aclocal.m4

# generated automatically by aclocal 1.17 -*- Autoconf -*-

# Copyright (C) 1996-2024 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.

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# Copyright (C) 2002-2024 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_AUX_DIR_EXPAND                                         -*- Autoconf -*-

# Copyright (C) 2001-2024 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.

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# AM_CONDITIONAL                                            -*- Autoconf -*-

# Copyright (C) 1997-2024 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.

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# Copyright (C) 1999-2024 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
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# -------------
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AC_DEFUN([AM_SET_DEPDIR],
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AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
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# Generate code to set up dependency tracking.              -*- Autoconf -*-

# Copyright (C) 1999-2024 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_OUTPUT_DEPENDENCY_COMMANDS
# ------------------------------
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# AM_OUTPUT_DEPENDENCY_COMMANDS
# -----------------------------
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# Do all the work for Automake.                             -*- Autoconf -*-

# Copyright (C) 1996-2024 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 macro actually does too much.  Some checks are only needed if
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AC_REQUIRE([_AM_SILENT_RULES])dnl
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dnl The trailing newline in this macro's definition is deliberate, for
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dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
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# When config.status generates a header, we must update the stamp-h file.
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# Copyright (C) 2001-2024 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_SH
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# Copyright (C) 2003-2024 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 whether the underlying file-system supports filenames
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# Add --enable-maintainer-mode option to configure.         -*- Autoconf -*-
# From Jim Meyering

# Copyright (C) 1996-2024 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_MAINTAINER_MODE([DEFAULT-MODE])
# ----------------------------------
# Control maintainer-specific portions of Makefiles.
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# Check to see how 'make' treats includes.	            -*- Autoconf -*-

# Copyright (C) 2001-2024 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_MAKE_INCLUDE()
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AC_DEFUN([AM_MAKE_INCLUDE],
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am__include="#"
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echo 'include confinc.mk # ignored' > confmf.GNU
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AC_MSG_RESULT([${_am_result}])
AC_SUBST([am__include])])
AC_SUBST([am__quote])])

# Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-

# Copyright (C) 1997-2024 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)
# ------------------------------
AC_DEFUN([AM_MISSING_PROG],
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# AM_MISSING_HAS_RUN
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  am_missing_run=
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fi
])

# Helper functions for option handling.                     -*- Autoconf -*-

# Copyright (C) 2001-2024 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_MANGLE_OPTION(NAME)
# -----------------------
AC_DEFUN([_AM_MANGLE_OPTION],
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# _AM_SET_OPTION(NAME)
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# Set option NAME.  Presently that only means defining a flag for this option.
AC_DEFUN([_AM_SET_OPTION],
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# _AM_SET_OPTIONS(OPTIONS)
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AC_DEFUN([_AM_SET_OPTIONS],
[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])

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# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
AC_DEFUN([_AM_IF_OPTION],
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# Copyright (C) 1999-2024 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_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) 1999-2024 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_PATH_PYTHON([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
# ---------------------------------------------------------------------------
# Adds support for distributing Python modules and packages.  To
# install modules, copy them to $(pythondir), using the python_PYTHON
# automake variable.  To install a package with the same name as the
# automake package, install to $(pkgpythondir), or use the
# pkgpython_PYTHON automake variable.
#
# The variables $(pyexecdir) and $(pkgpyexecdir) are provided as
# locations to install python extension modules (shared libraries).
# Another macro is required to find the appropriate flags to compile
# extension modules.
#
# If your package is configured with a different prefix to python,
# users will have to add the install directory to the PYTHONPATH
# environment variable, or create a .pth file (see the python
# documentation for details).
#
# If the MINIMUM-VERSION argument is passed, AM_PATH_PYTHON will
# cause an error if the version of python installed on the system
# doesn't meet the requirement.  MINIMUM-VERSION should consist of
# numbers and dots only.
AC_DEFUN([AM_PATH_PYTHON],
 [
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  AC_ARG_VAR([PYTHON], [the Python interpreter])

  m4_if([$1],[],[
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  if test "$PYTHON" = :; then
    dnl Run any user-specified action, or abort.
    m4_default([$3], [AC_MSG_ERROR([no suitable Python interpreter found])])
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  dnl Query Python for its version number.  Although site.py simply uses
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  AC_CACHE_CHECK([for $am_display_PYTHON version], [am_cv_python_version],
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  AC_SUBST([PYTHON_VERSION], [$am_cv_python_version])

  dnl At times, e.g., when building shared libraries, you may want
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  AC_CACHE_CHECK([for $am_display_PYTHON platform], [am_cv_python_platform],
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  dnl emacs-page
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  # Allow user to request using sys.* values from Python,
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  AC_ARG_WITH([python-sys-prefix],
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                  [use Python's sys.prefix and sys.exec_prefix values])],
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  [am_use_python_sys=false])

