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    1 # generated automatically by aclocal 1.16.5 -*- Autoconf -*-
    2 
    3 # Copyright (C) 1996-2021 Free Software Foundation, Inc.
    4 
    5 # This file is free software; the Free Software Foundation
    6 # gives unlimited permission to copy and/or distribute it,
    7 # with or without modifications, as long as this notice is preserved.
    8 
    9 # This program is distributed in the hope that it will be useful,
   10 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
   11 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
   12 # PARTICULAR PURPOSE.
   13 
   14 m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])])
   15 m4_ifndef([AC_AUTOCONF_VERSION],
   16   [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
   17 m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.71],,
   18 [m4_warning([this file was generated for autoconf 2.71.
   19 You have another version of autoconf.  It may work, but is not guaranteed to.
   20 If you have problems, you may need to regenerate the build system entirely.
   21 To do so, use the procedure documented by the package, typically 'autoreconf'.])])
   22 
   23 # pkg.m4 - Macros to locate and utilise pkg-config.   -*- Autoconf -*-
   24 # serial 11 (pkg-config-0.29.1)
   25 
   26 dnl Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
   27 dnl Copyright © 2012-2015 Dan Nicholson <dbn.lists@gmail.com>
   28 dnl
   29 dnl This program is free software; you can redistribute it and/or modify
   30 dnl it under the terms of the GNU General Public License as published by
   31 dnl the Free Software Foundation; either version 2 of the License, or
   32 dnl (at your option) any later version.
   33 dnl
   34 dnl This program is distributed in the hope that it will be useful, but
   35 dnl WITHOUT ANY WARRANTY; without even the implied warranty of
   36 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   37 dnl General Public License for more details.
   38 dnl
   39 dnl You should have received a copy of the GNU General Public License
   40 dnl along with this program; if not, write to the Free Software
   41 dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
   42 dnl 02111-1307, USA.
   43 dnl
   44 dnl As a special exception to the GNU General Public License, if you
   45 dnl distribute this file as part of a program that contains a
   46 dnl configuration script generated by Autoconf, you may include it under
   47 dnl the same distribution terms that you use for the rest of that
   48 dnl program.
   49 
   50 dnl PKG_PREREQ(MIN-VERSION)
   51 dnl -----------------------
   52 dnl Since: 0.29
   53 dnl
   54 dnl Verify that the version of the pkg-config macros are at least
   55 dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's
   56 dnl installed version of pkg-config, this checks the developer's version
   57 dnl of pkg.m4 when generating configure.
   58 dnl
   59 dnl To ensure that this macro is defined, also add:
   60 dnl m4_ifndef([PKG_PREREQ],
   61 dnl     [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])])
   62 dnl
   63 dnl See the "Since" comment for each macro you use to see what version
   64 dnl of the macros you require.
   65 m4_defun([PKG_PREREQ],
   66 [m4_define([PKG_MACROS_VERSION], [0.29.1])
   67 m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1,
   68     [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])])
   69 ])dnl PKG_PREREQ
   70 
   71 dnl PKG_PROG_PKG_CONFIG([MIN-VERSION])
   72 dnl ----------------------------------
   73 dnl Since: 0.16
   74 dnl
   75 dnl Search for the pkg-config tool and set the PKG_CONFIG variable to
   76 dnl first found in the path. Checks that the version of pkg-config found
   77 dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.9.0 is
   78 dnl used since that's the first version where most current features of
   79 dnl pkg-config existed.
   80 AC_DEFUN([PKG_PROG_PKG_CONFIG],
   81 [m4_pattern_forbid([^_?PKG_[A-Z_]+$])
   82 m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$])
   83 m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$])
   84 AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])
   85 AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path])
   86 AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path])
   87 
   88 if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
   89 	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
   90 fi
   91 if test -n "$PKG_CONFIG"; then
   92 	_pkg_min_version=m4_default([$1], [0.9.0])
   93 	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
   94 	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
   95 		AC_MSG_RESULT([yes])
   96 	else
   97 		AC_MSG_RESULT([no])
   98 		PKG_CONFIG=""
   99 	fi
  100 fi[]dnl
  101 ])dnl PKG_PROG_PKG_CONFIG
  102 
  103 dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
  104 dnl -------------------------------------------------------------------
  105 dnl Since: 0.18
  106 dnl
  107 dnl Check to see whether a particular set of modules exists. Similar to
  108 dnl PKG_CHECK_MODULES(), but does not set variables or print errors.
  109 dnl
  110 dnl Please remember that m4 expands AC_REQUIRE([PKG_PROG_PKG_CONFIG])
  111 dnl only at the first occurence in configure.ac, so if the first place
  112 dnl it's called might be skipped (such as if it is within an "if", you
  113 dnl have to call PKG_CHECK_EXISTS manually
  114 AC_DEFUN([PKG_CHECK_EXISTS],
  115 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
  116 if test -n "$PKG_CONFIG" && \
  117     AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
  118   m4_default([$2], [:])
  119 m4_ifvaln([$3], [else
  120   $3])dnl
  121 fi])
  122 
  123 dnl _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
  124 dnl ---------------------------------------------
  125 dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting
  126 dnl pkg_failed based on the result.
  127 m4_define([_PKG_CONFIG],
  128 [if test -n "$$1"; then
  129     pkg_cv_[]$1="$$1"
  130  elif test -n "$PKG_CONFIG"; then
  131     PKG_CHECK_EXISTS([$3],
  132                      [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`
  133 		      test "x$?" != "x0" && pkg_failed=yes ],
  134 		     [pkg_failed=yes])
  135  else
  136     pkg_failed=untried
  137 fi[]dnl
  138 ])dnl _PKG_CONFIG
  139 
  140 dnl _PKG_SHORT_ERRORS_SUPPORTED
  141 dnl ---------------------------
  142 dnl Internal check to see if pkg-config supports short errors.
  143 AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
  144 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])
  145 if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
  146         _pkg_short_errors_supported=yes
  147 else
  148         _pkg_short_errors_supported=no
  149 fi[]dnl
  150 ])dnl _PKG_SHORT_ERRORS_SUPPORTED
  151 
  152 
  153 dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
  154 dnl   [ACTION-IF-NOT-FOUND])
  155 dnl --------------------------------------------------------------
  156 dnl Since: 0.4.0
  157 dnl
  158 dnl Note that if there is a possibility the first call to
  159 dnl PKG_CHECK_MODULES might not happen, you should be sure to include an
  160 dnl explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
  161 AC_DEFUN([PKG_CHECK_MODULES],
  162 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
  163 AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
  164 AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
  165 
  166 pkg_failed=no
  167 AC_MSG_CHECKING([for $1])
  168 
  169 _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
  170 _PKG_CONFIG([$1][_LIBS], [libs], [$2])
  171 
  172 m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
  173 and $1[]_LIBS to avoid the need to call pkg-config.
  174 See the pkg-config man page for more details.])
  175 
  176 if test $pkg_failed = yes; then
  177    	AC_MSG_RESULT([no])
  178         _PKG_SHORT_ERRORS_SUPPORTED
  179         if test $_pkg_short_errors_supported = yes; then
  180 	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1`
  181         else 
  182 	        $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1`
  183         fi
  184 	# Put the nasty error message in config.log where it belongs
  185 	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
  186 
  187 	m4_default([$4], [AC_MSG_ERROR(
  188 [Package requirements ($2) were not met:
  189 
  190 $$1_PKG_ERRORS
  191 
  192 Consider adjusting the PKG_CONFIG_PATH environment variable if you
  193 installed software in a non-standard prefix.
  194 
  195 _PKG_TEXT])[]dnl
  196         ])
  197 elif test $pkg_failed = untried; then
  198      	AC_MSG_RESULT([no])
  199 	m4_default([$4], [AC_MSG_FAILURE(
  200 [The pkg-config script could not be found or is too old.  Make sure it
  201 is in your PATH or set the PKG_CONFIG environment variable to the full
  202 path to pkg-config.
  203 
  204 _PKG_TEXT
  205 
  206 To get pkg-config, see <http://pkg-config.freedesktop.org/>.])[]dnl
  207         ])
  208 else
  209 	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
  210 	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
  211         AC_MSG_RESULT([yes])
  212 	$3
  213 fi[]dnl
  214 ])dnl PKG_CHECK_MODULES
  215 
  216 
  217 dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
  218 dnl   [ACTION-IF-NOT-FOUND])
  219 dnl ---------------------------------------------------------------------
  220 dnl Since: 0.29
  221 dnl
  222 dnl Checks for existence of MODULES and gathers its build flags with
  223 dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags
  224 dnl and VARIABLE-PREFIX_LIBS from --libs.
