aclocal.m4

# generated automatically by aclocal 1.14.1 -*- Autoconf -*-

# Copyright (C) 1996-2013 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'.])])

# ===========================================================================
#    http://www.gnu.org/software/autoconf-archive/ax_compare_version.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_COMPARE_VERSION(VERSION_A, OP, VERSION_B, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
#
# DESCRIPTION
#
#   This macro compares two version strings. Due to the various number of
#   minor-version numbers that can exist, and the fact that string
#   comparisons are not compatible with numeric comparisons, this is not
#   necessarily trivial to do in a autoconf script. This macro makes doing
#   these comparisons easy.
#
#   The six basic comparisons are available, as well as checking equality
#   limited to a certain number of minor-version levels.
#
#   The operator OP determines what type of comparison to do, and can be one
#   of:
#
#    eq  - equal (test A == B)
#    ne  - not equal (test A != B)
#    le  - less than or equal (test A <= B)
#    ge  - greater than or equal (test A >= B)
#    lt  - less than (test A < B)
#    gt  - greater than (test A > B)
#
#   Additionally, the eq and ne operator can have a number after it to limit
#   the test to that number of minor versions.
#
#    eq0 - equal up to the length of the shorter version
#    ne0 - not equal up to the length of the shorter version
#    eqN - equal up to N sub-version levels
#    neN - not equal up to N sub-version levels
#
#   When the condition is true, shell commands ACTION-IF-TRUE are run,
#   otherwise shell commands ACTION-IF-FALSE are run. The environment
#   variable 'ax_compare_version' is always set to either 'true' or 'false'
#   as well.
#
#   Examples:
#
#     AX_COMPARE_VERSION([3.15.7],[lt],[3.15.8])
#     AX_COMPARE_VERSION([3.15],[lt],[3.15.8])
#
#   would both be true.
#
#     AX_COMPARE_VERSION([3.15.7],[eq],[3.15.8])
#     AX_COMPARE_VERSION([3.15],[gt],[3.15.8])
#
#   would both be false.
#
#     AX_COMPARE_VERSION([3.15.7],[eq2],[3.15.8])
#
#   would be true because it is only comparing two minor versions.
#
#     AX_COMPARE_VERSION([3.15.7],[eq0],[3.15])
#
#   would be true because it is only comparing the lesser number of minor
#   versions of the two values.
#
#   Note: The characters that separate the version numbers do not matter. An
#   empty string is the same as version 0. OP is evaluated by autoconf, not
#   configure, so must be a string, not a variable.
#
#   The author would like to acknowledge Guido Draheim whose advice about
#   the m4_case and m4_ifvaln functions make this macro only include the
#   portions necessary to perform the specific comparison specified by the
#   OP argument in the final configure script.
#
# LICENSE
#
#   Copyright (c) 2008 Tim Toolan <toolan@ele.uri.edu>
#
#   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 11

dnl #########################################################################
AC_DEFUN([AX_COMPARE_VERSION], [
  AC_REQUIRE([AC_PROG_AWK])

  # Used to indicate true or false condition
  ax_compare_version=false

  # Convert the two version strings to be compared into a format that
  # allows a simple string comparison.  The end result is that a version
  # string of the form 1.12.5-r617 will be converted to the form
  # 0001001200050617.  In other words, each number is zero padded to four
  # digits, and non digits are removed.
  AS_VAR_PUSHDEF([A],[ax_compare_version_A])
  A=`echo "$1" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
                     -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/[[^0-9]]//g'`

  AS_VAR_PUSHDEF([B],[ax_compare_version_B])
  B=`echo "$3" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
                     -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
                     -e 's/[[^0-9]]//g'`

  dnl # In the case of le, ge, lt, and gt, the strings are sorted as necessary
  dnl # then the first line is used to determine if the condition is true.
  dnl # The sed right after the echo is to remove any indented white space.
  m4_case(m4_tolower($2),
  [lt],[
    ax_compare_version=`echo "x$A
x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/false/;s/x${B}/true/;1q"`
  ],
  [gt],[
    ax_compare_version=`echo "x$A
x$B" | sed 's/^ *//' | sort | sed "s/x${A}/false/;s/x${B}/true/;1q"`
  ],
  [le],[
    ax_compare_version=`echo "x$A
x$B" | sed 's/^ *//' | sort | sed "s/x${A}/true/;s/x${B}/false/;1q"`
  ],
  [ge],[
    ax_compare_version=`echo "x$A
x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/true/;s/x${B}/false/;1q"`
  ],[
    dnl Split the operator from the subversion count if present.
    m4_bmatch(m4_substr($2,2),
    [0],[
      # A count of zero means use the length of the shorter version.
      # Determine the number of characters in A and B.
      ax_compare_version_len_A=`echo "$A" | $AWK '{print(length)}'`
      ax_compare_version_len_B=`echo "$B" | $AWK '{print(length)}'`

      # Set A to no more than B's length and B to no more than A's length.
      A=`echo "$A" | sed "s/\(.\{$ax_compare_version_len_B\}\).*/\1/"`
      B=`echo "$B" | sed "s/\(.\{$ax_compare_version_len_A\}\).*/\1/"`
    ],
    [[0-9]+],[
      # A count greater than zero means use only that many subversions
      A=`echo "$A" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
      B=`echo "$B" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
    ],
    [.+],[
      AC_WARNING(
        [illegal OP numeric parameter: $2])
    ],[])

    # Pad zeros at end of numbers to make same length.
    ax_compare_version_tmp_A="$A`echo $B | sed 's/./0/g'`"
    B="$B`echo $A | sed 's/./0/g'`"
    A="$ax_compare_version_tmp_A"

    # Check for equality or inequality as necessary.
    m4_case(m4_tolower(m4_substr($2,0,2)),
    [eq],[
      test "x$A" = "x$B" && ax_compare_version=true
    ],
    [ne],[
      test "x$A" != "x$B" && ax_compare_version=true
    ],[
      AC_WARNING([illegal OP parameter: $2])
    ])
  ])

