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    1 # generated automatically by aclocal 1.16.1 -*- Autoconf -*-
    2 
    3 # Copyright (C) 1996-2018 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 # iconv.m4 serial 19 (gettext-0.18.2)
   24 dnl Copyright (C) 2000-2002, 2007-2014, 2016 Free Software Foundation, Inc.
   25 dnl This file is free software; the Free Software Foundation
   26 dnl gives unlimited permission to copy and/or distribute it,
   27 dnl with or without modifications, as long as this notice is preserved.
   28 
   29 dnl From Bruno Haible.
   30 
   31 AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
   32 [
   33   dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
   34   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
   35   AC_REQUIRE([AC_LIB_RPATH])
   36 
   37   dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
   38   dnl accordingly.
   39   AC_LIB_LINKFLAGS_BODY([iconv])
   40 ])
   41 
   42 AC_DEFUN([AM_ICONV_LINK],
   43 [
   44   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
   45   dnl those with the standalone portable GNU libiconv installed).
   46   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
   47 
   48   dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
   49   dnl accordingly.
   50   AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
   51 
   52   dnl Add $INCICONV to CPPFLAGS before performing the following checks,
   53   dnl because if the user has installed libiconv and not disabled its use
   54   dnl via --without-libiconv-prefix, he wants to use it. The first
   55   dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed.
   56   am_save_CPPFLAGS="$CPPFLAGS"
   57   AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
   58 
   59   AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [
   60     am_cv_func_iconv="no, consider installing GNU libiconv"
   61     am_cv_lib_iconv=no
   62     AC_LINK_IFELSE(
   63       [AC_LANG_PROGRAM(
   64          [[
   65 #include <stdlib.h>
   66 #include <iconv.h>
   67          ]],
   68          [[iconv_t cd = iconv_open("","");
   69            iconv(cd,NULL,NULL,NULL,NULL);
   70            iconv_close(cd);]])],
   71       [am_cv_func_iconv=yes])
   72     if test "$am_cv_func_iconv" != yes; then
   73       am_save_LIBS="$LIBS"
   74       LIBS="$LIBS $LIBICONV"
   75       AC_LINK_IFELSE(
   76         [AC_LANG_PROGRAM(
   77            [[
   78 #include <stdlib.h>
   79 #include <iconv.h>
   80            ]],
   81            [[iconv_t cd = iconv_open("","");
   82              iconv(cd,NULL,NULL,NULL,NULL);
   83              iconv_close(cd);]])],
   84         [am_cv_lib_iconv=yes]
   85         [am_cv_func_iconv=yes])
   86       LIBS="$am_save_LIBS"
   87     fi
   88   ])
   89   if test "$am_cv_func_iconv" = yes; then
   90     AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [
   91       dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11,
   92       dnl Solaris 10.
   93       am_save_LIBS="$LIBS"
   94       if test $am_cv_lib_iconv = yes; then
   95         LIBS="$LIBS $LIBICONV"
   96       fi
   97       am_cv_func_iconv_works=no
   98       for ac_iconv_const in '' 'const'; do
   99         AC_RUN_IFELSE(
  100           [AC_LANG_PROGRAM(
  101              [[
  102 #include <iconv.h>
  103 #include <string.h>
  104 
  105 #ifndef ICONV_CONST
  106 # define ICONV_CONST $ac_iconv_const
  107 #endif
  108              ]],
  109              [[int result = 0;
  110   /* Test against AIX 5.1 bug: Failures are not distinguishable from successful
  111      returns.  */
  112   {
  113     iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8");
  114     if (cd_utf8_to_88591 != (iconv_t)(-1))
  115       {
  116         static ICONV_CONST char input[] = "\342\202\254"; /* EURO SIGN */
  117         char buf[10];
  118         ICONV_CONST char *inptr = input;
  119         size_t inbytesleft = strlen (input);
  120         char *outptr = buf;
  121         size_t outbytesleft = sizeof (buf);
  122         size_t res = iconv (cd_utf8_to_88591,
  123                             &inptr, &inbytesleft,
  124                             &outptr, &outbytesleft);
  125         if (res == 0)
  126           result |= 1;
  127         iconv_close (cd_utf8_to_88591);
  128       }
  129   }
  130   /* Test against Solaris 10 bug: Failures are not distinguishable from
  131      successful returns.  */
  132   {
  133     iconv_t cd_ascii_to_88591 = iconv_open ("ISO8859-1", "646");
  134     if (cd_ascii_to_88591 != (iconv_t)(-1))
  135       {
  136         static ICONV_CONST char input[] = "\263";
  137         char buf[10];
  138         ICONV_CONST char *inptr = input;
  139         size_t inbytesleft = strlen (input);
  140         char *outptr = buf;
  141         size_t outbytesleft = sizeof (buf);
  142         size_t res = iconv (cd_ascii_to_88591,
  143                             &inptr, &inbytesleft,
  144                             &outptr, &outbytesleft);
  145         if (res == 0)
  146           result |= 2;
  147         iconv_close (cd_ascii_to_88591);
  148       }
  149   }
  150   /* Test against AIX 6.1..7.1 bug: Buffer overrun.  */
  151   {
  152     iconv_t cd_88591_to_utf8 = iconv_open ("UTF-8", "ISO-8859-1");
  153     if (cd_88591_to_utf8 != (iconv_t)(-1))
  154       {
  155         static ICONV_CONST char input[] = "\304";
  156         static char buf[2] = { (char)0xDE, (char)0xAD };
  157         ICONV_CONST char *inptr = input;
  158         size_t inbytesleft = 1;
  159         char *outptr = buf;
  160         size_t outbytesleft = 1;
  161         size_t res = iconv (cd_88591_to_utf8,
  162                             &inptr, &inbytesleft,
  163                             &outptr, &outbytesleft);
  164         if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
  165           result |= 4;
  166         iconv_close (cd_88591_to_utf8);
  167       }
  168   }
  169 #if 0 /* This bug could be worked around by the caller.  */
  170   /* Test against HP-UX 11.11 bug: Positive return value instead of 0.  */
  171   {
  172     iconv_t cd_88591_to_utf8 = iconv_open ("utf8", "iso88591");
  173     if (cd_88591_to_utf8 != (iconv_t)(-1))
  174       {
  175         static ICONV_CONST char input[] = "\304rger mit b\366sen B\374bchen ohne Augenma\337";
  176         char buf[50];
  177         ICONV_CONST char *inptr = input;
  178         size_t inbytesleft = strlen (input);
  179         char *outptr = buf;
  180         size_t outbytesleft = sizeof (buf);
  181         size_t res = iconv (cd_88591_to_utf8,
  182                             &inptr, &inbytesleft,
  183                             &outptr, &outbytesleft);
  184         if ((int)res > 0)
  185           result |= 8;
  186         iconv_close (cd_88591_to_utf8);
  187       }
  188   }
  189 #endif
  190   /* Test against HP-UX 11.11 bug: No converter from EUC-JP to UTF-8 is
  191      provided.  */
  192   if (/* Try standardized names.  */
  193       iconv_open ("UTF-8", "EUC-JP") == (iconv_t)(-1)
  194       /* Try IRIX, OSF/1 names.  */
  195       && iconv_open ("UTF-8", "eucJP") == (iconv_t)(-1)
  196       /* Try AIX names.  */
  197       && iconv_open ("UTF-8", "IBM-eucJP") == (iconv_t)(-1)
  198       /* Try HP-UX names.  */
  199       && iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
  200     result |= 16;
  201   return result;
  202 ]])],
  203           [am_cv_func_iconv_works=yes], ,
  204           [case "$host_os" in
  205              aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
  206              *)            am_cv_func_iconv_works="guessing yes" ;;
  207            esac])
  208         test "$am_cv_func_iconv_works" = no || break
  209       done
  210       LIBS="$am_save_LIBS"
  211     ])
  212     case "$am_cv_func_iconv_works" in
  213       *no) am_func_iconv=no am_cv_lib_iconv=no ;;
  214       *)   am_func_iconv=yes ;;
  215     esac
  216   else
  217     am_func_iconv=no am_cv_lib_iconv=no
  218   fi
  219   if test "$am_func_iconv" = yes; then
  220     AC_DEFINE([HAVE_ICONV], [1],
  221       [Define if you have the iconv() function and it works.])
  222   fi
  223   if test "$am_cv_lib_iconv" = yes; then
  224     AC_MSG_CHECKING([how to link with libiconv])
  225     AC_MSG_RESULT([$LIBICONV])
  226   else
  227     dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
  228     dnl either.
  229     CPPFLAGS="$am_save_CPPFLAGS"
  230     LIBICONV=
  231     LTLIBICONV=
  232   fi
  233   AC_SUBST([LIBICONV])
  234   AC_SUBST([LTLIBICONV])
  235 ])
  236 
  237 dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to
  238 dnl avoid warnings like
  239 dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required".
  240 dnl This is tricky because of the way 'aclocal' is implemented:
  241 dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN.
  242 dnl   Otherwise aclocal's initial scan pass would miss the macro definition.
  243 dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions.
  244 dnl   Otherwise aclocal would emit many "Use of uninitialized value $1"
  245 dnl   warnings.
  246 m4_define([gl_iconv_AC_DEFUN],
  247   m4_version_prereq([2.64],
  248     [[AC_DEFUN_ONCE(
  249         [$1], [$2])]],
  250     [m4_ifdef([gl_00GNULIB],
  251        [[AC_DEFUN_ONCE(
  252            [$1], [$2])]],
  253        [[AC_DEFUN(
  254            [$1], [$2])]])]))
  255 gl_iconv_AC_DEFUN([AM_ICONV],
  256 [
  257   AM_ICONV_LINK
  258   if test "$am_cv_func_iconv" = yes; then
  259     AC_MSG_CHECKING([for iconv declaration])
  260     AC_CACHE_VAL([am_cv_proto_iconv], [
  261       AC_COMPILE_IFELSE(
  262         [AC_LANG_PROGRAM(
  263            [[
  264 #include <stdlib.h>
  265 #include <iconv.h>
  266 extern
  267 #ifdef __cplusplus
  268 "C"
  269 #endif
  270 #if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus)
  271 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
  272 #else
  273 size_t iconv();
  274 #endif
  275            ]],
  276            [[]])],
  277         [am_cv_proto_iconv_arg1=""],
  278         [am_cv_proto_iconv_arg1="const"])
  279       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
  280     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
  281     AC_MSG_RESULT([
  282          $am_cv_proto_iconv])
  283     AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1],
  284       [Define as const if the declaration of iconv() needs const.])
  285     dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>.
  286     m4_ifdef([gl_ICONV_H_DEFAULTS],
  287       [AC_REQUIRE([gl_ICONV_H_DEFAULTS])
  288        if test -n "$am_cv_proto_iconv_arg1"; then
  289          ICONV_CONST="const"
  290        fi
  291       ])
  292   fi
  293 ])
  294 
  295 # lib-ld.m4 serial 6
  296 dnl Copyright (C) 1996-2003, 2009-2016 Free Software Foundation, Inc.
  297 dnl This file is free software; the Free Software Foundation
  298 dnl gives unlimited permission to copy and/or distribute it,
  299 dnl with or without modifications, as long as this notice is preserved.
  300 
  301 dnl Subroutines of libtool.m4,
  302 dnl with replacements s/_*LT_PATH/AC_LIB_PROG/ and s/lt_/acl_/ to avoid
  303 dnl collision with libtool.m4.
  304 
  305 dnl From libtool-2.4. Sets the variable with_gnu_ld to yes or no.
  306 AC_DEFUN([AC_LIB_PROG_LD_GNU],
  307 [AC_CACHE_CHECK([if the linker ($LD) is GNU ld], [acl_cv_prog_gnu_ld],
  308 [# I'd rather use --version here, but apparently some GNU lds only accept -v.
  309 case `$LD -v 2>&1 </dev/null` in
  310 *GNU* | *'with BFD'*)
  311   acl_cv_prog_gnu_ld=yes
  312   ;;
  313 *)
  314   acl_cv_prog_gnu_ld=no
  315   ;;
  316 esac])
  317 with_gnu_ld=$acl_cv_prog_gnu_ld
  318 ])
  319 
  320 dnl From libtool-2.4. Sets the variable LD.
  321 AC_DEFUN([AC_LIB_PROG_LD],
  322 [AC_REQUIRE([AC_PROG_CC])dnl
  323 AC_REQUIRE([AC_CANONICAL_HOST])dnl
  324 
  325 AC_ARG_WITH([gnu-ld],
  326     [AS_HELP_STRING([--with-gnu-ld],
  327         [assume the C compiler uses GNU ld [default=no]])],
  328     [test "$withval" = no || with_gnu_ld=yes],
  329     [with_gnu_ld=no])dnl
  330 
  331 # Prepare PATH_SEPARATOR.
  332 # The user is always right.
  333 if test "${PATH_SEPARATOR+set}" != set; then
  334   # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
  335   # contains only /bin. Note that ksh looks also at the FPATH variable,
  336   # so we have to set that as well for the test.
  337   PATH_SEPARATOR=:
  338   (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
  339     && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
  340            || PATH_SEPARATOR=';'
  341        }
  342 fi
  343 
  344 ac_prog=ld
  345 if test "$GCC" = yes; then
  346   # Check if gcc -print-prog-name=ld gives a path.
  347   AC_MSG_CHECKING([for ld used by $CC])
  348   case $host in
  349   *-*-mingw*)
  350     # gcc leaves a trailing carriage return which upsets mingw
  351     ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
  352   *)
  353     ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
  354   esac
  355   case $ac_prog in
  356     # Accept absolute paths.
  357     [[\\/]]* | ?:[[\\/]]*)
  358       re_direlt='/[[^/]][[^/]]*/\.\./'
  359       # Canonicalize the pathname of ld
  360       ac_prog=`echo "$ac_prog"| sed 's%\\\\%/%g'`
  361       while echo "$ac_prog" | grep "$re_direlt" > /dev/null 2>&1; do
  362         ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
  363       done
  364       test -z "$LD" && LD="$ac_prog"
  365       ;;
  366   "")
  367     # If it fails, then pretend we aren't using GCC.
