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    1 # generated automatically by aclocal 1.15.1 -*- Autoconf -*-
    2 
    3 # Copyright (C) 1996-2017 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]), [2.69],,
   18 [m4_warning([this file was generated for autoconf 2.69.
   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 12 (pkg-config-0.29.2)
   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], [0.29.2])
   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 $2])
  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 # Copyright (C) 2002-2017 Free Software Foundation, Inc.
  300 #
  301 # This file is free software; the Free Software Foundation
  302 # gives unlimited permission to copy and/or distribute it,
  303 # with or without modifications, as long as this notice is preserved.
  304 
  305 # AM_AUTOMAKE_VERSION(VERSION)
  306 # ----------------------------
  307 # Automake X.Y traces this macro to ensure aclocal.m4 has been
  308 # generated from the m4 files accompanying Automake X.Y.
  309 # (This private macro should not be called outside this file.)
  310 AC_DEFUN([AM_AUTOMAKE_VERSION],
  311 [am__api_version='1.15'
  312 dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
  313 dnl require some minimum version.  Point them to the right macro.
  314 m4_if([$1], [1.15.1], [],
  315       [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
  316 ])
  317 
  318 # _AM_AUTOCONF_VERSION(VERSION)
  319 # -----------------------------
  320 # aclocal traces this macro to find the Autoconf version.
  321 # This is a private macro too.  Using m4_define simplifies
  322 # the logic in aclocal, which can simply ignore this definition.
  323 m4_define([_AM_AUTOCONF_VERSION], [])
  324 
  325 # AM_SET_CURRENT_AUTOMAKE_VERSION
  326 # -------------------------------
  327 # Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.
  328 # This function is AC_REQUIREd by AM_INIT_AUTOMAKE.
  329 AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
  330 [AM_AUTOMAKE_VERSION([1.15.1])dnl
  331 m4_ifndef([AC_AUTOCONF_VERSION],
  332   [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
  333 _AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])
  334 
  335 # Copyright (C) 2011-2017 Free Software Foundation, Inc.
  336 #
  337 # This file is free software; the Free Software Foundation
  338 # gives unlimited permission to copy and/or distribute it,
  339 # with or without modifications, as long as this notice is preserved.
  340 
  341 # AM_PROG_AR([ACT-IF-FAIL])
  342 # -------------------------
  343 # Try to determine the archiver interface, and trigger the ar-lib wrapper
  344 # if it is needed.  If the detection of archiver interface fails, run
  345 # ACT-IF-FAIL (default is to abort configure with a proper error message).
  346 AC_DEFUN([AM_PROG_AR],
  347 [AC_BEFORE([$0], [LT_INIT])dnl
  348 AC_BEFORE([$0], [AC_PROG_LIBTOOL])dnl
  349 AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
  350 AC_REQUIRE_AUX_FILE([ar-lib])dnl
  351 AC_CHECK_TOOLS([AR], [ar lib "link -lib"], [false])
  352 : ${AR=ar}
  353 
  354 AC_CACHE_CHECK([the archiver ($AR) interface], [am_cv_ar_interface],
  355   [AC_LANG_PUSH([C])
  356    am_cv_ar_interface=ar
  357    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int some_variable = 0;]])],
  358      [am_ar_try='$AR cru libconftest.a conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
  359       AC_TRY_EVAL([am_ar_try])
  360       if test "$ac_status" -eq 0; then
  361         am_cv_ar_interface=ar
  362       else
  363         am_ar_try='$AR -NOLOGO -OUT:conftest.lib conftest.$ac_objext >&AS_MESSAGE_LOG_FD'
  364         AC_TRY_EVAL([am_ar_try])
  365         if test "$ac_status" -eq 0; then
  366           am_cv_ar_interface=lib
  367         else
  368           am_cv_ar_interface=unknown
  369         fi
  370       fi
  371       rm -f conftest.lib libconftest.a
  372      ])
  373    AC_LANG_POP([C])])
  374 
  375 case $am_cv_ar_interface in
  376 ar)
  377   ;;
  378 lib)
  379   # Microsoft lib, so override with the ar-lib wrapper script.
  380   # FIXME: It is wrong to rewrite AR.
  381   # But if we don't then we get into trouble of one sort or another.
  382   # A longer-term fix would be to have automake use am__AR in this case,
  383   # and then we could set am__AR="$am_aux_dir/ar-lib \$(AR)" or something
  384   # similar.
  385   AR="$am_aux_dir/ar-lib $AR"
  386   ;;
  387 unknown)
  388   m4_default([$1],
  389              [AC_MSG_ERROR([could not determine $AR interface])])
  390   ;;
  391 esac
  392 AC_SUBST([AR])dnl
  393 ])
  394 
  395 # AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-
  396 
  397 # Copyright (C) 2001-2017 Free Software Foundation, Inc.
  398 #
  399 # This file is free software; the Free Software Foundation
  400 # gives unlimited permission to copy and/or distribute it,
  401 # with or without modifications, as long as this notice is preserved.
  402 
  403 # For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets
  404 # $ac_aux_dir to '$srcdir/foo'.  In other projects, it is set to
  405 # '$srcdir', '$srcdir/..', or '$srcdir/../..'.
  406 #
  407 # Of course, Automake must honor this variable whenever it calls a
  408 # tool from the auxiliary directory.  The problem is that $srcdir (and
  409 # therefore $ac_aux_dir as well) can be either absolute or relative,
  410 # depending on how configure is run.  This is pretty annoying, since
  411 # it makes $ac_aux_dir quite unusable in subdirectories: in the top
  412 # source directory, any form will work fine, but in subdirectories a
  413 # relative path needs to be adjusted first.
  414 #
  415 # $ac_aux_dir/missing
  416 #    fails when called from a subdirectory if $ac_aux_dir is relative
  417 # $top_srcdir/$ac_aux_dir/missing
  418 #    fails if $ac_aux_dir is absolute,
  419 #    fails when called from a subdirectory in a VPATH build with
  420 #          a relative $ac_aux_dir
  421 #
  422 # The reason of the latter failure is that $top_srcdir and $ac_aux_dir
  423 # are both prefixed by $srcdir.  In an in-source build this is usually
  424 # harmless because $srcdir is '.', but things will broke when you
  425 # start a VPATH build or use an absolute $srcdir.
  426 #
  427 # So we could use something similar to $top_srcdir/$ac_aux_dir/missing,
  428 # iff we strip the leading $srcdir from $ac_aux_dir.  That would be:
  429 #   am_aux_dir='\$(top_srcdir)/'`expr "$ac_aux_dir" : "$srcdir//*\(.*\)"`
  430 # and then we would define $MISSING as
  431 #   MISSING="\${SHELL} $am_aux_dir/missing"
  432 # This will work as long as MISSING is not called from configure, because
  433 # unfortunately $(top_srcdir) has no meaning in configure.
