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  am_lf='
  '
  case `pwd` in
    *[[\\\"\#\$\&\'\`$am_lf]]*)
      AC_MSG_ERROR([unsafe absolute working directory name]);;
  esac
  case $srcdir in
    *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
      AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
  esac
  
  # Do 'set' in a subshell so we don't clobber the current shell's
  # arguments.  Must try -L first in case configure is actually a
  # symlink; some systems play weird games with the mod time of symlinks
  # (eg FreeBSD returns the mod time of the symlink's containing
  # directory).
  if (
     am_has_slept=no
     for am_try in 1 2; do
       echo "timestamp, slept: $am_has_slept" > conftest.file
       set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
       if test "$[*]" = "X"; then
  	# -L didn't work.
  	set X `ls -t "$srcdir/configure" conftest.file`
       fi
       if test "$[*]" != "X $srcdir/configure conftest.file" \
  	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
  
  	# If neither matched, then we have a broken ls.  This can happen
  	# if, for instance, CONFIG_SHELL is bash and it inherits a
  	# broken ls alias from the environment.  This has actually
  	# happened.  Such a system could not be considered "sane".
  	AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
    alias in your environment])
       fi
       if test "$[2]" = conftest.file || test $am_try -eq 2; then
         break
       fi
       # Just in case.
       sleep 1
       am_has_slept=yes
     done
     test "$[2]" = conftest.file
     )
  then
     # Ok.
     :
  else
     AC_MSG_ERROR([newly created file is older than distributed files!
  Check your system clock])
  fi
  AC_MSG_RESULT([yes])
  # If we didn't sleep, we still need to ensure time stamps of config.status and
  # generated files are strictly newer.
  am_sleep_pid=
  if grep 'slept: no' conftest.file >/dev/null 2>&1; then
    ( sleep 1 ) &
    am_sleep_pid=$!
  fi
  AC_CONFIG_COMMANDS_PRE(
    [AC_MSG_CHECKING([that generated files are newer than configure])
     if test -n "$am_sleep_pid"; then
       # Hide warnings about reused PIDs.
       wait $am_sleep_pid 2>/dev/null
     fi
     AC_MSG_RESULT([done])])
  rm -f conftest.file
  ])
  
  # 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])
  # --------------------------
  # Enable less verbose build rules; with the default set to DEFAULT
  # ("yes" being less verbose, "no" or empty being verbose).
  AC_DEFUN([AM_SILENT_RULES],
  [AC_ARG_ENABLE([silent-rules], [dnl
  AS_HELP_STRING(
    [--enable-silent-rules],
    [less verbose build output (undo: "make V=1")])
  AS_HELP_STRING(
    [--disable-silent-rules],
    [verbose build output (undo: "make V=0")])dnl
  ])
  case $enable_silent_rules in @%:@ (((
    yes) AM_DEFAULT_VERBOSITY=0;;
     no) AM_DEFAULT_VERBOSITY=1;;
      *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
  esac
  dnl
  dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
  dnl do not support nested variable expansions.
  dnl See automake bug#9928 and bug#10237.
  am_make=${MAKE-make}
  AC_CACHE_CHECK([whether $am_make supports nested variables],
     [am_cv_make_support_nested_variables],
     [if AS_ECHO([['TRUE=$(BAR$(V))
  BAR0=false
  BAR1=true
  V=1
  am__doit:
  	@$(TRUE)
  .PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
    am_cv_make_support_nested_variables=yes
  else
    am_cv_make_support_nested_variables=no
  fi])
  if test $am_cv_make_support_nested_variables = yes; then
    dnl Using '$V' instead of '$(V)' breaks IRIX make.
    AM_V='$(V)'
    AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
  else
    AM_V=$AM_DEFAULT_VERBOSITY
    AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
  fi
  AC_SUBST([AM_V])dnl
  AM_SUBST_NOTMAKE([AM_V])dnl
  AC_SUBST([AM_DEFAULT_V])dnl
  AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
  AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
  AM_BACKSLASH='\'
  AC_SUBST([AM_BACKSLASH])dnl
  _AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
  ])
  
  # 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
  # specify the program used to strip binaries.  This is especially
  # annoying in cross-compiling environments, where the build's strip
  # is unlikely to handle the host's binaries.
  # Fortunately install-sh will honor a STRIPPROG variable, so we
  # always use install-sh in "make install-strip", and initialize
  # STRIPPROG with the value of the STRIP variable (set by the user).
  AC_DEFUN([AM_PROG_INSTALL_STRIP],
  [AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
  # Installed binaries are usually stripped using 'strip' when the user
  # run "make install-strip".  However 'strip' might not be the right
  # tool to use in cross-compilation environments, therefore Automake
  # will honor the 'STRIP' environment variable to overrule this program.
  dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
  if test "$cross_compiling" != no; then
    AC_CHECK_TOOL([STRIP], [strip], :)
  fi
  INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
  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)
  # ---------------------------
  # Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
  # This macro is traced by Automake.
  AC_DEFUN([_AM_SUBST_NOTMAKE])
  
