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ntp 4.2.6p5

dnl  -*- buffer-read-only: t -*- vi: set ro:
dnl 
dnl DO NOT EDIT THIS FILE   (libopts.m4)
dnl 
dnl It has been AutoGen-ed  April 29, 2011 at 03:43:56 PM by AutoGen 5.11.9
dnl From the definitions    libopts.def
dnl and the template file   conftest.tpl
dnl
dnl do always before generated macros:
dnl
AC_DEFUN([INVOKE_LIBOPTS_MACROS_FIRST],[
  AC_REQUIRE([AC_HEADER_STDC])
  AC_HEADER_DIRENT
  
  # =================
  # AC_CHECK_HEADERS
  # =================
  AC_CHECK_HEADERS([ \
      dlfcn.h      errno.h       fcntl.h       libgen.h     \
      memory.h     netinet/in.h  setjmp.h      sys/mman.h   \
      sys/param.h  sys/poll.h    sys/procset.h sys/select.h \
      sys/socket.h sys/stropts.h sys/time.h    sys/un.h     \
      sys/wait.h   unistd.h      utime.h       sysexits.h ])
  
  AC_CHECK_HEADERS([stdarg.h     varargs.h],
      [lo_have_arg_hdr=true;break],
      [lo_have_arg_hdr=false])
  
  AC_CHECK_HEADERS([string.h     strings.h],
      [lo_have_str_hdr=true;break],
      [lo_have_str_hdr=false])
  
  AC_CHECK_HEADERS([limits.h     sys/limits.h  values.h],
      [lo_have_lim_hdr=true;break],
      [lo_have_lim_hdr=false])
  
  AC_CHECK_HEADERS([inttypes.h   stdint.h],
      [lo_have_typ_hdr=true;break],
      [lo_have_typ_hdr=false])
  
  # ----------------------------------------------------------------------
  # check for various programs used during the build.
  # On OS/X, "wchar.h" needs "runetype.h" to work properly.
  # ----------------------------------------------------------------------
  AC_CHECK_HEADERS([runetype.h wchar.h], [], [],[
  AC_INCLUDES_DEFAULT
  #if HAVE_RUNETYPE_H
  # include <runetype.h>
  #endif
  ])
  
  # --------------------------------------------
  # Verify certain entries from AC_CHECK_HEADERS
  # --------------------------------------------
  [for f in sys_types sys_mman sys_param sys_stat sys_wait \
           string errno stdlib memory setjmp
  do eval as_ac_var=\${ac_cv_header_${f}_h+set}
     test "${as_ac_var}" = set || {
       ]AC_MSG_ERROR([You must have ${f}.h on your system])[
     }
  done
  
  ${lo_have_arg_hdr} || \
    ]AC_MSG_ERROR([You must have stdarg.h or varargs.h on your system])[
  
  ${lo_have_str_hdr} || \
    ]AC_MSG_ERROR([You must have string.h or strings.h on your system])[
  
  ${lo_have_lim_hdr} || \
    ]AC_MSG_ERROR(
      [You must have one of limits.h, sys/limits.h or values.h])[
  
  ${lo_have_typ_hdr} || \
    ]AC_MSG_ERROR([You must have inttypes.h or stdint.h on your system])
  
  # ----------------------------------------------------------------------
  # Checks for typedefs
  # ----------------------------------------------------------------------
  AC_CHECK_TYPES(wchar_t)
  AC_CHECK_TYPES(wint_t, [], [], [
  AC_INCLUDES_DEFAULT
  #if HAVE_RUNETYPE_H
  # include <runetype.h>
  #endif
  #if HAVE_WCHAR_H
  # include <wchar.h>
  #endif
  ])
  AC_CHECK_TYPES([int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t,
     intptr_t, uintptr_t, uint_t, pid_t, size_t])
  
  # =====
  # sizes
  # =====
  AC_CHECK_SIZEOF(char*, 8)
  AC_CHECK_SIZEOF(int,   4)
  AC_CHECK_SIZEOF(long,  8)
  AC_CHECK_SIZEOF(short, 2)
  
  # ----------------------------------------------------------------------
  # AC_CHECK_LIB for SVR4 libgen, and use it if it defines pathfind.
  # ----------------------------------------------------------------------
  AC_CHECK_LIB(gen, pathfind)
  AC_FUNC_VPRINTF
  AC_FUNC_FORK
  AC_CHECK_FUNCS([mmap canonicalize_file_name snprintf strdup strchr \
                 strrchr strsignal])
  AC_PROG_SED
  [while :
  do
      POSIX_SHELL=`which bash`
      test -x "$POSIX_SHELL" && break
      POSIX_SHELL=`which dash`
      test -x "$POSIX_SHELL" && break
      POSIX_SHELL=/usr/xpg4/bin/sh
      test -x "$POSIX_SHELL" && break
      POSIX_SHELL=`/bin/sh -c '
          exec 2>/dev/null
          if ! true ; then exit 1 ; fi
          echo /bin/sh'`
      test -x "$POSIX_SHELL" && break
      ]AC_ERROR([Cannot locate a working POSIX shell])[
  done]
  AC_DEFINE_UNQUOTED([POSIX_SHELL], ["${POSIX_SHELL}"],
           [define to a working POSIX compliant shell])
  AC_SUBST([POSIX_SHELL])
])