  434 # However there are other variables, like CC, which are often used in
  435 # configure, and could therefore not use this "fixed" $ac_aux_dir.
  436 #
  437 # Another solution, used here, is to always expand $ac_aux_dir to an
  438 # absolute PATH.  The drawback is that using absolute paths prevent a
  439 # configured tree to be moved without reconfiguration.
  440 
  441 AC_DEFUN([AM_AUX_DIR_EXPAND],
  442 [AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
  443 # Expand $ac_aux_dir to an absolute path.
  444 am_aux_dir=`cd "$ac_aux_dir" && pwd`
  445 ])
  446 
  447 # AM_CONDITIONAL                                            -*- Autoconf -*-
  448 
  449 # Copyright (C) 1997-2017 Free Software Foundation, Inc.
  450 #
  451 # This file is free software; the Free Software Foundation
  452 # gives unlimited permission to copy and/or distribute it,
  453 # with or without modifications, as long as this notice is preserved.
  454 
  455 # AM_CONDITIONAL(NAME, SHELL-CONDITION)
  456 # -------------------------------------
  457 # Define a conditional.
  458 AC_DEFUN([AM_CONDITIONAL],
  459 [AC_PREREQ([2.52])dnl
  460  m4_if([$1], [TRUE],  [AC_FATAL([$0: invalid condition: $1])],
  461        [$1], [FALSE], [AC_FATAL([$0: invalid condition: $1])])dnl
  462 AC_SUBST([$1_TRUE])dnl
  463 AC_SUBST([$1_FALSE])dnl
  464 _AM_SUBST_NOTMAKE([$1_TRUE])dnl
  465 _AM_SUBST_NOTMAKE([$1_FALSE])dnl
  466 m4_define([_AM_COND_VALUE_$1], [$2])dnl
  467 if $2; then
  468   $1_TRUE=
  469   $1_FALSE='#'
  470 else
  471   $1_TRUE='#'
  472   $1_FALSE=
  473 fi
  474 AC_CONFIG_COMMANDS_PRE(
  475 [if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then
  476   AC_MSG_ERROR([[conditional "$1" was never defined.
  477 Usually this means the macro was only invoked conditionally.]])
  478 fi])])
  479 
  480 # Copyright (C) 1999-2017 Free Software Foundation, Inc.
  481 #
  482 # This file is free software; the Free Software Foundation
  483 # gives unlimited permission to copy and/or distribute it,
  484 # with or without modifications, as long as this notice is preserved.
  485 
  486 
  487 # There are a few dirty hacks below to avoid letting 'AC_PROG_CC' be
  488 # written in clear, in which case automake, when reading aclocal.m4,
  489 # will think it sees a *use*, and therefore will trigger all it's
  490 # C support machinery.  Also note that it means that autoscan, seeing
  491 # CC etc. in the Makefile, will ask for an AC_PROG_CC use...
  492 
  493 
  494 # _AM_DEPENDENCIES(NAME)
  495 # ----------------------
  496 # See how the compiler implements dependency checking.
  497 # NAME is "CC", "CXX", "OBJC", "OBJCXX", "UPC", or "GJC".
  498 # We try a few techniques and use that to set a single cache variable.
  499 #
  500 # We don't AC_REQUIRE the corresponding AC_PROG_CC since the latter was
  501 # modified to invoke _AM_DEPENDENCIES(CC); we would have a circular
  502 # dependency, and given that the user is not expected to run this macro,
  503 # just rely on AC_PROG_CC.
  504 AC_DEFUN([_AM_DEPENDENCIES],
  505 [AC_REQUIRE([AM_SET_DEPDIR])dnl
  506 AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl
  507 AC_REQUIRE([AM_MAKE_INCLUDE])dnl
  508 AC_REQUIRE([AM_DEP_TRACK])dnl
  509 
  510 m4_if([$1], [CC],   [depcc="$CC"   am_compiler_list=],
  511       [$1], [CXX],  [depcc="$CXX"  am_compiler_list=],
  512       [$1], [OBJC], [depcc="$OBJC" am_compiler_list='gcc3 gcc'],
  513       [$1], [OBJCXX], [depcc="$OBJCXX" am_compiler_list='gcc3 gcc'],
  514       [$1], [UPC],  [depcc="$UPC"  am_compiler_list=],
  515       [$1], [GCJ],  [depcc="$GCJ"  am_compiler_list='gcc3 gcc'],
  516                     [depcc="$$1"   am_compiler_list=])
  517 
  518 AC_CACHE_CHECK([dependency style of $depcc],
  519                [am_cv_$1_dependencies_compiler_type],
  520 [if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
  521   # We make a subdir and do the tests there.  Otherwise we can end up
  522   # making bogus files that we don't know about and never remove.  For
  523   # instance it was reported that on HP-UX the gcc test will end up
  524   # making a dummy file named 'D' -- because '-MD' means "put the output
  525   # in D".
  526   rm -rf conftest.dir
  527   mkdir conftest.dir
  528   # Copy depcomp to subdir because otherwise we won't find it if we're
  529   # using a relative directory.
  530   cp "$am_depcomp" conftest.dir
  531   cd conftest.dir
  532   # We will build objects and dependencies in a subdirectory because
  533   # it helps to detect inapplicable dependency modes.  For instance
  534   # both Tru64's cc and ICC support -MD to output dependencies as a
  535   # side effect of compilation, but ICC will put the dependencies in
  536   # the current directory while Tru64 will put them in the object
  537   # directory.
  538   mkdir sub
  539 
  540   am_cv_$1_dependencies_compiler_type=none
  541   if test "$am_compiler_list" = ""; then
  542      am_compiler_list=`sed -n ['s/^#*\([a-zA-Z0-9]*\))$/\1/p'] < ./depcomp`
  543   fi
  544   am__universal=false
  545   m4_case([$1], [CC],
  546     [case " $depcc " in #(
  547      *\ -arch\ *\ -arch\ *) am__universal=true ;;
  548      esac],
  549     [CXX],
  550     [case " $depcc " in #(
  551      *\ -arch\ *\ -arch\ *) am__universal=true ;;
  552      esac])
  553 
  554   for depmode in $am_compiler_list; do
  555     # Setup a source with many dependencies, because some compilers
  556     # like to wrap large dependency lists on column 80 (with \), and
  557     # we should not choose a depcomp mode which is confused by this.
  558     #
  559     # We need to recreate these files for each test, as the compiler may
  560     # overwrite some of them when testing with obscure command lines.
  561     # This happens at least with the AIX C compiler.