  368     ac_prog=ld
  369     ;;
  370   *)
  371     # If it is relative, then search for the first ld in PATH.
  372     with_gnu_ld=unknown
  373     ;;
  374   esac
  375 elif test "$with_gnu_ld" = yes; then
  376   AC_MSG_CHECKING([for GNU ld])
  377 else
  378   AC_MSG_CHECKING([for non-GNU ld])
  379 fi
  380 AC_CACHE_VAL([acl_cv_path_LD],
  381 [if test -z "$LD"; then
  382   acl_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
  383   for ac_dir in $PATH; do
  384     IFS="$acl_save_ifs"
  385     test -z "$ac_dir" && ac_dir=.
  386     if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
  387       acl_cv_path_LD="$ac_dir/$ac_prog"
  388       # Check to see if the program is GNU ld.  I'd rather use --version,
  389       # but apparently some variants of GNU ld only accept -v.
  390       # Break only if it was the GNU/non-GNU ld that we prefer.
  391       case `"$acl_cv_path_LD" -v 2>&1 </dev/null` in
  392       *GNU* | *'with BFD'*)
  393         test "$with_gnu_ld" != no && break
  394         ;;
  395       *)
  396         test "$with_gnu_ld" != yes && break
  397         ;;
  398       esac
  399     fi
  400   done
  401   IFS="$acl_save_ifs"
  402 else
  403   acl_cv_path_LD="$LD" # Let the user override the test with a path.
  404 fi])
  405 LD="$acl_cv_path_LD"
  406 if test -n "$LD"; then
  407   AC_MSG_RESULT([$LD])
  408 else
  409   AC_MSG_RESULT([no])
  410 fi
  411 test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
  412 AC_LIB_PROG_LD_GNU
  413 ])
  414 
  415 # lib-link.m4 serial 26 (gettext-0.18.2)
  416 dnl Copyright (C) 2001-2016 Free Software Foundation, Inc.
  417 dnl This file is free software; the Free Software Foundation
  418 dnl gives unlimited permission to copy and/or distribute it,
  419 dnl with or without modifications, as long as this notice is preserved.
  420 
  421 dnl From Bruno Haible.
  422 
  423 AC_PREREQ([2.54])
  424 
  425 dnl AC_LIB_LINKFLAGS(name [, dependencies]) searches for libname and
  426 dnl the libraries corresponding to explicit and implicit dependencies.
  427 dnl Sets and AC_SUBSTs the LIB${NAME} and LTLIB${NAME} variables and
  428 dnl augments the CPPFLAGS variable.
  429 dnl Sets and AC_SUBSTs the LIB${NAME}_PREFIX variable to nonempty if libname
  430 dnl was found in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
  431 AC_DEFUN([AC_LIB_LINKFLAGS],
  432 [
  433   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
  434   AC_REQUIRE([AC_LIB_RPATH])
  435   pushdef([Name],[m4_translit([$1],[./+-], [____])])
  436   pushdef([NAME],[m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./+-],
  437                                    [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
  438   AC_CACHE_CHECK([how to link with lib[]$1], [ac_cv_lib[]Name[]_libs], [
  439     AC_LIB_LINKFLAGS_BODY([$1], [$2])
  440     ac_cv_lib[]Name[]_libs="$LIB[]NAME"
  441     ac_cv_lib[]Name[]_ltlibs="$LTLIB[]NAME"
  442     ac_cv_lib[]Name[]_cppflags="$INC[]NAME"
  443     ac_cv_lib[]Name[]_prefix="$LIB[]NAME[]_PREFIX"
  444   ])
  445   LIB[]NAME="$ac_cv_lib[]Name[]_libs"
  446   LTLIB[]NAME="$ac_cv_lib[]Name[]_ltlibs"
  447   INC[]NAME="$ac_cv_lib[]Name[]_cppflags"
  448   LIB[]NAME[]_PREFIX="$ac_cv_lib[]Name[]_prefix"
  449   AC_LIB_APPENDTOVAR([CPPFLAGS], [$INC]NAME)
  450   AC_SUBST([LIB]NAME)
  451   AC_SUBST([LTLIB]NAME)
  452   AC_SUBST([LIB]NAME[_PREFIX])
  453   dnl Also set HAVE_LIB[]NAME so that AC_LIB_HAVE_LINKFLAGS can reuse the
  454   dnl results of this search when this library appears as a dependency.
  455   HAVE_LIB[]NAME=yes
  456   popdef([NAME])
  457   popdef([Name])
  458 ])
  459 
  460 dnl AC_LIB_HAVE_LINKFLAGS(name, dependencies, includes, testcode, [missing-message])
  461 dnl searches for libname and the libraries corresponding to explicit and
  462 dnl implicit dependencies, together with the specified include files and
  463 dnl the ability to compile and link the specified testcode. The missing-message
  464 dnl defaults to 'no' and may contain additional hints for the user.
  465 dnl If found, it sets and AC_SUBSTs HAVE_LIB${NAME}=yes and the LIB${NAME}
  466 dnl and LTLIB${NAME} variables and augments the CPPFLAGS variable, and
  467 dnl #defines HAVE_LIB${NAME} to 1. Otherwise, it sets and AC_SUBSTs
  468 dnl HAVE_LIB${NAME}=no and LIB${NAME} and LTLIB${NAME} to empty.
  469 dnl Sets and AC_SUBSTs the LIB${NAME}_PREFIX variable to nonempty if libname
  470 dnl was found in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
  471 AC_DEFUN([AC_LIB_HAVE_LINKFLAGS],
  472 [
  473   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
  474   AC_REQUIRE([AC_LIB_RPATH])
  475   pushdef([Name],[m4_translit([$1],[./+-], [____])])
  476   pushdef([NAME],[m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./+-],
  477                                    [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
  478 
  479   dnl Search for lib[]Name and define LIB[]NAME, LTLIB[]NAME and INC[]NAME
  480   dnl accordingly.
  481   AC_LIB_LINKFLAGS_BODY([$1], [$2])
  482 
  483   dnl Add $INC[]NAME to CPPFLAGS before performing the following checks,
  484   dnl because if the user has installed lib[]Name and not disabled its use
  485   dnl via --without-lib[]Name-prefix, he wants to use it.
  486   ac_save_CPPFLAGS="$CPPFLAGS"
  487   AC_LIB_APPENDTOVAR([CPPFLAGS], [$INC]NAME)
  488 
  489   AC_CACHE_CHECK([for lib[]$1], [ac_cv_lib[]Name], [
  490     ac_save_LIBS="$LIBS"
  491     dnl If $LIB[]NAME contains some -l options, add it to the end of LIBS,
  492     dnl because these -l options might require -L options that are present in
  493     dnl LIBS. -l options benefit only from the -L options listed before it.
  494     dnl Otherwise, add it to the front of LIBS, because it may be a static
  495     dnl library that depends on another static library that is present in LIBS.
  496     dnl Static libraries benefit only from the static libraries listed after
  497     dnl it.
  498     case " $LIB[]NAME" in
  499       *" -l"*) LIBS="$LIBS $LIB[]NAME" ;;
  500       *)       LIBS="$LIB[]NAME $LIBS" ;;
  501     esac
  502     AC_LINK_IFELSE(
  503       [AC_LANG_PROGRAM([[$3]], [[$4]])],
  504       [ac_cv_lib[]Name=yes],
  505       [ac_cv_lib[]Name='m4_if([$5], [], [no], [[$5]])'])
  506     LIBS="$ac_save_LIBS"
  507   ])
  508   if test "$ac_cv_lib[]Name" = yes; then
  509     HAVE_LIB[]NAME=yes
  510     AC_DEFINE([HAVE_LIB]NAME, 1, [Define if you have the lib][$1 library.])
  511     AC_MSG_CHECKING([how to link with lib[]$1])
  512     AC_MSG_RESULT([$LIB[]NAME])
  513   else
  514     HAVE_LIB[]NAME=no
  515     dnl If $LIB[]NAME didn't lead to a usable library, we don't need
  516     dnl $INC[]NAME either.
  517     CPPFLAGS="$ac_save_CPPFLAGS"
  518     LIB[]NAME=
  519     LTLIB[]NAME=
  520     LIB[]NAME[]_PREFIX=
  521   fi
  522   AC_SUBST([HAVE_LIB]NAME)
  523   AC_SUBST([LIB]NAME)
  524   AC_SUBST([LTLIB]NAME)
  525   AC_SUBST([LIB]NAME[_PREFIX])
  526   popdef([NAME])
  527   popdef([Name])
  528 ])
  529 
  530 dnl Determine the platform dependent parameters needed to use rpath:
  531 dnl   acl_libext,
  532 dnl   acl_shlibext,
  533 dnl   acl_libname_spec,
  534 dnl   acl_library_names_spec,
  535 dnl   acl_hardcode_libdir_flag_spec,
  536 dnl   acl_hardcode_libdir_separator,
  537 dnl   acl_hardcode_direct,
  538 dnl   acl_hardcode_minus_L.
  539 AC_DEFUN([AC_LIB_RPATH],
  540 [
  541   dnl Tell automake >= 1.10 to complain if config.rpath is missing.
  542   m4_ifdef([AC_REQUIRE_AUX_FILE], [AC_REQUIRE_AUX_FILE([config.rpath])])
  543   AC_REQUIRE([AC_PROG_CC])                dnl we use $CC, $GCC, $LDFLAGS
  544   AC_REQUIRE([AC_LIB_PROG_LD])            dnl we use $LD, $with_gnu_ld
  545   AC_REQUIRE([AC_CANONICAL_HOST])         dnl we use $host
  546   AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
  547   AC_CACHE_CHECK([for shared library run path origin], [acl_cv_rpath], [
  548     CC="$CC" GCC="$GCC" LDFLAGS="$LDFLAGS" LD="$LD" with_gnu_ld="$with_gnu_ld" \
  549     ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.rpath" "$host" > conftest.sh
  550     . ./conftest.sh
  551     rm -f ./conftest.sh
  552     acl_cv_rpath=done
  553   ])
  554   wl="$acl_cv_wl"
  555   acl_libext="$acl_cv_libext"
  556   acl_shlibext="$acl_cv_shlibext"
  557   acl_libname_spec="$acl_cv_libname_spec"
  558   acl_library_names_spec="$acl_cv_library_names_spec"
  559   acl_hardcode_libdir_flag_spec="$acl_cv_hardcode_libdir_flag_spec"
  560   acl_hardcode_libdir_separator="$acl_cv_hardcode_libdir_separator"
  561   acl_hardcode_direct="$acl_cv_hardcode_direct"
  562   acl_hardcode_minus_L="$acl_cv_hardcode_minus_L"
  563   dnl Determine whether the user wants rpath handling at all.
  564   AC_ARG_ENABLE([rpath],
  565     [  --disable-rpath         do not hardcode runtime library paths],
  566     :, enable_rpath=yes)
  567 ])
  568 
  569 dnl AC_LIB_FROMPACKAGE(name, package)
  570 dnl declares that libname comes from the given package. The configure file
  571 dnl will then not have a --with-libname-prefix option but a
  572 dnl --with-package-prefix option. Several libraries can come from the same
  573 dnl package. This declaration must occur before an AC_LIB_LINKFLAGS or similar
  574 dnl macro call that searches for libname.
  575 AC_DEFUN([AC_LIB_FROMPACKAGE],
  576 [
  577   pushdef([NAME],[m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./+-],
  578                                    [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
  579   define([acl_frompackage_]NAME, [$2])
  580   popdef([NAME])
  581   pushdef([PACK],[$2])
  582   pushdef([PACKUP],[m4_translit(PACK,[abcdefghijklmnopqrstuvwxyz./+-],
  583                                      [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
  584   define([acl_libsinpackage_]PACKUP,
  585     m4_ifdef([acl_libsinpackage_]PACKUP, [m4_defn([acl_libsinpackage_]PACKUP)[, ]],)[lib$1])
  586   popdef([PACKUP])
  587   popdef([PACK])
  588 ])
  589 
  590 dnl AC_LIB_LINKFLAGS_BODY(name [, dependencies]) searches for libname and
  591 dnl the libraries corresponding to explicit and implicit dependencies.
  592 dnl Sets the LIB${NAME}, LTLIB${NAME} and INC${NAME} variables.
  593 dnl Also, sets the LIB${NAME}_PREFIX variable to nonempty if libname was found
  594 dnl in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
  595 AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
  596 [
  597   AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
  598   pushdef([NAME],[m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./+-],
  599                                    [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
  600   pushdef([PACK],[m4_ifdef([acl_frompackage_]NAME, [acl_frompackage_]NAME, lib[$1])])
  601   pushdef([PACKUP],[m4_translit(PACK,[abcdefghijklmnopqrstuvwxyz./+-],
  602                                      [ABCDEFGHIJKLMNOPQRSTUVWXYZ____])])
  603   pushdef([PACKLIBS],[m4_ifdef([acl_frompackage_]NAME, [acl_libsinpackage_]PACKUP, lib[$1])])
  604   dnl Autoconf >= 2.61 supports dots in --with options.
  605   pushdef([P_A_C_K],[m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.61]),[-1],[m4_translit(PACK,[.],[_])],PACK)])
  606   dnl By default, look in $includedir and $libdir.
  607   use_additional=yes
  608   AC_LIB_WITH_FINAL_PREFIX([
  609     eval additional_includedir=\"$includedir\"
  610     eval additional_libdir=\"$libdir\"
  611   ])
  612   AC_ARG_WITH(P_A_C_K[-prefix],
  613 [[  --with-]]P_A_C_K[[-prefix[=DIR]  search for ]PACKLIBS[ in DIR/include and DIR/lib
  614   --without-]]P_A_C_K[[-prefix     don't search for ]PACKLIBS[ in includedir and libdir]],
  615 [
  616     if test "X$withval" = "Xno"; then
  617       use_additional=no
  618     else
  619       if test "X$withval" = "X"; then
  620         AC_LIB_WITH_FINAL_PREFIX([
  621           eval additional_includedir=\"$includedir\"
  622           eval additional_libdir=\"$libdir\"
  623         ])
  624       else
  625         additional_includedir="$withval/include"
  626         additional_libdir="$withval/$acl_libdirstem"
  627         if test "$acl_libdirstem2" != "$acl_libdirstem" \
  628            && ! test -d "$withval/$acl_libdirstem"; then
  629           additional_libdir="$withval/$acl_libdirstem2"
  630         fi
  631       fi
  632     fi
  633 ])
  634   dnl Search the library and its dependencies in $additional_libdir and
  635   dnl $LDFLAGS. Using breadth-first-seach.