  # AM_SUBST_NOTMAKE(VARIABLE)
  # --------------------------
  # Public sister of _AM_SUBST_NOTMAKE.
  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)
  # --------------------
  # Check how to create a tarball in format FORMAT.
  # FORMAT should be one of 'v7', 'ustar', or 'pax'.
  #
  # Substitute a variable $(am__tar) that is a command
  # writing to stdout a FORMAT-tarball containing the directory
  # $tardir.
  #     tardir=directory && $(am__tar) > result.tar
  #
  # Substitute a variable $(am__untar) that extract such
  # a tarball read from stdin.
  #     $(am__untar) < result.tar
  #
  AC_DEFUN([_AM_PROG_TAR],
  [# Always define AMTAR for backward compatibility.  Yes, it's still used
  # in the wild :-(  We should find a proper way to deprecate it ...
  AC_SUBST([AMTAR], ['$${TAR-tar}'])
  
  # We'll loop over all known methods to create a tar archive until one works.
  _am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
  
  m4_if([$1], [v7],
    [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
  
    [m4_case([$1],
      [ustar],
       [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
        # There is notably a 21 bits limit for the UID and the GID.  In fact,
        # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
        # and bug#13588).
        am_max_uid=2097151 # 2^21 - 1
        am_max_gid=$am_max_uid
        # The $UID and $GID variables are not portable, so we need to resort
        # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
        # below are definitely unexpected, so allow the users to see them
        # (that is, avoid stderr redirection).
        am_uid=`id -u || echo unknown`
        am_gid=`id -g || echo unknown`
        AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
        if test $am_uid -le $am_max_uid; then
           AC_MSG_RESULT([yes])
        else
           AC_MSG_RESULT([no])
           _am_tools=none
        fi
        AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
        if test $am_gid -le $am_max_gid; then
           AC_MSG_RESULT([yes])
        else
          AC_MSG_RESULT([no])
          _am_tools=none
        fi],
  
    [pax],
      [],
  
    [m4_fatal([Unknown tar format])])
  
    AC_MSG_CHECKING([how to create a $1 tar archive])
  
    # Go ahead even if we have the value already cached.  We do so because we
    # need to set the values for the 'am__tar' and 'am__untar' variables.
    _am_tools=${am_cv_prog_tar_$1-$_am_tools}
  
    for _am_tool in $_am_tools; do
      case $_am_tool in
      gnutar)
        for _am_tar in tar gnutar gtar; do
          AM_RUN_LOG([$_am_tar --version]) && break
        done
        am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
        am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
        am__untar="$_am_tar -xf -"
        ;;
      plaintar)
        # Must skip GNU tar: if it does not support --format= it doesn't create
        # ustar tarball either.
        (tar --version) >/dev/null 2>&1 && continue
        am__tar='tar chf - "$$tardir"'
        am__tar_='tar chf - "$tardir"'
        am__untar='tar xf -'
        ;;
      pax)
        am__tar='pax -L -x $1 -w "$$tardir"'
        am__tar_='pax -L -x $1 -w "$tardir"'
        am__untar='pax -r'
        ;;
      cpio)
        am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
        am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
        am__untar='cpio -i -H $1 -d'
        ;;
      none)
        am__tar=false
        am__tar_=false
        am__untar=false
        ;;
      esac
  
      # If the value was cached, stop now.  We just wanted to have am__tar
      # and am__untar set.
      test -n "${am_cv_prog_tar_$1}" && break
  
      # tar/untar a dummy directory, and stop if the command works.
      rm -rf conftest.dir
      mkdir conftest.dir
      echo GrepMe > conftest.dir/file
      AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
      rm -rf conftest.dir
      if test -s conftest.tar; then
        AM_RUN_LOG([$am__untar <conftest.tar])
        AM_RUN_LOG([cat conftest.dir/file])
        grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
      fi
    done
    rm -rf conftest.dir
  
    AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
    AC_MSG_RESULT([$am_cv_prog_tar_$1])])
  
  AC_SUBST([am__tar])
  AC_SUBST([am__untar])
  ]) # _AM_PROG_TAR
  
  m4_include([m4/ac_python_devel.m4])
  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])