  562     : > sub/conftest.c
  563     for i in 1 2 3 4 5 6; do
  564       echo '#include "conftst'$i'.h"' >> sub/conftest.c
  565       # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
  566       # Solaris 10 /bin/sh.
  567       echo '/* dummy */' > sub/conftst$i.h
  568     done
  569     echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
  570 
  571     # We check with '-c' and '-o' for the sake of the "dashmstdout"
  572     # mode.  It turns out that the SunPro C++ compiler does not properly
  573     # handle '-M -o', and we need to detect this.  Also, some Intel
  574     # versions had trouble with output in subdirs.
  575     am__obj=sub/conftest.${OBJEXT-o}
  576     am__minus_obj="-o $am__obj"
  577     case $depmode in
  578     gcc)
  579       # This depmode causes a compiler race in universal mode.
  580       test "$am__universal" = false || continue
  581       ;;
  582     nosideeffect)
  583       # After this tag, mechanisms are not by side-effect, so they'll
  584       # only be used when explicitly requested.
  585       if test "x$enable_dependency_tracking" = xyes; then
  586 	continue
  587       else
  588 	break
  589       fi
  590       ;;
  591     msvc7 | msvc7msys | msvisualcpp | msvcmsys)
  592       # This compiler won't grok '-c -o', but also, the minuso test has
  593       # not run yet.  These depmodes are late enough in the game, and
  594       # so weak that their functioning should not be impacted.
  595       am__obj=conftest.${OBJEXT-o}
  596       am__minus_obj=
  597       ;;
  598     none) break ;;
  599     esac
  600     if depmode=$depmode \
  601        source=sub/conftest.c object=$am__obj \
  602        depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
  603        $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
  604          >/dev/null 2>conftest.err &&
  605        grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
  606        grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
  607        grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
  608        ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
  609       # icc doesn't choke on unknown options, it will just issue warnings
  610       # or remarks (even with -Werror).  So we grep stderr for any message
  611       # that says an option was ignored or not supported.
  612       # When given -MP, icc 7.0 and 7.1 complain thusly:
  613       #   icc: Command line warning: ignoring option '-M'; no argument required
  614       # The diagnosis changed in icc 8.0:
  615       #   icc: Command line remark: option '-MP' not supported
  616       if (grep 'ignoring option' conftest.err ||
  617           grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
  618         am_cv_$1_dependencies_compiler_type=$depmode
  619         break
  620       fi
  621     fi
  622   done
  623 
  624   cd ..
  625   rm -rf conftest.dir
  626 else
  627   am_cv_$1_dependencies_compiler_type=none
  628 fi
  629 ])
  630 AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
  631 AM_CONDITIONAL([am__fastdep$1], [
  632   test "x$enable_dependency_tracking" != xno \
  633   && test "$am_cv_$1_dependencies_compiler_type" = gcc3])
  634 ])
  635 
  636 
  637 # AM_SET_DEPDIR
  638 # -------------
  639 # Choose a directory name for dependency files.
  640 # This macro is AC_REQUIREd in _AM_DEPENDENCIES.
  641 AC_DEFUN([AM_SET_DEPDIR],
  642 [AC_REQUIRE([AM_SET_LEADING_DOT])dnl
  643 AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
  644 ])
  645 
  646 
  647 # AM_DEP_TRACK
  648 # ------------
  649 AC_DEFUN([AM_DEP_TRACK],
  650 [AC_ARG_ENABLE([dependency-tracking], [dnl
  651 AS_HELP_STRING(
  652   [--enable-dependency-tracking],
  653   [do not reject slow dependency extractors])
  654 AS_HELP_STRING(
  655   [--disable-dependency-tracking],
  656   [speeds up one-time build])])
  657 if test "x$enable_dependency_tracking" != xno; then
  658   am_depcomp="$ac_aux_dir/depcomp"
  659   AMDEPBACKSLASH='\'
  660   am__nodep='_no'
  661 fi
  662 AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno])
  663 AC_SUBST([AMDEPBACKSLASH])dnl
  664 _AM_SUBST_NOTMAKE([AMDEPBACKSLASH])dnl
  665 AC_SUBST([am__nodep])dnl
  666 _AM_SUBST_NOTMAKE([am__nodep])dnl
  667 ])
  668 
  669 # Generate code to set up dependency tracking.              -*- Autoconf -*-
  670 
  671 # Copyright (C) 1999-2017 Free Software Foundation, Inc.
  672 #
  673 # This file is free software; the Free Software Foundation
  674 # gives unlimited permission to copy and/or distribute it,
  675 # with or without modifications, as long as this notice is preserved.
  676 
  677 
  678 # _AM_OUTPUT_DEPENDENCY_COMMANDS
  679 # ------------------------------
  680 AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
  681 [{
  682   # Older Autoconf quotes --file arguments for eval, but not when files
  683   # are listed without --file.  Let's play safe and only enable the eval
  684   # if we detect the quoting.
  685   case $CONFIG_FILES in
  686   *\'*) eval set x "$CONFIG_FILES" ;;
  687   *)   set x $CONFIG_FILES ;;
  688   esac
  689   shift
  690   for mf
  691   do
  692     # Strip MF so we end up with the name of the file.
  693     mf=`echo "$mf" | sed -e 's/:.*$//'`
  694     # Check whether this is an Automake generated Makefile or not.
  695     # We used to match only the files named 'Makefile.in', but
  696     # some people rename them; so instead we look at the file content.
  697     # Grep'ing the first line is not enough: some people post-process
  698     # each Makefile.in and add a new line on top of each file to say so.
  699     # Grep'ing the whole file is not good either: AIX grep has a line
  700     # limit of 2048, but all sed's we know have understand at least 4000.
  701     if sed -n 's,^#.*generated by automake.*,X,p' "$mf" | grep X >/dev/null 2>&1; then
  702       dirpart=`AS_DIRNAME("$mf")`
  703     else
  704       continue
  705     fi
  706     # Extract the definition of DEPDIR, am__include, and am__quote
  707     # from the Makefile without running 'make'.
  708     DEPDIR=`sed -n 's/^DEPDIR = //p' < "$mf"`
  709     test -z "$DEPDIR" && continue
  710     am__include=`sed -n 's/^am__include = //p' < "$mf"`
  711     test -z "$am__include" && continue
  712     am__quote=`sed -n 's/^am__quote = //p' < "$mf"`
  713     # Find all dependency output files, they are included files with
  714     # $(DEPDIR) in their names.  We invoke sed twice because it is the
  715     # simplest approach to changing $(DEPDIR) to its actual value in the
  716     # expansion.
  717     for file in `sed -n "
  718       s/^$am__include $am__quote\(.*(DEPDIR).*\)$am__quote"'$/\1/p' <"$mf" | \
  719 	 sed -e 's/\$(DEPDIR)/'"$DEPDIR"'/g'`; do
  720       # Make sure the directory exists.