  225 dnl
  226 dnl Note that if there is a possibility the first call to
  227 dnl PKG_CHECK_MODULES_STATIC might not happen, you should be sure to
  228 dnl include an explicit call to PKG_PROG_PKG_CONFIG in your
  229 dnl configure.ac.
  230 AC_DEFUN([PKG_CHECK_MODULES_STATIC],
  231 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
  232 _save_PKG_CONFIG=$PKG_CONFIG
  233 PKG_CONFIG="$PKG_CONFIG --static"
  234 PKG_CHECK_MODULES($@)
  235 PKG_CONFIG=$_save_PKG_CONFIG[]dnl
  236 ])dnl PKG_CHECK_MODULES_STATIC
  237 
  238 
  239 dnl PKG_INSTALLDIR([DIRECTORY])
  240 dnl -------------------------
  241 dnl Since: 0.27
  242 dnl
  243 dnl Substitutes the variable pkgconfigdir as the location where a module
  244 dnl should install pkg-config .pc files. By default the directory is
  245 dnl $libdir/pkgconfig, but the default can be changed by passing
  246 dnl DIRECTORY. The user can override through the --with-pkgconfigdir
  247 dnl parameter.
  248 AC_DEFUN([PKG_INSTALLDIR],
  249 [m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])])
  250 m4_pushdef([pkg_description],
  251     [pkg-config installation directory @<:@]pkg_default[@:>@])
  252 AC_ARG_WITH([pkgconfigdir],
  253     [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],,
  254     [with_pkgconfigdir=]pkg_default)
  255 AC_SUBST([pkgconfigdir], [$with_pkgconfigdir])
  256 m4_popdef([pkg_default])
  257 m4_popdef([pkg_description])
  258 ])dnl PKG_INSTALLDIR
  259 
  260 
  261 dnl PKG_NOARCH_INSTALLDIR([DIRECTORY])
  262 dnl --------------------------------
  263 dnl Since: 0.27
  264 dnl
  265 dnl Substitutes the variable noarch_pkgconfigdir as the location where a
  266 dnl module should install arch-independent pkg-config .pc files. By
  267 dnl default the directory is $datadir/pkgconfig, but the default can be
  268 dnl changed by passing DIRECTORY. The user can override through the
  269 dnl --with-noarch-pkgconfigdir parameter.
  270 AC_DEFUN([PKG_NOARCH_INSTALLDIR],
  271 [m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])])
  272 m4_pushdef([pkg_description],
  273     [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@])
  274 AC_ARG_WITH([noarch-pkgconfigdir],
  275     [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],,
  276     [with_noarch_pkgconfigdir=]pkg_default)
  277 AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir])
  278 m4_popdef([pkg_default])
  279 m4_popdef([pkg_description])
  280 ])dnl PKG_NOARCH_INSTALLDIR
  281 
  282 
  283 dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
  284 dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
  285 dnl -------------------------------------------
  286 dnl Since: 0.28
  287 dnl
  288 dnl Retrieves the value of the pkg-config variable for the given module.
  289 AC_DEFUN([PKG_CHECK_VAR],
  290 [AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
  291 AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
  292 
  293 _PKG_CONFIG([$1], [variable="][$3]["], [$2])
  294 AS_VAR_COPY([$1], [pkg_cv_][$1])
  295 
  296 AS_VAR_IF([$1], [""], [$5], [$4])dnl
  297 ])dnl PKG_CHECK_VAR
  298 
  299 dnl PKG_WITH_MODULES(VARIABLE-PREFIX, MODULES,
  300 dnl   [ACTION-IF-FOUND],[ACTION-IF-NOT-FOUND],
  301 dnl   [DESCRIPTION], [DEFAULT])
  302 dnl ------------------------------------------
  303 dnl
  304 dnl Prepare a "--with-" configure option using the lowercase
  305 dnl [VARIABLE-PREFIX] name, merging the behaviour of AC_ARG_WITH and
  306 dnl PKG_CHECK_MODULES in a single macro.
  307 AC_DEFUN([PKG_WITH_MODULES],
  308 [
  309 m4_pushdef([with_arg], m4_tolower([$1]))
  310 
  311 m4_pushdef([description],
  312            [m4_default([$5], [build with ]with_arg[ support])])
  313 
  314 m4_pushdef([def_arg], [m4_default([$6], [auto])])
  315 m4_pushdef([def_action_if_found], [AS_TR_SH([with_]with_arg)=yes])
  316 m4_pushdef([def_action_if_not_found], [AS_TR_SH([with_]with_arg)=no])
  317 
  318 m4_case(def_arg,
  319             [yes],[m4_pushdef([with_without], [--without-]with_arg)],
  320             [m4_pushdef([with_without],[--with-]with_arg)])
  321 
  322 AC_ARG_WITH(with_arg,
  323      AS_HELP_STRING(with_without, description[ @<:@default=]def_arg[@:>@]),,
  324     [AS_TR_SH([with_]with_arg)=def_arg])
  325 
  326 AS_CASE([$AS_TR_SH([with_]with_arg)],
  327             [yes],[PKG_CHECK_MODULES([$1],[$2],$3,$4)],
  328             [auto],[PKG_CHECK_MODULES([$1],[$2],
  329                                         [m4_n([def_action_if_found]) $3],
  330                                         [m4_n([def_action_if_not_found]) $4])])
  331 
  332 m4_popdef([with_arg])
  333 m4_popdef([description])
  334 m4_popdef([def_arg])
  335 
  336 ])dnl PKG_WITH_MODULES
  337 
  338 dnl PKG_HAVE_WITH_MODULES(VARIABLE-PREFIX, MODULES,
  339 dnl   [DESCRIPTION], [DEFAULT])
  340 dnl -----------------------------------------------
  341 dnl
  342 dnl Convenience macro to trigger AM_CONDITIONAL after PKG_WITH_MODULES
  343 dnl check._[VARIABLE-PREFIX] is exported as make variable.
  344 AC_DEFUN([PKG_HAVE_WITH_MODULES],
  345 [
  346 PKG_WITH_MODULES([$1],[$2],,,[$3],[$4])
  347 
  348 AM_CONDITIONAL([HAVE_][$1],
  349                [test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"])
  350 ])dnl PKG_HAVE_WITH_MODULES
  351 
  352 dnl PKG_HAVE_DEFINE_WITH_MODULES(VARIABLE-PREFIX, MODULES,
  353 dnl   [DESCRIPTION], [DEFAULT])
  354 dnl ------------------------------------------------------
  355 dnl
  356 dnl Convenience macro to run AM_CONDITIONAL and AC_DEFINE after
  357 dnl PKG_WITH_MODULES check. HAVE_[VARIABLE-PREFIX] is exported as make
  358 dnl and preprocessor variable.
  359 AC_DEFUN([PKG_HAVE_DEFINE_WITH_MODULES],
  360 [
  361 PKG_HAVE_WITH_MODULES([$1],[$2],[$3],[$4])
  362 
  363 AS_IF([test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"],
  364         [AC_DEFINE([HAVE_][$1], 1, [Enable ]m4_tolower([$1])[ support])])
  365 ])dnl PKG_HAVE_DEFINE_WITH_MODULES
  366 
  367 # Copyright (C) 2002-2021 Free Software Foundation, Inc.
  368 #
  369 # This file is free software; the Free Software Foundation
  370 # gives unlimited permission to copy and/or distribute it,
  371 # with or without modifications, as long as this notice is preserved.
  372 
  373 # AM_AUTOMAKE_VERSION(VERSION)
  374 # ----------------------------
  375 # Automake X.Y traces this macro to ensure aclocal.m4 has been
  376 # generated from the m4 files accompanying Automake X.Y.
  377 # (This private macro should not be called outside this file.)
  378 AC_DEFUN([AM_AUTOMAKE_VERSION],
  379 [am__api_version='1.16'
  380 dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
  381 dnl require some minimum version.  Point them to the right macro.
  382 m4_if([$1], [1.16.5], [],
  383       [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
  384 ])
  385 
  386 # _AM_AUTOCONF_VERSION(VERSION)
  387 # -----------------------------
  388 # aclocal traces this macro to find the Autoconf version.
  389 # This is a private macro too.  Using m4_define simplifies
  390 # the logic in aclocal, which can simply ignore this definition.
  391 m4_define([_AM_AUTOCONF_VERSION], [])
  392 
  393 # AM_SET_CURRENT_AUTOMAKE_VERSION
  394 # -------------------------------
  395 # Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.
