_VAR_SET(CACHEVAR,[no])])
-  LDFLAGS=$ax_check_save_flags])
-AS_VAR_IF(CACHEVAR,yes,
-  [m4_default([$2], :)],
-  [m4_default([$3], :)])
-AS_VAR_POPDEF([CACHEVAR])dnl
-])dnl AX_CHECK_LINK_FLAGS
diff --git a/m4/ax_is_release.m4 b/m4/ax_is_release.m4
deleted file mode 100644
index 9ec67469..00000000
--- a/m4/ax_is_release.m4
+++ /dev/null
@@ -1,69 +0,0 @@
-# ===========================================================================
-#       http://www.gnu.org/software/autoconf-archive/ax_is_release.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_IS_RELEASE(POLICY)
-#
-# DESCRIPTION
-#
-#   Determine whether the code is being configured as a release, or from
-#   git. Set the ax_is_release variable to 'yes' or 'no'.
-#
-#   If building a release version, it is recommended that the configure
-#   script disable compiler errors and debug features, by conditionalising
-#   them on the ax_is_release variable.  If building from git, these
-#   features should be enabled.
-#
-#   The POLICY parameter specifies how ax_is_release is determined. It can
-#   take the following values:
-#
-#    * git-directory:  ax_is_release will be 'no' if a '.git' directory exists
-#    * minor-version:  ax_is_release will be 'no' if the minor version number
-#                      in $PACKAGE_VERSION is odd; this assumes
-#                      $PACKAGE_VERSION follows the 'major.minor.micro' scheme
-#    * micro-version:  ax_is_release will be 'no' if the micro version number
-#                      in $PACKAGE_VERSION is odd; this assumes
-#                      $PACKAGE_VERSION follows the 'major.minor.micro' scheme
-#    * always:         ax_is_release will always be 'yes'
-#    * never:          ax_is_release will always be 'no'
-#
-#   Other policies may be added in future.
-#
-# LICENSE
-#
-#   Copyright (c) 2015 Philip Withnall <philip@tecnocode.co.uk>
-#
-#   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.
-
-#serial 3
-
-AC_DEFUN([AX_IS_RELEASE],[
-    AC_BEFORE([AC_INIT],[$0])
-
-    m4_case([$1],
-      [git-directory],[
-        # $is_release = (.git directory does not exist)
-        AS_IF([test -d .git],[ax_is_release=no],[ax_is_release=yes])
-      ],
-      [minor-version],[
-        # $is_release = ($minor_version is even)
-        minor_version=`echo "$PACKAGE_VERSION" | sed 's/[[^.]][[^.]]*.\([[^.]][[^.]]*\).*/\1/'`
-        AS_IF([test "$(( $minor_version % 2 ))" -ne 0],
-              [ax_is_release=no],[ax_is_release=yes])
-      ],
-      [micro-version],[
-        # $is_release = ($micro_version is even)
-        micro_version=`echo "$PACKAGE_VERSION" | sed 's/[[^.]]*\.[[^.]]*\.\([[^.]]*\).*/\1/'`
-        AS_IF([test "$(( $micro_version % 2 ))" -ne 0],
-              [ax_is_release=no],[ax_is_release=yes])
-      ],
-      [always],[ax_is_release=yes],
-      [never],[ax_is_release=no],
-      [
-        AC_MSG_ERROR([Invalid policy. Valid policies: git-directory, minor-version.])