  # Allow user to override whatever the default Python prefix is.
  AC_ARG_WITH([python_prefix],
  [AS_HELP_STRING([--with-python_prefix],
                  [override the default PYTHON_PREFIX])],
  [am_python_prefix_subst=$withval
   am_cv_python_prefix=$withval
   AC_MSG_CHECKING([for explicit $am_display_PYTHON prefix])
   AC_MSG_RESULT([$am_cv_python_prefix])],
  [
   if $am_use_python_sys; then
     # using python sys.prefix value, not GNU
     AC_CACHE_CHECK([for python default $am_display_PYTHON prefix],
     [am_cv_python_prefix],
     [am_cv_python_prefix=`$PYTHON -c "import sys; sys.stdout.write(sys.prefix)"`])

     dnl If sys.prefix is a subdir of $prefix, replace the literal value of
     dnl $prefix with a variable reference so it can be overridden.
     case $am_cv_python_prefix in
     $am__usable_prefix*)
       am__strip_prefix=`echo "$am__usable_prefix" | sed 's|.|.|g'`
       am_python_prefix_subst=`echo "$am_cv_python_prefix" | sed "s,^$am__strip_prefix,\\${prefix},"`
       ;;
     *)
       am_python_prefix_subst=$am_cv_python_prefix
       ;;
     esac
   else # using GNU prefix value, not python sys.prefix
     am_python_prefix_subst='${prefix}'
     am_python_prefix=$am_python_prefix_subst
     AC_MSG_CHECKING([for GNU default $am_display_PYTHON prefix])
     AC_MSG_RESULT([$am_python_prefix])
   fi])
  # Substituting python_prefix_subst value.
  AC_SUBST([PYTHON_PREFIX], [$am_python_prefix_subst])

  # emacs-page Now do it all over again for Python exec_prefix, but with yet
  # another conditional: fall back to regular prefix if that was specified.
  AC_ARG_WITH([python_exec_prefix],
  [AS_HELP_STRING([--with-python_exec_prefix],
                  [override the default PYTHON_EXEC_PREFIX])],
  [am_python_exec_prefix_subst=$withval
   am_cv_python_exec_prefix=$withval
   AC_MSG_CHECKING([for explicit $am_display_PYTHON exec_prefix])
   AC_MSG_RESULT([$am_cv_python_exec_prefix])],
  [
   # no explicit --with-python_exec_prefix, but if
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   AS_IF([test -n "$with_python_prefix"],
   [am_python_exec_prefix_subst=$with_python_prefix
    am_cv_python_exec_prefix=$with_python_prefix
    AC_MSG_CHECKING([for python_prefix-given $am_display_PYTHON exec_prefix])
    AC_MSG_RESULT([$am_cv_python_exec_prefix])],
   [
    # Set am__usable_exec_prefix whether using GNU or Python values,
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    if test "x$exec_prefix" = xNONE; then
      am__usable_exec_prefix=$am__usable_prefix
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      am__usable_exec_prefix=$exec_prefix
    fi
    #
    if $am_use_python_sys; then # using python sys.exec_prefix, not GNU
      AC_CACHE_CHECK([for python default $am_display_PYTHON exec_prefix],
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      [am_cv_python_exec_prefix=`$PYTHON -c "import sys; sys.stdout.write(sys.exec_prefix)"`])
      dnl If sys.exec_prefix is a subdir of $exec_prefix, replace the
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      case $am_cv_python_exec_prefix in
      $am__usable_exec_prefix*)
        am__strip_prefix=`echo "$am__usable_exec_prefix" | sed 's|.|.|g'`
        am_python_exec_prefix_subst=`echo "$am_cv_python_exec_prefix" | sed "s,^$am__strip_prefix,\\${exec_prefix},"`
        ;;
      *)
        am_python_exec_prefix_subst=$am_cv_python_exec_prefix
        ;;
     esac
   else # using GNU $exec_prefix, not python sys.exec_prefix
     am_python_exec_prefix_subst='${exec_prefix}'
     am_python_exec_prefix=$am_python_exec_prefix_subst
     AC_MSG_CHECKING([for GNU default $am_display_PYTHON exec_prefix])
     AC_MSG_RESULT([$am_python_exec_prefix])
   fi])])
  # Substituting python_exec_prefix_subst.
  AC_SUBST([PYTHON_EXEC_PREFIX], [$am_python_exec_prefix_subst])