  AS_VAR_POPDEF([A])dnl
  AS_VAR_POPDEF([B])dnl

  dnl # Execute ACTION-IF-TRUE / ACTION-IF-FALSE.
  if test "$ax_compare_version" = "true" ; then
    m4_ifvaln([$4],[$4],[:])dnl
    m4_ifvaln([$5],[else $5])dnl
  fi
]) dnl AX_COMPARE_VERSION

# ===========================================================================
#          http://www.gnu.org/software/autoconf-archive/ax_lua.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_PROG_LUA[([MINIMUM-VERSION], [TOO-BIG-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])]
#   AX_LUA_HEADERS[([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])]
#   AX_LUA_LIBS[([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])]
#   AX_LUA_READLINE[([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])]
#
# DESCRIPTION
#
#   Detect a Lua interpreter, optionally specifying a minimum and maximum
#   version number. Set up important Lua paths, such as the directories in
#   which to install scripts and modules (shared libraries).
#
#   Also detect Lua headers and libraries. The Lua version contained in the
#   header is checked to match the Lua interpreter version exactly. When
#   searching for Lua libraries, the version number is used as a suffix.
#   This is done with the goal of supporting multiple Lua installs (5.1 and
#   5.2 side-by-side).
#
#   A note on compatibility with previous versions: This file has been
#   mostly rewritten for serial 18. Most developers should be able to use
#   these macros without needing to modify configure.ac. Care has been taken
#   to preserve each macro's behavior, but there are some differences:
#
#   1) AX_WITH_LUA is deprecated; it now expands to the exact same thing as
#   AX_PROG_LUA with no arguments.
#
#   2) AX_LUA_HEADERS now checks that the version number defined in lua.h
#   matches the interpreter version. AX_LUA_HEADERS_VERSION is therefore
#   unnecessary, so it is deprecated and does not expand to anything.
#
#   3) The configure flag --with-lua-suffix no longer exists; the user
#   should instead specify the LUA precious variable on the command line.
#   See the AX_PROG_LUA description for details.
#
#   Please read the macro descriptions below for more information.
#
#   This file was inspired by Andrew Dalke's and James Henstridge's
#   python.m4 and Tom Payne's, Matthieu Moy's, and Reuben Thomas's ax_lua.m4
#   (serial 17). Basically, this file is a mash-up of those two files. I
#   like to think it combines the best of the two!
#
#   AX_PROG_LUA: Search for the Lua interpreter, and set up important Lua
#   paths. Adds precious variable LUA, which may contain the path of the Lua
#   interpreter. If LUA is blank, the user's path is searched for an
#   suitable interpreter.
#
#   If MINIMUM-VERSION is supplied, then only Lua interpreters with a
#   version number greater or equal to MINIMUM-VERSION will be accepted. If
#   TOO-BIG- VERSION is also supplied, then only Lua interpreters with a
#   version number greater or equal to MINIMUM-VERSION and less than
#   TOO-BIG-VERSION will be accepted.
#
#   Version comparisons require the AX_COMPARE_VERSION macro, which is
#   provided by ax_compare_version.m4 from the Autoconf Archive.
#
#   The Lua version number, LUA_VERSION, is found from the interpreter, and
#   substituted. LUA_PLATFORM is also found, but not currently supported (no
#   standard representation).
#
#   Finally, the macro finds four paths:
#
#     luadir             Directory to install Lua scripts.
#     pkgluadir          $luadir/$PACKAGE
#     luaexecdir         Directory to install Lua modules.
#     pkgluaexecdir      $luaexecdir/$PACKAGE
#
#   These paths a found based on $prefix, $exec_prefix, Lua's package.path,
#   and package.cpath. The first path of package.path beginning with $prefix
#   is selected as luadir. The first path of package.cpath beginning with
#   $exec_prefix is used as luaexecdir. This should work on all reasonable
#   Lua installations. If a path cannot be determined, a default path is
#   used. Of course, the user can override these later when invoking make.
#
#     luadir             Default: $prefix/share/lua/$LUA_VERSION
#     luaexecdir         Default: $exec_prefix/lib/lua/$LUA_VERSION
#
#   These directories can be used by Automake as install destinations. The
#   variable name minus 'dir' needs to be used as a prefix to the
#   appropriate Automake primary, e.g. lua_SCRIPS or luaexec_LIBRARIES.
#
#   If an acceptable Lua interpreter is found, then ACTION-IF-FOUND is
#   performed, otherwise ACTION-IF-NOT-FOUND is preformed. If ACTION-IF-NOT-
#   FOUND is blank, then it will default to printing an error. To prevent
#   the default behavior, give ':' as an action.
#
#   AX_LUA_HEADERS: Search for Lua headers. Requires that AX_PROG_LUA be
#   expanded before this macro. Adds precious variable LUA_INCLUDE, which
#   may contain Lua specific include flags, e.g. -I/usr/include/lua5.1. If
#   LUA_INCLUDE is blank, then this macro will attempt to find suitable
#   flags.
#
#   LUA_INCLUDE can be used by Automake to compile Lua modules or
#   executables with embedded interpreters. The *_CPPFLAGS variables should
#   be used for this purpose, e.g. myprog_CPPFLAGS = $(LUA_INCLUDE).
#
#   This macro searches for the header lua.h (and others). The search is
#   performed with a combination of CPPFLAGS, CPATH, etc, and LUA_INCLUDE.
#   If the search is unsuccessful, then some common directories are tried.
#   If the headers are then found, then LUA_INCLUDE is set accordingly.
#
#   The paths automatically searched are:
#
#     * /usr/include/luaX.Y
#     * /usr/include/lua/X.Y
#     * /usr/include/luaXY
#     * /usr/local/include/luaX.Y
#     * /usr/local/include/lua/X.Y
#     * /usr/local/include/luaXY
#
#   (Where X.Y is the Lua version number, e.g. 5.1.)
#
#   The Lua version number found in the headers is always checked to match
#   the Lua interpreter's version number. Lua headers with mismatched
#   version numbers are not accepted.
#
#   If headers are found, then ACTION-IF-FOUND is performed, otherwise
#   ACTION-IF-NOT-FOUND is performed. If ACTION-IF-NOT-FOUND is blank, then
#   it will default to printing an error. To prevent the default behavior,
#   set the action to ':'.
#
#   AX_LUA_LIBS: Search for Lua libraries. Requires that AX_PROG_LUA be
#   expanded before this macro. Adds precious variable LUA_LIB, which may
#   contain Lua specific linker flags, e.g. -llua5.1. If LUA_LIB is blank,
#   then this macro will attempt to find suitable flags.
#
#   LUA_LIB can be used by Automake to link Lua modules or executables with
#   embedded interpreters. The *_LIBADD and *_LDADD variables should be used
#   for this purpose, e.g. mymod_LIBADD = $(LUA_LIB).
#
#   This macro searches for the Lua library. More technically, it searches
#   for a library containing the function lua_load. The search is performed
#   with a combination of LIBS, LIBRARY_PATH, and LUA_LIB.
#
#   If the search determines that some linker flags are missing, then those
#   flags will be added to LUA_LIB.
#
#   If libraries are found, then ACTION-IF-FOUND is performed, otherwise
#   ACTION-IF-NOT-FOUND is performed. If ACTION-IF-NOT-FOUND is blank, then
#   it will default to printing an error. To prevent the default behavior,
#   set the action to ':'.
#
#   AX_LUA_READLINE: Search for readline headers and libraries. Requires the
#   AX_LIB_READLINE macro, which is provided by ax_lib_readline.m4 from the
#   Autoconf Archive.
#
#   If a readline compatible library is found, then ACTION-IF-FOUND is
#   performed, otherwise ACTION-IF-NOT-FOUND is performed.
#
# LICENSE
#
#   Copyright (c) 2013 Tim Perkins <tprk77@gmail.com>
#   Copyright (c) 2013 Reuben Thomas <rrt@sc3d.org>
#
#   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 20