  396 # This function is AC_REQUIREd by AM_INIT_AUTOMAKE.
  397 AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
  398 [AM_AUTOMAKE_VERSION([1.16.5])dnl
  399 m4_ifndef([AC_AUTOCONF_VERSION],
  400   [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
  401 _AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])
  402 
  403 # AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-
  404 
  405 # Copyright (C) 2001-2021 Free Software Foundation, Inc.
  406 #
  407 # This file is free software; the Free Software Foundation
  408 # gives unlimited permission to copy and/or distribute it,
  409 # with or without modifications, as long as this notice is preserved.
  410 
  411 # For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets
  412 # $ac_aux_dir to '$srcdir/foo'.  In other projects, it is set to
  413 # '$srcdir', '$srcdir/..', or '$srcdir/../..'.
  414 #
  415 # Of course, Automake must honor this variable whenever it calls a
  416 # tool from the auxiliary directory.  The problem is that $srcdir (and
  417 # therefore $ac_aux_dir as well) can be either absolute or relative,
  418 # depending on how configure is run.  This is pretty annoying, since
  419 # it makes $ac_aux_dir quite unusable in subdirectories: in the top
  420 # source directory, any form will work fine, but in subdirectories a
  421 # relative path needs to be adjusted first.
  422 #
  423 # $ac_aux_dir/missing
  424 #    fails when called from a subdirectory if $ac_aux_dir is relative
  425 # $top_srcdir/$ac_aux_dir/missing
  426 #    fails if $ac_aux_dir is absolute,
  427 #    fails when called from a subdirectory in a VPATH build with
  428 #          a relative $ac_aux_dir
  429 #
  430 # The reason of the latter failure is that $top_srcdir and $ac_aux_dir
  431 # are both prefixed by $srcdir.  In an in-source build this is usually
  432 # harmless because $srcdir is '.', but things will broke when you
  433 # start a VPATH build or use an absolute $srcdir.
  434 #
  435 # So we could use something similar to $top_srcdir/$ac_aux_dir/missing,
  436 # iff we strip the leading $srcdir from $ac_aux_dir.  That would be:
  437 #   am_aux_dir='\$(top_srcdir)/'`expr "$ac_aux_dir" : "$srcdir//*\(.*\)"`
  438 # and then we would define $MISSING as
  439 #   MISSING="\${SHELL} $am_aux_dir/missing"
  440 # This will work as long as MISSING is not called from configure, because
  441 # unfortunately $(top_srcdir) has no meaning in configure.
  442 # However there are other variables, like CC, which are often used in
  443 # configure, and could therefore not use this "fixed" $ac_aux_dir.
  444 #
  445 # Another solution, used here, is to always expand $ac_aux_dir to an
  446 # absolute PATH.  The drawback is that using absolute paths prevent a
  447 # configured tree to be moved without reconfiguration.
  448 
  449 AC_DEFUN([AM_AUX_DIR_EXPAND],
  450 [AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
  451 # Expand $ac_aux_dir to an absolute path.
  452 am_aux_dir=`cd "$ac_aux_dir" && pwd`
  453 ])
  454 
  455 # AM_CONDITIONAL                                            -*- Autoconf -*-
  456 
  457 # Copyright (C) 1997-2021 Free Software Foundation, Inc.
  458 #
  459 # This file is free software; the Free Software Foundation
  460 # gives unlimited permission to copy and/or distribute it,
  461 # with or without modifications, as long as this notice is preserved.
  462 
  463 # AM_CONDITIONAL(NAME, SHELL-CONDITION)
  464 # -------------------------------------
  465 # Define a conditional.
  466 AC_DEFUN([AM_CONDITIONAL],
  467 [AC_PREREQ([2.52])dnl
  468  m4_if([$1], [TRUE],  [AC_FATAL([$0: invalid condition: $1])],
  469        [$1], [FALSE], [AC_FATAL([$0: invalid condition: $1])])dnl
  470 AC_SUBST([$1_TRUE])dnl
  471 AC_SUBST([$1_FALSE])dnl
  472 _AM_SUBST_NOTMAKE([$1_TRUE])dnl
  473 _AM_SUBST_NOTMAKE([$1_FALSE])dnl
  474 m4_define([_AM_COND_VALUE_$1], [$2])dnl
  475 if $2; then
  476   $1_TRUE=
  477   $1_FALSE='#'
  478 else
  479   $1_TRUE='#'
  480   $1_FALSE=
  481 fi
  482 AC_CONFIG_COMMANDS_PRE(
  483 [if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then
  484   AC_MSG_ERROR([[conditional "$1" was never defined.
  485 Usually this means the macro was only invoked conditionally.]])
  486 fi])])
  487 
  488 # Copyright (C) 1999-2021 Free Software Foundation, Inc.
  489 #
  490 # This file is free software; the Free Software Foundation
  491 # gives unlimited permission to copy and/or distribute it,
  492 # with or without modifications, as long as this notice is preserved.
  493 
  494 
  495 # There are a few dirty hacks below to avoid letting 'AC_PROG_CC' be
  496 # written in clear, in which case automake, when reading aclocal.m4,
  497 # will think it sees a *use*, and therefore will trigger all it's
  498 # C support machinery.  Also note that it means that autoscan, seeing
  499 # CC etc. in the Makefile, will ask for an AC_PROG_CC use...
  500 
  501 
  502 # _AM_DEPENDENCIES(NAME)
  503 # ----------------------
  504 # See how the compiler implements dependency checking.
  505 # NAME is "CC", "CXX", "OBJC", "OBJCXX", "UPC", or "GJC".
  506 # We try a few techniques and use that to set a single cache variable.
  507 #
  508 # We don't AC_REQUIRE the corresponding AC_PROG_CC since the latter was
  509 # modified to invoke _AM_DEPENDENCIES(CC); we would have a circular
  510 # dependency, and given that the user is not expected to run this macro,
  511 # just rely on AC_PROG_CC.
  512 AC_DEFUN([_AM_DEPENDENCIES],
  513 [AC_REQUIRE([AM_SET_DEPDIR])dnl
  514 AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl
  515 AC_REQUIRE([AM_MAKE_INCLUDE])dnl
  516 AC_REQUIRE([AM_DEP_TRACK])dnl
  517 
  518 m4_if([$1], [CC],   [depcc="$CC"   am_compiler_list=],
  519       [$1], [CXX],  [depcc="$CXX"  am_compiler_list=],
  520       [$1], [OBJC], [depcc="$OBJC" am_compiler_list='gcc3 gcc'],
  521       [$1], [OBJCXX], [depcc="$OBJCXX" am_compiler_list='gcc3 gcc'],
  522       [$1], [UPC],  [depcc="$UPC"  am_compiler_list=],
  523       [$1], [GCJ],  [depcc="$GCJ"  am_compiler_list='gcc3 gcc'],
  524                     [depcc="$$1"   am_compiler_list=])
  525 
  526 AC_CACHE_CHECK([dependency style of $depcc],
  527                [am_cv_$1_dependencies_compiler_type],
  528 [if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
  529   # We make a subdir and do the tests there.  Otherwise we can end up
  530   # making bogus files that we don't know about and never remove.  For
  531   # instance it was reported that on HP-UX the gcc test will end up
  532   # making a dummy file named 'D' -- because '-MD' means "put the output
  533   # in D".
  534   rm -rf conftest.dir
  535   mkdir conftest.dir
  536   # Copy depcomp to subdir because otherwise we won't find it if we're
  537   # using a relative directory.
  538   cp "$am_depcomp" conftest.dir
  539   cd conftest.dir
  540   # We will build objects and dependencies in a subdirectory because
  541   # it helps to detect inapplicable dependency modes.  For instance
  542   # both Tru64's cc and ICC support -MD to output dependencies as a
  543   # side effect of compilation, but ICC will put the dependencies in
  544   # the current directory while Tru64 will put them in the object
  545   # directory.
  546   mkdir sub
  547 
  548   am_cv_$1_dependencies_compiler_type=none
  549   if test "$am_compiler_list" = ""; then
  550      am_compiler_list=`sed -n ['s/^#*\([a-zA-Z0-9]*\))$/\1/p'] < ./depcomp`
  551   fi
  552   am__universal=false
  553   m4_case([$1], [CC],
  554     [case " $depcc " in #(
  555      *\ -arch\ *\ -arch\ *) am__universal=true ;;
  556      esac],
  557     [CXX],
  558     [case " $depcc " in #(
  559      *\ -arch\ *\ -arch\ *) am__universal=true ;;
  560      esac])
  561 
  562   for depmode in $am_compiler_list; do
  563     # Setup a source with many dependencies, because some compilers
  564     # like to wrap large dependency lists on column 80 (with \), and
  565     # we should not choose a depcomp mode which is confused by this.