  # Factor out some code duplication into this shell variable.
  am_python_setup_sysconfig="\
import sys
# Prefer sysconfig over distutils.sysconfig, for better compatibility
# with python 3.x.  See automake bug#10227.
try:
    import sysconfig
except ImportError:
    can_use_sysconfig = 0
else:
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# Can't use sysconfig in CPython 2.7, since it's broken in virtualenvs:
# <https://github.com/pypa/virtualenv/issues/118>
try:
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    if python_implementation() == 'CPython' and sys.version[[:3]] == '2.7':
        can_use_sysconfig = 0
except ImportError:
    pass" # end of am_python_setup_sysconfig

  # More repeated code, for figuring out the installation scheme to use.
  am_python_setup_scheme="if hasattr(sysconfig, 'get_default_scheme'):
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  dnl emacs-page Set up 4 directories:

  dnl 1. pythondir: where to install python scripts.  This is the
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  AC_CACHE_CHECK([for $am_display_PYTHON script directory (pythondir)],
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     am_py_prefix=$am_cv_python_prefix
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   am_cv_python_pythondir=`$PYTHON -c "
$am_python_setup_sysconfig
if can_use_sysconfig:
  try:
    $am_python_setup_scheme
    sitedir = sysconfig.get_path('purelib', scheme, vars={'base':'$am_py_prefix'})
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    sitedir = sysconfig.get_path('purelib', vars={'base':'$am_py_prefix'})
else:
  from distutils import sysconfig
  sitedir = sysconfig.get_python_lib(0, 0, prefix='$am_py_prefix')
sys.stdout.write(sitedir)"`
   #
   case $am_cv_python_pythondir in
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     am__strip_prefix=`echo "$am_py_prefix" | sed 's|.|.|g'`
     am_cv_python_pythondir=`echo "$am_cv_python_pythondir" | sed "s,^$am__strip_prefix,\\${PYTHON_PREFIX},"`
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   *)
     case $am_py_prefix in
       /usr|/System*) ;;
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  AC_SUBST([pythondir], [$am_cv_python_pythondir])

  dnl 2. pkgpythondir: $PACKAGE directory under pythondir.  Was
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  AC_SUBST([pkgpythondir], [\${pythondir}/$PACKAGE])

  dnl 3. pyexecdir: directory for installing python extension modules
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  dnl
  AC_CACHE_CHECK([for $am_display_PYTHON extension module directory (pyexecdir)],
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     am_py_exec_prefix=$am__usable_exec_prefix
   else
     am_py_exec_prefix=$am_cv_python_exec_prefix
   fi
   am_cv_python_pyexecdir=`$PYTHON -c "
$am_python_setup_sysconfig
if can_use_sysconfig:
  try:
    $am_python_setup_scheme
    sitedir = sysconfig.get_path('platlib', scheme, vars={'platbase':'$am_py_exec_prefix'})
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    sitedir = sysconfig.get_path('platlib', vars={'platbase':'$am_py_exec_prefix'})
else:
  from distutils import sysconfig
  sitedir = sysconfig.get_python_lib(1, 0, prefix='$am_py_exec_prefix')
sys.stdout.write(sitedir)"`
   #
   case $am_cv_python_pyexecdir in
   $am_py_exec_prefix*)
     am__strip_prefix=`echo "$am_py_exec_prefix" | sed 's|.|.|g'`
     am_cv_python_pyexecdir=`echo "$am_cv_python_pyexecdir" | sed "s,^$am__strip_prefix,\\${PYTHON_EXEC_PREFIX},"`
     ;;
   *)
     case $am_py_exec_prefix in
       /usr|/System*) ;;
       *) am_cv_python_pyexecdir="\${PYTHON_EXEC_PREFIX}/lib/python$PYTHON_VERSION/site-packages"
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  AC_SUBST([pyexecdir], [$am_cv_python_pyexecdir])

  dnl 4. pkgpyexecdir: $(pyexecdir)/$(PACKAGE)
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  AC_SUBST([pkgpyexecdir], [\${pyexecdir}/$PACKAGE])

  dnl Run any user-specified action.
  $2
  fi
])


