# generated automatically by aclocal 1.15.1 -*- Autoconf -*-

# Copyright (C) 1996-2017 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 program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY, to the extent permitted by law; without

# even the implied warranty of MERCHANTABILITY or FITNESS FOR A

# PARTICULAR PURPOSE.

m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])

m4_ifndef([AC_AUTOCONF_VERSION],

  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl

m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],,

[m4_warning([this file was generated for autoconf 2.69.

You have another version of autoconf.  It may work, but is not guaranteed to.

If you have problems, you may need to regenerate the build system entirely.

To do so, use the procedure documented by the package, typically 'autoreconf'.])])

# ===========================================================================

#    https://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 2

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

# pkg.m4 - Macros to locate and utilise pkg-config.   -*- Autoconf -*-

# serial 11 (pkg-config-0.29.1)

dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.

dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@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 of the License, or

dnl (at your option) any later version.

dnl

dnl This program is distributed in the hope that it will be useful, but

dnl WITHOUT ANY WARRANTY; without even the implied warranty of

dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

dnl 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., 59 Temple Place - Suite 330, Boston, MA

dnl 02111-1307, USA.

dnl

dnl As a special exception to the GNU General Public License, if you

dnl distribute this file as part of a program that contains a

dnl configuration script generated by Autoconf, you may include it under

dnl the same distribution terms that you use for the rest of that

dnl program.

dnl PKG_PREREQ(MIN-VERSION)

dnl -----------------------

dnl Since: 0.29

dnl

dnl Verify that the version of the pkg-config macros are at least

dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's

dnl installed version of pkg-config, this checks the developer's version

dnl of pkg.m4 when generating configure.

dnl

dnl To ensure that this macro is defined, also add:

dnl m4_ifndef([PKG_PREREQ],

dnl     [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])])

dnl

dnl See the "Since" comment for each macro you use to see what version

dnl of the macros you require.

m4_defun([PKG_PREREQ],

[m4_define([PKG_MACROS_VERSION], [0.29.1])

m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,

    [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])

])dnl PKG_PREREQ

dnl PKG_PROG_PKG_CONFIG([MIN-VERSION])

dnl ----------------------------------

dnl Since: 0.16

dnl

dnl Search for the pkg-config tool and set the PKG_CONFIG variable to

dnl first found in the path. Checks that the version of pkg-config found

dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.9.0 is

dnl used since that's the first version where most current features of

dnl pkg-config existed.

AC_DEFUN([PKG_PROG_PKG_CONFIG],

[m4_pattern_forbid([^_?PKG_[A-Z_]+$])

m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])

m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])

AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])

AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])

AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])

if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then

	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])

fi

if test -n "$PKG_CONFIG"; then

	_pkg_min_version=m4_default([$1], [0.9.0])

	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])

	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then

		AC_MSG_RESULT([yes])

	else

		AC_MSG_RESULT([no])

		PKG_CONFIG=""

	fi

fi[]dnl

])dnl PKG_PROG_PKG_CONFIG

dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])

dnl -------------------------------------------------------------------

dnl Since: 0.18

dnl

dnl Check to see whether a particular set of modules exists. Similar to

dnl PKG_CHECK_MODULES(), but does not set variables or print errors.

dnl

dnl Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])

dnl only at the first occurence in configure.ac, so if the first place

dnl it's called might be skipped (such as if it is within an "if", you

dnl have to call PKG_CHECK_EXISTS manually

AC_DEFUN([PKG_CHECK_EXISTS],

[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl

if test -n "$PKG_CONFIG" && \

    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then

  m4_default([$2], [:])

m4_ifvaln([$3], [else

  $3])dnl

fi])

dnl _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])

dnl ---------------------------------------------

dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting

dnl pkg_failed based on the result.

m4_define([_PKG_CONFIG],

[if test -n "$$1"; then

    pkg_cv_[]$1="$$1"

 elif test -n "$PKG_CONFIG"; then

    PKG_CHECK_EXISTS([$3],

                     [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`

		      test "x$?" != "x0" && pkg_failed=yes ],

		     [pkg_failed=yes])

 else

    pkg_failed=untried

fi[]dnl

])dnl _PKG_CONFIG

dnl _PKG_SHORT_ERRORS_SUPPORTED

dnl ---------------------------

dnl Internal check to see if pkg-config supports short errors.

AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],

[AC_REQUIRE([PKG_PROG_PKG_CONFIG])

if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then

        _pkg_short_errors_supported=yes

else

        _pkg_short_errors_supported=no

fi[]dnl

])dnl _PKG_SHORT_ERRORS_SUPPORTED

dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],

dnl   [ACTION-IF-NOT-FOUND])

dnl --------------------------------------------------------------

dnl Since: 0.4.0

dnl

dnl Note that if there is a possibility the first call to

dnl PKG_CHECK_MODULES might not happen, you should be sure to include an

dnl explicit call to PKG_PROG_PKG_CONFIG in your configure.ac

AC_DEFUN([PKG_CHECK_MODULES],

[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl

AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl

AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl

pkg_failed=no

AC_MSG_CHECKING([for $1])

_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])

_PKG_CONFIG([$1][_LIBS], [libs], [$2])

m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS

and $1[]_LIBS to avoid the need to call pkg-config.

See the pkg-config man page for more details.])

if test $pkg_failed = yes; then

   	AC_MSG_RESULT([no])

        _PKG_SHORT_ERRORS_SUPPORTED

        if test $_pkg_short_errors_supported = yes; then

	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`

        else 

	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`

        fi

	# Put the nasty error message in config.log where it belongs

	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD

	m4_default([$4], [AC_MSG_ERROR(

[Package requirements ($2) were not met:

$$1_PKG_ERRORS

Consider adjusting the PKG_CONFIG_PATH environment variable if you

installed software in a non-standard prefix.

_PKG_TEXT])[]dnl

        ])

elif test $pkg_failed = untried; then

     	AC_MSG_RESULT([no])

	m4_default([$4], [AC_MSG_FAILURE(

[The pkg-config script could not be found or is too old.  Make sure it

is in your PATH or set the PKG_CONFIG environment variable to the full

path to pkg-config.

_PKG_TEXT

To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl

        ])

else

	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS

	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS

        AC_MSG_RESULT([yes])

	$3

fi[]dnl

])dnl PKG_CHECK_MODULES

dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],

dnl   [ACTION-IF-NOT-FOUND])

dnl ---------------------------------------------------------------------

dnl Since: 0.29

dnl

dnl Checks for existence of MODULES and gathers its build flags with

dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags

dnl and VARIABLE-PREFIX_LIBS from --libs.

dnl

dnl Note that if there is a possibility the first call to

dnl PKG_CHECK_MODULES_STATIC might not happen, you should be sure to

dnl include an explicit call to PKG_PROG_PKG_CONFIG in your

dnl configure.ac.

AC_DEFUN([PKG_CHECK_MODULES_STATIC],

[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl

_save_PKG_CONFIG=$PKG_CONFIG

PKG_CONFIG="$PKG_CONFIG --static"

PKG_CHECK_MODULES($@)

PKG_CONFIG=$_save_PKG_CONFIG[]dnl

])dnl PKG_CHECK_MODULES_STATIC

dnl PKG_INSTALLDIR([DIRECTORY])

dnl -------------------------

dnl Since: 0.27

dnl

dnl Substitutes the variable pkgconfigdir as the location where a module

dnl should install pkg-config .pc files. By default the directory is

dnl $libdir/pkgconfig, but the default can be changed by passing

dnl DIRECTORY. The user can override through the --with-pkgconfigdir

dnl parameter.