  721       test -f "$dirpart/$file" && continue
  722       fdir=`AS_DIRNAME(["$file"])`
  723       AS_MKDIR_P([$dirpart/$fdir])
  724       # echo "creating $dirpart/$file"
  725       echo '# dummy' > "$dirpart/$file"
  726     done
  727   done
  728 }
  729 ])# _AM_OUTPUT_DEPENDENCY_COMMANDS
  730 
  731 
  732 # AM_OUTPUT_DEPENDENCY_COMMANDS
  733 # -----------------------------
  734 # This macro should only be invoked once -- use via AC_REQUIRE.
  735 #
  736 # This code is only required when automatic dependency tracking
  737 # is enabled.  FIXME.  This creates each '.P' file that we will
  738 # need in order to bootstrap the dependency handling code.
  739 AC_DEFUN([AM_OUTPUT_DEPENDENCY_COMMANDS],
  740 [AC_CONFIG_COMMANDS([depfiles],
  741      [test x"$AMDEP_TRUE" != x"" || _AM_OUTPUT_DEPENDENCY_COMMANDS],
  742      [AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir"])
  743 ])
  744 
  745 # Do all the work for Automake.                             -*- Autoconf -*-
  746 
  747 # Copyright (C) 1996-2017 Free Software Foundation, Inc.
  748 #
  749 # This file is free software; the Free Software Foundation
  750 # gives unlimited permission to copy and/or distribute it,
  751 # with or without modifications, as long as this notice is preserved.
  752 
  753 # This macro actually does too much.  Some checks are only needed if
  754 # your package does certain things.  But this isn't really a big deal.
  755 
  756 dnl Redefine AC_PROG_CC to automatically invoke _AM_PROG_CC_C_O.
  757 m4_define([AC_PROG_CC],
  758 m4_defn([AC_PROG_CC])
  759 [_AM_PROG_CC_C_O
  760 ])
  761 
  762 # AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
  763 # AM_INIT_AUTOMAKE([OPTIONS])
  764 # -----------------------------------------------
  765 # The call with PACKAGE and VERSION arguments is the old style
  766 # call (pre autoconf-2.50), which is being phased out.  PACKAGE
  767 # and VERSION should now be passed to AC_INIT and removed from
  768 # the call to AM_INIT_AUTOMAKE.
  769 # We support both call styles for the transition.  After
  770 # the next Automake release, Autoconf can make the AC_INIT
  771 # arguments mandatory, and then we can depend on a new Autoconf
  772 # release and drop the old call support.
  773 AC_DEFUN([AM_INIT_AUTOMAKE],
  774 [AC_PREREQ([2.65])dnl
  775 dnl Autoconf wants to disallow AM_ names.  We explicitly allow
  776 dnl the ones we care about.
  777 m4_pattern_allow([^AM_[A-Z]+FLAGS$])dnl
  778 AC_REQUIRE([AM_SET_CURRENT_AUTOMAKE_VERSION])dnl
  779 AC_REQUIRE([AC_PROG_INSTALL])dnl
  780 if test "`cd $srcdir && pwd`" != "`pwd`"; then
  781   # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
  782   # is not polluted with repeated "-I."
  783   AC_SUBST([am__isrc], [' -I$(srcdir)'])_AM_SUBST_NOTMAKE([am__isrc])dnl
  784   # test to see if srcdir already configured
  785   if test -f $srcdir/config.status; then
  786     AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
  787   fi
  788 fi
  789 
  790 # test whether we have cygpath
  791 if test -z "$CYGPATH_W"; then
  792   if (cygpath --version) >/dev/null 2>/dev/null; then
  793     CYGPATH_W='cygpath -w'
  794   else
  795     CYGPATH_W=echo
  796   fi
  797 fi
  798 AC_SUBST([CYGPATH_W])
  799 
  800 # Define the identity of the package.
  801 dnl Distinguish between old-style and new-style calls.
  802 m4_ifval([$2],
  803 [AC_DIAGNOSE([obsolete],
  804              [$0: two- and three-arguments forms are deprecated.])
  805 m4_ifval([$3], [_AM_SET_OPTION([no-define])])dnl
  806  AC_SUBST([PACKAGE], [$1])dnl
  807  AC_SUBST([VERSION], [$2])],
  808 [_AM_SET_OPTIONS([$1])dnl
  809 dnl Diagnose old-style AC_INIT with new-style AM_AUTOMAKE_INIT.
  810 m4_if(
  811   m4_ifdef([AC_PACKAGE_NAME], [ok]):m4_ifdef([AC_PACKAGE_VERSION], [ok]),
  812   [ok:ok],,
  813   [m4_fatal([AC_INIT should be called with package and version arguments])])dnl
  814  AC_SUBST([PACKAGE], ['AC_PACKAGE_TARNAME'])dnl
  815  AC_SUBST([VERSION], ['AC_PACKAGE_VERSION'])])dnl
  816 
  817 _AM_IF_OPTION([no-define],,
  818 [AC_DEFINE_UNQUOTED([PACKAGE], ["$PACKAGE"], [Name of package])
  819  AC_DEFINE_UNQUOTED([VERSION], ["$VERSION"], [Version number of package])])dnl
  820 
  821 # Some tools Automake needs.
  822 AC_REQUIRE([AM_SANITY_CHECK])dnl
  823 AC_REQUIRE([AC_ARG_PROGRAM])dnl
  824 AM_MISSING_PROG([ACLOCAL], [aclocal-${am__api_version}])
  825 AM_MISSING_PROG([AUTOCONF], [autoconf])
  826 AM_MISSING_PROG([AUTOMAKE], [automake-${am__api_version}])
  827 AM_MISSING_PROG([AUTOHEADER], [autoheader])
  828 AM_MISSING_PROG([MAKEINFO], [makeinfo])
  829 AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
  830 AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
  831 AC_REQUIRE([AC_PROG_MKDIR_P])dnl
  832 # For better backward compatibility.  To be removed once Automake 1.9.x
  833 # dies out for good.  For more background, see:
  834 # <http://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
  835 # <http://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
  836 AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
  837 # We need awk for the "check" target (and possibly the TAP driver).  The
  838 # system "awk" is bad on some platforms.