# AM_PYTHON_CHECK_VERSION(PROG, VERSION, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
# ---------------------------------------------------------------------------
# Run ACTION-IF-TRUE if the Python interpreter PROG has version >= VERSION.
# Run ACTION-IF-FALSE otherwise.
# This test uses sys.hexversion instead of the string equivalent (first
# word of sys.version), in order to cope with versions such as 2.2c1.
# This supports Python 2.0 or higher. (2.0 was released on October 16, 2000).
AC_DEFUN([AM_PYTHON_CHECK_VERSION],
 [prog="import sys
# split strings by '.' and convert to numeric.  Append some zeros
# because we need at least 4 digits for the hex conversion.
# map returns an iterator in Python 3.0 and a list in 2.x
minver = list(map(int, '$2'.split('.'))) + [[0, 0, 0]]
minverhex = 0
# xrange is not present in Python 3.0 and range returns an iterator
for i in list(range(0, 4)): minverhex = (minverhex << 8) + minver[[i]]
sys.exit(sys.hexversion < minverhex)"
  AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])

# Copyright (C) 2022-2024 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_RM_F
# ---------------
# Check whether 'rm -f' without any arguments works.
# https://bugs.gnu.org/10828
AC_DEFUN([_AM_PROG_RM_F],
[am__rm_f_notfound=
AS_IF([(rm -f && rm -fr && rm -rf) 2>/dev/null], [], [am__rm_f_notfound='""'])
AC_SUBST(am__rm_f_notfound)
])

# Copyright (C) 2001-2024 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)
# -------------------
# Run COMMAND, save the exit status in ac_status, and log it.
# (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
AC_DEFUN([AM_RUN_LOG],
[{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
   ($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
   (exit $ac_status); }])

# Check to make sure that the build environment is sane.    -*- Autoconf -*-

# Copyright (C) 1996-2024 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_SLEEP_FRACTIONAL_SECONDS
# ----------------------------
AC_DEFUN([_AM_SLEEP_FRACTIONAL_SECONDS], [dnl
AC_CACHE_CHECK([whether sleep supports fractional seconds],
               am_cv_sleep_fractional_seconds, [dnl
AS_IF([sleep 0.001 2>/dev/null], [am_cv_sleep_fractional_seconds=yes],
                                 [am_cv_sleep_fractional_seconds=no])
])])

# _AM_FILESYSTEM_TIMESTAMP_RESOLUTION
# -----------------------------------
# Determine the filesystem's resolution for file modification
# timestamps.  The coarsest we know of is FAT, with a resolution
# of only two seconds, even with the most recent "exFAT" extensions.
# The finest (e.g. ext4 with large inodes, XFS, ZFS) is one
# nanosecond, matching clock_gettime.  However, it is probably not
# possible to delay execution of a shell script for less than one
# millisecond, due to process creation overhead and scheduling
# granularity, so we don't check for anything finer than that. (See below.)
AC_DEFUN([_AM_FILESYSTEM_TIMESTAMP_RESOLUTION], [dnl
AC_REQUIRE([_AM_SLEEP_FRACTIONAL_SECONDS])
AC_CACHE_CHECK([filesystem timestamp resolution],
               am_cv_filesystem_timestamp_resolution, [dnl
# Default to the worst case.
am_cv_filesystem_timestamp_resolution=2

# Only try to go finer than 1 sec if sleep can do it.
# Don't try 1 sec, because if 0.01 sec and 0.1 sec don't work,
# - 1 sec is not much of a win compared to 2 sec, and
# - it takes 2 seconds to perform the test whether 1 sec works.
# 
# Instead, just use the default 2s on platforms that have 1s resolution,
# accept the extra 1s delay when using $sleep in the Automake tests, in
# exchange for not incurring the 2s delay for running the test for all
# packages.
#
am_try_resolutions=
if test "$am_cv_sleep_fractional_seconds" = yes; then
  # Even a millisecond often causes a bunch of false positives,
  # so just try a hundredth of a second. The time saved between .001 and
  # .01 is not terribly consequential.
  am_try_resolutions="0.01 0.1 $am_try_resolutions"
fi