dnl =========================================================================
dnl AX_PROG_LUA([MINIMUM-VERSION], [TOO-BIG-VERSION],
dnl             [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl =========================================================================
AC_DEFUN([AX_PROG_LUA],
[
  dnl Make LUA a precious variable.
  AC_ARG_VAR([LUA], [The Lua interpreter, e.g. /usr/bin/lua5.1])

  dnl Find a Lua interpreter.
  m4_define_default([_AX_LUA_INTERPRETER_LIST],
    [lua lua5.2 lua5.1 lua50])

  m4_if([$1], [],
  [ dnl No version check is needed. Find any Lua interpreter.
    AS_IF([test "x$LUA" = 'x'],
      [AC_PATH_PROGS([LUA], [_AX_LUA_INTERPRETER_LIST], [:])])
    ax_display_LUA='lua'

    dnl At least check if this is a Lua interpreter.
    AC_MSG_CHECKING([if $LUA is a Lua interpreter])
    _AX_LUA_CHK_IS_INTRP([$LUA],
      [AC_MSG_RESULT([yes])],
      [ AC_MSG_RESULT([no])
        AC_MSG_ERROR([not a Lua interpreter])
      ])
  ],
  [ dnl A version check is needed.
    AS_IF([test "x$LUA" != 'x'],
    [ dnl Check if this is a Lua interpreter.
      AC_MSG_CHECKING([if $LUA is a Lua interpreter])
      _AX_LUA_CHK_IS_INTRP([$LUA],
        [AC_MSG_RESULT([yes])],
        [ AC_MSG_RESULT([no])
          AC_MSG_ERROR([not a Lua interpreter])
        ])
      dnl Check the version.
      m4_if([$2], [],
        [_ax_check_text="whether $LUA version >= $1"],
        [_ax_check_text="whether $LUA version >= $1, < $2"])
      AC_MSG_CHECKING([$_ax_check_text])
      _AX_LUA_CHK_VER([$LUA], [$1], [$2],
        [AC_MSG_RESULT([yes])],
        [ AC_MSG_RESULT([no])
          AC_MSG_ERROR([version is out of range for specified LUA])])
      ax_display_LUA=$LUA
    ],
    [ dnl Try each interpreter until we find one that satisfies VERSION.
      m4_if([$2], [],
        [_ax_check_text="for a Lua interpreter with version >= $1"],
        [_ax_check_text="for a Lua interpreter with version >= $1, < $2"])
      AC_CACHE_CHECK([$_ax_check_text],
        [ax_cv_pathless_LUA],
        [ for ax_cv_pathless_LUA in _AX_LUA_INTERPRETER_LIST none; do
            test "x$ax_cv_pathless_LUA" = 'xnone' && break
            _AX_LUA_CHK_IS_INTRP([$ax_cv_pathless_LUA], [], [continue])
            _AX_LUA_CHK_VER([$ax_cv_pathless_LUA], [$1], [$2], [break])
          done
        ])
      dnl Set $LUA to the absolute path of $ax_cv_pathless_LUA.
      AS_IF([test "x$ax_cv_pathless_LUA" = 'xnone'],
        [LUA=':'],
        [AC_PATH_PROG([LUA], [$ax_cv_pathless_LUA])])
      ax_display_LUA=$ax_cv_pathless_LUA
    ])
  ])