AC_DEFUN([PKG_INSTALLDIR],

[m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])

m4_pushdef([pkg_description],

    [pkg-config installation directory @<:@]pkg_default[@:>@])

AC_ARG_WITH([pkgconfigdir],

    [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,

    [with_pkgconfigdir=]pkg_default)

AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])

m4_popdef([pkg_default])

m4_popdef([pkg_description])

])dnl PKG_INSTALLDIR

dnl PKG_NOARCH_INSTALLDIR([DIRECTORY])

dnl --------------------------------

dnl Since: 0.27

dnl

dnl Substitutes the variable noarch_pkgconfigdir as the location where a

dnl module should install arch-independent pkg-config .pc files. By

dnl default the directory is $datadir/pkgconfig, but the default can be

dnl changed by passing DIRECTORY. The user can override through the

dnl --with-noarch-pkgconfigdir parameter.

AC_DEFUN([PKG_NOARCH_INSTALLDIR],

[m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])

m4_pushdef([pkg_description],

    [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])

AC_ARG_WITH([noarch-pkgconfigdir],

    [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,

    [with_noarch_pkgconfigdir=]pkg_default)

AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])

m4_popdef([pkg_default])

m4_popdef([pkg_description])

])dnl PKG_NOARCH_INSTALLDIR

dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,

dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])

dnl -------------------------------------------

dnl Since: 0.28

dnl

dnl Retrieves the value of the pkg-config variable for the given module.

AC_DEFUN([PKG_CHECK_VAR],

[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl

AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl

_PKG_CONFIG([$1], [variable="][$3]["], [$2])

AS_VAR_COPY([$1], [pkg_cv_][$1])

AS_VAR_IF([$1], [""], [$5], [$4])dnl

])dnl PKG_CHECK_VAR

dnl PKG_WITH_MODULES(VARIABLE-PREFIX, MODULES,

dnl   [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND],

dnl   [DESCRIPTION], [DEFAULT])

dnl ------------------------------------------

dnl

dnl Prepare a "--with-" configure option using the lowercase

dnl [VARIABLE-PREFIX] name, merging the behaviour of AC_ARG_WITH and

dnl PKG_CHECK_MODULES in a single macro.

AC_DEFUN([PKG_WITH_MODULES],

[

m4_pushdef([with_arg], m4_tolower([$1]))

m4_pushdef([description],

           [m4_default([$5], [build with ]with_arg[ support])])

m4_pushdef([def_arg], [m4_default([$6], [auto])])

m4_pushdef([def_action_if_found], [AS_TR_SH([with_]with_arg)=yes])

m4_pushdef([def_action_if_not_found], [AS_TR_SH([with_]with_arg)=no])

m4_case(def_arg,

            [yes],[m4_pushdef([with_without], [--without-]with_arg)],

            [m4_pushdef([with_without],[--with-]with_arg)])

AC_ARG_WITH(with_arg,

     AS_HELP_STRING(with_without, description[ @<:@default=]def_arg[@:>@]),,

    [AS_TR_SH([with_]with_arg)=def_arg])

AS_CASE([$AS_TR_SH([with_]with_arg)],

            [yes],[PKG_CHECK_MODULES([$1],[$2],$3,$4)],

            [auto],[PKG_CHECK_MODULES([$1],[$2],

                                        [m4_n([def_action_if_found]) $3],

                                        [m4_n([def_action_if_not_found]) $4])])

m4_popdef([with_arg])

m4_popdef([description])

m4_popdef([def_arg])

])dnl PKG_WITH_MODULES

dnl PKG_HAVE_WITH_MODULES(VARIABLE-PREFIX, MODULES,

dnl   [DESCRIPTION], [DEFAULT])

dnl -----------------------------------------------

dnl

dnl Convenience macro to trigger AM_CONDITIONAL after PKG_WITH_MODULES

dnl check._[VARIABLE-PREFIX] is exported as make variable.