  566     #
  567     # We need to recreate these files for each test, as the compiler may
  568     # overwrite some of them when testing with obscure command lines.
  569     # This happens at least with the AIX C compiler.
  570     : > sub/conftest.c
  571     for i in 1 2 3 4 5 6; do
  572       echo '#include "conftst'$i'.h"' >> sub/conftest.c
  573       # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
  574       # Solaris 10 /bin/sh.
  575       echo '/* dummy */' > sub/conftst$i.h
  576     done
  577     echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
  578 
  579     # We check with '-c' and '-o' for the sake of the "dashmstdout"
  580     # mode.  It turns out that the SunPro C++ compiler does not properly
  581     # handle '-M -o', and we need to detect this.  Also, some Intel
  582     # versions had trouble with output in subdirs.
  583     am__obj=sub/conftest.${OBJEXT-o}
  584     am__minus_obj="-o $am__obj"
  585     case $depmode in
  586     gcc)
  587       # This depmode causes a compiler race in universal mode.
  588       test "$am__universal" = false || continue
  589       ;;
  590     nosideeffect)
  591       # After this tag, mechanisms are not by side-effect, so they'll
  592       # only be used when explicitly requested.
  593       if test "x$enable_dependency_tracking" = xyes; then
  594 	continue
  595       else
  596 	break
  597       fi
  598       ;;
  599     msvc7 | msvc7msys | msvisualcpp | msvcmsys)
  600       # This compiler won't grok '-c -o', but also, the minuso test has
  601       # not run yet.  These depmodes are late enough in the game, and
  602       # so weak that their functioning should not be impacted.
  603       am__obj=conftest.${OBJEXT-o}
  604       am__minus_obj=
  605       ;;
  606     none) break ;;
  607     esac
  608     if depmode=$depmode \
  609        source=sub/conftest.c object=$am__obj \
  610        depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
  611        $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
  612          >/dev/null 2>conftest.err &&
  613        grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
  614        grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
  615        grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
  616        ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
  617       # icc doesn't choke on unknown options, it will just issue warnings
  618       # or remarks (even with -Werror).  So we grep stderr for any message
  619       # that says an option was ignored or not supported.
  620       # When given -MP, icc 7.0 and 7.1 complain thusly:
  621       #   icc: Command line warning: ignoring option '-M'; no argument required
  622       # The diagnosis changed in icc 8.0:
  623       #   icc: Command line remark: option '-MP' not supported
  624       if (grep 'ignoring option' conftest.err ||
  625           grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
  626         am_cv_$1_dependencies_compiler_type=$depmode
  627         break
  628       fi
  629     fi
  630   done
  631 
  632   cd ..
  633   rm -rf conftest.dir
  634 else
  635   am_cv_$1_dependencies_compiler_type=none
  636 fi
  637 ])
  638 AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
  639 AM_CONDITIONAL([am__fastdep$1], [
  640   test "x$enable_dependency_tracking" != xno \
  641   && test "$am_cv_$1_dependencies_compiler_type" = gcc3])
  642 ])
  643 
  644 
  645 # AM_SET_DEPDIR
  646 # -------------
  647 # Choose a directory name for dependency files.
  648 # This macro is AC_REQUIREd in _AM_DEPENDENCIES.
  649 AC_DEFUN([AM_SET_DEPDIR],
  650 [AC_REQUIRE([AM_SET_LEADING_DOT])dnl
  651 AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
  652 ])
  653 
  654 
  655 # AM_DEP_TRACK
  656 # ------------
  657 AC_DEFUN([AM_DEP_TRACK],
  658 [AC_ARG_ENABLE([dependency-tracking], [dnl
  659 AS_HELP_STRING(
  660   [--enable-dependency-tracking],
  661   [do not reject slow dependency extractors])
  662 AS_HELP_STRING(
  663   [--disable-dependency-tracking],
  664   [speeds up one-time build])])
  665 if test "x$enable_dependency_tracking" != xno; then
  666   am_depcomp="$ac_aux_dir/depcomp"
  667   AMDEPBACKSLASH='\'
  668   am__nodep='_no'
  669 fi
  670 AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno])
  671 AC_SUBST([AMDEPBACKSLASH])dnl
  672 _AM_SUBST_NOTMAKE([AMDEPBACKSLASH])dnl
  673 AC_SUBST([am__nodep])dnl
  674 _AM_SUBST_NOTMAKE([am__nodep])dnl
  675 ])
  676 
  677 # Generate code to set up dependency tracking.              -*- Autoconf -*-
  678 
  679 # Copyright (C) 1999-2021 Free Software Foundation, Inc.
  680 #
  681 # This file is free software; the Free Software Foundation
  682 # gives unlimited permission to copy and/or distribute it,
  683 # with or without modifications, as long as this notice is preserved.
  684 
  685 # _AM_OUTPUT_DEPENDENCY_COMMANDS
  686 # ------------------------------
  687 AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
  688 [{
  689   # Older Autoconf quotes --file arguments for eval, but not when files
  690   # are listed without --file.  Let's play safe and only enable the eval
  691   # if we detect the quoting.
  692   # TODO: see whether this extra hack can be removed once we start
  693   # requiring Autoconf 2.70 or later.
  694   AS_CASE([$CONFIG_FILES],
  695           [*\'*], [eval set x "$CONFIG_FILES"],
  696           [*], [set x $CONFIG_FILES])
  697   shift
  698   # Used to flag and report bootstrapping failures.
  699   am_rc=0
  700   for am_mf
  701   do
  702     # Strip MF so we end up with the name of the file.
  703     am_mf=`AS_ECHO(["$am_mf"]) | sed -e 's/:.*$//'`
  704     # Check whether this is an Automake generated Makefile which includes
  705     # dependency-tracking related rules and includes.
  706     # Grep'ing the whole file directly is not great: AIX grep has a line
  707     # limit of 2048, but all sed's we know have understand at least 4000.
  708     sed -n 's,^am--depfiles:.*,X,p' "$am_mf" | grep X >/dev/null 2>&1 \
  709       || continue
  710     am_dirpart=`AS_DIRNAME(["$am_mf"])`
  711     am_filepart=`AS_BASENAME(["$am_mf"])`
  712     AM_RUN_LOG([cd "$am_dirpart" \
  713       && sed -e '/# am--include-marker/d' "$am_filepart" \
  714         | $MAKE -f - am--depfiles]) || am_rc=$?
  715   done
  716   if test $am_rc -ne 0; then
  717     AC_MSG_FAILURE([Something went wrong bootstrapping makefile fragments
  718     for automatic dependency tracking.  If GNU make was not used, consider
  719     re-running the configure script with MAKE="gmake" (or whatever is
  720     necessary).  You can also try re-running configure with the
  721     '--disable-dependency-tracking' option to at least be able to build
  722     the package (albeit without support for automatic dependency tracking).])
  723   fi
  724   AS_UNSET([am_dirpart])
  725   AS_UNSET([am_filepart])
  726   AS_UNSET([am_mf])
  727   AS_UNSET([am_rc])
  728   rm -f conftest-deps.mk
  729 }
  730 ])# _AM_OUTPUT_DEPENDENCY_COMMANDS
  731 
  732 
  733 # AM_OUTPUT_DEPENDENCY_COMMANDS
  734 # -----------------------------
  735 # This macro should only be invoked once -- use via AC_REQUIRE.
  736 #
  737 # This code is only required when automatic dependency tracking is enabled.
  738 # This creates each '.Po' and '.Plo' makefile fragment that we'll need in
  739 # order to bootstrap the dependency handling code.
  740 AC_DEFUN([AM_OUTPUT_DEPENDENCY_COMMANDS],
  741 [AC_CONFIG_COMMANDS([depfiles],
  742      [test x"$AMDEP_TRUE" != x"" || _AM_OUTPUT_DEPENDENCY_COMMANDS],
  743      [AMDEP_TRUE="$AMDEP_TRUE" MAKE="${MAKE-make}"])])
  744 
  745 # Do all the work for Automake.                             -*- Autoconf -*-
  746 
  747 # Copyright (C) 1996-2021 Free Software Foundation, Inc.
  748 #
  749 # This file is free software; the Free Software Foundation
  750 # gives unlimited permission to copy and/or distribute it,
  751 # with or without modifications, as long as this notice is preserved.
  752 
  753 # This macro actually does too much.  Some checks are only needed if
  754 # your package does certain things.  But this isn't really a big deal.