  636   LIB[]NAME=
  637   LTLIB[]NAME=
  638   INC[]NAME=
  639   LIB[]NAME[]_PREFIX=
  640   dnl HAVE_LIB${NAME} is an indicator that LIB${NAME}, LTLIB${NAME} have been
  641   dnl computed. So it has to be reset here.
  642   HAVE_LIB[]NAME=
  643   rpathdirs=
  644   ltrpathdirs=
  645   names_already_handled=
  646   names_next_round='$1 $2'
  647   while test -n "$names_next_round"; do
  648     names_this_round="$names_next_round"
  649     names_next_round=
  650     for name in $names_this_round; do
  651       already_handled=
  652       for n in $names_already_handled; do
  653         if test "$n" = "$name"; then
  654           already_handled=yes
  655           break
  656         fi
  657       done
  658       if test -z "$already_handled"; then
  659         names_already_handled="$names_already_handled $name"
  660         dnl See if it was already located by an earlier AC_LIB_LINKFLAGS
  661         dnl or AC_LIB_HAVE_LINKFLAGS call.
  662         uppername=`echo "$name" | sed -e 'y|abcdefghijklmnopqrstuvwxyz./+-|ABCDEFGHIJKLMNOPQRSTUVWXYZ____|'`
  663         eval value=\"\$HAVE_LIB$uppername\"
  664         if test -n "$value"; then
  665           if test "$value" = yes; then
  666             eval value=\"\$LIB$uppername\"
  667             test -z "$value" || LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$value"
  668             eval value=\"\$LTLIB$uppername\"
  669             test -z "$value" || LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }$value"
  670           else
  671             dnl An earlier call to AC_LIB_HAVE_LINKFLAGS has determined
  672             dnl that this library doesn't exist. So just drop it.
  673             :
  674           fi
  675         else
  676           dnl Search the library lib$name in $additional_libdir and $LDFLAGS
  677           dnl and the already constructed $LIBNAME/$LTLIBNAME.
  678           found_dir=
  679           found_la=
  680           found_so=
  681           found_a=
  682           eval libname=\"$acl_libname_spec\"    # typically: libname=lib$name
  683           if test -n "$acl_shlibext"; then
  684             shrext=".$acl_shlibext"             # typically: shrext=.so
  685           else
  686             shrext=
  687           fi
  688           if test $use_additional = yes; then
  689             dir="$additional_libdir"
  690             dnl The same code as in the loop below:
  691             dnl First look for a shared library.
  692             if test -n "$acl_shlibext"; then
  693               if test -f "$dir/$libname$shrext"; then
  694                 found_dir="$dir"
  695                 found_so="$dir/$libname$shrext"
  696               else
  697                 if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
  698                   ver=`(cd "$dir" && \
  699                         for f in "$libname$shrext".*; do echo "$f"; done \
  700                         | sed -e "s,^$libname$shrext\\\\.,," \
  701                         | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
  702                         | sed 1q ) 2>/dev/null`
  703                   if test -n "$ver" && test -f "$dir/$libname$shrext.$ver"; then
  704                     found_dir="$dir"
  705                     found_so="$dir/$libname$shrext.$ver"
  706                   fi
  707                 else
  708                   eval library_names=\"$acl_library_names_spec\"
  709                   for f in $library_names; do
  710                     if test -f "$dir/$f"; then
  711                       found_dir="$dir"
  712                       found_so="$dir/$f"
  713                       break
  714                     fi
  715                   done
  716                 fi
  717               fi
  718             fi
  719             dnl Then look for a static library.
  720             if test "X$found_dir" = "X"; then
  721               if test -f "$dir/$libname.$acl_libext"; then
  722                 found_dir="$dir"
  723                 found_a="$dir/$libname.$acl_libext"
  724               fi
  725             fi
  726             if test "X$found_dir" != "X"; then
  727               if test -f "$dir/$libname.la"; then
  728                 found_la="$dir/$libname.la"
  729               fi
  730             fi
  731           fi
  732           if test "X$found_dir" = "X"; then
  733             for x in $LDFLAGS $LTLIB[]NAME; do
  734               AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
  735               case "$x" in
  736                 -L*)
  737                   dir=`echo "X$x" | sed -e 's/^X-L//'`
  738                   dnl First look for a shared library.
  739                   if test -n "$acl_shlibext"; then
  740                     if test -f "$dir/$libname$shrext"; then
  741                       found_dir="$dir"
  742                       found_so="$dir/$libname$shrext"
  743                     else
  744                       if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
  745                         ver=`(cd "$dir" && \
  746                               for f in "$libname$shrext".*; do echo "$f"; done \
  747                               | sed -e "s,^$libname$shrext\\\\.,," \
  748                               | sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
  749                               | sed 1q ) 2>/dev/null`
  750                         if test -n "$ver" && test -f "$dir/$libname$shrext.$ver"; then
  751                           found_dir="$dir"
  752                           found_so="$dir/$libname$shrext.$ver"
  753                         fi
  754                       else
  755                         eval library_names=\"$acl_library_names_spec\"
  756                         for f in $library_names; do
  757                           if test -f "$dir/$f"; then
  758                             found_dir="$dir"
  759                             found_so="$dir/$f"
  760                             break
  761                           fi
  762                         done
  763                       fi
  764                     fi
  765                   fi
  766                   dnl Then look for a static library.
  767                   if test "X$found_dir" = "X"; then
  768                     if test -f "$dir/$libname.$acl_libext"; then
  769                       found_dir="$dir"
  770                       found_a="$dir/$libname.$acl_libext"
  771                     fi
  772                   fi
  773                   if test "X$found_dir" != "X"; then
  774                     if test -f "$dir/$libname.la"; then
  775                       found_la="$dir/$libname.la"
  776                     fi
  777                   fi
  778                   ;;
  779               esac
  780               if test "X$found_dir" != "X"; then
  781                 break
  782               fi
  783             done
  784           fi
  785           if test "X$found_dir" != "X"; then
  786             dnl Found the library.
  787             LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }-L$found_dir -l$name"
  788             if test "X$found_so" != "X"; then
  789               dnl Linking with a shared library. We attempt to hardcode its
  790               dnl directory into the executable's runpath, unless it's the
  791               dnl standard /usr/lib.
  792               if test "$enable_rpath" = no \
  793                  || test "X$found_dir" = "X/usr/$acl_libdirstem" \
  794                  || test "X$found_dir" = "X/usr/$acl_libdirstem2"; then
  795                 dnl No hardcoding is needed.
  796                 LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
  797               else
  798                 dnl Use an explicit option to hardcode DIR into the resulting
  799                 dnl binary.
  800                 dnl Potentially add DIR to ltrpathdirs.
  801                 dnl The ltrpathdirs will be appended to $LTLIBNAME at the end.
  802                 haveit=
  803                 for x in $ltrpathdirs; do
  804                   if test "X$x" = "X$found_dir"; then
  805                     haveit=yes
  806                     break
  807                   fi
  808                 done
  809                 if test -z "$haveit"; then
  810                   ltrpathdirs="$ltrpathdirs $found_dir"
  811                 fi
  812                 dnl The hardcoding into $LIBNAME is system dependent.
  813                 if test "$acl_hardcode_direct" = yes; then
  814                   dnl Using DIR/libNAME.so during linking hardcodes DIR into the
  815                   dnl resulting binary.
  816                   LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
  817                 else
  818                   if test -n "$acl_hardcode_libdir_flag_spec" && test "$acl_hardcode_minus_L" = no; then
  819                     dnl Use an explicit option to hardcode DIR into the resulting
  820                     dnl binary.
  821                     LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
  822                     dnl Potentially add DIR to rpathdirs.
  823                     dnl The rpathdirs will be appended to $LIBNAME at the end.
  824                     haveit=
  825                     for x in $rpathdirs; do
  826                       if test "X$x" = "X$found_dir"; then
  827                         haveit=yes
  828                         break
  829                       fi
  830                     done
  831                     if test -z "$haveit"; then
  832                       rpathdirs="$rpathdirs $found_dir"
  833                     fi
  834                   else
  835                     dnl Rely on "-L$found_dir".
  836                     dnl But don't add it if it's already contained in the LDFLAGS
  837                     dnl or the already constructed $LIBNAME
  838                     haveit=
  839                     for x in $LDFLAGS $LIB[]NAME; do
  840                       AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
  841                       if test "X$x" = "X-L$found_dir"; then
  842                         haveit=yes
  843                         break
  844                       fi
  845                     done
  846                     if test -z "$haveit"; then
  847                       LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-L$found_dir"
  848                     fi
  849                     if test "$acl_hardcode_minus_L" != no; then
  850                       dnl FIXME: Not sure whether we should use
  851                       dnl "-L$found_dir -l$name" or "-L$found_dir $found_so"
  852                       dnl here.
  853                       LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
  854                     else
  855                       dnl We cannot use $acl_hardcode_runpath_var and LD_RUN_PATH
  856                       dnl here, because this doesn't fit in flags passed to the
  857                       dnl compiler. So give up. No hardcoding. This affects only
  858                       dnl very old systems.
  859                       dnl FIXME: Not sure whether we should use
  860                       dnl "-L$found_dir -l$name" or "-L$found_dir $found_so"
  861                       dnl here.
  862                       LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-l$name"
  863                     fi
  864                   fi
  865                 fi
  866               fi
  867             else
  868               if test "X$found_a" != "X"; then
  869                 dnl Linking with a static library.
  870                 LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_a"
  871               else
  872                 dnl We shouldn't come here, but anyway it's good to have a
  873                 dnl fallback.
  874                 LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-L$found_dir -l$name"
  875               fi
  876             fi
  877             dnl Assume the include files are nearby.
  878             additional_includedir=
  879             case "$found_dir" in
  880               */$acl_libdirstem | */$acl_libdirstem/)
  881                 basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem/"'*$,,'`
  882                 if test "$name" = '$1'; then
  883                   LIB[]NAME[]_PREFIX="$basedir"
  884                 fi
  885                 additional_includedir="$basedir/include"
  886                 ;;
  887               */$acl_libdirstem2 | */$acl_libdirstem2/)
  888                 basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem2/"'*$,,'`
  889                 if test "$name" = '$1'; then
  890                   LIB[]NAME[]_PREFIX="$basedir"
  891                 fi
  892                 additional_includedir="$basedir/include"
  893                 ;;
  894             esac
  895             if test "X$additional_includedir" != "X"; then
  896               dnl Potentially add $additional_includedir to $INCNAME.
  897               dnl But don't add it
  898               dnl   1. if it's the standard /usr/include,
  899               dnl   2. if it's /usr/local/include and we are using GCC on Linux,
  900               dnl   3. if it's already present in $CPPFLAGS or the already
  901               dnl      constructed $INCNAME,
  902               dnl   4. if it doesn't exist as a directory.
  903               if test "X$additional_includedir" != "X/usr/include"; then
  904                 haveit=
  905                 if test "X$additional_includedir" = "X/usr/local/include"; then
  906                   if test -n "$GCC"; then
  907                     case $host_os in
  908                       linux* | gnu* | k*bsd*-gnu) haveit=yes;;
  909                     esac
  910                   fi
  911                 fi
  912                 if test -z "$haveit"; then
  913                   for x in $CPPFLAGS $INC[]NAME; do
  914                     AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
  915                     if test "X$x" = "X-I$additional_includedir"; then
  916                       haveit=yes
  917                       break
  918                     fi
  919                   done
  920                   if test -z "$haveit"; then
  921                     if test -d "$additional_includedir"; then
  922                       dnl Really add $additional_includedir to $INCNAME.
  923                       INC[]NAME="${INC[]NAME}${INC[]NAME:+ }-I$additional_includedir"
  924                     fi
  925                   fi
  926                 fi
  927               fi
  928             fi
  929             dnl Look for dependencies.
  930             if test -n "$found_la"; then
  931               dnl Read the .la file. It defines the variables
  932               dnl dlname, library_names, old_library, dependency_libs, current,
  933               dnl age, revision, installed, dlopen, dlpreopen, libdir.
  934               save_libdir="$libdir"
  935               case "$found_la" in
  936                 */* | *\\*) . "$found_la" ;;
  937                 *) . "./$found_la" ;;
  938               esac
  939               libdir="$save_libdir"
  940               dnl We use only dependency_libs.
  941               for dep in $dependency_libs; do
  942                 case "$dep" in
  943                   -L*)
  944                     additional_libdir=`echo "X$dep" | sed -e 's/^X-L//'`
  945                     dnl Potentially add $additional_libdir to $LIBNAME and $LTLIBNAME.
  946                     dnl But don't add it
  947                     dnl   1. if it's the standard /usr/lib,
  948                     dnl   2. if it's /usr/local/lib and we are using GCC on Linux,
  949                     dnl   3. if it's already present in $LDFLAGS or the already
  950                     dnl      constructed $LIBNAME,
  951                     dnl   4. if it doesn't exist as a directory.
  952                     if test "X$additional_libdir" != "X/usr/$acl_libdirstem" \
  953                        && test "X$additional_libdir" != "X/usr/$acl_libdirstem2"; then
  954                       haveit=
  955                       if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem" \
  956                          || test "X$additional_libdir" = "X/usr/local/$acl_libdirstem2"; then
  957                         if test -n "$GCC"; then
  958                           case $host_os in
  959                             linux* | gnu* | k*bsd*-gnu) haveit=yes;;
  960                           esac
  961                         fi
  962                       fi
  963                       if test -z "$haveit"; then
  964                         haveit=
  965                         for x in $LDFLAGS $LIB[]NAME; do
  966                           AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
  967                           if test "X$x" = "X-L$additional_libdir"; then
  968                             haveit=yes
  969                             break
  970                           fi
  971                         done
  972                         if test -z "$haveit"; then
  973                           if test -d "$additional_libdir"; then
  974                             dnl Really add $additional_libdir to $LIBNAME.