-      ])
-])
diff --git a/m4/ax_perl_ext_flags.m4 b/m4/ax_perl_ext_flags.m4
deleted file mode 100644
index 03f16435..00000000
--- a/m4/ax_perl_ext_flags.m4
+++ /dev/null
@@ -1,116 +0,0 @@
-# ===========================================================================
-#     http://www.gnu.org/software/autoconf-archive/ax_perl_ext_flags.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_PERL_EXT_FLAGS([CFLAGS-VARIABLE], [LDFLAGS-VARIABLE], [EXTRA-MODULES])
-#   AX_PERL_EXT_CFLAGS([CFLAGS-VARIABLE])
-#   AX_PERL_EXT_LDFLAGS([LDFLAGS-VARIABLE], [EXTRA-MODULES])
-#
-# DESCRIPTION
-#
-#   Fetches the linker flags and C compiler flags for compiling and linking
-#   programs that embed a Perl interpreter. If the EXTRA-MODULES argument is
-#   submitted, it is a space separated list of extra modules to link. The
-#   flags will be stored in the provided variables.
-#
-#   Examples:
-#
-#     AX_PERL_EXT_FLAGS([PERLXS_CFLAGS], [PERLXS_LDFLAGS])
-#     AC_SUBST([PERLXS_CFLAGS])
-#     AC_SUBST([PERLXS_LDFLAGS])
-#
-#     AX_PERL_EXT_CFLAGS([PERLXS_CFLAGS])
-#     AC_SUBST([PERLXS_CFLAGS])
-#
-#     AX_PERL_EXT_LDFLAGS([PERLXS_LDFLAGS], [-std Socket])
-#
-# LICENSE
-#
-#   Copyright (c) 2009 Mats Kindahl of Sun Microsystems <mats@sun.com>
-#
-#   Redistribution and use in source and binary forms, with or without
-#   modification, are permitted provided that the following conditions are
-#   met:
-#
-#   1. Redistributions of source code must retain the above copyright
-#   notice, this list of conditions and the following disclaimer.
-#
-#   2. Redistributions in binary form must reproduce the above copyright
-#   notice, this list of conditions and the following disclaimer in the
-#   documentation and/or other materials provided with the distribution.
-#
-#   3. The name of the author may not be used to endorse or promote products
-#   derived from this software without specific prior written permission.
-#
-#   THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-#   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-#   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-#   DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-#   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-#   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-#   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-#   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-#   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-#   ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-#   POSSIBILITY OF SUCH DAMAGE.
-
-#serial 5
-
-AC_DEFUN([AX_PERL_EXT_CFLAGS],
-[AC_CHECK_PROG(PERL,perl,perl)
- _AX_PERL_EXT_MODULE_CHECK([ExtUtils::Embed], [have_embed=yes],
-                           [have_embed=no])
- AS_IF([test $have_embed = no],
-       AC_MSG_ERROR([Require ExtUtils::Embed to proceed]))
- _AX_PERL_EXT_EMBED_CHECK([$1],[ccopts])
-])
-
-
-AC_DEFUN([AX_PERL_EXT_LDFLAGS],
-[AC_CHECK_PROG(PERL,perl,perl)
- _AX_PERL_EXT_MODULE_CHECK([ExtUtils::Embed], [have_embed=yes],
-                           [have_embed=no])
- AS_IF([test $have_embed = no],
-       AC_MSG_ERROR([Require ExtUtils::Embed to proceed]))
- _AX_PERL_EXT_EMBED_CHECK([$1],[ldopts],[$2])
-])
-
-
-AC_DEFUN([AX_PERL_EXT_FLAGS],
-[AC_CHECK_PROG(PERL,perl,perl)
- _AX_PERL_EXT_MODULE_CHECK([ExtUtils::Embed], [have_embed=yes],
-                           [have_embed=no])
- AS_IF([test $have_embed = no],
-       AC_MSG_ERROR([Require ExtUtils::Embed to proceed]))
- _AX_PERL_EXT_EMBED_CHECK([$1],[ccopts])
- _AX_PERL_EXT_EMBED_CHECK([$2],[ldopts],[$3])
-])
-
-
-dnl _AX_PERL_EXT_MODULE_CHECK(MODULE-NAME, ACTION-IF-FOUND, ACTION-IF-NOT-FOUND)
-dnl
-dnl Check for the existance of the perl module given by MODULE-NAME.