AC_DEFUN([PKG_HAVE_WITH_MODULES],

[

PKG_WITH_MODULES([$1],[$2],,,[$3],[$4])

AM_CONDITIONAL([HAVE_][$1],

               [test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"])

])dnl PKG_HAVE_WITH_MODULES

dnl PKG_HAVE_DEFINE_WITH_MODULES(VARIABLE-PREFIX, MODULES,

dnl   [DESCRIPTION], [DEFAULT])

dnl ------------------------------------------------------

dnl

dnl Convenience macro to run AM_CONDITIONAL and AC_DEFINE after

dnl PKG_WITH_MODULES check. HAVE_[VARIABLE-PREFIX] is exported as make

dnl and preprocessor variable.

AC_DEFUN([PKG_HAVE_DEFINE_WITH_MODULES],

[

PKG_HAVE_WITH_MODULES([$1],[$2],[$3],[$4])

AS_IF([test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"],

        [AC_DEFINE([HAVE_][$1], 1, [Enable ]m4_tolower([$1])[ support])])

])dnl PKG_HAVE_DEFINE_WITH_MODULES

# Copyright (C) 2002-2017 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.

# AM_AUTOMAKE_VERSION(VERSION)

# ----------------------------

# Automake X.Y traces this macro to ensure aclocal.m4 has been

# generated from the m4 files accompanying Automake X.Y.

# (This private macro should not be called outside this file.)

AC_DEFUN([AM_AUTOMAKE_VERSION],

[am__api_version='1.15'

dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to

dnl require some minimum version.  Point them to the right macro.

m4_if([$1], [1.15.1], [],

      [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl

])

# _AM_AUTOCONF_VERSION(VERSION)

# -----------------------------

# aclocal traces this macro to find the Autoconf version.

# This is a private macro too.  Using m4_define simplifies

# the logic in aclocal, which can simply ignore this definition.

m4_define([_AM_AUTOCONF_VERSION], [])

# AM_SET_CURRENT_AUTOMAKE_VERSION

# -------------------------------

# Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.

# This function is AC_REQUIREd by AM_INIT_AUTOMAKE.

AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],

[AM_AUTOMAKE_VERSION([1.15.1])dnl

m4_ifndef([AC_AUTOCONF_VERSION],

  [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl

_AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])

# Copyright (C) 2011-2017 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.

# AM_PROG_AR([ACT-IF-FAIL])

# -------------------------

# Try to determine the archiver interface, and trigger the ar-lib wrapper

# if it is needed.  If the detection of archiver interface fails, run

# ACT-IF-FAIL (default is to abort configure with a proper error message).

AC_DEFUN([AM_PROG_AR],

[AC_BEFORE([$0], [LT_INIT])dnl

AC_BEFORE([$0], [AC_PROG_LIBTOOL])dnl

AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl

AC_REQUIRE_AUX_FILE([ar-lib])dnl

AC_CHECK_TOOLS([AR], [ar lib "link -lib"], [false])

: ${AR=ar}

AC_CACHE_CHECK([the archiver ($AR) interface], [am_cv_ar_interface],

  [AC_LANG_PUSH([C])

   am_cv_ar_interface=ar

   AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int some_variable = 0;]])],

     [am_ar_try='$AR cru libconftest.a conftest.$ac_objext >&AS_MESSAGE_LOG_FD'

      AC_TRY_EVAL([am_ar_try])

      if test "$ac_status" -eq 0; then

        am_cv_ar_interface=ar

      else

        am_ar_try='$AR -NOLOGO -OUT:conftest.lib conftest.$ac_objext >&AS_MESSAGE_LOG_FD'

        AC_TRY_EVAL([am_ar_try])

        if test "$ac_status" -eq 0; then

          am_cv_ar_interface=lib

        else

          am_cv_ar_interface=unknown

        fi

      fi

      rm -f conftest.lib libconftest.a

     ])

   AC_LANG_POP([C])])

case $am_cv_ar_interface in

ar)

  ;;

lib)

  # Microsoft lib, so override with the ar-lib wrapper script.

  # FIXME: It is wrong to rewrite AR.

  # But if we don't then we get into trouble of one sort or another.

  # A longer-term fix would be to have automake use am__AR in this case,

  # and then we could set am__AR="$am_aux_dir/ar-lib \$(AR)" or something

  # similar.

  AR="$am_aux_dir/ar-lib $AR"