  839 AC_REQUIRE([AC_PROG_AWK])dnl
  840 AC_REQUIRE([AC_PROG_MAKE_SET])dnl
  841 AC_REQUIRE([AM_SET_LEADING_DOT])dnl
  842 _AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])],
  843 	      [_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])],
  844 			     [_AM_PROG_TAR([v7])])])
  845 _AM_IF_OPTION([no-dependencies],,
  846 [AC_PROVIDE_IFELSE([AC_PROG_CC],
  847 		  [_AM_DEPENDENCIES([CC])],
  848 		  [m4_define([AC_PROG_CC],
  849 			     m4_defn([AC_PROG_CC])[_AM_DEPENDENCIES([CC])])])dnl
  850 AC_PROVIDE_IFELSE([AC_PROG_CXX],
  851 		  [_AM_DEPENDENCIES([CXX])],
  852 		  [m4_define([AC_PROG_CXX],
  853 			     m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl
  854 AC_PROVIDE_IFELSE([AC_PROG_OBJC],
  855 		  [_AM_DEPENDENCIES([OBJC])],
  856 		  [m4_define([AC_PROG_OBJC],
  857 			     m4_defn([AC_PROG_OBJC])[_AM_DEPENDENCIES([OBJC])])])dnl
  858 AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
  859 		  [_AM_DEPENDENCIES([OBJCXX])],
  860 		  [m4_define([AC_PROG_OBJCXX],
  861 			     m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
  862 ])
  863 AC_REQUIRE([AM_SILENT_RULES])dnl
  864 dnl The testsuite driver may need to know about EXEEXT, so add the
  865 dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen.  This
  866 dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below.
  867 AC_CONFIG_COMMANDS_PRE(dnl
  868 [m4_provide_if([_AM_COMPILER_EXEEXT],
  869   [AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
  870 
  871 # POSIX will say in a future version that running "rm -f" with no argument
  872 # is OK; and we want to be able to make that assumption in our Makefile
  873 # recipes.  So use an aggressive probe to check that the usage we want is
  874 # actually supported "in the wild" to an acceptable degree.
  875 # See automake bug#10828.
  876 # To make any issue more visible, cause the running configure to be aborted
  877 # by default if the 'rm' program in use doesn't match our expectations; the
  878 # user can still override this though.
  879 if rm -f && rm -fr && rm -rf; then : OK; else
  880   cat >&2 <<'END'
  881 Oops!
  882 
  883 Your 'rm' program seems unable to run without file operands specified
  884 on the command line, even when the '-f' option is present.  This is contrary
  885 to the behaviour of most rm programs out there, and not conforming with
  886 the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
  887 
  888 Please tell bug-automake@gnu.org about your system, including the value
  889 of your $PATH and any error possibly output before this message.  This
  890 can help us improve future automake versions.
  891 
  892 END
  893   if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
  894     echo 'Configuration will proceed anyway, since you have set the' >&2
  895     echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
  896     echo >&2
  897   else
  898     cat >&2 <<'END'
  899 Aborting the configuration process, to ensure you take notice of the issue.
  900 
  901 You can download and install GNU coreutils to get an 'rm' implementation
  902 that behaves properly: <http://www.gnu.org/software/coreutils/>.
  903 
  904 If you want to complete the configuration process using your problematic
  905 'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
  906 to "yes", and re-run configure.
  907 
  908 END
  909     AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
  910   fi
  911 fi
  912 dnl The trailing newline in this macro's definition is deliberate, for
  913 dnl backward compatibility and to allow trailing 'dnl'-style comments
  914 dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
  915 ])
  916 
  917 dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
  918 dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
  919 dnl mangled by Autoconf and run in a shell conditional statement.
  920 m4_define([_AC_COMPILER_EXEEXT],
  921 m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
  922 
  923 # When config.status generates a header, we must update the stamp-h file.
  924 # This file resides in the same directory as the config header
  925 # that is generated.  The stamp files are numbered to have different names.
  926 
  927 # Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
  928 # loop where config.status creates the headers, so we can generate
  929 # our stamp files there.
  930 AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
  931 [# Compute $1's index in $config_headers.
  932 _am_arg=$1
  933 _am_stamp_count=1
  934 for _am_header in $config_headers :; do
  935   case $_am_header in
  936     $_am_arg | $_am_arg:* )
  937       break ;;
  938     * )
  939       _am_stamp_count=`expr $_am_stamp_count + 1` ;;
  940   esac
  941 done
  942 echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
  943 
  944 # Copyright (C) 2001-2017 Free Software Foundation, Inc.
  945 #
  946 # This file is free software; the Free Software Foundation
  947 # gives unlimited permission to copy and/or distribute it,
  948 # with or without modifications, as long as this notice is preserved.
  949 
  950 # AM_PROG_INSTALL_SH
  951 # ------------------
  952 # Define $install_sh.
  953 AC_DEFUN([AM_PROG_INSTALL_SH],
  954 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
  955 if test x"${install_sh+set}" != xset; then
  956   case $am_aux_dir in
  957   *\ * | *\	*)
  958     install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
  959   *)
  960     install_sh="\${SHELL} $am_aux_dir/install-sh"
  961   esac
  962 fi
  963 AC_SUBST([install_sh])])
  964 
  965 # Copyright (C) 2003-2017 Free Software Foundation, Inc.
  966 #
  967 # This file is free software; the Free Software Foundation
  968 # gives unlimited permission to copy and/or distribute it,
  969 # with or without modifications, as long as this notice is preserved.
  970 
  971 # Check whether the underlying file-system supports filenames
  972 # with a leading dot.  For instance MS-DOS doesn't.
  973 AC_DEFUN([AM_SET_LEADING_DOT],
  974 [rm -rf .tst 2>/dev/null
  975 mkdir .tst 2>/dev/null
  976 if test -d .tst; then
  977   am__leading_dot=.
  978 else
  979   am__leading_dot=_
  980 fi
  981 rmdir .tst 2>/dev/null
  982 AC_SUBST([am__leading_dot])])
  983 
  984 # Check to see how 'make' treats includes.	            -*- Autoconf -*-
  985 
  986 # Copyright (C) 2001-2017 Free Software Foundation, Inc.
  987 #
  988 # This file is free software; the Free Software Foundation
  989 # gives unlimited permission to copy and/or distribute it,
  990 # with or without modifications, as long as this notice is preserved.
  991 
  992 # AM_MAKE_INCLUDE()
  993 # -----------------
  994 # Check to see how make treats includes.
  995 AC_DEFUN([AM_MAKE_INCLUDE],
  996 [am_make=${MAKE-make}
  997 cat > confinc << 'END'
  998 am__doit:
  999 	@echo this is the am__doit target
 1000 .PHONY: am__doit
 1001 END
 1002 # If we don't find an include directive, just comment out the code.
 1003 AC_MSG_CHECKING([for style of include used by $am_make])
 1004 am__include="#"
 1005 am__quote=
 1006 _am_result=none
 1007 # First try GNU make style include.
 1008 echo "include confinc" > confmf
 1009 # Ignore all kinds of additional output from 'make'.