  755 
  756 dnl Redefine AC_PROG_CC to automatically invoke _AM_PROG_CC_C_O.
  757 m4_define([AC_PROG_CC],
  758 m4_defn([AC_PROG_CC])
  759 [_AM_PROG_CC_C_O
  760 ])
  761 
  762 # AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
  763 # AM_INIT_AUTOMAKE([OPTIONS])
  764 # -----------------------------------------------
  765 # The call with PACKAGE and VERSION arguments is the old style
  766 # call (pre autoconf-2.50), which is being phased out.  PACKAGE
  767 # and VERSION should now be passed to AC_INIT and removed from
  768 # the call to AM_INIT_AUTOMAKE.
  769 # We support both call styles for the transition.  After
  770 # the next Automake release, Autoconf can make the AC_INIT
  771 # arguments mandatory, and then we can depend on a new Autoconf
  772 # release and drop the old call support.
  773 AC_DEFUN([AM_INIT_AUTOMAKE],
  774 [AC_PREREQ([2.65])dnl
  775 m4_ifdef([_$0_ALREADY_INIT],
  776   [m4_fatal([$0 expanded multiple times
  777 ]m4_defn([_$0_ALREADY_INIT]))],
  778   [m4_define([_$0_ALREADY_INIT], m4_expansion_stack)])dnl
  779 dnl Autoconf wants to disallow AM_ names.  We explicitly allow
  780 dnl the ones we care about.
  781 m4_pattern_allow([^AM_[A-Z]+FLAGS$])dnl
  782 AC_REQUIRE([AM_SET_CURRENT_AUTOMAKE_VERSION])dnl
  783 AC_REQUIRE([AC_PROG_INSTALL])dnl
  784 if test "`cd $srcdir && pwd`" != "`pwd`"; then
  785   # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
  786   # is not polluted with repeated "-I."
  787   AC_SUBST([am__isrc], [' -I$(srcdir)'])_AM_SUBST_NOTMAKE([am__isrc])dnl
  788   # test to see if srcdir already configured
  789   if test -f $srcdir/config.status; then
  790     AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
  791   fi
  792 fi
  793 
  794 # test whether we have cygpath
  795 if test -z "$CYGPATH_W"; then
  796   if (cygpath --version) >/dev/null 2>/dev/null; then
  797     CYGPATH_W='cygpath -w'
  798   else
  799     CYGPATH_W=echo
  800   fi
  801 fi
  802 AC_SUBST([CYGPATH_W])
  803 
  804 # Define the identity of the package.
  805 dnl Distinguish between old-style and new-style calls.
  806 m4_ifval([$2],
  807 [AC_DIAGNOSE([obsolete],
  808              [$0: two- and three-arguments forms are deprecated.])
  809 m4_ifval([$3], [_AM_SET_OPTION([no-define])])dnl
  810  AC_SUBST([PACKAGE], [$1])dnl
  811  AC_SUBST([VERSION], [$2])],
  812 [_AM_SET_OPTIONS([$1])dnl
  813 dnl Diagnose old-style AC_INIT with new-style AM_AUTOMAKE_INIT.
  814 m4_if(
  815   m4_ifset([AC_PACKAGE_NAME], [ok]):m4_ifset([AC_PACKAGE_VERSION], [ok]),
  816   [ok:ok],,
  817   [m4_fatal([AC_INIT should be called with package and version arguments])])dnl
  818  AC_SUBST([PACKAGE], ['AC_PACKAGE_TARNAME'])dnl
  819  AC_SUBST([VERSION], ['AC_PACKAGE_VERSION'])])dnl
  820 
  821 _AM_IF_OPTION([no-define],,
  822 [AC_DEFINE_UNQUOTED([PACKAGE], ["$PACKAGE"], [Name of package])
  823  AC_DEFINE_UNQUOTED([VERSION], ["$VERSION"], [Version number of package])])dnl
  824 
  825 # Some tools Automake needs.
  826 AC_REQUIRE([AM_SANITY_CHECK])dnl
  827 AC_REQUIRE([AC_ARG_PROGRAM])dnl
  828 AM_MISSING_PROG([ACLOCAL], [aclocal-${am__api_version}])
  829 AM_MISSING_PROG([AUTOCONF], [autoconf])
  830 AM_MISSING_PROG([AUTOMAKE], [automake-${am__api_version}])
  831 AM_MISSING_PROG([AUTOHEADER], [autoheader])
  832 AM_MISSING_PROG([MAKEINFO], [makeinfo])
  833 AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
  834 AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
  835 AC_REQUIRE([AC_PROG_MKDIR_P])dnl
  836 # For better backward compatibility.  To be removed once Automake 1.9.x
  837 # dies out for good.  For more background, see:
  838 # <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
  839 # <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
  840 AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
  841 # We need awk for the "check" target (and possibly the TAP driver).  The
  842 # system "awk" is bad on some platforms.
  843 AC_REQUIRE([AC_PROG_AWK])dnl
  844 AC_REQUIRE([AC_PROG_MAKE_SET])dnl
  845 AC_REQUIRE([AM_SET_LEADING_DOT])dnl
  846 _AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])],
  847 	      [_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])],
  848 			     [_AM_PROG_TAR([v7])])])
  849 _AM_IF_OPTION([no-dependencies],,
  850 [AC_PROVIDE_IFELSE([AC_PROG_CC],
  851 		  [_AM_DEPENDENCIES([CC])],
  852 		  [m4_define([AC_PROG_CC],
  853 			     m4_defn([AC_PROG_CC])[_AM_DEPENDENCIES([CC])])])dnl
  854 AC_PROVIDE_IFELSE([AC_PROG_CXX],
  855 		  [_AM_DEPENDENCIES([CXX])],
  856 		  [m4_define([AC_PROG_CXX],
  857 			     m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl
  858 AC_PROVIDE_IFELSE([AC_PROG_OBJC],
  859 		  [_AM_DEPENDENCIES([OBJC])],
  860 		  [m4_define([AC_PROG_OBJC],
  861 			     m4_defn([AC_PROG_OBJC])[_AM_DEPENDENCIES([OBJC])])])dnl
  862 AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
  863 		  [_AM_DEPENDENCIES([OBJCXX])],
  864 		  [m4_define([AC_PROG_OBJCXX],
  865 			     m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
  866 ])
  867 # Variables for tags utilities; see am/tags.am
  868 if test -z "$CTAGS"; then
  869   CTAGS=ctags
  870 fi
  871 AC_SUBST([CTAGS])
  872 if test -z "$ETAGS"; then
  873   ETAGS=etags
  874 fi
  875 AC_SUBST([ETAGS])
  876 if test -z "$CSCOPE"; then
  877   CSCOPE=cscope
  878 fi
  879 AC_SUBST([CSCOPE])
  880 
  881 AC_REQUIRE([AM_SILENT_RULES])dnl
  882 dnl The testsuite driver may need to know about EXEEXT, so add the
  883 dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen.  This
  884 dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below.
  885 AC_CONFIG_COMMANDS_PRE(dnl
  886 [m4_provide_if([_AM_COMPILER_EXEEXT],
  887   [AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
  888 
  889 # POSIX will say in a future version that running "rm -f" with no argument
  890 # is OK; and we want to be able to make that assumption in our Makefile
  891 # recipes.  So use an aggressive probe to check that the usage we want is
  892 # actually supported "in the wild" to an acceptable degree.
  893 # See automake bug#10828.
  894 # To make any issue more visible, cause the running configure to be aborted
  895 # by default if the 'rm' program in use doesn't match our expectations; the
  896 # user can still override this though.
  897 if rm -f && rm -fr && rm -rf; then : OK; else
  898   cat >&2 <<'END'
  899 Oops!
  900 
  901 Your 'rm' program seems unable to run without file operands specified
  902 on the command line, even when the '-f' option is present.  This is contrary
  903 to the behaviour of most rm programs out there, and not conforming with
  904 the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
  905 
  906 Please tell bug-automake@gnu.org about your system, including the value
  907 of your $PATH and any error possibly output before this message.  This
  908 can help us improve future automake versions.
  909 
  910 END
  911   if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
  912     echo 'Configuration will proceed anyway, since you have set the' >&2
  913     echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
  914     echo >&2
  915   else
  916     cat >&2 <<'END'
  917 Aborting the configuration process, to ensure you take notice of the issue.
  918 
  919 You can download and install GNU coreutils to get an 'rm' implementation
  920 that behaves properly: <https://www.gnu.org/software/coreutils/>.