  975                             LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-L$additional_libdir"
  976                           fi
  977                         fi
  978                         haveit=
  979                         for x in $LDFLAGS $LTLIB[]NAME; do
  980                           AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
  981                           if test "X$x" = "X-L$additional_libdir"; then
  982                             haveit=yes
  983                             break
  984                           fi
  985                         done
  986                         if test -z "$haveit"; then
  987                           if test -d "$additional_libdir"; then
  988                             dnl Really add $additional_libdir to $LTLIBNAME.
  989                             LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }-L$additional_libdir"
  990                           fi
  991                         fi
  992                       fi
  993                     fi
  994                     ;;
  995                   -R*)
  996                     dir=`echo "X$dep" | sed -e 's/^X-R//'`
  997                     if test "$enable_rpath" != no; then
  998                       dnl Potentially add DIR to rpathdirs.
  999                       dnl The rpathdirs will be appended to $LIBNAME at the end.
 1000                       haveit=
 1001                       for x in $rpathdirs; do
 1002                         if test "X$x" = "X$dir"; then
 1003                           haveit=yes
 1004                           break
 1005                         fi
 1006                       done
 1007                       if test -z "$haveit"; then
 1008                         rpathdirs="$rpathdirs $dir"
 1009                       fi
 1010                       dnl Potentially add DIR to ltrpathdirs.
 1011                       dnl The ltrpathdirs will be appended to $LTLIBNAME at the end.
 1012                       haveit=
 1013                       for x in $ltrpathdirs; do
 1014                         if test "X$x" = "X$dir"; then
 1015                           haveit=yes
 1016                           break
 1017                         fi
 1018                       done
 1019                       if test -z "$haveit"; then
 1020                         ltrpathdirs="$ltrpathdirs $dir"
 1021                       fi
 1022                     fi
 1023                     ;;
 1024                   -l*)
 1025                     dnl Handle this in the next round.
 1026                     names_next_round="$names_next_round "`echo "X$dep" | sed -e 's/^X-l//'`
 1027                     ;;
 1028                   *.la)
 1029                     dnl Handle this in the next round. Throw away the .la's
 1030                     dnl directory; it is already contained in a preceding -L
 1031                     dnl option.
 1032                     names_next_round="$names_next_round "`echo "X$dep" | sed -e 's,^X.*/,,' -e 's,^lib,,' -e 's,\.la$,,'`
 1033                     ;;
 1034                   *)
 1035                     dnl Most likely an immediate library name.
 1036                     LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$dep"
 1037                     LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }$dep"
 1038                     ;;
 1039                 esac
 1040               done
 1041             fi
 1042           else
 1043             dnl Didn't find the library; assume it is in the system directories
 1044             dnl known to the linker and runtime loader. (All the system
 1045             dnl directories known to the linker should also be known to the
 1046             dnl runtime loader, otherwise the system is severely misconfigured.)
 1047             LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-l$name"
 1048             LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }-l$name"
 1049           fi
 1050         fi
 1051       fi
 1052     done
 1053   done
 1054   if test "X$rpathdirs" != "X"; then
 1055     if test -n "$acl_hardcode_libdir_separator"; then
 1056       dnl Weird platform: only the last -rpath option counts, the user must
 1057       dnl pass all path elements in one option. We can arrange that for a
 1058       dnl single library, but not when more than one $LIBNAMEs are used.
 1059       alldirs=
 1060       for found_dir in $rpathdirs; do
 1061         alldirs="${alldirs}${alldirs:+$acl_hardcode_libdir_separator}$found_dir"
 1062       done
 1063       dnl Note: acl_hardcode_libdir_flag_spec uses $libdir and $wl.
 1064       acl_save_libdir="$libdir"
 1065       libdir="$alldirs"
 1066       eval flag=\"$acl_hardcode_libdir_flag_spec\"
 1067       libdir="$acl_save_libdir"
 1068       LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$flag"
 1069     else
 1070       dnl The -rpath options are cumulative.
 1071       for found_dir in $rpathdirs; do
 1072         acl_save_libdir="$libdir"
 1073         libdir="$found_dir"
 1074         eval flag=\"$acl_hardcode_libdir_flag_spec\"
 1075         libdir="$acl_save_libdir"
 1076         LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$flag"
 1077       done
 1078     fi
 1079   fi
 1080   if test "X$ltrpathdirs" != "X"; then
 1081     dnl When using libtool, the option that works for both libraries and
 1082     dnl executables is -R. The -R options are cumulative.
 1083     for found_dir in $ltrpathdirs; do
 1084       LTLIB[]NAME="${LTLIB[]NAME}${LTLIB[]NAME:+ }-R$found_dir"
 1085     done
 1086   fi
 1087   popdef([P_A_C_K])
 1088   popdef([PACKLIBS])
 1089   popdef([PACKUP])
 1090   popdef([PACK])
 1091   popdef([NAME])
 1092 ])
 1093 
 1094 dnl AC_LIB_APPENDTOVAR(VAR, CONTENTS) appends the elements of CONTENTS to VAR,
 1095 dnl unless already present in VAR.
 1096 dnl Works only for CPPFLAGS, not for LIB* variables because that sometimes
 1097 dnl contains two or three consecutive elements that belong together.
 1098 AC_DEFUN([AC_LIB_APPENDTOVAR],
 1099 [
 1100   for element in [$2]; do
 1101     haveit=
 1102     for x in $[$1]; do
 1103       AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
 1104       if test "X$x" = "X$element"; then
 1105         haveit=yes
 1106         break
 1107       fi
 1108     done
 1109     if test -z "$haveit"; then
 1110       [$1]="${[$1]}${[$1]:+ }$element"
 1111     fi
 1112   done
 1113 ])
 1114 
 1115 dnl For those cases where a variable contains several -L and -l options
 1116 dnl referring to unknown libraries and directories, this macro determines the
 1117 dnl necessary additional linker options for the runtime path.
 1118 dnl AC_LIB_LINKFLAGS_FROM_LIBS([LDADDVAR], [LIBSVALUE], [USE-LIBTOOL])
 1119 dnl sets LDADDVAR to linker options needed together with LIBSVALUE.
 1120 dnl If USE-LIBTOOL evaluates to non-empty, linking with libtool is assumed,
 1121 dnl otherwise linking without libtool is assumed.
 1122 AC_DEFUN([AC_LIB_LINKFLAGS_FROM_LIBS],
 1123 [
 1124   AC_REQUIRE([AC_LIB_RPATH])
 1125   AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
 1126   $1=
 1127   if test "$enable_rpath" != no; then
 1128     if test -n "$acl_hardcode_libdir_flag_spec" && test "$acl_hardcode_minus_L" = no; then
 1129       dnl Use an explicit option to hardcode directories into the resulting
 1130       dnl binary.
 1131       rpathdirs=
 1132       next=
 1133       for opt in $2; do
 1134         if test -n "$next"; then
 1135           dir="$next"
 1136           dnl No need to hardcode the standard /usr/lib.
 1137           if test "X$dir" != "X/usr/$acl_libdirstem" \
 1138              && test "X$dir" != "X/usr/$acl_libdirstem2"; then
 1139             rpathdirs="$rpathdirs $dir"
 1140           fi
 1141           next=
 1142         else
 1143           case $opt in
 1144             -L) next=yes ;;
 1145             -L*) dir=`echo "X$opt" | sed -e 's,^X-L,,'`
 1146                  dnl No need to hardcode the standard /usr/lib.
 1147                  if test "X$dir" != "X/usr/$acl_libdirstem" \
 1148                     && test "X$dir" != "X/usr/$acl_libdirstem2"; then
 1149                    rpathdirs="$rpathdirs $dir"
 1150                  fi
 1151                  next= ;;
 1152             *) next= ;;
 1153           esac
 1154         fi
 1155       done
 1156       if test "X$rpathdirs" != "X"; then
 1157         if test -n ""$3""; then
 1158           dnl libtool is used for linking. Use -R options.
 1159           for dir in $rpathdirs; do
 1160             $1="${$1}${$1:+ }-R$dir"
 1161           done
 1162         else
 1163           dnl The linker is used for linking directly.
 1164           if test -n "$acl_hardcode_libdir_separator"; then
 1165             dnl Weird platform: only the last -rpath option counts, the user
 1166             dnl must pass all path elements in one option.
 1167             alldirs=
 1168             for dir in $rpathdirs; do
 1169               alldirs="${alldirs}${alldirs:+$acl_hardcode_libdir_separator}$dir"
 1170             done
 1171             acl_save_libdir="$libdir"
 1172             libdir="$alldirs"
 1173             eval flag=\"$acl_hardcode_libdir_flag_spec\"
 1174             libdir="$acl_save_libdir"
 1175             $1="$flag"
 1176           else
 1177             dnl The -rpath options are cumulative.
 1178             for dir in $rpathdirs; do
 1179               acl_save_libdir="$libdir"
 1180               libdir="$dir"
 1181               eval flag=\"$acl_hardcode_libdir_flag_spec\"
 1182               libdir="$acl_save_libdir"
 1183               $1="${$1}${$1:+ }$flag"
 1184             done
 1185           fi
 1186         fi
 1187       fi
 1188     fi
 1189   fi
 1190   AC_SUBST([$1])
 1191 ])
 1192 
 1193 # lib-prefix.m4 serial 7 (gettext-0.18)
 1194 dnl Copyright (C) 2001-2005, 2008-2016 Free Software Foundation, Inc.
 1195 dnl This file is free software; the Free Software Foundation
 1196 dnl gives unlimited permission to copy and/or distribute it,
 1197 dnl with or without modifications, as long as this notice is preserved.
 1198 
 1199 dnl From Bruno Haible.
 1200 
 1201 dnl AC_LIB_ARG_WITH is synonymous to AC_ARG_WITH in autoconf-2.13, and
 1202 dnl similar to AC_ARG_WITH in autoconf 2.52...2.57 except that is doesn't
 1203 dnl require excessive bracketing.
 1204 ifdef([AC_HELP_STRING],
 1205 [AC_DEFUN([AC_LIB_ARG_WITH], [AC_ARG_WITH([$1],[[$2]],[$3],[$4])])],
 1206 [AC_DEFUN([AC_][LIB_ARG_WITH], [AC_ARG_WITH([$1],[$2],[$3],[$4])])])
 1207 
 1208 dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed
 1209 dnl to access previously installed libraries. The basic assumption is that
 1210 dnl a user will want packages to use other packages he previously installed
 1211 dnl with the same --prefix option.
 1212 dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate
 1213 dnl libraries, but is otherwise very convenient.
 1214 AC_DEFUN([AC_LIB_PREFIX],
 1215 [
 1216   AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
 1217   AC_REQUIRE([AC_PROG_CC])
 1218   AC_REQUIRE([AC_CANONICAL_HOST])
 1219   AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
 1220   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
 1221   dnl By default, look in $includedir and $libdir.
 1222   use_additional=yes
 1223   AC_LIB_WITH_FINAL_PREFIX([
 1224     eval additional_includedir=\"$includedir\"
 1225     eval additional_libdir=\"$libdir\"
 1226   ])
 1227   AC_LIB_ARG_WITH([lib-prefix],
 1228 [  --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
 1229   --without-lib-prefix    don't search for libraries in includedir and libdir],
 1230 [
 1231     if test "X$withval" = "Xno"; then
 1232       use_additional=no
 1233     else
 1234       if test "X$withval" = "X"; then
 1235         AC_LIB_WITH_FINAL_PREFIX([
 1236           eval additional_includedir=\"$includedir\"
 1237           eval additional_libdir=\"$libdir\"
 1238         ])
 1239       else
 1240         additional_includedir="$withval/include"
 1241         additional_libdir="$withval/$acl_libdirstem"
 1242       fi
 1243     fi
 1244 ])
 1245   if test $use_additional = yes; then
 1246     dnl Potentially add $additional_includedir to $CPPFLAGS.
 1247     dnl But don't add it
 1248     dnl   1. if it's the standard /usr/include,
 1249     dnl   2. if it's already present in $CPPFLAGS,
 1250     dnl   3. if it's /usr/local/include and we are using GCC on Linux,
 1251     dnl   4. if it doesn't exist as a directory.
 1252     if test "X$additional_includedir" != "X/usr/include"; then
 1253       haveit=
 1254       for x in $CPPFLAGS; do
 1255         AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
 1256         if test "X$x" = "X-I$additional_includedir"; then
 1257           haveit=yes
 1258           break
 1259         fi
 1260       done
 1261       if test -z "$haveit"; then
 1262         if test "X$additional_includedir" = "X/usr/local/include"; then
 1263           if test -n "$GCC"; then
 1264             case $host_os in
 1265               linux* | gnu* | k*bsd*-gnu) haveit=yes;;
 1266             esac
 1267           fi
 1268         fi
 1269         if test -z "$haveit"; then
 1270           if test -d "$additional_includedir"; then
 1271             dnl Really add $additional_includedir to $CPPFLAGS.
 1272             CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
 1273           fi
 1274         fi
 1275       fi
 1276     fi
 1277     dnl Potentially add $additional_libdir to $LDFLAGS.
 1278     dnl But don't add it
 1279     dnl   1. if it's the standard /usr/lib,
 1280     dnl   2. if it's already present in $LDFLAGS,
 1281     dnl   3. if it's /usr/local/lib and we are using GCC on Linux,
 1282     dnl   4. if it doesn't exist as a directory.
 1283     if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
 1284       haveit=
 1285       for x in $LDFLAGS; do
 1286         AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
 1287         if test "X$x" = "X-L$additional_libdir"; then
 1288           haveit=yes
 1289           break
 1290         fi
 1291       done
 1292       if test -z "$haveit"; then
 1293         if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
 1294           if test -n "$GCC"; then
 1295             case $host_os in
 1296               linux*) haveit=yes;;
 1297             esac
 1298           fi
 1299         fi
 1300         if test -z "$haveit"; then
 1301           if test -d "$additional_libdir"; then
 1302             dnl Really add $additional_libdir to $LDFLAGS.