# In order to catch current-generation FAT out, we must *modify* files
# that already exist; the *creation* timestamp is finer.  Use names
# that make ls -t sort them differently when they have equal
# timestamps than when they have distinct timestamps, keeping
# in mind that ls -t prints the *newest* file first.
rm -f conftest.ts?
: > conftest.ts1
: > conftest.ts2
: > conftest.ts3

# Make sure ls -t actually works.  Do 'set' in a subshell so we don't
# clobber the current shell's arguments. (Outer-level square brackets
# are removed by m4; they're present so that m4 does not expand
# <dollar><star>; be careful, easy to get confused.)
if (
     set X `[ls -t conftest.ts[12]]` &&
     {
       test "$[]*" != "X conftest.ts1 conftest.ts2" ||
       test "$[]*" != "X conftest.ts2 conftest.ts1";
     }
); then :; else
  # 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".
  _AS_ECHO_UNQUOTED(
    ["Bad output from ls -t: \"`[ls -t conftest.ts[12]]`\""],
    [AS_MESSAGE_LOG_FD])
  AC_MSG_FAILURE([ls -t produces unexpected output.
Make sure there is not a broken ls alias in your environment.])
fi

for am_try_res in $am_try_resolutions; do
  # Any one fine-grained sleep might happen to cross the boundary
  # between two values of a coarser actual resolution, but if we do
  # two fine-grained sleeps in a row, at least one of them will fall
  # entirely within a coarse interval.
  echo alpha > conftest.ts1
  sleep $am_try_res
  echo beta > conftest.ts2
  sleep $am_try_res
  echo gamma > conftest.ts3

  # We assume that 'ls -t' will make use of high-resolution
  # timestamps if the operating system supports them at all.
  if (set X `ls -t conftest.ts?` &&
      test "$[]2" = conftest.ts3 &&
      test "$[]3" = conftest.ts2 &&
      test "$[]4" = conftest.ts1); then
    #
    # Ok, ls -t worked. If we're at a resolution of 1 second, we're done,
    # because we don't need to test make.
    make_ok=true
    if test $am_try_res != 1; then
      # But if we've succeeded so far with a subsecond resolution, we
      # have one more thing to check: make. It can happen that
      # everything else supports the subsecond mtimes, but make doesn't;
      # notably on macOS, which ships make 3.81 from 2006 (the last one
      # released under GPLv2). https://bugs.gnu.org/68808
      # 
      # We test $MAKE if it is defined in the environment, else "make".
      # It might get overridden later, but our hope is that in practice
      # it does not matter: it is the system "make" which is (by far)
      # the most likely to be broken, whereas if the user overrides it,
      # probably they did so with a better, or at least not worse, make.
      # https://lists.gnu.org/archive/html/automake/2024-06/msg00051.html
      #
      # Create a Makefile (real tab character here):
      rm -f conftest.mk
      echo 'conftest.ts1: conftest.ts2' >conftest.mk
      echo '	touch conftest.ts2' >>conftest.mk
      #
      # Now, running
      #   touch conftest.ts1; touch conftest.ts2; make
      # should touch ts1 because ts2 is newer. This could happen by luck,
      # but most often, it will fail if make's support is insufficient. So
      # test for several consecutive successes.
      #
      # (We reuse conftest.ts[12] because we still want to modify existing
      # files, not create new ones, per above.)
      n=0
      make=${MAKE-make}
      until test $n -eq 3; do
        echo one > conftest.ts1
        sleep $am_try_res
        echo two > conftest.ts2 # ts2 should now be newer than ts1
        if $make -f conftest.mk | grep 'up to date' >/dev/null; then
          make_ok=false
          break # out of $n loop
        fi
        n=`expr $n + 1`
      done
    fi
    #
    if $make_ok; then
      # Everything we know to check worked out, so call this resolution good.
      am_cv_filesystem_timestamp_resolution=$am_try_res
      break # out of $am_try_res loop
    fi
    # Otherwise, we'll go on to check the next resolution.
  fi
done
rm -f conftest.ts?
# (end _am_filesystem_timestamp_resolution)
])])