  AS_IF([test "x$LUA" = 'x:'],
  [ dnl Run any user-specified action, or abort.
    m4_default([$4], [AC_MSG_ERROR([cannot find suitable Lua interpreter])])
  ],
  [ dnl Query Lua for its version number.
    AC_CACHE_CHECK([for $ax_display_LUA version], [ax_cv_lua_version],
      [ ax_cv_lua_version=`$LUA -e "print(_VERSION)" | \
          sed "s|^Lua \(.*\)|\1|" | \
          grep -o "^@<:@0-9@:>@\+\\.@<:@0-9@:>@\+"`
      ])
    AS_IF([test "x$ax_cv_lua_version" = 'x'],
      [AC_MSG_ERROR([invalid Lua version number])])
    AC_SUBST([LUA_VERSION], [$ax_cv_lua_version])
    AC_SUBST([LUA_SHORT_VERSION], [`echo "$LUA_VERSION" | sed 's|\.||'`])

    dnl The following check is not supported:
    dnl At times (like when building shared libraries) you may want to know
    dnl which OS platform Lua thinks this is.
    AC_CACHE_CHECK([for $ax_display_LUA platform], [ax_cv_lua_platform],
      [ax_cv_lua_platform=`$LUA -e "print('unknown')"`])
    AC_SUBST([LUA_PLATFORM], [$ax_cv_lua_platform])

    dnl Use the values of $prefix and $exec_prefix for the corresponding
    dnl values of LUA_PREFIX and LUA_EXEC_PREFIX. These are made distinct
    dnl variables so they can be overridden if need be. However, the general
    dnl consensus is that you shouldn't need this ability.
    AC_SUBST([LUA_PREFIX], ['${prefix}'])
    AC_SUBST([LUA_EXEC_PREFIX], ['${exec_prefix}'])

    dnl Lua provides no way to query the script directory, and instead
    dnl provides LUA_PATH. However, we should be able to make a safe educated
    dnl guess. If the built-in search path contains a directory which is
    dnl prefixed by $prefix, then we can store scripts there. The first
    dnl matching path will be used.
    AC_CACHE_CHECK([for $ax_display_LUA script directory],
      [ax_cv_lua_luadir],
      [ AS_IF([test "x$prefix" = 'xNONE'],
          [ax_lua_prefix=$ac_default_prefix],
          [ax_lua_prefix=$prefix])

        dnl Initialize to the default path.
        ax_cv_lua_luadir="$LUA_PREFIX/share/lua/$LUA_VERSION"

        dnl Try to find a path with the prefix.
        _AX_LUA_FND_PRFX_PTH([$LUA], [$ax_lua_prefix], [package.path])
        AS_IF([test "x$ax_lua_prefixed_path" != 'x'],
        [ dnl Fix the prefix.
          _ax_strip_prefix=`echo "$ax_lua_prefix" | sed 's|.|.|g'`
          ax_cv_lua_luadir=`echo "$ax_lua_prefixed_path" | \
            sed "s,^$_ax_strip_prefix,$LUA_PREFIX,"`
        ])
      ])
    AC_SUBST([luadir], [$ax_cv_lua_luadir])
    AC_SUBST([pkgluadir], [\${luadir}/$PACKAGE])

    dnl Lua provides no way to query the module directory, and instead
    dnl provides LUA_PATH. However, we should be able to make a safe educated
    dnl guess. If the built-in search path contains a directory which is
    dnl prefixed by $exec_prefix, then we can store modules there. The first
    dnl matching path will be used.
    AC_CACHE_CHECK([for $ax_display_LUA module directory],
      [ax_cv_lua_luaexecdir],
      [ AS_IF([test "x$exec_prefix" = 'xNONE'],
          [ax_lua_exec_prefix=$ax_lua_prefix],
          [ax_lua_exec_prefix=$exec_prefix])

        dnl Initialize to the default path.
        ax_cv_lua_luaexecdir="$LUA_EXEC_PREFIX/lib/lua/$LUA_VERSION"

        dnl Try to find a path with the prefix.
        _AX_LUA_FND_PRFX_PTH([$LUA],
          [$ax_lua_exec_prefix], [package.cpathd])
        AS_IF([test "x$ax_lua_prefixed_path" != 'x'],
        [ dnl Fix the prefix.
          _ax_strip_prefix=`echo "$ax_lua_exec_prefix" | sed 's|.|.|g'`
          ax_cv_lua_luaexecdir=`echo "$ax_lua_prefixed_path" | \
            sed "s,^$_ax_strip_prefix,$LUA_EXEC_PREFIX,"`
        ])
      ])
    AC_SUBST([luaexecdir], [$ax_cv_lua_luaexecdir])
    AC_SUBST([pkgluaexecdir], [\${luaexecdir}/$PACKAGE])

    dnl Run any user specified action.
    $3
  ])
])

dnl AX_WITH_LUA is now the same thing as AX_PROG_LUA.
AC_DEFUN([AX_WITH_LUA],
[
  AC_MSG_WARN([[$0 is deprecated, please use AX_PROG_LUA]])
  AX_PROG_LUA
])


dnl =========================================================================
dnl _AX_LUA_CHK_IS_INTRP(PROG, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
dnl =========================================================================
AC_DEFUN([_AX_LUA_CHK_IS_INTRP],
[
  dnl Just print _VERSION because all Lua interpreters have this global.
  AS_IF([$1 -e "print('Hello ' .. _VERSION .. '!')" &>/dev/null],
    [$2], [$3])
])


dnl =========================================================================
dnl _AX_LUA_CHK_VER(PROG, MINIMUM-VERSION, [TOO-BIG-VERSION],
dnl                 [ACTION-IF-TRUE], [ACTION-IF-FALSE])
dnl =========================================================================
AC_DEFUN([_AX_LUA_CHK_VER],
[
  _ax_test_ver=`$1 -e "print(_VERSION)" 2>/dev/null | \
    sed "s|^Lua \(.*\)|\1|" | grep -o "^@<:@0-9@:>@\+\\.@<:@0-9@:>@\+"`
  AS_IF([test "x$_ax_test_ver" = 'x'],
    [_ax_test_ver='0'])
  AX_COMPARE_VERSION([$_ax_test_ver], [ge], [$2])
  m4_if([$3], [], [],
    [ AS_IF([$ax_compare_version],
        [AX_COMPARE_VERSION([$_ax_test_ver], [lt], [$3])])
    ])
  AS_IF([$ax_compare_version], [$4], [$5])
])


dnl =========================================================================
dnl _AX_LUA_FND_PRFX_PTH(PROG, PREFIX, LUA-PATH-VARIABLE)
dnl =========================================================================
AC_DEFUN([_AX_LUA_FND_PRFX_PTH],
[
  dnl Invokes the Lua interpreter PROG to print the path variable
  dnl LUA-PATH-VARIABLE, usually package.path or package.cpath. Paths are
  dnl then matched against PREFIX. The first path to begin with PREFIX is set
  dnl to ax_lua_prefixed_path.