 1303             LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
 1304           fi
 1305         fi
 1306       fi
 1307     fi
 1308   fi
 1309 ])
 1310 
 1311 dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
 1312 dnl acl_final_exec_prefix, containing the values to which $prefix and
 1313 dnl $exec_prefix will expand at the end of the configure script.
 1314 AC_DEFUN([AC_LIB_PREPARE_PREFIX],
 1315 [
 1316   dnl Unfortunately, prefix and exec_prefix get only finally determined
 1317   dnl at the end of configure.
 1318   if test "X$prefix" = "XNONE"; then
 1319     acl_final_prefix="$ac_default_prefix"
 1320   else
 1321     acl_final_prefix="$prefix"
 1322   fi
 1323   if test "X$exec_prefix" = "XNONE"; then
 1324     acl_final_exec_prefix='${prefix}'
 1325   else
 1326     acl_final_exec_prefix="$exec_prefix"
 1327   fi
 1328   acl_save_prefix="$prefix"
 1329   prefix="$acl_final_prefix"
 1330   eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
 1331   prefix="$acl_save_prefix"
 1332 ])
 1333 
 1334 dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
 1335 dnl variables prefix and exec_prefix bound to the values they will have
 1336 dnl at the end of the configure script.
 1337 AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
 1338 [
 1339   acl_save_prefix="$prefix"
 1340   prefix="$acl_final_prefix"
 1341   acl_save_exec_prefix="$exec_prefix"
 1342   exec_prefix="$acl_final_exec_prefix"
 1343   $1
 1344   exec_prefix="$acl_save_exec_prefix"
 1345   prefix="$acl_save_prefix"
 1346 ])
 1347 
 1348 dnl AC_LIB_PREPARE_MULTILIB creates
 1349 dnl - a variable acl_libdirstem, containing the basename of the libdir, either
 1350 dnl   "lib" or "lib64" or "lib/64",
 1351 dnl - a variable acl_libdirstem2, as a secondary possible value for
 1352 dnl   acl_libdirstem, either the same as acl_libdirstem or "lib/sparcv9" or
 1353 dnl   "lib/amd64".
 1354 AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
 1355 [
 1356   dnl There is no formal standard regarding lib and lib64.
 1357   dnl On glibc systems, the current practice is that on a system supporting
 1358   dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
 1359   dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. We determine
 1360   dnl the compiler's default mode by looking at the compiler's library search
 1361   dnl path. If at least one of its elements ends in /lib64 or points to a
 1362   dnl directory whose absolute pathname ends in /lib64, we assume a 64-bit ABI.
 1363   dnl Otherwise we use the default, namely "lib".
 1364   dnl On Solaris systems, the current practice is that on a system supporting
 1365   dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
 1366   dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or
 1367   dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.
 1368   AC_REQUIRE([AC_CANONICAL_HOST])
 1369   acl_libdirstem=lib
 1370   acl_libdirstem2=
 1371   case "$host_os" in
 1372     solaris*)
 1373       dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment
 1374       dnl <http://docs.sun.com/app/docs/doc/816-5138/dev-env?l=en&a=view>.
 1375       dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."
 1376       dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the
 1377       dnl symlink is missing, so we set acl_libdirstem2 too.
 1378       AC_CACHE_CHECK([for 64-bit host], [gl_cv_solaris_64bit],
 1379         [AC_EGREP_CPP([sixtyfour bits], [
 1380 #ifdef _LP64
 1381 sixtyfour bits
 1382 #endif
 1383            ], [gl_cv_solaris_64bit=yes], [gl_cv_solaris_64bit=no])
 1384         ])
 1385       if test $gl_cv_solaris_64bit = yes; then
 1386         acl_libdirstem=lib/64
 1387         case "$host_cpu" in
 1388           sparc*)        acl_libdirstem2=lib/sparcv9 ;;
 1389           i*86 | x86_64) acl_libdirstem2=lib/amd64 ;;
 1390         esac
 1391       fi
 1392       ;;
 1393     *)
 1394       searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
 1395       if test -n "$searchpath"; then
 1396         acl_save_IFS="${IFS= 	}"; IFS=":"
 1397         for searchdir in $searchpath; do
 1398           if test -d "$searchdir"; then
 1399             case "$searchdir" in
 1400               */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
 1401               */../ | */.. )
 1402                 # Better ignore directories of this form. They are misleading.
 1403                 ;;
 1404               *) searchdir=`cd "$searchdir" && pwd`
 1405                  case "$searchdir" in
 1406                    */lib64 ) acl_libdirstem=lib64 ;;
 1407                  esac ;;
 1408             esac
 1409           fi
 1410         done
 1411         IFS="$acl_save_IFS"
 1412       fi
 1413       ;;
 1414   esac
 1415   test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
 1416 ])
 1417 
 1418 # Copyright (C) 2002-2018 Free Software Foundation, Inc.
 1419 #
 1420 # This file is free software; the Free Software Foundation
 1421 # gives unlimited permission to copy and/or distribute it,
 1422 # with or without modifications, as long as this notice is preserved.
 1423 
 1424 # AM_AUTOMAKE_VERSION(VERSION)
 1425 # ----------------------------
 1426 # Automake X.Y traces this macro to ensure aclocal.m4 has been
 1427 # generated from the m4 files accompanying Automake X.Y.
 1428 # (This private macro should not be called outside this file.)
 1429 AC_DEFUN([AM_AUTOMAKE_VERSION],
 1430 [am__api_version='1.16'
 1431 dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to
 1432 dnl require some minimum version.  Point them to the right macro.
 1433 m4_if([$1], [1.16.1], [],
 1434       [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl
 1435 ])
 1436 
 1437 # _AM_AUTOCONF_VERSION(VERSION)
 1438 # -----------------------------
 1439 # aclocal traces this macro to find the Autoconf version.
 1440 # This is a private macro too.  Using m4_define simplifies
 1441 # the logic in aclocal, which can simply ignore this definition.
 1442 m4_define([_AM_AUTOCONF_VERSION], [])
 1443 
 1444 # AM_SET_CURRENT_AUTOMAKE_VERSION
 1445 # -------------------------------
 1446 # Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced.
 1447 # This function is AC_REQUIREd by AM_INIT_AUTOMAKE.
 1448 AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION],
 1449 [AM_AUTOMAKE_VERSION([1.16.1])dnl
 1450 m4_ifndef([AC_AUTOCONF_VERSION],
 1451   [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
 1452 _AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))])
 1453 
 1454 # AM_AUX_DIR_EXPAND                                         -*- Autoconf -*-
 1455 
 1456 # Copyright (C) 2001-2018 Free Software Foundation, Inc.
 1457 #
 1458 # This file is free software; the Free Software Foundation
 1459 # gives unlimited permission to copy and/or distribute it,
 1460 # with or without modifications, as long as this notice is preserved.
 1461 
 1462 # For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets
 1463 # $ac_aux_dir to '$srcdir/foo'.  In other projects, it is set to
 1464 # '$srcdir', '$srcdir/..', or '$srcdir/../..'.
 1465 #
 1466 # Of course, Automake must honor this variable whenever it calls a
 1467 # tool from the auxiliary directory.  The problem is that $srcdir (and
 1468 # therefore $ac_aux_dir as well) can be either absolute or relative,
 1469 # depending on how configure is run.  This is pretty annoying, since
 1470 # it makes $ac_aux_dir quite unusable in subdirectories: in the top
 1471 # source directory, any form will work fine, but in subdirectories a
 1472 # relative path needs to be adjusted first.
 1473 #
 1474 # $ac_aux_dir/missing
 1475 #    fails when called from a subdirectory if $ac_aux_dir is relative
 1476 # $top_srcdir/$ac_aux_dir/missing
 1477 #    fails if $ac_aux_dir is absolute,
 1478 #    fails when called from a subdirectory in a VPATH build with
 1479 #          a relative $ac_aux_dir
 1480 #
 1481 # The reason of the latter failure is that $top_srcdir and $ac_aux_dir
 1482 # are both prefixed by $srcdir.  In an in-source build this is usually
 1483 # harmless because $srcdir is '.', but things will broke when you
 1484 # start a VPATH build or use an absolute $srcdir.
 1485 #
 1486 # So we could use something similar to $top_srcdir/$ac_aux_dir/missing,
 1487 # iff we strip the leading $srcdir from $ac_aux_dir.  That would be:
 1488 #   am_aux_dir='\$(top_srcdir)/'`expr "$ac_aux_dir" : "$srcdir//*\(.*\)"`
 1489 # and then we would define $MISSING as
 1490 #   MISSING="\${SHELL} $am_aux_dir/missing"
 1491 # This will work as long as MISSING is not called from configure, because
 1492 # unfortunately $(top_srcdir) has no meaning in configure.
 1493 # However there are other variables, like CC, which are often used in
 1494 # configure, and could therefore not use this "fixed" $ac_aux_dir.
 1495 #
 1496 # Another solution, used here, is to always expand $ac_aux_dir to an
 1497 # absolute PATH.  The drawback is that using absolute paths prevent a
 1498 # configured tree to be moved without reconfiguration.
 1499 
 1500 AC_DEFUN([AM_AUX_DIR_EXPAND],
 1501 [AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
 1502 # Expand $ac_aux_dir to an absolute path.
 1503 am_aux_dir=`cd "$ac_aux_dir" && pwd`
 1504 ])
 1505 
 1506 # AM_CONDITIONAL                                            -*- Autoconf -*-
 1507 
 1508 # Copyright (C) 1997-2018 Free Software Foundation, Inc.
 1509 #
 1510 # This file is free software; the Free Software Foundation
 1511 # gives unlimited permission to copy and/or distribute it,
 1512 # with or without modifications, as long as this notice is preserved.
 1513 
 1514 # AM_CONDITIONAL(NAME, SHELL-CONDITION)
 1515 # -------------------------------------
 1516 # Define a conditional.
 1517 AC_DEFUN([AM_CONDITIONAL],
 1518 [AC_PREREQ([2.52])dnl
 1519  m4_if([$1], [TRUE],  [AC_FATAL([$0: invalid condition: $1])],
 1520        [$1], [FALSE], [AC_FATAL([$0: invalid condition: $1])])dnl
 1521 AC_SUBST([$1_TRUE])dnl
 1522 AC_SUBST([$1_FALSE])dnl
 1523 _AM_SUBST_NOTMAKE([$1_TRUE])dnl
 1524 _AM_SUBST_NOTMAKE([$1_FALSE])dnl
 1525 m4_define([_AM_COND_VALUE_$1], [$2])dnl
 1526 if $2; then
 1527   $1_TRUE=
 1528   $1_FALSE='#'
 1529 else
 1530   $1_TRUE='#'
 1531   $1_FALSE=
 1532 fi
 1533 AC_CONFIG_COMMANDS_PRE(
 1534 [if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then
 1535   AC_MSG_ERROR([[conditional "$1" was never defined.
 1536 Usually this means the macro was only invoked conditionally.]])
 1537 fi])])
 1538 
 1539 # Copyright (C) 1999-2018 Free Software Foundation, Inc.
 1540 #
 1541 # This file is free software; the Free Software Foundation
 1542 # gives unlimited permission to copy and/or distribute it,
 1543 # with or without modifications, as long as this notice is preserved.
 1544 
 1545 
 1546 # There are a few dirty hacks below to avoid letting 'AC_PROG_CC' be
 1547 # written in clear, in which case automake, when reading aclocal.m4,
 1548 # will think it sees a *use*, and therefore will trigger all it's
 1549 # C support machinery.  Also note that it means that autoscan, seeing
 1550 # CC etc. in the Makefile, will ask for an AC_PROG_CC use...
 1551 
 1552 
 1553 # _AM_DEPENDENCIES(NAME)
 1554 # ----------------------
 1555 # See how the compiler implements dependency checking.
 1556 # NAME is "CC", "CXX", "OBJC", "OBJCXX", "UPC", or "GJC".
 1557 # We try a few techniques and use that to set a single cache variable.
 1558 #
 1559 # We don't AC_REQUIRE the corresponding AC_PROG_CC since the latter was
 1560 # modified to invoke _AM_DEPENDENCIES(CC); we would have a circular
 1561 # dependency, and given that the user is not expected to run this macro,
 1562 # just rely on AC_PROG_CC.
 1563 AC_DEFUN([_AM_DEPENDENCIES],
 1564 [AC_REQUIRE([AM_SET_DEPDIR])dnl
 1565 AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl
 1566 AC_REQUIRE([AM_MAKE_INCLUDE])dnl
 1567 AC_REQUIRE([AM_DEP_TRACK])dnl
 1568 
 1569 m4_if([$1], [CC],   [depcc="$CC"   am_compiler_list=],
 1570       [$1], [CXX],  [depcc="$CXX"  am_compiler_list=],
 1571       [$1], [OBJC], [depcc="$OBJC" am_compiler_list='gcc3 gcc'],
 1572       [$1], [OBJCXX], [depcc="$OBJCXX" am_compiler_list='gcc3 gcc'],
 1573       [$1], [UPC],  [depcc="$UPC"  am_compiler_list=],
 1574       [$1], [GCJ],  [depcc="$GCJ"  am_compiler_list='gcc3 gcc'],
 1575                     [depcc="$$1"   am_compiler_list=])
 1576 
 1577 AC_CACHE_CHECK([dependency style of $depcc],
 1578                [am_cv_$1_dependencies_compiler_type],
 1579 [if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
 1580   # We make a subdir and do the tests there.  Otherwise we can end up
 1581   # making bogus files that we don't know about and never remove.  For
 1582   # instance it was reported that on HP-UX the gcc test will end up
 1583   # making a dummy file named 'D' -- because '-MD' means "put the output
 1584   # in D".
 1585   rm -rf conftest.dir
 1586   mkdir conftest.dir
 1587   # Copy depcomp to subdir because otherwise we won't find it if we're
 1588   # using a relative directory.
 1589   cp "$am_depcomp" conftest.dir
 1590   cd conftest.dir
 1591   # We will build objects and dependencies in a subdirectory because
 1592   # it helps to detect inapplicable dependency modes.  For instance
 1593   # both Tru64's cc and ICC support -MD to output dependencies as a
 1594   # side effect of compilation, but ICC will put the dependencies in
 1595   # the current directory while Tru64 will put them in the object
 1596   # directory.