  ;;

unknown)

  m4_default([$1],

             [AC_MSG_ERROR([could not determine $AR interface])])

  ;;

esac

AC_SUBST([AR])dnl

])

# AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-

# Copyright (C) 2001-2017 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.

# For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets

# $ac_aux_dir to '$srcdir/foo'.  In other projects, it is set to

# '$srcdir', '$srcdir/..', or '$srcdir/../..'.

#

# Of course, Automake must honor this variable whenever it calls a

# tool from the auxiliary directory.  The problem is that $srcdir (and

# therefore $ac_aux_dir as well) can be either absolute or relative,

# depending on how configure is run.  This is pretty annoying, since

# it makes $ac_aux_dir quite unusable in subdirectories: in the top

# source directory, any form will work fine, but in subdirectories a

# relative path needs to be adjusted first.

#

# $ac_aux_dir/missing

#    fails when called from a subdirectory if $ac_aux_dir is relative

# $top_srcdir/$ac_aux_dir/missing

#    fails if $ac_aux_dir is absolute,

#    fails when called from a subdirectory in a VPATH build with

#          a relative $ac_aux_dir

#

# The reason of the latter failure is that $top_srcdir and $ac_aux_dir

# are both prefixed by $srcdir.  In an in-source build this is usually

# harmless because $srcdir is '.', but things will broke when you

# start a VPATH build or use an absolute $srcdir.

#

# So we could use something similar to $top_srcdir/$ac_aux_dir/missing,

# iff we strip the leading $srcdir from $ac_aux_dir.  That would be:

#   am_aux_dir='\$(top_srcdir)/'`expr "$ac_aux_dir" : "$srcdir//*\(.*\)"`

# and then we would define $MISSING as

#   MISSING="\${SHELL} $am_aux_dir/missing"

# This will work as long as MISSING is not called from configure, because

# unfortunately $(top_srcdir) has no meaning in configure.

# However there are other variables, like CC, which are often used in

# configure, and could therefore not use this "fixed" $ac_aux_dir.

#

# Another solution, used here, is to always expand $ac_aux_dir to an

# absolute PATH.  The drawback is that using absolute paths prevent a

# configured tree to be moved without reconfiguration.

AC_DEFUN([AM_AUX_DIR_EXPAND],

[AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl

# Expand $ac_aux_dir to an absolute path.

am_aux_dir=`cd "$ac_aux_dir" && pwd`

])

# AM_CONDITIONAL                                            -*- Autoconf -*-

# Copyright (C) 1997-2017 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.

# AM_CONDITIONAL(NAME, SHELL-CONDITION)

# -------------------------------------

# Define a conditional.

AC_DEFUN([AM_CONDITIONAL],

[AC_PREREQ([2.52])dnl

 m4_if([$1], [TRUE],  [AC_FATAL([$0: invalid condition: $1])],

       [$1], [FALSE], [AC_FATAL([$0: invalid condition: $1])])dnl

AC_SUBST([$1_TRUE])dnl

AC_SUBST([$1_FALSE])dnl

_AM_SUBST_NOTMAKE([$1_TRUE])dnl

_AM_SUBST_NOTMAKE([$1_FALSE])dnl

m4_define([_AM_COND_VALUE_$1], [$2])dnl

if $2; then

  $1_TRUE=

  $1_FALSE='#'

else

  $1_TRUE='#'

  $1_FALSE=

fi

AC_CONFIG_COMMANDS_PRE(

[if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then

  AC_MSG_ERROR([[conditional "$1" was never defined.

Usually this means the macro was only invoked conditionally.]])

fi])])

# Copyright (C) 1999-2017 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.

# There are a few dirty hacks below to avoid letting 'AC_PROG_CC' be

# written in clear, in which case automake, when reading aclocal.m4,

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