# AM_SANITY_CHECK
# ---------------
AC_DEFUN([AM_SANITY_CHECK],
[AC_REQUIRE([_AM_FILESYSTEM_TIMESTAMP_RESOLUTION])
# This check should not be cached, as it may vary across builds of
# different projects.
AC_MSG_CHECKING([whether build environment is sane])
# Reject unsafe characters in $srcdir or the absolute working directory
# name.  Accept space and tab only in the latter.
am_lf='
'
case `pwd` in
  *[[\\\"\#\$\&\'\`$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).
am_build_env_is_sane=no
am_has_slept=no
rm -f conftest.file
for am_try in 1 2; do
  echo "timestamp, slept: $am_has_slept" > conftest.file
  if (
    set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
    if test "$[]*" = "X"; then
      # -L didn't work.
      set X `ls -t "$srcdir/configure" conftest.file`
    fi
    test "$[]2" = conftest.file
  ); then
    am_build_env_is_sane=yes
    break
  fi
  # Just in case.
  sleep "$am_cv_filesystem_timestamp_resolution"
  am_has_slept=yes
done

AC_MSG_RESULT([$am_build_env_is_sane])
if test "$am_build_env_is_sane" = no; then
  AC_MSG_ERROR([newly created file is older than distributed files!
Check your system clock])
fi

# If we didn't sleep, we still need to ensure time stamps of config.status and
# generated files are strictly newer.
am_sleep_pid=
AS_IF([test -e conftest.file || grep 'slept: no' conftest.file >/dev/null 2>&1],, [dnl
  ( sleep "$am_cv_filesystem_timestamp_resolution" ) &
  am_sleep_pid=$!
])
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) 2009-2024 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
# ----------------
# Enable less verbose build rules support.
AC_DEFUN([_AM_SILENT_RULES],
[AM_DEFAULT_VERBOSITY=1
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
])
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])
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
dnl Delay evaluation of AM_DEFAULT_VERBOSITY to the end to allow multiple calls
dnl to AM_SILENT_RULES to change the default value.
AC_CONFIG_COMMANDS_PRE([dnl
case $enable_silent_rules in @%:@ (((
  yes) AM_DEFAULT_VERBOSITY=0;;
   no) AM_DEFAULT_VERBOSITY=1;;
esac
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
])dnl
])

# AM_SILENT_RULES([DEFAULT])
# --------------------------
# Set the default verbosity level to DEFAULT ("yes" being less verbose, "no" or
# empty being verbose).
AC_DEFUN([AM_SILENT_RULES],
[AC_REQUIRE([_AM_SILENT_RULES])
AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1])])

# Copyright (C) 2001-2024 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) 2006-2024 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) 2004-2024 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 x$am_uid = xunknown; then
        AC_MSG_WARN([ancient id detected; assuming current UID is ok, but dist-ustar might not work])
      elif 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 x$gm_gid = xunknown; then
        AC_MSG_WARN([ancient id detected; assuming current GID is ok, but dist-ustar might not work])
      elif 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

# Copyright (C) 2022-2024 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_XARGS_N
# ----------------
# Check whether 'xargs -n' works.  It should work everywhere, so the fallback
# is not optimized at all as we never expect to use it.
AC_DEFUN([_AM_PROG_XARGS_N],
[AC_CACHE_CHECK([xargs -n works], am_cv_xargs_n_works, [dnl
AS_IF([test "`echo 1 2 3 | xargs -n2 echo`" = "1 2
3"], [am_cv_xargs_n_works=yes], [am_cv_xargs_n_works=no])])
AS_IF([test "$am_cv_xargs_n_works" = yes], [am__xargs_n='xargs -n'], [dnl
  am__xargs_n='am__xargs_n () { shift; sed "s/ /\\n/g" | while read am__xargs_n_arg; do "$@" "$am__xargs_n_arg"; done; }'
])dnl
AC_SUBST(am__xargs_n)
])

m4_include([m4/ax_check_compile_flag.m4])
m4_include([m4/ax_compiler_vendor.m4])
m4_include([m4/ax_gcc_version.m4])
m4_include([m4/ax_openmp.m4])
m4_include([m4/ax_prog_cc_mpi.m4])
m4_include([m4/ax_split_version.m4])
m4_include([m4/ax_with_build_path.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])