 1597   mkdir sub
 1598 
 1599   am_cv_$1_dependencies_compiler_type=none
 1600   if test "$am_compiler_list" = ""; then
 1601      am_compiler_list=`sed -n ['s/^#*\([a-zA-Z0-9]*\))$/\1/p'] < ./depcomp`
 1602   fi
 1603   am__universal=false
 1604   m4_case([$1], [CC],
 1605     [case " $depcc " in #(
 1606      *\ -arch\ *\ -arch\ *) am__universal=true ;;
 1607      esac],
 1608     [CXX],
 1609     [case " $depcc " in #(
 1610      *\ -arch\ *\ -arch\ *) am__universal=true ;;
 1611      esac])
 1612 
 1613   for depmode in $am_compiler_list; do
 1614     # Setup a source with many dependencies, because some compilers
 1615     # like to wrap large dependency lists on column 80 (with \), and
 1616     # we should not choose a depcomp mode which is confused by this.
 1617     #
 1618     # We need to recreate these files for each test, as the compiler may
 1619     # overwrite some of them when testing with obscure command lines.
 1620     # This happens at least with the AIX C compiler.
 1621     : > sub/conftest.c
 1622     for i in 1 2 3 4 5 6; do
 1623       echo '#include "conftst'$i'.h"' >> sub/conftest.c
 1624       # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
 1625       # Solaris 10 /bin/sh.
 1626       echo '/* dummy */' > sub/conftst$i.h
 1627     done
 1628     echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
 1629 
 1630     # We check with '-c' and '-o' for the sake of the "dashmstdout"
 1631     # mode.  It turns out that the SunPro C++ compiler does not properly
 1632     # handle '-M -o', and we need to detect this.  Also, some Intel
 1633     # versions had trouble with output in subdirs.
 1634     am__obj=sub/conftest.${OBJEXT-o}
 1635     am__minus_obj="-o $am__obj"
 1636     case $depmode in
 1637     gcc)
 1638       # This depmode causes a compiler race in universal mode.
 1639       test "$am__universal" = false || continue
 1640       ;;
 1641     nosideeffect)
 1642       # After this tag, mechanisms are not by side-effect, so they'll
 1643       # only be used when explicitly requested.
 1644       if test "x$enable_dependency_tracking" = xyes; then
 1645 	continue
 1646       else
 1647 	break
 1648       fi
 1649       ;;
 1650     msvc7 | msvc7msys | msvisualcpp | msvcmsys)
 1651       # This compiler won't grok '-c -o', but also, the minuso test has
 1652       # not run yet.  These depmodes are late enough in the game, and
 1653       # so weak that their functioning should not be impacted.
 1654       am__obj=conftest.${OBJEXT-o}
 1655       am__minus_obj=
 1656       ;;
 1657     none) break ;;
 1658     esac
 1659     if depmode=$depmode \
 1660        source=sub/conftest.c object=$am__obj \
 1661        depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
 1662        $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
 1663          >/dev/null 2>conftest.err &&
 1664        grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
 1665        grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
 1666        grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
 1667        ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
 1668       # icc doesn't choke on unknown options, it will just issue warnings
 1669       # or remarks (even with -Werror).  So we grep stderr for any message
 1670       # that says an option was ignored or not supported.
 1671       # When given -MP, icc 7.0 and 7.1 complain thusly:
 1672       #   icc: Command line warning: ignoring option '-M'; no argument required
 1673       # The diagnosis changed in icc 8.0:
 1674       #   icc: Command line remark: option '-MP' not supported
 1675       if (grep 'ignoring option' conftest.err ||
 1676           grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
 1677         am_cv_$1_dependencies_compiler_type=$depmode
 1678         break
 1679       fi
 1680     fi
 1681   done
 1682 
 1683   cd ..
 1684   rm -rf conftest.dir
 1685 else
 1686   am_cv_$1_dependencies_compiler_type=none
 1687 fi
 1688 ])
 1689 AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
 1690 AM_CONDITIONAL([am__fastdep$1], [
 1691   test "x$enable_dependency_tracking" != xno \
 1692   && test "$am_cv_$1_dependencies_compiler_type" = gcc3])
 1693 ])
 1694 
 1695 
 1696 # AM_SET_DEPDIR
 1697 # -------------
 1698 # Choose a directory name for dependency files.
 1699 # This macro is AC_REQUIREd in _AM_DEPENDENCIES.
 1700 AC_DEFUN([AM_SET_DEPDIR],
 1701 [AC_REQUIRE([AM_SET_LEADING_DOT])dnl
 1702 AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
 1703 ])
 1704 
 1705 
 1706 # AM_DEP_TRACK
 1707 # ------------
 1708 AC_DEFUN([AM_DEP_TRACK],
 1709 [AC_ARG_ENABLE([dependency-tracking], [dnl
 1710 AS_HELP_STRING(
 1711   [--enable-dependency-tracking],
 1712   [do not reject slow dependency extractors])
 1713 AS_HELP_STRING(
 1714   [--disable-dependency-tracking],
 1715   [speeds up one-time build])])
 1716 if test "x$enable_dependency_tracking" != xno; then
 1717   am_depcomp="$ac_aux_dir/depcomp"
 1718   AMDEPBACKSLASH='\'
 1719   am__nodep='_no'
 1720 fi
 1721 AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno])
 1722 AC_SUBST([AMDEPBACKSLASH])dnl
 1723 _AM_SUBST_NOTMAKE([AMDEPBACKSLASH])dnl
 1724 AC_SUBST([am__nodep])dnl
 1725 _AM_SUBST_NOTMAKE([am__nodep])dnl
 1726 ])
 1727 
 1728 # Generate code to set up dependency tracking.              -*- Autoconf -*-
 1729 
 1730 # Copyright (C) 1999-2018 Free Software Foundation, Inc.
 1731 #
 1732 # This file is free software; the Free Software Foundation
 1733 # gives unlimited permission to copy and/or distribute it,
 1734 # with or without modifications, as long as this notice is preserved.
 1735 
 1736 # _AM_OUTPUT_DEPENDENCY_COMMANDS
 1737 # ------------------------------
 1738 AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS],
 1739 [{
 1740   # Older Autoconf quotes --file arguments for eval, but not when files
 1741   # are listed without --file.  Let's play safe and only enable the eval
 1742   # if we detect the quoting.
 1743   # TODO: see whether this extra hack can be removed once we start
 1744   # requiring Autoconf 2.70 or later.
 1745   AS_CASE([$CONFIG_FILES],
 1746           [*\'*], [eval set x "$CONFIG_FILES"],
 1747           [*], [set x $CONFIG_FILES])
 1748   shift
 1749   # Used to flag and report bootstrapping failures.
 1750   am_rc=0
 1751   for am_mf
 1752   do
 1753     # Strip MF so we end up with the name of the file.
 1754     am_mf=`AS_ECHO(["$am_mf"]) | sed -e 's/:.*$//'`
 1755     # Check whether this is an Automake generated Makefile which includes
 1756     # dependency-tracking related rules and includes.
 1757     # Grep'ing the whole file directly is not great: AIX grep has a line
 1758     # limit of 2048, but all sed's we know have understand at least 4000.
 1759     sed -n 's,^am--depfiles:.*,X,p' "$am_mf" | grep X >/dev/null 2>&1 \
 1760       || continue
 1761     am_dirpart=`AS_DIRNAME(["$am_mf"])`
 1762     am_filepart=`AS_BASENAME(["$am_mf"])`
 1763     AM_RUN_LOG([cd "$am_dirpart" \
 1764       && sed -e '/# am--include-marker/d' "$am_filepart" \
 1765         | $MAKE -f - am--depfiles]) || am_rc=$?
 1766   done
 1767   if test $am_rc -ne 0; then
 1768     AC_MSG_FAILURE([Something went wrong bootstrapping makefile fragments
 1769     for automatic dependency tracking.  Try re-running configure with the
 1770     '--disable-dependency-tracking' option to at least be able to build
 1771     the package (albeit without support for automatic dependency tracking).])
 1772   fi
 1773   AS_UNSET([am_dirpart])
 1774   AS_UNSET([am_filepart])
 1775   AS_UNSET([am_mf])
 1776   AS_UNSET([am_rc])
 1777   rm -f conftest-deps.mk
 1778 }
 1779 ])# _AM_OUTPUT_DEPENDENCY_COMMANDS
 1780 
 1781 
 1782 # AM_OUTPUT_DEPENDENCY_COMMANDS
 1783 # -----------------------------
 1784 # This macro should only be invoked once -- use via AC_REQUIRE.
 1785 #
 1786 # This code is only required when automatic dependency tracking is enabled.
 1787 # This creates each '.Po' and '.Plo' makefile fragment that we'll need in
 1788 # order to bootstrap the dependency handling code.
 1789 AC_DEFUN([AM_OUTPUT_DEPENDENCY_COMMANDS],
 1790 [AC_CONFIG_COMMANDS([depfiles],
 1791      [test x"$AMDEP_TRUE" != x"" || _AM_OUTPUT_DEPENDENCY_COMMANDS],
 1792      [AMDEP_TRUE="$AMDEP_TRUE" MAKE="${MAKE-make}"])])
 1793 
 1794 # Do all the work for Automake.                             -*- Autoconf -*-
 1795 
 1796 # Copyright (C) 1996-2018 Free Software Foundation, Inc.
 1797 #
 1798 # This file is free software; the Free Software Foundation
 1799 # gives unlimited permission to copy and/or distribute it,
 1800 # with or without modifications, as long as this notice is preserved.
 1801 
 1802 # This macro actually does too much.  Some checks are only needed if
 1803 # your package does certain things.  But this isn't really a big deal.
 1804 
 1805 dnl Redefine AC_PROG_CC to automatically invoke _AM_PROG_CC_C_O.
 1806 m4_define([AC_PROG_CC],
 1807 m4_defn([AC_PROG_CC])
 1808 [_AM_PROG_CC_C_O
 1809 ])
 1810 
 1811 # AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE])
 1812 # AM_INIT_AUTOMAKE([OPTIONS])
 1813 # -----------------------------------------------
 1814 # The call with PACKAGE and VERSION arguments is the old style
 1815 # call (pre autoconf-2.50), which is being phased out.  PACKAGE
 1816 # and VERSION should now be passed to AC_INIT and removed from
 1817 # the call to AM_INIT_AUTOMAKE.
 1818 # We support both call styles for the transition.  After
 1819 # the next Automake release, Autoconf can make the AC_INIT
 1820 # arguments mandatory, and then we can depend on a new Autoconf
 1821 # release and drop the old call support.
 1822 AC_DEFUN([AM_INIT_AUTOMAKE],
 1823 [AC_PREREQ([2.65])dnl
 1824 dnl Autoconf wants to disallow AM_ names.  We explicitly allow
 1825 dnl the ones we care about.
 1826 m4_pattern_allow([^AM_[A-Z]+FLAGS$])dnl
 1827 AC_REQUIRE([AM_SET_CURRENT_AUTOMAKE_VERSION])dnl
 1828 AC_REQUIRE([AC_PROG_INSTALL])dnl
 1829 if test "`cd $srcdir && pwd`" != "`pwd`"; then
 1830   # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
 1831   # is not polluted with repeated "-I."
 1832   AC_SUBST([am__isrc], [' -I$(srcdir)'])_AM_SUBST_NOTMAKE([am__isrc])dnl
 1833   # test to see if srcdir already configured
 1834   if test -f $srcdir/config.status; then
 1835     AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
 1836   fi
 1837 fi
 1838 
 1839 # test whether we have cygpath
 1840 if test -z "$CYGPATH_W"; then
 1841   if (cygpath --version) >/dev/null 2>/dev/null; then
 1842     CYGPATH_W='cygpath -w'
 1843   else
 1844     CYGPATH_W=echo
 1845   fi
 1846 fi
 1847 AC_SUBST([CYGPATH_W])
 1848 
 1849 # Define the identity of the package.
 1850 dnl Distinguish between old-style and new-style calls.
 1851 m4_ifval([$2],
 1852 [AC_DIAGNOSE([obsolete],
 1853              [$0: two- and three-arguments forms are deprecated.])
 1854 m4_ifval([$3], [_AM_SET_OPTION([no-define])])dnl
 1855  AC_SUBST([PACKAGE], [$1])dnl
 1856  AC_SUBST([VERSION], [$2])],
 1857 [_AM_SET_OPTIONS([$1])dnl
 1858 dnl Diagnose old-style AC_INIT with new-style AM_AUTOMAKE_INIT.
 1859 m4_if(
 1860   m4_ifdef([AC_PACKAGE_NAME], [ok]):m4_ifdef([AC_PACKAGE_VERSION], [ok]),
 1861   [ok:ok],,
 1862   [m4_fatal([AC_INIT should be called with package and version arguments])])dnl
 1863  AC_SUBST([PACKAGE], ['AC_PACKAGE_TARNAME'])dnl
 1864  AC_SUBST([VERSION], ['AC_PACKAGE_VERSION'])])dnl
 1865 
 1866 _AM_IF_OPTION([no-define],,
 1867 [AC_DEFINE_UNQUOTED([PACKAGE], ["$PACKAGE"], [Name of package])
 1868  AC_DEFINE_UNQUOTED([VERSION], ["$VERSION"], [Version number of package])])dnl
 1869 
 1870 # Some tools Automake needs.
 1871 AC_REQUIRE([AM_SANITY_CHECK])dnl
 1872 AC_REQUIRE([AC_ARG_PROGRAM])dnl
 1873 AM_MISSING_PROG([ACLOCAL], [aclocal-${am__api_version}])
 1874 AM_MISSING_PROG([AUTOCONF], [autoconf])
 1875 AM_MISSING_PROG([AUTOMAKE], [automake-${am__api_version}])
 1876 AM_MISSING_PROG([AUTOHEADER], [autoheader])
 1877 AM_MISSING_PROG([MAKEINFO], [makeinfo])
 1878 AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
 1879 AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl
 1880 AC_REQUIRE([AC_PROG_MKDIR_P])dnl
 1881 # For better backward compatibility.  To be removed once Automake 1.9.x
 1882 # dies out for good.  For more background, see:
 1883 # <https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
 1884 # <https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
 1885 AC_SUBST([mkdir_p], ['$(MKDIR_P)'])
 1886 # We need awk for the "check" target (and possibly the TAP driver).  The
 1887 # system "awk" is bad on some platforms.