  ax_lua_prefixed_path=''
  _ax_package_paths=`$1 -e 'print($3)' 2>/dev/null | sed 's|;|\n|g'`
  dnl Try the paths in order, looking for the prefix.
  for _ax_package_path in $_ax_package_paths; do
    dnl Copy the path, up to the use of a Lua wildcard.
    _ax_path_parts=`echo "$_ax_package_path" | sed 's|/|\n|g'`
    _ax_reassembled=''
    for _ax_path_part in $_ax_path_parts; do
      echo "$_ax_path_part" | grep '\?' >/dev/null && break
      _ax_reassembled="$_ax_reassembled/$_ax_path_part"
    done
    dnl Check the path against the prefix.
    _ax_package_path=$_ax_reassembled
    if echo "$_ax_package_path" | grep "^$2" >/dev/null; then
      dnl Found it.
      ax_lua_prefixed_path=$_ax_package_path
      break
    fi
  done
])


dnl =========================================================================
dnl AX_LUA_HEADERS([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl =========================================================================
AC_DEFUN([AX_LUA_HEADERS],
[
  dnl Check for LUA_VERSION.
  AC_MSG_CHECKING([if LUA_VERSION is defined])
  AS_IF([test "x$LUA_VERSION" != 'x'],
    [AC_MSG_RESULT([yes])],
    [ AC_MSG_RESULT([no])
      AC_MSG_ERROR([cannot check Lua headers without knowing LUA_VERSION])
    ])

  dnl Make LUA_INCLUDE a precious variable.
  AC_ARG_VAR([LUA_INCLUDE], [The Lua includes, e.g. -I/usr/include/lua5.1])

  dnl Some default directories to search.
  LUA_SHORT_VERSION=`echo "$LUA_VERSION" | sed 's|\.||'`
  m4_define_default([_AX_LUA_INCLUDE_LIST],
    [ /usr/include/lua$LUA_VERSION \
      /usr/include/lua/$LUA_VERSION \
      /usr/include/lua$LUA_SHORT_VERSION \
      /usr/local/include/lua$LUA_VERSION \
      /usr/local/include/lua/$LUA_VERSION \
      /usr/local/include/lua$LUA_SHORT_VERSION \
    ])

  dnl Try to find the headers.
  _ax_lua_saved_cppflags=$CPPFLAGS
  CPPFLAGS="$CPPFLAGS $LUA_INCLUDE"
  AC_CHECK_HEADERS([lua.h lualib.h lauxlib.h luaconf.h])
  CPPFLAGS=$_ax_lua_saved_cppflags

  dnl Try some other directories if LUA_INCLUDE was not set.
  AS_IF([test "x$LUA_INCLUDE" = 'x' &&
         test "x$ac_cv_header_lua_h" != 'xyes'],
    [ dnl Try some common include paths.
      for _ax_include_path in _AX_LUA_INCLUDE_LIST; do
        test ! -d "$_ax_include_path" && continue

        AC_MSG_CHECKING([for Lua headers in])
        AC_MSG_RESULT([$_ax_include_path])

        AS_UNSET([ac_cv_header_lua_h])
        AS_UNSET([ac_cv_header_lualib_h])
        AS_UNSET([ac_cv_header_lauxlib_h])
        AS_UNSET([ac_cv_header_luaconf_h])

        _ax_lua_saved_cppflags=$CPPFLAGS
        CPPFLAGS="$CPPFLAGS -I$_ax_include_path"
        AC_CHECK_HEADERS([lua.h lualib.h lauxlib.h luaconf.h])
        CPPFLAGS=$_ax_lua_saved_cppflags

        AS_IF([test "x$ac_cv_header_lua_h" = 'xyes'],
          [ LUA_INCLUDE="-I$_ax_include_path"
            break
          ])
      done
    ])

  AS_IF([test "x$ac_cv_header_lua_h" = 'xyes'],
    [ dnl Make a program to print LUA_VERSION defined in the header.
      dnl TODO This probably shouldn't be a runtime test.

      AC_CACHE_CHECK([for Lua header version],
        [ax_cv_lua_header_version],
        [ _ax_lua_saved_cppflags=$CPPFLAGS
          CPPFLAGS="$CPPFLAGS $LUA_INCLUDE"
          AC_RUN_IFELSE(
            [ AC_LANG_SOURCE([[
#include <lua.h>
#include <stdlib.h>
#include <stdio.h>
int main(int argc, char ** argv)
{
  if(argc > 1) printf("%s", LUA_VERSION);
  exit(EXIT_SUCCESS);
}
]])
            ],
            [ ax_cv_lua_header_version=`./conftest$EXEEXT p | \
                sed "s|^Lua \(.*\)|\1|" | \
                grep -o "^@<:@0-9@:>@\+\\.@<:@0-9@:>@\+"`
            ],
            [ax_cv_lua_header_version='unknown'])
          CPPFLAGS=$_ax_lua_saved_cppflags
        ])

      dnl Compare this to the previously found LUA_VERSION.
      AC_MSG_CHECKING([if Lua header version matches $LUA_VERSION])
      AS_IF([test "x$ax_cv_lua_header_version" = "x$LUA_VERSION"],
        [ AC_MSG_RESULT([yes])
          ax_header_version_match='yes'
        ],
        [ AC_MSG_RESULT([no])
          ax_header_version_match='no'
        ])
    ])