-dnl
-AC_DEFUN([_AX_PERL_EXT_MODULE_CHECK],
-[AC_MSG_CHECKING([for perl module $1])
- $PERL "-M$1" -e exit > /dev/null 2>&1
- AS_IF([test $? -eq 0],
- [AC_MSG_RESULT(yes)
-  $2],
- [AC_MSG_RESULT(no)
-  $3])
-])
-
-dnl _AX_PERL_EXT_EMBED_CHECK(VARIABLE, COMMAND, [EXTRA-FLAGS]) Use
-dnl
-dnl ExtUtils::Embed fetch flags for embedding Perl in a C/C++
-dnl application
-dnl
-AC_DEFUN([_AX_PERL_EXT_EMBED_CHECK],
-[AC_MSG_CHECKING([for perl $2 embed flags])
- ax_c_perlxs_extras="$3"
- $1=`$PERL -MExtUtils::Embed -e $2 ${ax_c_perlxs_extras:+"-- $3"}`
- AC_MSG_RESULT($$1)
-])
diff --git a/m4/ax_python_devel.m4 b/m4/ax_python_devel.m4
deleted file mode 100644
index f18ed8a0..00000000
--- a/m4/ax_python_devel.m4
+++ /dev/null
@@ -1,327 +0,0 @@
-# ===========================================================================
-#      http://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 <http://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
-
-#serial 18
-
-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 = sys.version.split ()[[0]]; \
-			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 -z "$ac_distutils_result"; then
-		AC_MSG_RESULT([yes])
-	else
-		AC_MSG_RESULT([no])
-		AC_MSG_ERROR([cannot import Python module "distutils".
-Please check your Python installation. The error was:
-$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_LDFLAGS"; then
-	   PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \
-                conf = distutils.sysconfig.get_config_var; \
-                print (conf('LIBS') + ' ' + conf('SYSLIBS'))"`
-	fi
-	AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS])
-	AC_SUBST(PYTHON_EXTRA_LDFLAGS)
-
-	#
-	# linking flags needed when embedding
-	#
-	AC_MSG_CHECKING(python extra linking flags)
-	if test -z "$PYTHON_EXTRA_LIBS"; then
-		PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \
-			conf = distutils.sysconfig.get_config_var; \
-			print (conf('LINKFORSHARED'))"`
-	fi
-	AC_MSG_RESULT([$PYTHON_EXTRA_LIBS])
-	AC_SUBST(PYTHON_EXTRA_LIBS)
-
-	#
-	# final check to see if everything compiles alright
-	#
-	AC_MSG_CHECKING([consistency of all components of python development environment])
-	# save current global flags
-	ac_save_LIBS="$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!
-	#
-])
diff --git a/m4/ax_require_defined.m4 b/m4/ax_require_defined.m4
deleted file mode 100644
index cae11112..00000000
--- a/m4/ax_require_defined.m4
+++ /dev/null
@@ -1,37 +0,0 @@
-# ===========================================================================
-#    http://www.gnu.org/software/autoconf-archive/ax_require_defined.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_REQUIRE_DEFINED(MACRO)
-#
-# DESCRIPTION
-#
-#   AX_REQUIRE_DEFINED is a simple helper for making sure other macros have
-#   been defined and thus are available for use.  This avoids random issues
-#   where a macro isn't expanded.  Instead the configure script emits a
-#   non-fatal:
-#
-#     ./configure: line 1673: AX_CFLAGS_WARN_ALL: command not found
-#
-#   It's like AC_REQUIRE except it doesn't expand the required macro.
-#
-#   Here's an example:
-#
-#     AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG])
-#
-# LICENSE
-#
-#   Copyright (c) 2014 Mike Frysinger <vapier@gentoo.org>
-#
-#   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 1
-
-AC_DEFUN([AX_REQUIRE_DEFINED], [dnl
-  m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined; is a m4 file missing?])])
-])dnl AX_REQUIRE_DEFINED