 1888 AC_REQUIRE([AC_PROG_AWK])dnl
 1889 AC_REQUIRE([AC_PROG_MAKE_SET])dnl
 1890 AC_REQUIRE([AM_SET_LEADING_DOT])dnl
 1891 _AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])],
 1892 	      [_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])],
 1893 			     [_AM_PROG_TAR([v7])])])
 1894 _AM_IF_OPTION([no-dependencies],,
 1895 [AC_PROVIDE_IFELSE([AC_PROG_CC],
 1896 		  [_AM_DEPENDENCIES([CC])],
 1897 		  [m4_define([AC_PROG_CC],
 1898 			     m4_defn([AC_PROG_CC])[_AM_DEPENDENCIES([CC])])])dnl
 1899 AC_PROVIDE_IFELSE([AC_PROG_CXX],
 1900 		  [_AM_DEPENDENCIES([CXX])],
 1901 		  [m4_define([AC_PROG_CXX],
 1902 			     m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl
 1903 AC_PROVIDE_IFELSE([AC_PROG_OBJC],
 1904 		  [_AM_DEPENDENCIES([OBJC])],
 1905 		  [m4_define([AC_PROG_OBJC],
 1906 			     m4_defn([AC_PROG_OBJC])[_AM_DEPENDENCIES([OBJC])])])dnl
 1907 AC_PROVIDE_IFELSE([AC_PROG_OBJCXX],
 1908 		  [_AM_DEPENDENCIES([OBJCXX])],
 1909 		  [m4_define([AC_PROG_OBJCXX],
 1910 			     m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl
 1911 ])
 1912 AC_REQUIRE([AM_SILENT_RULES])dnl
 1913 dnl The testsuite driver may need to know about EXEEXT, so add the
 1914 dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen.  This
 1915 dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below.
 1916 AC_CONFIG_COMMANDS_PRE(dnl
 1917 [m4_provide_if([_AM_COMPILER_EXEEXT],
 1918   [AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl
 1919 
 1920 # POSIX will say in a future version that running "rm -f" with no argument
 1921 # is OK; and we want to be able to make that assumption in our Makefile
 1922 # recipes.  So use an aggressive probe to check that the usage we want is
 1923 # actually supported "in the wild" to an acceptable degree.
 1924 # See automake bug#10828.
 1925 # To make any issue more visible, cause the running configure to be aborted
 1926 # by default if the 'rm' program in use doesn't match our expectations; the
 1927 # user can still override this though.
 1928 if rm -f && rm -fr && rm -rf; then : OK; else
 1929   cat >&2 <<'END'
 1930 Oops!
 1931 
 1932 Your 'rm' program seems unable to run without file operands specified
 1933 on the command line, even when the '-f' option is present.  This is contrary
 1934 to the behaviour of most rm programs out there, and not conforming with
 1935 the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>
 1936 
 1937 Please tell bug-automake@gnu.org about your system, including the value
 1938 of your $PATH and any error possibly output before this message.  This
 1939 can help us improve future automake versions.
 1940 
 1941 END
 1942   if test x"$ACCEPT_INFERIOR_RM_PROGRAM" = x"yes"; then
 1943     echo 'Configuration will proceed anyway, since you have set the' >&2
 1944     echo 'ACCEPT_INFERIOR_RM_PROGRAM variable to "yes"' >&2
 1945     echo >&2
 1946   else
 1947     cat >&2 <<'END'
 1948 Aborting the configuration process, to ensure you take notice of the issue.
 1949 
 1950 You can download and install GNU coreutils to get an 'rm' implementation
 1951 that behaves properly: <https://www.gnu.org/software/coreutils/>.
 1952 
 1953 If you want to complete the configuration process using your problematic
 1954 'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
 1955 to "yes", and re-run configure.
 1956 
 1957 END
 1958     AC_MSG_ERROR([Your 'rm' program is bad, sorry.])
 1959   fi
 1960 fi
 1961 dnl The trailing newline in this macro's definition is deliberate, for
 1962 dnl backward compatibility and to allow trailing 'dnl'-style comments
 1963 dnl after the AM_INIT_AUTOMAKE invocation. See automake bug#16841.
 1964 ])
 1965 
 1966 dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion.  Do not
 1967 dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further
 1968 dnl mangled by Autoconf and run in a shell conditional statement.
 1969 m4_define([_AC_COMPILER_EXEEXT],
 1970 m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])])
 1971 
 1972 # When config.status generates a header, we must update the stamp-h file.
 1973 # This file resides in the same directory as the config header
 1974 # that is generated.  The stamp files are numbered to have different names.
 1975 
 1976 # Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the
 1977 # loop where config.status creates the headers, so we can generate
 1978 # our stamp files there.
 1979 AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK],
 1980 [# Compute $1's index in $config_headers.
 1981 _am_arg=$1
 1982 _am_stamp_count=1
 1983 for _am_header in $config_headers :; do
 1984   case $_am_header in
 1985     $_am_arg | $_am_arg:* )
 1986       break ;;
 1987     * )
 1988       _am_stamp_count=`expr $_am_stamp_count + 1` ;;
 1989   esac
 1990 done
 1991 echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count])
 1992 
 1993 # Copyright (C) 2001-2018 Free Software Foundation, Inc.
 1994 #
 1995 # This file is free software; the Free Software Foundation
 1996 # gives unlimited permission to copy and/or distribute it,
 1997 # with or without modifications, as long as this notice is preserved.
 1998 
 1999 # AM_PROG_INSTALL_SH
 2000 # ------------------
 2001 # Define $install_sh.
 2002 AC_DEFUN([AM_PROG_INSTALL_SH],
 2003 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
 2004 if test x"${install_sh+set}" != xset; then
 2005   case $am_aux_dir in
 2006   *\ * | *\	*)
 2007     install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;;
 2008   *)
 2009     install_sh="\${SHELL} $am_aux_dir/install-sh"
 2010   esac
 2011 fi
 2012 AC_SUBST([install_sh])])
 2013 
 2014 # Copyright (C) 2003-2018 Free Software Foundation, Inc.
 2015 #
 2016 # This file is free software; the Free Software Foundation
 2017 # gives unlimited permission to copy and/or distribute it,
 2018 # with or without modifications, as long as this notice is preserved.
 2019 
 2020 # Check whether the underlying file-system supports filenames
 2021 # with a leading dot.  For instance MS-DOS doesn't.
 2022 AC_DEFUN([AM_SET_LEADING_DOT],
 2023 [rm -rf .tst 2>/dev/null
 2024 mkdir .tst 2>/dev/null
 2025 if test -d .tst; then
 2026   am__leading_dot=.
 2027 else
 2028   am__leading_dot=_
 2029 fi
 2030 rmdir .tst 2>/dev/null
 2031 AC_SUBST([am__leading_dot])])
 2032 
 2033 # Check to see how 'make' treats includes.	            -*- Autoconf -*-
 2034 
 2035 # Copyright (C) 2001-2018 Free Software Foundation, Inc.
 2036 #
 2037 # This file is free software; the Free Software Foundation
 2038 # gives unlimited permission to copy and/or distribute it,
 2039 # with or without modifications, as long as this notice is preserved.
 2040 
 2041 # AM_MAKE_INCLUDE()
 2042 # -----------------
 2043 # Check whether make has an 'include' directive that can support all
 2044 # the idioms we need for our automatic dependency tracking code.
 2045 AC_DEFUN([AM_MAKE_INCLUDE],
 2046 [AC_MSG_CHECKING([whether ${MAKE-make} supports the include directive])
 2047 cat > confinc.mk << 'END'
 2048 am__doit:
 2049 	@echo this is the am__doit target >confinc.out
 2050 .PHONY: am__doit
 2051 END
 2052 am__include="#"
 2053 am__quote=
 2054 # BSD make does it like this.
 2055 echo '.include "confinc.mk" # ignored' > confmf.BSD
 2056 # Other make implementations (GNU, Solaris 10, AIX) do it like this.
 2057 echo 'include confinc.mk # ignored' > confmf.GNU
 2058 _am_result=no
 2059 for s in GNU BSD; do
 2060   AM_RUN_LOG([${MAKE-make} -f confmf.$s && cat confinc.out])
 2061   AS_CASE([$?:`cat confinc.out 2>/dev/null`],
 2062       ['0:this is the am__doit target'],
 2063       [AS_CASE([$s],
 2064           [BSD], [am__include='.include' am__quote='"'],
 2065           [am__include='include' am__quote=''])])
 2066   if test "$am__include" != "#"; then
 2067     _am_result="yes ($s style)"
 2068     break
 2069   fi
 2070 done
 2071 rm -f confinc.* confmf.*
 2072 AC_MSG_RESULT([${_am_result}])
 2073 AC_SUBST([am__include])])
 2074 AC_SUBST([am__quote])])
 2075 
 2076 # Fake the existence of programs that GNU maintainers use.  -*- Autoconf -*-
 2077 
 2078 # Copyright (C) 1997-2018 Free Software Foundation, Inc.
 2079 #
 2080 # This file is free software; the Free Software Foundation
 2081 # gives unlimited permission to copy and/or distribute it,
 2082 # with or without modifications, as long as this notice is preserved.
 2083 
 2084 # AM_MISSING_PROG(NAME, PROGRAM)
 2085 # ------------------------------
 2086 AC_DEFUN([AM_MISSING_PROG],
 2087 [AC_REQUIRE([AM_MISSING_HAS_RUN])
 2088 $1=${$1-"${am_missing_run}$2"}
 2089 AC_SUBST($1)])
 2090 
 2091 # AM_MISSING_HAS_RUN
 2092 # ------------------
 2093 # Define MISSING if not defined so far and test if it is modern enough.
 2094 # If it is, set am_missing_run to use it, otherwise, to nothing.
 2095 AC_DEFUN([AM_MISSING_HAS_RUN],
 2096 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
 2097 AC_REQUIRE_AUX_FILE([missing])dnl
 2098 if test x"${MISSING+set}" != xset; then
 2099   case $am_aux_dir in
 2100   *\ * | *\	*)
 2101     MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
 2102   *)
 2103     MISSING="\${SHELL} $am_aux_dir/missing" ;;
 2104   esac
 2105 fi
 2106 # Use eval to expand $SHELL
 2107 if eval "$MISSING --is-lightweight"; then
 2108   am_missing_run="$MISSING "
 2109 else
 2110   am_missing_run=
 2111   AC_MSG_WARN(['missing' script is too old or missing])
 2112 fi
 2113 ])
 2114 
 2115 # Helper functions for option handling.                     -*- Autoconf -*-
 2116 
 2117 # Copyright (C) 2001-2018 Free Software Foundation, Inc.
 2118 #
 2119 # This file is free software; the Free Software Foundation
 2120 # gives unlimited permission to copy and/or distribute it,
 2121 # with or without modifications, as long as this notice is preserved.
 2122 
 2123 # _AM_MANGLE_OPTION(NAME)
 2124 # -----------------------
 2125 AC_DEFUN([_AM_MANGLE_OPTION],
 2126 [[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
 2127 
 2128 # _AM_SET_OPTION(NAME)
 2129 # --------------------
 2130 # Set option NAME.  Presently that only means defining a flag for this option.
 2131 AC_DEFUN([_AM_SET_OPTION],
 2132 [m4_define(_AM_MANGLE_OPTION([$1]), [1])])
 2133 
 2134 # _AM_SET_OPTIONS(OPTIONS)
 2135 # ------------------------
 2136 # OPTIONS is a space-separated list of Automake options.
 2137 AC_DEFUN([_AM_SET_OPTIONS],
 2138 [m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
 2139 
 2140 # _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
 2141 # -------------------------------------------
 2142 # Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
 2143 AC_DEFUN([_AM_IF_OPTION],
 2144 [m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
 2145 
 2146 # Copyright (C) 1999-2018 Free Software Foundation, Inc.
 2147 #
 2148 # This file is free software; the Free Software Foundation
 2149 # gives unlimited permission to copy and/or distribute it,
 2150 # with or without modifications, as long as this notice is preserved.
 2151 
 2152 # _AM_PROG_CC_C_O
 2153 # ---------------
 2154 # Like AC_PROG_CC_C_O, but changed for automake.  We rewrite AC_PROG_CC
 2155 # to automatically call this.
 2156 AC_DEFUN([_AM_PROG_CC_C_O],
 2157 [AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
 2158 AC_REQUIRE_AUX_FILE([compile])dnl
 2159 AC_LANG_PUSH([C])dnl
 2160 AC_CACHE_CHECK(
 2161   [whether $CC understands -c and -o together],
 2162   [am_cv_prog_cc_c_o],
 2163   [AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
 2164   # Make sure it works both with $CC and with simple cc.
 2165   # Following AC_PROG_CC_C_O, we do the test twice because some
 2166   # compilers refuse to overwrite an existing .o file with -o,
 2167   # though they will create one.
 2168   am_cv_prog_cc_c_o=yes
 2169   for am_i in 1 2; do
 2170     if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
 2171          && test -f conftest2.$ac_objext; then
 2172       : OK
 2173     else
 2174       am_cv_prog_cc_c_o=no
 2175       break
 2176     fi
 2177   done
 2178   rm -f core conftest*
 2179   unset am_i])
 2180 if test "$am_cv_prog_cc_c_o" != yes; then
 2181    # Losing compiler, so override with the script.
 2182    # FIXME: It is wrong to rewrite CC.
 2183    # But if we don't then we get into trouble of one sort or another.
 2184    # A longer-term fix would be to have automake use am__CC in this case,
 2185    # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
 2186    CC="$am_aux_dir/compile $CC"
 2187 fi
 2188 AC_LANG_POP([C])])
 2189 
 2190 # For backward compatibility.
 2191 AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
 2192 
 2193 # Copyright (C) 2001-2018 Free Software Foundation, Inc.
 2194 #
 2195 # This file is free software; the Free Software Foundation
 2196 # gives unlimited permission to copy and/or distribute it,
 2197 # with or without modifications, as long as this notice is preserved.