  dnl Was LUA_INCLUDE specified?
  AS_IF([test "x$ax_header_version_match" != 'xyes' &&
         test "x$LUA_INCLUDE" != 'x'],
    [AC_MSG_ERROR([cannot find headers for specified LUA_INCLUDE])])

  dnl Test the final result and run user code.
  AS_IF([test "x$ax_header_version_match" = 'xyes'], [$1],
    [m4_default([$2], [AC_MSG_ERROR([cannot find Lua includes])])])
])

dnl AX_LUA_HEADERS_VERSION no longer exists, use AX_LUA_HEADERS.
AC_DEFUN([AX_LUA_HEADERS_VERSION],
[
  AC_MSG_WARN([[$0 is deprecated, please use AX_LUA_HEADERS]])
])


dnl =========================================================================
dnl AX_LUA_LIBS([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl =========================================================================
AC_DEFUN([AX_LUA_LIBS],
[
  dnl TODO Should this macro also check various -L flags?

  dnl Check for LUA_VERSION.
  AC_MSG_CHECKING([if LUA_VERSION is defined])
  AS_IF([test "x$LUA_VERSION" != 'x'],
    [AC_MSG_RESULT([yes])],
    [ AC_MSG_RESULT([no])
      AC_MSG_ERROR([cannot check Lua libs without knowing LUA_VERSION])
    ])

  dnl Make LUA_LIB a precious variable.
  AC_ARG_VAR([LUA_LIB], [The Lua library, e.g. -llua5.1])

  AS_IF([test "x$LUA_LIB" != 'x'],
  [ dnl Check that LUA_LIBS works.
    _ax_lua_saved_libs=$LIBS
    LIBS="$LIBS $LUA_LIB"
    AC_SEARCH_LIBS([lua_load], [],
      [_ax_found_lua_libs='yes'],
      [_ax_found_lua_libs='no'])
    LIBS=$_ax_lua_saved_libs

    dnl Check the result.
    AS_IF([test "x$_ax_found_lua_libs" != 'xyes'],
      [AC_MSG_ERROR([cannot find libs for specified LUA_LIB])])
  ],
  [ dnl First search for extra libs.
    _ax_lua_extra_libs=''

    _ax_lua_saved_libs=$LIBS
    LIBS="$LIBS $LUA_LIB"
    AC_SEARCH_LIBS([exp], [m])
    AC_SEARCH_LIBS([dlopen], [dl])
    LIBS=$_ax_lua_saved_libs

    AS_IF([test "x$ac_cv_search_exp" != 'xno' &&
           test "x$ac_cv_search_exp" != 'xnone required'],
      [_ax_lua_extra_libs="$_ax_lua_extra_libs $ac_cv_search_exp"])

    AS_IF([test "x$ac_cv_search_dlopen" != 'xno' &&
           test "x$ac_cv_search_dlopen" != 'xnone required'],
      [_ax_lua_extra_libs="$_ax_lua_extra_libs $ac_cv_search_dlopen"])

    dnl Try to find the Lua libs.
    _ax_lua_saved_libs=$LIBS
    LIBS="$LIBS $LUA_LIB"
    AC_SEARCH_LIBS([lua_load], [lua$LUA_VERSION lua$LUA_SHORT_VERSION lua],
      [_ax_found_lua_libs='yes'],
      [_ax_found_lua_libs='no'],
      [$_ax_lua_extra_libs])
    LIBS=$_ax_lua_saved_libs

    AS_IF([test "x$ac_cv_search_lua_load" != 'xno' &&
           test "x$ac_cv_search_lua_load" != 'xnone required'],
      [LUA_LIB="$ac_cv_search_lua_load $_ax_lua_extra_libs"])
  ])

  dnl Test the result and run user code.
  AS_IF([test "x$_ax_found_lua_libs" = 'xyes'], [$1],
    [m4_default([$2], [AC_MSG_ERROR([cannot find Lua libs])])])
])


dnl =========================================================================
dnl AX_LUA_READLINE([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
dnl =========================================================================
AC_DEFUN([AX_LUA_READLINE],
[
  AX_LIB_READLINE
  AS_IF([test "x$ac_cv_header_readline_readline_h" != 'x' &&
         test "x$ac_cv_header_readline_history_h" != 'x'],
    [ LUA_LIBS_CFLAGS="-DLUA_USE_READLINE $LUA_LIBS_CFLAGS"
      $1
    ],
    [$2])
])

# ===========================================================================
#       http://www.gnu.org/software/autoconf-archive/ax_with_prog.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_WITH_PROG([VARIABLE],[program],[VALUE-IF-NOT-FOUND],[PATH])
#
# DESCRIPTION
#
#   Locates an installed program binary, placing the result in the precious
#   variable VARIABLE. Accepts a present VARIABLE, then --with-program, and
#   failing that searches for program in the given path (which defaults to
#   the system path). If program is found, VARIABLE is set to the full path
#   of the binary; if it is not found VARIABLE is set to VALUE-IF-NOT-FOUND
#   if provided, unchanged otherwise.
#
#   A typical example could be the following one:
#
#     AX_WITH_PROG(PERL,perl)
#
#   NOTE: This macro is based upon the original AX_WITH_PYTHON macro from
#   Dustin J. Mitchell <dustin@cs.uchicago.edu>.
#
# LICENSE
#
#   Copyright (c) 2008 Francesco Salvestrini <salvestrini@users.sourceforge.net>
#   Copyright (c) 2008 Dustin J. Mitchell <dustin@cs.uchicago.edu>
#
#   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 16

AC_DEFUN([AX_WITH_PROG],[
    AC_PREREQ([2.61])

    pushdef([VARIABLE],$1)
    pushdef([EXECUTABLE],$2)
    pushdef([VALUE_IF_NOT_FOUND],$3)
    pushdef([PATH_PROG],$4)