  921 
  922 If you want to complete the configuration process using your problematic
  923 'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
  924 to "yes", and re-run configure.
  925 
  926 END
  927     AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
  928   fi
  929 fi
  930 dnl The trailing newline in this macro's definition is deliberate, for
  931 dnl backward compatibility and to allow trailing 'dnl'-style comments
  932 dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
  933 ])
  934 
  935 dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
  936 dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
  937 dnl mangled by Autoconf and run in a shell conditional statement.
  938 m4_define([_AC_COMPILER_EXEEXT],
  939 m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
  940 
  941 # When config.status generates a header, we must update the stamp-h file.
  942 # This file resides in the same directory as the config header
  943 # that is generated.  The stamp files are numbered to have different names.
  944 
  945 # Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
  946 # loop where config.status creates the headers, so we can generate
  947 # our stamp files there.
  948 AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
  949 [# Compute $1's index in $config_headers.
  950 _am_arg=$1
  951 _am_stamp_count=1
  952 for _am_header in $config_headers :; do
  953   case $_am_header in
  954     $_am_arg | $_am_arg:* )
  955       break ;;
  956     * )
  957       _am_stamp_count=`expr $_am_stamp_count + 1` ;;
  958   esac
  959 done
  960 echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
  961 
  962 # Copyright (C) 2001-2021 Free Software Foundation, Inc.
  963 #
  964 # This file is free software; the Free Software Foundation
  965 # gives unlimited permission to copy and/or distribute it,
  966 # with or without modifications, as long as this notice is preserved.
  967 
  968 # AM_PROG_INSTALL_SH
  969 # ------------------
  970 # Define $install_sh.
  971 AC_DEFUN([AM_PROG_INSTALL_SH],
  972 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
  973 if test x"${install_sh+set}" != xset; then
  974   case $am_aux_dir in
  975   *\ * | *\	*)
  976     install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
  977   *)
  978     install_sh="\${SHELL} $am_aux_dir/install-sh"
  979   esac
  980 fi
  981 AC_SUBST([install_sh])])
  982 
  983 # Copyright (C) 2003-2021 Free Software Foundation, Inc.
  984 #
  985 # This file is free software; the Free Software Foundation
  986 # gives unlimited permission to copy and/or distribute it,
  987 # with or without modifications, as long as this notice is preserved.
  988 
  989 # Check whether the underlying file-system supports filenames
  990 # with a leading dot.  For instance MS-DOS doesn't.
  991 AC_DEFUN([AM_SET_LEADING_DOT],
  992 [rm -rf .tst 2>/dev/null
  993 mkdir .tst 2>/dev/null
  994 if test -d .tst; then
  995   am__leading_dot=.
  996 else
  997   am__leading_dot=_
  998 fi
  999 rmdir .tst 2>/dev/null
 1000 AC_SUBST([am__leading_dot])])
 1001 
 1002 # Add --enable-maintainer-mode option to configure.         -*- Autoconf -*-
 1003 # From Jim Meyering
 1004 
 1005 # Copyright (C) 1996-2021 Free Software Foundation, Inc.
 1006 #
 1007 # This file is free software; the Free Software Foundation
 1008 # gives unlimited permission to copy and/or distribute it,
 1009 # with or without modifications, as long as this notice is preserved.
 1010 
 1011 # AM_MAINTAINER_MODE([DEFAULT-MODE])
 1012 # ----------------------------------
 1013 # Control maintainer-specific portions of Makefiles.
 1014 # Default is to disable them, unless 'enable' is passed literally.
 1015 # For symmetry, 'disable' may be passed as well.  Anyway, the user
 1016 # can override the default with the --enable/--disable switch.
 1017 AC_DEFUN([AM_MAINTAINER_MODE],
 1018 [m4_case(m4_default([$1], [disable]),
 1019        [enable], [m4_define([am_maintainer_other], [disable])],
 1020        [disable], [m4_define([am_maintainer_other], [enable])],
 1021        [m4_define([am_maintainer_other], [enable])
 1022         m4_warn([syntax], [unexpected argument to AM@&t@_MAINTAINER_MODE: $1])])
 1023 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
 1024   dnl maintainer-mode's default is 'disable' unless 'enable' is passed
 1025   AC_ARG_ENABLE([maintainer-mode],
 1026     [AS_HELP_STRING([--]am_maintainer_other[-maintainer-mode],
 1027       am_maintainer_other[ make rules and dependencies not useful
 1028       (and sometimes confusing) to the casual installer])],
 1029     [USE_MAINTAINER_MODE=$enableval],
 1030     [USE_MAINTAINER_MODE=]m4_if(am_maintainer_other, [enable], [no], [yes]))
 1031   AC_MSG_RESULT([$USE_MAINTAINER_MODE])
 1032   AM_CONDITIONAL([MAINTAINER_MODE], [test $USE_MAINTAINER_MODE = yes])
 1033   MAINT=$MAINTAINER_MODE_TRUE
 1034   AC_SUBST([MAINT])dnl
 1035 ]
 1036 )
 1037 
 1038 # Check to see how 'make' treats includes.	            -*- Autoconf -*-
 1039 
 1040 # Copyright (C) 2001-2021 Free Software Foundation, Inc.
 1041 #
 1042 # This file is free software; the Free Software Foundation
 1043 # gives unlimited permission to copy and/or distribute it,
 1044 # with or without modifications, as long as this notice is preserved.
 1045 
 1046 # AM_MAKE_INCLUDE()
 1047 # -----------------
 1048 # Check whether make has an 'include' directive that can support all
 1049 # the idioms we need for our automatic dependency tracking code.
 1050 AC_DEFUN([AM_MAKE_INCLUDE],
 1051 [AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive])
 1052 cat > confinc.mk << 'END'
 1053 am__doit:
 1054 	@echo this is the am__doit target >confinc.out
 1055 .PHONY: am__doit
 1056 END
 1057 am__include="#"
 1058 am__quote=
 1059 # BSD make does it like this.
 1060 echo '.include "confinc.mk" # ignored' > confmf.BSD
 1061 # Other make implementations (GNU, Solaris 10, AIX) do it like this.
 1062 echo 'include confinc.mk # ignored' > confmf.GNU
 1063 _am_result=no
 1064 for s in GNU BSD; do
 1065   AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out])
 1066   AS_CASE([$?:`cat confinc.out 2>/dev/null`],
 1067       ['0:this is the am__doit target'],
 1068       [AS_CASE([$s],
 1069           [BSD], [am__include='.include' am__quote='"'],
 1070           [am__include='include' am__quote=''])])
 1071   if test "$am__include" != "#"; then
 1072     _am_result="yes ($s style)"
 1073     break
 1074   fi
 1075 done
 1076 rm -f confinc.* confmf.*
 1077 AC_MSG_RESULT([${_am_result}])
 1078 AC_SUBST([am__include])])
 1079 AC_SUBST([am__quote])])
 1080 
 1081 # Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-
 1082 
 1083 # Copyright (C) 1997-2021 Free Software Foundation, Inc.
 1084 #
 1085 # This file is free software; the Free Software Foundation
 1086 # gives unlimited permission to copy and/or distribute it,
 1087 # with or without modifications, as long as this notice is preserved.
 1088 
 1089 # AM_MISSING_PROG(NAME, PROGRAM)
 1090 # ------------------------------
 1091 AC_DEFUN([AM_MISSING_PROG],
 1092 [AC_REQUIRE([AM_MISSING_HAS_RUN])
 1093 $1=${$1-"${am_missing_run}$2"}
 1094 AC_SUBST($1)])
 1095 
 1096 # AM_MISSING_HAS_RUN
 1097 # ------------------
 1098 # Define MISSING if not defined so far and test if it is modern enough.
 1099 # If it is, set am_missing_run to use it, otherwise, to nothing.
 1100 AC_DEFUN([AM_MISSING_HAS_RUN],
 1101 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
 1102 AC_REQUIRE_AUX_FILE([missing])dnl
 1103 if test x"${MISSING+set}" != xset; then
 1104   MISSING="\${SHELL} '$am_aux_dir/missing'"
 1105 fi
 1106 # Use eval to expand $SHELL
 1107 if eval "$MISSING --is-lightweight"; then
 1108   am_missing_run="$MISSING "
 1109 else
 1110   am_missing_run=
 1111   AC_MSG_WARN(['missing' script is too old or missing])
 1112 fi
 1113 ])
 1114 
 1115 # Helper functions for option handling.                     -*- Autoconf -*-
 1116 
 1117 # Copyright (C) 2001-2021 Free Software Foundation, Inc.