 2198 
 2199 # AM_RUN_LOG(COMMAND)
 2200 # -------------------
 2201 # Run COMMAND, save the exit status in ac_status, and log it.
 2202 # (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
 2203 AC_DEFUN([AM_RUN_LOG],
 2204 [{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
 2205    ($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
 2206    ac_status=$?
 2207    echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
 2208    (exit $ac_status); }])
 2209 
 2210 # Check to make sure that the build environment is sane.    -*- Autoconf -*-
 2211 
 2212 # Copyright (C) 1996-2018 Free Software Foundation, Inc.
 2213 #
 2214 # This file is free software; the Free Software Foundation
 2215 # gives unlimited permission to copy and/or distribute it,
 2216 # with or without modifications, as long as this notice is preserved.
 2217 
 2218 # AM_SANITY_CHECK
 2219 # ---------------
 2220 AC_DEFUN([AM_SANITY_CHECK],
 2221 [AC_MSG_CHECKING([whether build environment is sane])
 2222 # Reject unsafe characters in $srcdir or the absolute working directory
 2223 # name.  Accept space and tab only in the latter.
 2224 am_lf='
 2225 '
 2226 case `pwd` in
 2227   *[[\\\"\#\$\&\'\`$am_lf]]*)
 2228     AC_MSG_ERROR([unsafe absolute working directory name]);;
 2229 esac
 2230 case $srcdir in
 2231   *[[\\\"\#\$\&\'\`$am_lf\ \	]]*)
 2232     AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);;
 2233 esac
 2234 
 2235 # Do 'set' in a subshell so we don't clobber the current shell's
 2236 # arguments.  Must try -L first in case configure is actually a
 2237 # symlink; some systems play weird games with the mod time of symlinks
 2238 # (eg FreeBSD returns the mod time of the symlink's containing
 2239 # directory).
 2240 if (
 2241    am_has_slept=no
 2242    for am_try in 1 2; do
 2243      echo "timestamp, slept: $am_has_slept" > conftest.file
 2244      set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
 2245      if test "$[*]" = "X"; then
 2246 	# -L didn't work.
 2247 	set X `ls -t "$srcdir/configure" conftest.file`
 2248      fi
 2249      if test "$[*]" != "X $srcdir/configure conftest.file" \
 2250 	&& test "$[*]" != "X conftest.file $srcdir/configure"; then
 2251 
 2252 	# If neither matched, then we have a broken ls.  This can happen
 2253 	# if, for instance, CONFIG_SHELL is bash and it inherits a
 2254 	# broken ls alias from the environment.  This has actually
 2255 	# happened.  Such a system could not be considered "sane".
 2256 	AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
 2257   alias in your environment])
 2258      fi
 2259      if test "$[2]" = conftest.file || test $am_try -eq 2; then
 2260        break
 2261      fi
 2262      # Just in case.
 2263      sleep 1
 2264      am_has_slept=yes
 2265    done
 2266    test "$[2]" = conftest.file
 2267    )
 2268 then
 2269    # Ok.
 2270    :
 2271 else
 2272    AC_MSG_ERROR([newly created file is older than distributed files!
 2273 Check your system clock])
 2274 fi
 2275 AC_MSG_RESULT([yes])
 2276 # If we didn't sleep, we still need to ensure time stamps of config.status and
 2277 # generated files are strictly newer.
 2278 am_sleep_pid=
 2279 if grep 'slept: no' conftest.file >/dev/null 2>&1; then
 2280   ( sleep 1 ) &
 2281   am_sleep_pid=$!
 2282 fi
 2283 AC_CONFIG_COMMANDS_PRE(
 2284   [AC_MSG_CHECKING([that generated files are newer than configure])
 2285    if test -n "$am_sleep_pid"; then
 2286      # Hide warnings about reused PIDs.
 2287      wait $am_sleep_pid 2>/dev/null
 2288    fi
 2289    AC_MSG_RESULT([done])])
 2290 rm -f conftest.file
 2291 ])
 2292 
 2293 # Copyright (C) 2009-2018 Free Software Foundation, Inc.
 2294 #
 2295 # This file is free software; the Free Software Foundation
 2296 # gives unlimited permission to copy and/or distribute it,
 2297 # with or without modifications, as long as this notice is preserved.
 2298 
 2299 # AM_SILENT_RULES([DEFAULT])
 2300 # --------------------------
 2301 # Enable less verbose build rules; with the default set to DEFAULT
 2302 # ("yes" being less verbose, "no" or empty being verbose).
 2303 AC_DEFUN([AM_SILENT_RULES],
 2304 [AC_ARG_ENABLE([silent-rules], [dnl
 2305 AS_HELP_STRING(
 2306   [--enable-silent-rules],
 2307   [less verbose build output (undo: "make V=1")])
 2308 AS_HELP_STRING(
 2309   [--disable-silent-rules],
 2310   [verbose build output (undo: "make V=0")])dnl
 2311 ])
 2312 case $enable_silent_rules in @%:@ (((
 2313   yes) AM_DEFAULT_VERBOSITY=0;;
 2314    no) AM_DEFAULT_VERBOSITY=1;;
 2315     *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);;
 2316 esac
 2317 dnl
 2318 dnl A few 'make' implementations (e.g., NonStop OS and NextStep)
 2319 dnl do not support nested variable expansions.
 2320 dnl See automake bug#9928 and bug#10237.
 2321 am_make=${MAKE-make}
 2322 AC_CACHE_CHECK([whether $am_make supports nested variables],
 2323    [am_cv_make_support_nested_variables],
 2324    [if AS_ECHO([['TRUE=$(BAR$(V))
 2325 BAR0=false
 2326 BAR1=true
 2327 V=1
 2328 am__doit:
 2329 	@$(TRUE)
 2330 .PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then
 2331   am_cv_make_support_nested_variables=yes
 2332 else
 2333   am_cv_make_support_nested_variables=no
 2334 fi])
 2335 if test $am_cv_make_support_nested_variables = yes; then
 2336   dnl Using '$V' instead of '$(V)' breaks IRIX make.
 2337   AM_V='$(V)'
 2338   AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
 2339 else
 2340   AM_V=$AM_DEFAULT_VERBOSITY
 2341   AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
 2342 fi
 2343 AC_SUBST([AM_V])dnl
 2344 AM_SUBST_NOTMAKE([AM_V])dnl
 2345 AC_SUBST([AM_DEFAULT_V])dnl
 2346 AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl
 2347 AC_SUBST([AM_DEFAULT_VERBOSITY])dnl
 2348 AM_BACKSLASH='\'
 2349 AC_SUBST([AM_BACKSLASH])dnl
 2350 _AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl
 2351 ])
 2352 
 2353 # Copyright (C) 2001-2018 Free Software Foundation, Inc.
 2354 #
 2355 # This file is free software; the Free Software Foundation
 2356 # gives unlimited permission to copy and/or distribute it,
 2357 # with or without modifications, as long as this notice is preserved.
 2358 
 2359 # AM_PROG_INSTALL_STRIP
 2360 # ---------------------
 2361 # One issue with vendor 'install' (even GNU) is that you can't
 2362 # specify the program used to strip binaries.  This is especially
 2363 # annoying in cross-compiling environments, where the build's strip
 2364 # is unlikely to handle the host's binaries.
 2365 # Fortunately install-sh will honor a STRIPPROG variable, so we
 2366 # always use install-sh in "make install-strip", and initialize
 2367 # STRIPPROG with the value of the STRIP variable (set by the user).
 2368 AC_DEFUN([AM_PROG_INSTALL_STRIP],
 2369 [AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
 2370 # Installed binaries are usually stripped using 'strip' when the user
 2371 # run "make install-strip".  However 'strip' might not be the right
 2372 # tool to use in cross-compilation environments, therefore Automake
 2373 # will honor the 'STRIP' environment variable to overrule this program.
 2374 dnl Don't test for $cross_compiling = yes, because it might be 'maybe'.
 2375 if test "$cross_compiling" != no; then
 2376   AC_CHECK_TOOL([STRIP], [strip], :)
 2377 fi
 2378 INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
 2379 AC_SUBST([INSTALL_STRIP_PROGRAM])])
 2380 
 2381 # Copyright (C) 2006-2018 Free Software Foundation, Inc.
 2382 #
 2383 # This file is free software; the Free Software Foundation
 2384 # gives unlimited permission to copy and/or distribute it,
 2385 # with or without modifications, as long as this notice is preserved.
 2386 
 2387 # _AM_SUBST_NOTMAKE(VARIABLE)
 2388 # ---------------------------
 2389 # Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.
 2390 # This macro is traced by Automake.
 2391 AC_DEFUN([_AM_SUBST_NOTMAKE])
 2392 
 2393 # AM_SUBST_NOTMAKE(VARIABLE)
 2394 # --------------------------
 2395 # Public sister of _AM_SUBST_NOTMAKE.
 2396 AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
 2397 
 2398 # Check how to create a tarball.                            -*- Autoconf -*-
 2399 
 2400 # Copyright (C) 2004-2018 Free Software Foundation, Inc.
 2401 #
 2402 # This file is free software; the Free Software Foundation
 2403 # gives unlimited permission to copy and/or distribute it,
 2404 # with or without modifications, as long as this notice is preserved.
 2405 
 2406 # _AM_PROG_TAR(FORMAT)
 2407 # --------------------
 2408 # Check how to create a tarball in format FORMAT.
 2409 # FORMAT should be one of 'v7', 'ustar', or 'pax'.
 2410 #
 2411 # Substitute a variable $(am__tar) that is a command
 2412 # writing to stdout a FORMAT-tarball containing the directory
 2413 # $tardir.
 2414 #     tardir=directory && $(am__tar) > result.tar
 2415 #
 2416 # Substitute a variable $(am__untar) that extract such
 2417 # a tarball read from stdin.
 2418 #     $(am__untar) < result.tar
 2419 #
 2420 AC_DEFUN([_AM_PROG_TAR],
 2421 [# Always define AMTAR for backward compatibility.  Yes, it's still used
 2422 # in the wild :-(  We should find a proper way to deprecate it ...
 2423 AC_SUBST([AMTAR], ['$${TAR-tar}'])
 2424 
 2425 # We'll loop over all known methods to create a tar archive until one works.
 2426 _am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
 2427 
 2428 m4_if([$1], [v7],
 2429   [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
 2430 
 2431   [m4_case([$1],
 2432     [ustar],
 2433      [# The POSIX 1988 'ustar' format is defined with fixed-size fields.
 2434       # There is notably a 21 bits limit for the UID and the GID.  In fact,
 2435       # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343
 2436       # and bug#13588).
 2437       am_max_uid=2097151 # 2^21 - 1
 2438       am_max_gid=$am_max_uid
 2439       # The $UID and $GID variables are not portable, so we need to resort
 2440       # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls
 2441       # below are definitely unexpected, so allow the users to see them
 2442       # (that is, avoid stderr redirection).
 2443       am_uid=`id -u || echo unknown`
 2444       am_gid=`id -g || echo unknown`
 2445       AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])
 2446       if test $am_uid -le $am_max_uid; then
 2447          AC_MSG_RESULT([yes])
 2448       else
 2449          AC_MSG_RESULT([no])
 2450          _am_tools=none
 2451       fi
 2452       AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])
 2453       if test $am_gid -le $am_max_gid; then
 2454          AC_MSG_RESULT([yes])
 2455       else
 2456         AC_MSG_RESULT([no])
 2457         _am_tools=none
 2458       fi],
 2459 
 2460   [pax],
 2461     [],
 2462 
 2463   [m4_fatal([Unknown tar format])])
 2464 
 2465   AC_MSG_CHECKING([how to create a $1 tar archive])
 2466 
 2467   # Go ahead even if we have the value already cached.  We do so because we
 2468   # need to set the values for the 'am__tar' and 'am__untar' variables.
 2469   _am_tools=${am_cv_prog_tar_$1-$_am_tools}
 2470 
 2471   for _am_tool in $_am_tools; do
 2472     case $_am_tool in
 2473     gnutar)
 2474       for _am_tar in tar gnutar gtar; do
 2475         AM_RUN_LOG([$_am_tar --version]) && break
 2476       done
 2477       am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
 2478       am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
 2479       am__untar="$_am_tar -xf -"
 2480       ;;
 2481     plaintar)
 2482       # Must skip GNU tar: if it does not support --format= it doesn't create
 2483       # ustar tarball either.
 2484       (tar --version) >/dev/null 2>&1 && continue
 2485       am__tar='tar chf - "$$tardir"'
 2486       am__tar_='tar chf - "$tardir"'
 2487       am__untar='tar xf -'
 2488       ;;
 2489     pax)
 2490       am__tar='pax -L -x $1 -w "$$tardir"'
 2491       am__tar_='pax -L -x $1 -w "$tardir"'
 2492       am__untar='pax -r'
 2493       ;;
 2494     cpio)
 2495       am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
 2496       am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
 2497       am__untar='cpio -i -H $1 -d'
 2498       ;;
 2499     none)
 2500       am__tar=false
 2501       am__tar_=false
 2502       am__untar=false
 2503       ;;
 2504     esac
 2505 
 2506     # If the value was cached, stop now.  We just wanted to have am__tar
 2507     # and am__untar set.
 2508     test -n "${am_cv_prog_tar_$1}" && break
 2509 
 2510     # tar/untar a dummy directory, and stop if the command works.
 2511     rm -rf conftest.dir
 2512     mkdir conftest.dir
 2513     echo GrepMe > conftest.dir/file
 2514     AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
 2515     rm -rf conftest.dir
 2516     if test -s conftest.tar; then
 2517       AM_RUN_LOG([$am__untar <conftest.tar])
 2518       AM_RUN_LOG([cat conftest.dir/file])
 2519       grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
 2520     fi
 2521   done
 2522   rm -rf conftest.dir
 2523 
 2524   AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
 2525   AC_MSG_RESULT([$am_cv_prog_tar_$1])])
 2526 
 2527 AC_SUBST([am__tar])
 2528 AC_SUBST([am__untar])
 2529 ]) # _AM_PROG_TAR
 2530