    AC_ARG_VAR(VARIABLE,Absolute path to EXECUTABLE executable)

    AS_IF(test -z "$VARIABLE",[
        AC_MSG_CHECKING(whether EXECUTABLE executable path has been provided)
        AC_ARG_WITH(EXECUTABLE,AS_HELP_STRING([--with-EXECUTABLE=[[[PATH]]]],absolute path to EXECUTABLE executable), [
            AS_IF([test "$withval" != yes && test "$withval" != no],[
                VARIABLE="$withval"
                AC_MSG_RESULT($VARIABLE)
            ],[
                VARIABLE=""
                AC_MSG_RESULT([no])
                AS_IF([test "$withval" != no], [
                  AC_PATH_PROG([]VARIABLE[],[]EXECUTABLE[],[]VALUE_IF_NOT_FOUND[],[]PATH_PROG[])
                ])
            ])
        ],[
            AC_MSG_RESULT([no])
            AC_PATH_PROG([]VARIABLE[],[]EXECUTABLE[],[]VALUE_IF_NOT_FOUND[],[]PATH_PROG[])
        ])
    ])

    popdef([PATH_PROG])
    popdef([VALUE_IF_NOT_FOUND])
    popdef([EXECUTABLE])
    popdef([VARIABLE])
])

# Configure paths for LIBXML2
# Mike Hommey 2004-06-19
# use CPPFLAGS instead of CFLAGS
# Toshio Kuratomi 2001-04-21
# Adapted from:
# Configure paths for GLIB
# Owen Taylor     97-11-3

dnl AM_PATH_XML2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for XML, and define XML_CPPFLAGS and XML_LIBS
dnl
AC_DEFUN([AM_PATH_XML2],[ 
AC_ARG_WITH(xml-prefix,
            [  --with-xml-prefix=PFX   Prefix where libxml is installed (optional)],
            xml_config_prefix="$withval", xml_config_prefix="")
AC_ARG_WITH(xml-exec-prefix,
            [  --with-xml-exec-prefix=PFX Exec prefix where libxml is installed (optional)],
            xml_config_exec_prefix="$withval", xml_config_exec_prefix="")
AC_ARG_ENABLE(xmltest,
              [  --disable-xmltest       Do not try to compile and run a test LIBXML program],,
              enable_xmltest=yes)

  if test x$xml_config_exec_prefix != x ; then
     xml_config_args="$xml_config_args"
     if test x${XML2_CONFIG+set} != xset ; then
        XML2_CONFIG=$xml_config_exec_prefix/bin/xml2-config
     fi
  fi
  if test x$xml_config_prefix != x ; then
     xml_config_args="$xml_config_args --prefix=$xml_config_prefix"
     if test x${XML2_CONFIG+set} != xset ; then
        XML2_CONFIG=$xml_config_prefix/bin/xml2-config
     fi
  fi

  AC_PATH_PROG(XML2_CONFIG, xml2-config, no)
  min_xml_version=ifelse([$1], ,2.0.0,[$1])
  AC_MSG_CHECKING(for libxml - version >= $min_xml_version)
  no_xml=""
  if test "$XML2_CONFIG" = "no" ; then
    no_xml=yes
  else
    XML_CPPFLAGS=`$XML2_CONFIG $xml_config_args --cflags`
    XML_LIBS=`$XML2_CONFIG $xml_config_args --libs`
    xml_config_major_version=`$XML2_CONFIG $xml_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
    xml_config_minor_version=`$XML2_CONFIG $xml_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
    xml_config_micro_version=`$XML2_CONFIG $xml_config_args --version | \
           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
    if test "x$enable_xmltest" = "xyes" ; then
      ac_save_CPPFLAGS="$CPPFLAGS"
      ac_save_LIBS="$LIBS"
      CPPFLAGS="$CPPFLAGS $XML_CPPFLAGS"
      LIBS="$XML_LIBS $LIBS"
dnl
dnl Now check if the installed libxml is sufficiently new.
dnl (Also sanity checks the results of xml2-config to some extent)
dnl
      rm -f conf.xmltest
      AC_TRY_RUN([
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <libxml/xmlversion.h>

int 
main()
{
  int xml_major_version, xml_minor_version, xml_micro_version;
  int major, minor, micro;
  char *tmp_version;

  system("touch conf.xmltest");

  /* Capture xml2-config output via autoconf/configure variables */
  /* HP/UX 9 (%@#!) writes to sscanf strings */
  tmp_version = (char *)strdup("$min_xml_version");
  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
     printf("%s, bad version string from xml2-config\n", "$min_xml_version");
     exit(1);
   }
   free(tmp_version);

   /* Capture the version information from the header files */
   tmp_version = (char *)strdup(LIBXML_DOTTED_VERSION);
   if (sscanf(tmp_version, "%d.%d.%d", &xml_major_version, &xml_minor_version, &xml_micro_version) != 3) {
     printf("%s, bad version string from libxml includes\n", "LIBXML_DOTTED_VERSION");
     exit(1);
   }
   free(tmp_version);

 /* Compare xml2-config output to the libxml headers */
  if ((xml_major_version != $xml_config_major_version) ||
      (xml_minor_version != $xml_config_minor_version) ||
      (xml_micro_version != $xml_config_micro_version))
    {
      printf("*** libxml header files (version %d.%d.%d) do not match\n",
         xml_major_version, xml_minor_version, xml_micro_version);
      printf("*** xml2-config (version %d.%d.%d)\n",
         $xml_config_major_version, $xml_config_minor_version, $xml_config_micro_version);
      return 1;
    } 
/* Compare the headers to the library to make sure we match */
  /* Less than ideal -- doesn't provide us with return value feedback, 
   * only exits if there's a serious mismatch between header and library.
   */
    LIBXML_TEST_VERSION;