 1010 case `$am_make -s -f confmf 2> /dev/null` in #(
 1011 *the\ am__doit\ target*)
 1012   am__include=include
 1013   am__quote=
 1014   _am_result=GNU
 1015   ;;
 1016 esac
 1017 # Now try BSD make style include.
 1018 if test "$am__include" = "#"; then
 1019    echo '.include "confinc"' > confmf
 1020    case `$am_make -s -f confmf 2> /dev/null` in #(
 1021    *the\ am__doit\ target*)
 1022      am__include=.include
 1023      am__quote="\""
 1024      _am_result=BSD
 1025      ;;
 1026    esac
 1027 fi
 1028 AC_SUBST([am__include])
 1029 AC_SUBST([am__quote])
 1030 AC_MSG_RESULT([$_am_result])
 1031 rm -f confinc confmf
 1032 ])
 1033 
 1034 # Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-
 1035 
 1036 # Copyright (C) 1997-2017 Free Software Foundation, Inc.
 1037 #
 1038 # This file is free software; the Free Software Foundation
 1039 # gives unlimited permission to copy and/or distribute it,
 1040 # with or without modifications, as long as this notice is preserved.
 1041 
 1042 # AM_MISSING_PROG(NAME, PROGRAM)
 1043 # ------------------------------
 1044 AC_DEFUN([AM_MISSING_PROG],
 1045 [AC_REQUIRE([AM_MISSING_HAS_RUN])
 1046 $1=${$1-"${am_missing_run}$2"}
 1047 AC_SUBST($1)])
 1048 
 1049 # AM_MISSING_HAS_RUN
 1050 # ------------------
 1051 # Define MISSING if not defined so far and test if it is modern enough.
 1052 # If it is, set am_missing_run to use it, otherwise, to nothing.
 1053 AC_DEFUN([AM_MISSING_HAS_RUN],
 1054 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
 1055 AC_REQUIRE_AUX_FILE([missing])dnl
 1056 if test x"${MISSING+set}" != xset; then
 1057   case $am_aux_dir in
 1058   *\ * | *\	*)
 1059     MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
 1060   *)
 1061     MISSING="\${SHELL} $am_aux_dir/missing" ;;
 1062   esac
 1063 fi
 1064 # Use eval to expand $SHELL
 1065 if eval "$MISSING --is-lightweight"; then
 1066   am_missing_run="$MISSING "
 1067 else
 1068   am_missing_run=
 1069   AC_MSG_WARN(['missing' script is too old or missing])
 1070 fi
 1071 ])
 1072 
 1073 # Helper functions for option handling.                     -*- Autoconf -*-
 1074 
 1075 # Copyright (C) 2001-2017 Free Software Foundation, Inc.
 1076 #
 1077 # This file is free software; the Free Software Foundation
 1078 # gives unlimited permission to copy and/or distribute it,
 1079 # with or without modifications, as long as this notice is preserved.
 1080 
 1081 # _AM_MANGLE_OPTION(NAME)
 1082 # -----------------------
 1083 AC_DEFUN([_AM_MANGLE_OPTION],
 1084 [[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
 1085 
 1086 # _AM_SET_OPTION(NAME)
 1087 # --------------------
 1088 # Set option NAME.  Presently that only means defining a flag for this option.
 1089 AC_DEFUN([_AM_SET_OPTION],
 1090 [m4_define(_AM_MANGLE_OPTION([$1]), [1])])
 1091 
 1092 # _AM_SET_OPTIONS(OPTIONS)
 1093 # ------------------------
 1094 # OPTIONS is a space-separated list of Automake options.
 1095 AC_DEFUN([_AM_SET_OPTIONS],
 1096 [m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
 1097 
 1098 # _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
 1099 # -------------------------------------------
 1100 # Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
 1101 AC_DEFUN([_AM_IF_OPTION],
 1102 [m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
 1103 
 1104 # Copyright (C) 1999-2017 Free Software Foundation, Inc.
 1105 #
 1106 # This file is free software; the Free Software Foundation
 1107 # gives unlimited permission to copy and/or distribute it,
 1108 # with or without modifications, as long as this notice is preserved.
 1109 
 1110 # _AM_PROG_CC_C_O
 1111 # ---------------
 1112 # Like AC_PROG_CC_C_O, but changed for automake.  We rewrite AC_PROG_CC
 1113 # to automatically call this.
 1114 AC_DEFUN([_AM_PROG_CC_C_O],
 1115 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
 1116 AC_REQUIRE_AUX_FILE([compile])dnl
 1117 AC_LANG_PUSH([C])dnl
 1118 AC_CACHE_CHECK(
 1119   [whether $CC understands -c and -o together],
 1120   [am_cv_prog_cc_c_o],
 1121   [AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
 1122   # Make sure it works both with $CC and with simple cc.
 1123   # Following AC_PROG_CC_C_O, we do the test twice because some
 1124   # compilers refuse to overwrite an existing .o file with -o,
 1125   # though they will create one.
 1126   am_cv_prog_cc_c_o=yes
 1127   for am_i in 1 2; do
 1128     if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
 1129          && test -f conftest2.$ac_objext; then
 1130       : OK
 1131     else
 1132       am_cv_prog_cc_c_o=no
 1133       break
 1134     fi
 1135   done
 1136   rm -f core conftest*
 1137   unset am_i])
 1138 if test "$am_cv_prog_cc_c_o" != yes; then
 1139    # Losing compiler, so override with the script.
 1140    # FIXME: It is wrong to rewrite CC.
 1141    # But if we don't then we get into trouble of one sort or another.
 1142    # A longer-term fix would be to have automake use am__CC in this case,
 1143    # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
 1144    CC="$am_aux_dir/compile $CC"
 1145 fi
 1146 AC_LANG_POP([C])])
 1147 
 1148 # For backward compatibility.
 1149 AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
 1150 
 1151 # Copyright (C) 2001-2017 Free Software Foundation, Inc.
 1152 #
 1153 # This file is free software; the Free Software Foundation
 1154 # gives unlimited permission to copy and/or distribute it,
 1155 # with or without modifications, as long as this notice is preserved.
 1156 
 1157 # AM_RUN_LOG(COMMAND)
 1158 # -------------------
 1159 # Run COMMAND, save the exit status in ac_status, and log it.
 1160 # (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
 1161 AC_DEFUN([AM_RUN_LOG],
 1162 [{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
 1163    ($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
 1164    ac_status=$?
 1165    echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
 1166    (exit $ac_status); }])
 1167 
 1168 # Check to make sure that the build environment is sane.    -*- Autoconf -*-
 1169 
 1170 # Copyright (C) 1996-2017 Free Software Foundation, Inc.
 1171 #
 1172 # This file is free software; the Free Software Foundation
 1173 # gives unlimited permission to copy and/or distribute it,
 1174 # with or without modifications, as long as this notice is preserved.