 1118 #
 1119 # This file is free software; the Free Software Foundation
 1120 # gives unlimited permission to copy and/or distribute it,
 1121 # with or without modifications, as long as this notice is preserved.
 1122 
 1123 # _AM_MANGLE_OPTION(NAME)
 1124 # -----------------------
 1125 AC_DEFUN([_AM_MANGLE_OPTION],
 1126 [[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
 1127 
 1128 # _AM_SET_OPTION(NAME)
 1129 # --------------------
 1130 # Set option NAME.  Presently that only means defining a flag for this option.
 1131 AC_DEFUN([_AM_SET_OPTION],
 1132 [m4_define(_AM_MANGLE_OPTION([$1]), [1])])
 1133 
 1134 # _AM_SET_OPTIONS(OPTIONS)
 1135 # ------------------------
 1136 # OPTIONS is a space-separated list of Automake options.
 1137 AC_DEFUN([_AM_SET_OPTIONS],
 1138 [m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
 1139 
 1140 # _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
 1141 # -------------------------------------------
 1142 # Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
 1143 AC_DEFUN([_AM_IF_OPTION],
 1144 [m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
 1145 
 1146 # Copyright (C) 1999-2021 Free Software Foundation, Inc.
 1147 #
 1148 # This file is free software; the Free Software Foundation
 1149 # gives unlimited permission to copy and/or distribute it,
 1150 # with or without modifications, as long as this notice is preserved.
 1151 
 1152 # _AM_PROG_CC_C_O
 1153 # ---------------
 1154 # Like AC_PROG_CC_C_O, but changed for automake.  We rewrite AC_PROG_CC
 1155 # to automatically call this.
 1156 AC_DEFUN([_AM_PROG_CC_C_O],
 1157 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
 1158 AC_REQUIRE_AUX_FILE([compile])dnl
 1159 AC_LANG_PUSH([C])dnl
 1160 AC_CACHE_CHECK(
 1161   [whether $CC understands -c and -o together],
 1162   [am_cv_prog_cc_c_o],
 1163   [AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
 1164   # Make sure it works both with $CC and with simple cc.
 1165   # Following AC_PROG_CC_C_O, we do the test twice because some
 1166   # compilers refuse to overwrite an existing .o file with -o,
 1167   # though they will create one.
 1168   am_cv_prog_cc_c_o=yes
 1169   for am_i in 1 2; do
 1170     if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
 1171          && test -f conftest2.$ac_objext; then
 1172       : OK
 1173     else
 1174       am_cv_prog_cc_c_o=no
 1175       break
 1176     fi
 1177   done
 1178   rm -f core conftest*
 1179   unset am_i])
 1180 if test "$am_cv_prog_cc_c_o" != yes; then
 1181    # Losing compiler, so override with the script.
 1182    # FIXME: It is wrong to rewrite CC.
 1183    # But if we don't then we get into trouble of one sort or another.
 1184    # A longer-term fix would be to have automake use am__CC in this case,
 1185    # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
 1186    CC="$am_aux_dir/compile $CC"
 1187 fi
 1188 AC_LANG_POP([C])])
 1189 
 1190 # For backward compatibility.
 1191 AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
 1192 
 1193 # Copyright (C) 2001-2021 Free Software Foundation, Inc.
 1194 #
 1195 # This file is free software; the Free Software Foundation
 1196 # gives unlimited permission to copy and/or distribute it,
 1197 # with or without modifications, as long as this notice is preserved.
 1198 
 1199 # AM_RUN_LOG(COMMAND)
 1200 # -------------------
 1201 # Run COMMAND, save the exit status in ac_status, and log it.
 1202 # (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
 1203 AC_DEFUN([AM_RUN_LOG],
 1204 [{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
 1205    ($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
 1206    ac_status=$?
 1207    echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
 1208    (exit $ac_status); }])
 1209 
 1210 # Check to make sure that the build environment is sane.    -*- Autoconf -*-
 1211 
 1212 # Copyright (C) 1996-2021 Free Software Foundation, Inc.
 1213 #
 1214 # This file is free software; the Free Software Foundation
 1215 # gives unlimited permission to copy and/or distribute it,
 1216 # with or without modifications, as long as this notice is preserved.
 1217 
 1218 # AM_SANITY_CHECK
 1219 # ---------------
 1220 AC_DEFUN([AM_SANITY_CHECK],
 1221 [AC_MSG_CHECKING([whether build environment is sane])
 1222 # Reject unsafe characters in $srcdir or the absolute working directory
 1223 # name.  Accept space and tab only in the latter.
 1224 am_lf='
 1225 '
 1226 case `pwd` in
 1227   *[[\\\"\#\$\&\'\`$am_lf]]*)
 1228     AC_MSG_ERROR([unsafe absolute working directory name]);;
 1229 esac
 1230 case $srcdir in
 1231   *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
 1232     AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
 1233 esac
 1234 
 1235 # Do 'set' in a subshell so we don't clobber the current shell's
 1236 # arguments.  Must try -L first in case configure is actually a
 1237 # symlink; some systems play weird games with the mod time of symlinks
 1238 # (eg FreeBSD returns the mod time of the symlink's containing
 1239 # directory).
 1240 if (
 1241    am_has_slept=no
 1242    for am_try in 1 2; do
 1243      echo "timestamp, slept: $am_has_slept" > conftest.file
 1244      set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
 1245      if test "$[*]" = "X"; then
 1246 	# -L didn't work.
 1247 	set X `ls -t "$srcdir/configure" conftest.file`
 1248      fi
 1249      if test "$[*]" != "X $srcdir/configure conftest.file" \
 1250 	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
 1251 
 1252 	# If neither matched, then we have a broken ls.  This can happen
 1253 	# if, for instance, CONFIG_SHELL is bash and it inherits a
 1254 	# broken ls alias from the environment.  This has actually
 1255 	# happened.  Such a system could not be considered "sane".
 1256 	AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
 1257   alias in your environment])
 1258      fi
 1259      if test "$[2]" = conftest.file || test $am_try -eq 2; then
 1260        break
 1261      fi
 1262      # Just in case.
 1263      sleep 1
 1264      am_has_slept=yes
 1265    done
 1266    test "$[2]" = conftest.file
 1267    )
 1268 then
 1269    # Ok.
 1270    :
 1271 else
 1272    AC_MSG_ERROR([newly created file is older than distributed files!
 1273 Check your system clock])
 1274 fi
 1275 AC_MSG_RESULT([yes])
 1276 # If we didn't sleep, we still need to ensure time stamps of config.status and
 1277 # generated files are strictly newer.
 1278 am_sleep_pid=
 1279 if grep 'slept: no' conftest.file >/dev/null 2>&1; then
 1280   ( sleep 1 ) &
 1281   am_sleep_pid=$!
 1282 fi
 1283 AC_CONFIG_COMMANDS_PRE(
 1284   [AC_MSG_CHECKING([that generated files are newer than configure])
 1285    if test -n "$am_sleep_pid"; then
 1286      # Hide warnings about reused PIDs.
 1287      wait $am_sleep_pid 2>/dev/null
 1288    fi
 1289    AC_MSG_RESULT([done])])
 1290 rm -f conftest.file
 1291 ])
 1292 
 1293 # Copyright (C) 2009-2021 Free Software Foundation, Inc.
 1294 #
 1295 # This file is free software; the Free Software Foundation
 1296 # gives unlimited permission to copy and/or distribute it,
 1297 # with or without modifications, as long as this notice is preserved.
 1298 
 1299 # AM_SILENT_RULES([DEFAULT])
 1300 # --------------------------
 1301 # Enable less verbose build rules; with the default set to DEFAULT
 1302 # ("yes" being less verbose, "no" or empty being verbose).
 1303 AC_DEFUN([AM_SILENT_RULES],
 1304 [AC_ARG_ENABLE([silent-rules], [dnl
 1305 AS_HELP_STRING(
 1306   [--enable-silent-rules],
 1307   [less verbose build output (undo: "make V=1")])
 1308 AS_HELP_STRING(
 1309   [--disable-silent-rules],
 1310   [verbose build output (undo: "make V=0")])dnl
 1311 ])
 1312 case $enable_silent_rules in @%:@ (((
 1313   yes) AM_DEFAULT_VERBOSITY=0;;
 1314    no) AM_DEFAULT_VERBOSITY=1;;
 1315     *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
 1316 esac
 1317 dnl
 1318 dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
 1319 dnl do not support nested variable expansions.
 1320 dnl See automake bug#9928 and bug#10237.