    /* Test that the library is greater than our minimum version */
    if ((xml_major_version > major) ||
        ((xml_major_version == major) && (xml_minor_version > minor)) ||
        ((xml_major_version == major) && (xml_minor_version == minor) &&
        (xml_micro_version >= micro)))
      {
        return 0;
       }
     else
      {
        printf("\n*** An old version of libxml (%d.%d.%d) was found.\n",
               xml_major_version, xml_minor_version, xml_micro_version);
        printf("*** You need a version of libxml newer than %d.%d.%d. The latest version of\n",
           major, minor, micro);
        printf("*** libxml is always available from ftp://ftp.xmlsoft.org.\n");
        printf("***\n");
        printf("*** If you have already installed a sufficiently new version, this error\n");
        printf("*** probably means that the wrong copy of the xml2-config shell script is\n");
        printf("*** being found. The easiest way to fix this is to remove the old version\n");
        printf("*** of LIBXML, but you can also set the XML2_CONFIG environment to point to the\n");
        printf("*** correct copy of xml2-config. (In this case, you will have to\n");
        printf("*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n");
        printf("*** so that the correct libraries are found at run-time))\n");
    }
  return 1;
}
],, no_xml=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
       CPPFLAGS="$ac_save_CPPFLAGS"
       LIBS="$ac_save_LIBS"
     fi
  fi

  if test "x$no_xml" = x ; then
     AC_MSG_RESULT(yes (version $xml_config_major_version.$xml_config_minor_version.$xml_config_micro_version))
     ifelse([$2], , :, [$2])     
  else
     AC_MSG_RESULT(no)
     if test "$XML2_CONFIG" = "no" ; then
       echo "*** The xml2-config script installed by LIBXML could not be found"
       echo "*** If libxml was installed in PREFIX, make sure PREFIX/bin is in"
       echo "*** your path, or set the XML2_CONFIG environment variable to the"
       echo "*** full path to xml2-config."
     else
       if test -f conf.xmltest ; then
        :
       else
          echo "*** Could not run libxml test program, checking why..."
          CPPFLAGS="$CPPFLAGS $XML_CPPFLAGS"
          LIBS="$LIBS $XML_LIBS"
          AC_TRY_LINK([
#include <libxml/xmlversion.h>
#include <stdio.h>
],      [ LIBXML_TEST_VERSION; return 0;],
        [ echo "*** The test program compiled, but did not run. This usually means"
          echo "*** that the run-time linker is not finding LIBXML or finding the wrong"
          echo "*** version of LIBXML. If it is not finding LIBXML, you'll need to set your"
          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
          echo "*** is required on your system"
          echo "***"
          echo "*** If you have an old version installed, it is best to remove it, although"
          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH" ],
        [ echo "*** The test program failed to compile or link. See the file config.log for the"
          echo "*** exact error that occured. This usually means LIBXML was incorrectly installed"
          echo "*** or that you have moved LIBXML since it was installed. In the latter case, you"
          echo "*** may want to edit the xml2-config script: $XML2_CONFIG" ])
          CPPFLAGS="$ac_save_CPPFLAGS"
          LIBS="$ac_save_LIBS"
       fi
     fi

     XML_CPPFLAGS=""
     XML_LIBS=""
     ifelse([$3], , :, [$3])
  fi
  AC_SUBST(XML_CPPFLAGS)
  AC_SUBST(XML_LIBS)
  rm -f conf.xmltest
])

# Copyright (C) 2002-2013 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='1.14'
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], [1.14.1], [],
      [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([1.14.1])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) 2011-2013 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)
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# AM_CONDITIONAL                                            -*- Autoconf -*-

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# Generate code to set up dependency tracking.              -*- Autoconf -*-

# Copyright (C) 1999-2013 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# This file is free software; the Free Software Foundation
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# Copyright (C) 2003-2013 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
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# Check to see how 'make' treats includes.	            -*- Autoconf -*-

# Copyright (C) 2001-2013 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
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# Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-

# Copyright (C) 1997-2013 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_MISSING_PROG(NAME, PROGRAM)
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#  -*- Autoconf -*-
# Obsolete and "removed" macros, that must however still report explicit
# error messages when used, to smooth transition.
#
# Copyright (C) 1996-2013 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
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AC_DEFUN([AM_CONFIG_HEADER],
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# Helper functions for option handling.                     -*- Autoconf -*-

# Copyright (C) 2001-2013 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
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# Copyright (C) 1999-2013 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
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# _AM_PROG_CC_C_O
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AC_LANG_POP([C])])

# For backward compatibility.
AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])

# Copyright (C) 2001-2013 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_RUN_LOG(COMMAND)
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# Check to make sure that the build environment is sane.    -*- Autoconf -*-

# Copyright (C) 1996-2013 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
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# AM_SANITY_CHECK
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# Reject unsafe characters in $srcdir or the absolute working directory
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# Copyright (C) 2009-2013 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_SILENT_RULES([DEFAULT])
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# Copyright (C) 2001-2013 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_INSTALL_STRIP
# ---------------------
# One issue with vendor 'install' (even GNU) is that you can't
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AC_DEFUN([AM_PROG_INSTALL_STRIP],
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AC_SUBST([INSTALL_STRIP_PROGRAM])])

# Copyright (C) 2006-2013 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_SUBST_NOTMAKE(VARIABLE)
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# AM_SUBST_NOTMAKE(VARIABLE)
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AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])

# Check how to create a tarball.                            -*- Autoconf -*-

# Copyright (C) 2004-2013 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_TAR(FORMAT)
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# Check how to create a tarball in format FORMAT.
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  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
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AC_SUBST([am__tar])
AC_SUBST([am__untar])
]) # _AM_PROG_TAR

m4_include([m4/libtool.m4])
m4_include([m4/ltoptions.m4])
m4_include([m4/ltsugar.m4])
m4_include([m4/ltversion.m4])
m4_include([m4/lt~obsolete.m4])