 1175 
 1176 # AM_SANITY_CHECK
 1177 # ---------------
 1178 AC_DEFUN([AM_SANITY_CHECK],
 1179 [AC_MSG_CHECKING([whether build environment is sane])
 1180 # Reject unsafe characters in $srcdir or the absolute working directory
 1181 # name.  Accept space and tab only in the latter.
 1182 am_lf='
 1183 '
 1184 case `pwd` in
 1185   *[[\\\"\#\$\&\'\`$am_lf]]*)
 1186     AC_MSG_ERROR([unsafe absolute working directory name]);;
 1187 esac
 1188 case $srcdir in
 1189   *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
 1190     AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
 1191 esac
 1192 
 1193 # Do 'set' in a subshell so we don't clobber the current shell's
 1194 # arguments.  Must try -L first in case configure is actually a
 1195 # symlink; some systems play weird games with the mod time of symlinks
 1196 # (eg FreeBSD returns the mod time of the symlink's containing
 1197 # directory).
 1198 if (
 1199    am_has_slept=no
 1200    for am_try in 1 2; do
 1201      echo "timestamp, slept: $am_has_slept" > conftest.file
 1202      set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
 1203      if test "$[*]" = "X"; then
 1204 	# -L didn't work.
 1205 	set X `ls -t "$srcdir/configure" conftest.file`
 1206      fi
 1207      if test "$[*]" != "X $srcdir/configure conftest.file" \
 1208 	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
 1209 
 1210 	# If neither matched, then we have a broken ls.  This can happen
 1211 	# if, for instance, CONFIG_SHELL is bash and it inherits a
 1212 	# broken ls alias from the environment.  This has actually
 1213 	# happened.  Such a system could not be considered "sane".
 1214 	AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
 1215   alias in your environment])
 1216      fi
 1217      if test "$[2]" = conftest.file || test $am_try -eq 2; then
 1218        break
 1219      fi
 1220      # Just in case.
 1221      sleep 1
 1222      am_has_slept=yes
 1223    done
 1224    test "$[2]" = conftest.file
 1225    )
 1226 then
 1227    # Ok.
 1228    :
 1229 else
 1230    AC_MSG_ERROR([newly created file is older than distributed files!
 1231 Check your system clock])
 1232 fi
 1233 AC_MSG_RESULT([yes])
 1234 # If we didn't sleep, we still need to ensure time stamps of config.status and
 1235 # generated files are strictly newer.
 1236 am_sleep_pid=
 1237 if grep 'slept: no' conftest.file >/dev/null 2>&1; then
 1238   ( sleep 1 ) &
 1239   am_sleep_pid=$!
 1240 fi
 1241 AC_CONFIG_COMMANDS_PRE(
 1242   [AC_MSG_CHECKING([that generated files are newer than configure])
 1243    if test -n "$am_sleep_pid"; then
 1244      # Hide warnings about reused PIDs.
 1245      wait $am_sleep_pid 2>/dev/null
 1246    fi
 1247    AC_MSG_RESULT([done])])
 1248 rm -f conftest.file
 1249 ])
 1250 
 1251 # Copyright (C) 2009-2017 Free Software Foundation, Inc.
 1252 #
 1253 # This file is free software; the Free Software Foundation
 1254 # gives unlimited permission to copy and/or distribute it,
 1255 # with or without modifications, as long as this notice is preserved.
 1256 
 1257 # AM_SILENT_RULES([DEFAULT])
 1258 # --------------------------
 1259 # Enable less verbose build rules; with the default set to DEFAULT
 1260 # ("yes" being less verbose, "no" or empty being verbose).
 1261 AC_DEFUN([AM_SILENT_RULES],
 1262 [AC_ARG_ENABLE([silent-rules], [dnl
 1263 AS_HELP_STRING(
 1264   [--enable-silent-rules],
 1265   [less verbose build output (undo: "make V=1")])
 1266 AS_HELP_STRING(
 1267   [--disable-silent-rules],
 1268   [verbose build output (undo: "make V=0")])dnl
 1269 ])
 1270 case $enable_silent_rules in @%:@ (((
 1271   yes) AM_DEFAULT_VERBOSITY=0;;
 1272    no) AM_DEFAULT_VERBOSITY=1;;
 1273     *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
 1274 esac
 1275 dnl
 1276 dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
 1277 dnl do not support nested variable expansions.
 1278 dnl See automake bug#9928 and bug#10237.
 1279 am_make=${MAKE-make}
 1280 AC_CACHE_CHECK([whether $am_make supports nested variables],
 1281    [am_cv_make_support_nested_variables],
 1282    [if AS_ECHO([['TRUE=$(BAR$(V))
 1283 BAR0=false
 1284 BAR1=true
 1285 V=1
 1286 am__doit:
 1287 	@$(TRUE)
 1288 .PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
 1289   am_cv_make_support_nested_variables=yes
 1290 else
 1291   am_cv_make_support_nested_variables=no
 1292 fi])
 1293 if test $am_cv_make_support_nested_variables = yes; then
 1294   dnl Using '$V' instead of '$(V)' breaks IRIX make.
 1295   AM_V='$(V)'
 1296   AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
 1297 else
 1298   AM_V=$AM_DEFAULT_VERBOSITY
 1299   AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
 1300 fi
 1301 AC_SUBST([AM_V])dnl
 1302 AM_SUBST_NOTMAKE([AM_V])dnl
 1303 AC_SUBST([AM_DEFAULT_V])dnl
 1304 AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
 1305 AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
 1306 AM_BACKSLASH='\'
 1307 AC_SUBST([AM_BACKSLASH])dnl
 1308 _AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
 1309 ])
 1310 
 1311 # Copyright (C) 2001-2017 Free Software Foundation, Inc.
 1312 #
 1313 # This file is free software; the Free Software Foundation
 1314 # gives unlimited permission to copy and/or distribute it,
 1315 # with or without modifications, as long as this notice is preserved.
 1316 
 1317 # AM_PROG_INSTALL_STRIP
 1318 # ---------------------
 1319 # One issue with vendor 'install' (even GNU) is that you can't
 1320 # specify the program used to strip binaries.  This is especially
 1321 # annoying in cross-compiling environments, where the build's strip
 1322 # is unlikely to handle the host's binaries.
 1323 # Fortunately install-sh will honor a STRIPPROG variable, so we
 1324 # always use install-sh in "make install-strip", and initialize
 1325 # STRIPPROG with the value of the STRIP variable (set by the user).
 1326 AC_DEFUN([AM_PROG_INSTALL_STRIP],
 1327 [AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
 1328 # Installed binaries are usually stripped using 'strip' when the user
 1329 # run "make install-strip".  However 'strip' might not be the right
 1330 # tool to use in cross-compilation environments, therefore Automake
 1331 # will honor the 'STRIP' environment variable to overrule this program.