 1321 am_make=${MAKE-make}
 1322 AC_CACHE_CHECK([whether $am_make supports nested variables],
 1323    [am_cv_make_support_nested_variables],
 1324    [if AS_ECHO([['TRUE=$(BAR$(V))
 1325 BAR0=false
 1326 BAR1=true
 1327 V=1
 1328 am__doit:
 1329 	@$(TRUE)
 1330 .PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
 1331   am_cv_make_support_nested_variables=yes
 1332 else
 1333   am_cv_make_support_nested_variables=no
 1334 fi])
 1335 if test $am_cv_make_support_nested_variables = yes; then
 1336   dnl Using '$V' instead of '$(V)' breaks IRIX make.
 1337   AM_V='$(V)'
 1338   AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
 1339 else
 1340   AM_V=$AM_DEFAULT_VERBOSITY
 1341   AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
 1342 fi
 1343 AC_SUBST([AM_V])dnl
 1344 AM_SUBST_NOTMAKE([AM_V])dnl
 1345 AC_SUBST([AM_DEFAULT_V])dnl
 1346 AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
 1347 AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
 1348 AM_BACKSLASH='\'
 1349 AC_SUBST([AM_BACKSLASH])dnl
 1350 _AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
 1351 ])
 1352 
 1353 # Copyright (C) 2001-2021 Free Software Foundation, Inc.
 1354 #
 1355 # This file is free software; the Free Software Foundation
 1356 # gives unlimited permission to copy and/or distribute it,
 1357 # with or without modifications, as long as this notice is preserved.
 1358 
 1359 # AM_PROG_INSTALL_STRIP
 1360 # ---------------------
 1361 # One issue with vendor 'install' (even GNU) is that you can't
 1362 # specify the program used to strip binaries.  This is especially
 1363 # annoying in cross-compiling environments, where the build's strip
 1364 # is unlikely to handle the host's binaries.
 1365 # Fortunately install-sh will honor a STRIPPROG variable, so we
 1366 # always use install-sh in "make install-strip", and initialize
 1367 # STRIPPROG with the value of the STRIP variable (set by the user).
 1368 AC_DEFUN([AM_PROG_INSTALL_STRIP],
 1369 [AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
 1370 # Installed binaries are usually stripped using 'strip' when the user
 1371 # run "make install-strip".  However 'strip' might not be the right
 1372 # tool to use in cross-compilation environments, therefore Automake
 1373 # will honor the 'STRIP' environment variable to overrule this program.
 1374 dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
 1375 if test "$cross_compiling" != no; then
 1376   AC_CHECK_TOOL([STRIP], [strip], :)
 1377 fi
 1378 INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
 1379 AC_SUBST([INSTALL_STRIP_PROGRAM])])
 1380 
 1381 # Copyright (C) 2006-2021 Free Software Foundation, Inc.
 1382 #
 1383 # This file is free software; the Free Software Foundation
 1384 # gives unlimited permission to copy and/or distribute it,
 1385 # with or without modifications, as long as this notice is preserved.
 1386 
 1387 # _AM_SUBST_NOTMAKE(VARIABLE)
 1388 # ---------------------------
 1389 # Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
 1390 # This macro is traced by Automake.
 1391 AC_DEFUN([_AM_SUBST_NOTMAKE])
 1392 
 1393 # AM_SUBST_NOTMAKE(VARIABLE)
 1394 # --------------------------
 1395 # Public sister of _AM_SUBST_NOTMAKE.
 1396 AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
 1397 
 1398 # Check how to create a tarball.                            -*- Autoconf -*-
 1399 
 1400 # Copyright (C) 2004-2021 Free Software Foundation, Inc.
 1401 #
 1402 # This file is free software; the Free Software Foundation
 1403 # gives unlimited permission to copy and/or distribute it,
 1404 # with or without modifications, as long as this notice is preserved.
 1405 
 1406 # _AM_PROG_TAR(FORMAT)
 1407 # --------------------
 1408 # Check how to create a tarball in format FORMAT.
 1409 # FORMAT should be one of 'v7', 'ustar', or 'pax'.
 1410 #
 1411 # Substitute a variable $(am__tar) that is a command
 1412 # writing to stdout a FORMAT-tarball containing the directory
 1413 # $tardir.
 1414 #     tardir=directory && $(am__tar) > result.tar
 1415 #
 1416 # Substitute a variable $(am__untar) that extract such
 1417 # a tarball read from stdin.
 1418 #     $(am__untar) < result.tar
 1419 #
 1420 AC_DEFUN([_AM_PROG_TAR],
 1421 [# Always define AMTAR for backward compatibility.  Yes, it's still used
 1422 # in the wild :-(  We should find a proper way to deprecate it ...
 1423 AC_SUBST([AMTAR], ['$${TAR-tar}'])
 1424 
 1425 # We'll loop over all known methods to create a tar archive until one works.
 1426 _am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
 1427 
 1428 m4_if([$1], [v7],
 1429   [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
 1430 
 1431   [m4_case([$1],
 1432     [ustar],
 1433      [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
 1434       # There is notably a 21 bits limit for the UID and the GID.  In fact,
 1435       # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
 1436       # and bug#13588).
 1437       am_max_uid=2097151 # 2^21 - 1
 1438       am_max_gid=$am_max_uid
 1439       # The $UID and $GID variables are not portable, so we need to resort
 1440       # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
 1441       # below are definitely unexpected, so allow the users to see them
 1442       # (that is, avoid stderr redirection).
 1443       am_uid=`id -u || echo unknown`
 1444       am_gid=`id -g || echo unknown`
 1445       AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
 1446       if test $am_uid -le $am_max_uid; then
 1447          AC_MSG_RESULT([yes])
 1448       else
 1449          AC_MSG_RESULT([no])
 1450          _am_tools=none
 1451       fi
 1452       AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
 1453       if test $am_gid -le $am_max_gid; then
 1454          AC_MSG_RESULT([yes])
 1455       else
 1456         AC_MSG_RESULT([no])
 1457         _am_tools=none
 1458       fi],
 1459 
 1460   [pax],
 1461     [],
 1462 
 1463   [m4_fatal([Unknown tar format])])
 1464 
 1465   AC_MSG_CHECKING([how to create a $1 tar archive])
 1466 
 1467   # Go ahead even if we have the value already cached.  We do so because we
 1468   # need to set the values for the 'am__tar' and 'am__untar' variables.
 1469   _am_tools=${am_cv_prog_tar_$1-$_am_tools}
 1470 
 1471   for _am_tool in $_am_tools; do
 1472     case $_am_tool in
 1473     gnutar)
 1474       for _am_tar in tar gnutar gtar; do
 1475         AM_RUN_LOG([$_am_tar --version]) && break
 1476       done
 1477       am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
 1478       am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
 1479       am__untar="$_am_tar -xf -"
 1480       ;;
 1481     plaintar)
 1482       # Must skip GNU tar: if it does not support --format= it doesn't create
 1483       # ustar tarball either.
 1484       (tar --version) >/dev/null 2>&1 && continue
 1485       am__tar='tar chf - "$$tardir"'
 1486       am__tar_='tar chf - "$tardir"'
 1487       am__untar='tar xf -'
 1488       ;;
 1489     pax)
 1490       am__tar='pax -L -x $1 -w "$$tardir"'
 1491       am__tar_='pax -L -x $1 -w "$tardir"'
 1492       am__untar='pax -r'
 1493       ;;
 1494     cpio)
 1495       am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
 1496       am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
 1497       am__untar='cpio -i -H $1 -d'
 1498       ;;
 1499     none)
 1500       am__tar=false
 1501       am__tar_=false
 1502       am__untar=false
 1503       ;;
 1504     esac
 1505 
 1506     # If the value was cached, stop now.  We just wanted to have am__tar
 1507     # and am__untar set.
 1508     test -n "${am_cv_prog_tar_$1}" && break
 1509 
 1510     # tar/untar a dummy directory, and stop if the command works.
 1511     rm -rf conftest.dir
 1512     mkdir conftest.dir
 1513     echo GrepMe > conftest.dir/file
 1514     AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
 1515     rm -rf conftest.dir
 1516     if test -s conftest.tar; then
 1517       AM_RUN_LOG([$am__untar <conftest.tar])
 1518       AM_RUN_LOG([cat conftest.dir/file])
 1519       grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
 1520     fi
 1521   done
 1522   rm -rf conftest.dir
 1523 
 1524   AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
 1525   AC_MSG_RESULT([$am_cv_prog_tar_$1])])
 1526 
 1527 AC_SUBST([am__tar])
 1528 AC_SUBST([am__untar])
 1529 ]) # _AM_PROG_TAR
 1530