 1332 dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
 1333 if test "$cross_compiling" != no; then
 1334   AC_CHECK_TOOL([STRIP], [strip], :)
 1335 fi
 1336 INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
 1337 AC_SUBST([INSTALL_STRIP_PROGRAM])])
 1338 
 1339 # Copyright (C) 2006-2017 Free Software Foundation, Inc.
 1340 #
 1341 # This file is free software; the Free Software Foundation
 1342 # gives unlimited permission to copy and/or distribute it,
 1343 # with or without modifications, as long as this notice is preserved.
 1344 
 1345 # _AM_SUBST_NOTMAKE(VARIABLE)
 1346 # ---------------------------
 1347 # Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
 1348 # This macro is traced by Automake.
 1349 AC_DEFUN([_AM_SUBST_NOTMAKE])
 1350 
 1351 # AM_SUBST_NOTMAKE(VARIABLE)
 1352 # --------------------------
 1353 # Public sister of _AM_SUBST_NOTMAKE.
 1354 AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
 1355 
 1356 # Check how to create a tarball.                            -*- Autoconf -*-
 1357 
 1358 # Copyright (C) 2004-2017 Free Software Foundation, Inc.
 1359 #
 1360 # This file is free software; the Free Software Foundation
 1361 # gives unlimited permission to copy and/or distribute it,
 1362 # with or without modifications, as long as this notice is preserved.
 1363 
 1364 # _AM_PROG_TAR(FORMAT)
 1365 # --------------------
 1366 # Check how to create a tarball in format FORMAT.
 1367 # FORMAT should be one of 'v7', 'ustar', or 'pax'.
 1368 #
 1369 # Substitute a variable $(am__tar) that is a command
 1370 # writing to stdout a FORMAT-tarball containing the directory
 1371 # $tardir.
 1372 #     tardir=directory && $(am__tar) > result.tar
 1373 #
 1374 # Substitute a variable $(am__untar) that extract such
 1375 # a tarball read from stdin.
 1376 #     $(am__untar) < result.tar
 1377 #
 1378 AC_DEFUN([_AM_PROG_TAR],
 1379 [# Always define AMTAR for backward compatibility.  Yes, it's still used
 1380 # in the wild :-(  We should find a proper way to deprecate it ...
 1381 AC_SUBST([AMTAR], ['$${TAR-tar}'])
 1382 
 1383 # We'll loop over all known methods to create a tar archive until one works.
 1384 _am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
 1385 
 1386 m4_if([$1], [v7],
 1387   [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
 1388 
 1389   [m4_case([$1],
 1390     [ustar],
 1391      [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
 1392       # There is notably a 21 bits limit for the UID and the GID.  In fact,
 1393       # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
 1394       # and bug#13588).
 1395       am_max_uid=2097151 # 2^21 - 1
 1396       am_max_gid=$am_max_uid
 1397       # The $UID and $GID variables are not portable, so we need to resort
 1398       # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
 1399       # below are definitely unexpected, so allow the users to see them
 1400       # (that is, avoid stderr redirection).
 1401       am_uid=`id -u || echo unknown`
 1402       am_gid=`id -g || echo unknown`
 1403       AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
 1404       if test $am_uid -le $am_max_uid; then
 1405          AC_MSG_RESULT([yes])
 1406       else
 1407          AC_MSG_RESULT([no])
 1408          _am_tools=none
 1409       fi
 1410       AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
 1411       if test $am_gid -le $am_max_gid; then
 1412          AC_MSG_RESULT([yes])
 1413       else
 1414         AC_MSG_RESULT([no])
 1415         _am_tools=none
 1416       fi],
 1417 
 1418   [pax],
 1419     [],
 1420 
 1421   [m4_fatal([Unknown tar format])])
 1422 
 1423   AC_MSG_CHECKING([how to create a $1 tar archive])
 1424 
 1425   # Go ahead even if we have the value already cached.  We do so because we
 1426   # need to set the values for the 'am__tar' and 'am__untar' variables.
 1427   _am_tools=${am_cv_prog_tar_$1-$_am_tools}
 1428 
 1429   for _am_tool in $_am_tools; do
 1430     case $_am_tool in
 1431     gnutar)
 1432       for _am_tar in tar gnutar gtar; do
 1433         AM_RUN_LOG([$_am_tar --version]) && break
 1434       done
 1435       am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
 1436       am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
 1437       am__untar="$_am_tar -xf -"
 1438       ;;
 1439     plaintar)
 1440       # Must skip GNU tar: if it does not support --format= it doesn't create
 1441       # ustar tarball either.
 1442       (tar --version) >/dev/null 2>&1 && continue
 1443       am__tar='tar chf - "$$tardir"'
 1444       am__tar_='tar chf - "$tardir"'
 1445       am__untar='tar xf -'
 1446       ;;
 1447     pax)
 1448       am__tar='pax -L -x $1 -w "$$tardir"'
 1449       am__tar_='pax -L -x $1 -w "$tardir"'
 1450       am__untar='pax -r'
 1451       ;;
 1452     cpio)
 1453       am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
 1454       am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
 1455       am__untar='cpio -i -H $1 -d'
 1456       ;;
 1457     none)
 1458       am__tar=false
 1459       am__tar_=false
 1460       am__untar=false
 1461       ;;
 1462     esac
 1463 
 1464     # If the value was cached, stop now.  We just wanted to have am__tar
 1465     # and am__untar set.
 1466     test -n "${am_cv_prog_tar_$1}" && break
 1467 
 1468     # tar/untar a dummy directory, and stop if the command works.
 1469     rm -rf conftest.dir
 1470     mkdir conftest.dir
 1471     echo GrepMe > conftest.dir/file
 1472     AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
 1473     rm -rf conftest.dir
 1474     if test -s conftest.tar; then
 1475       AM_RUN_LOG([$am__untar <conftest.tar])
 1476       AM_RUN_LOG([cat conftest.dir/file])
 1477       grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
 1478     fi
 1479   done
 1480   rm -rf conftest.dir
 1481 
 1482   AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
 1483   AC_MSG_RESULT([$am_cv_prog_tar_$1])])
 1484 
 1485 AC_SUBST([am__tar])
 1486 AC_SUBST([am__untar])
 1487 ]) # _AM_PROG_TAR
 1488 
 1489 m4_include([m4/ax_pthread.m4])
 1490 m4_include([m4/libtool.m4])
 1491 m4_include([m4/ltoptions.m4])
 1492 m4_include([m4/ltsugar.m4])
 1493 m4_include([m4/ltversion.m4])
 1494 m4_include([m4/lt~obsolete.m4])
 1495 m4_include([m4/pcre_visibility.m4])