dnl
dnl @synopsis  INVOKE_LIBOPTS_MACROS
dnl
dnl  This macro will invoke the AutoConf macros specified in libopts.def
dnl  that have not been disabled with "omit-invocation".
dnl
AC_DEFUN([LIBOPTS_WITH_REGEX_HEADER],[
  AC_ARG_WITH([regex-header],
    AS_HELP_STRING([--with-regex-header], [a reg expr header is specified]),
    [libopts_cv_with_regex_header=${with_regex_header}],
    AC_CACHE_CHECK([whether a reg expr header is specified], libopts_cv_with_regex_header,
      libopts_cv_with_regex_header=no)
  ) # end of AC_ARG_WITH
  if test "X${libopts_cv_with_regex_header}" != Xno
  then
    AC_DEFINE_UNQUOTED([REGEX_HEADER],[<${libopts_cv_with_regex_header}>])
  else
    AC_DEFINE([REGEX_HEADER],[<regex.h>],[name of regex header file])
  fi
  
]) # end of AC_DEFUN of LIBOPTS_WITH_REGEX_HEADER


AC_DEFUN([LIBOPTS_WITHLIB_REGEX],[
  AC_ARG_WITH([libregex],
    AS_HELP_STRING([--with-libregex], [libregex installation prefix]),
    [libopts_cv_with_libregex_root=${with_libregex}],
    AC_CACHE_CHECK([whether with-libregex was specified], libopts_cv_with_libregex_root,
      libopts_cv_with_libregex_root=no)
  ) # end of AC_ARG_WITH libregex

  if test "${with_libregex+set}" = set && \
     test "${withval}" = no
  then ## disabled by request
    libopts_cv_with_libregex_root=no
    libopts_cv_with_libregex_cflags=no
    libopts_cv_with_libregex_libs=no
  else

  AC_ARG_WITH([libregex-cflags],
    AS_HELP_STRING([--with-libregex-cflags], [libregex compile flags]),
    [libopts_cv_with_libregex_cflags=${with_regex_cflags}],
    AC_CACHE_CHECK([whether with-libregex-cflags was specified], libopts_cv_with_libregex_cflags,
      libopts_cv_with_libregex_cflags=no)
  ) # end of AC_ARG_WITH libregex-cflags

  AC_ARG_WITH([libregex-libs],
    AS_HELP_STRING([--with-libregex-libs], [libregex link command arguments]),
    [libopts_cv_with_libregex_libs=${with_regex_libs}],
    AC_CACHE_CHECK([whether with-libregex-libs was specified], libopts_cv_with_libregex_libs,
      libopts_cv_with_libregex_libs=no)
  ) # end of AC_ARG_WITH libregex-libs

  case "X${libopts_cv_with_libregex_cflags}" in
  Xyes|Xno|X )
    case "X${libopts_cv_with_libregex_root}" in
    Xyes|Xno|X ) libopts_cv_with_libregex_cflags=no ;;
    * )        libopts_cv_with_libregex_cflags=-I${libopts_cv_with_libregex_root}/include ;;
    esac
  esac
  case "X${libopts_cv_with_libregex_libs}" in
  Xyes|Xno|X )
    case "X${libopts_cv_with_libregex_root}" in
    Xyes|Xno|X ) libopts_cv_with_libregex_libs=no ;;
    * )        libopts_cv_with_libregex_libs="-L${libopts_cv_with_libregex_root}/lib -lregex";;
    esac
  esac
  libopts_save_CPPFLAGS="${CPPFLAGS}"
  libopts_save_LIBS="${LIBS}"
  fi ## disabled by request

  case "X${libopts_cv_with_libregex_cflags}" in
  Xyes|Xno|X )
    libopts_cv_with_libregex_cflags="" ;;
  * ) CPPFLAGS="${CPPFLAGS} ${libopts_cv_with_libregex_cflags}" ;;
  esac
  case "X${libopts_cv_with_libregex_libs}" in
  Xyes|Xno|X )
    libopts_cv_with_libregex_libs="" ;;
  * )
    LIBS="${LIBS} ${libopts_cv_with_libregex_libs}" ;;
  esac
  LIBREGEX_CFLAGS=""
  LIBREGEX_LIBS=""
  AC_MSG_CHECKING([whether libregex functions properly])
  AC_CACHE_VAL([libopts_cv_with_libregex],[
  AC_TRY_RUN([@%:@include <stdio.h>
@%:@include <stdlib.h>
@%:@include <sys/types.h>
@%:@include REGEX_HEADER
static regex_t re;
void comp_re( char const* pzPat ) {
  int res = regcomp( &re, pzPat, REG_EXTENDED|REG_ICASE|REG_NEWLINE );
  if (res == 0) return;
  exit( res ); }
int main() {
  regmatch_t m@<:@2@:>@;
  comp_re( "^.*\@S|@"   );
  comp_re( "()|no.*" );
  comp_re( "."       );
  if (regexec( &re, "X", 2, m, 0 ) != 0)  return 1;
  if ((m@<:@0@:>@.rm_so != 0) || (m@<:@0@:>@.rm_eo != 1)) {
    fputs( "error: regex -->.<-- did not match\n", stderr );
    return 1;
  }
  return 0; }],
    [libopts_cv_with_libregex=yes], [libopts_cv_with_libregex=no],
    [libopts_cv_with_libregex=no]) # end of AC_TRY_RUN 
  ]) # end of AC_CACHE_VAL for libopts_cv_with_libregex
  AC_MSG_RESULT([${libopts_cv_with_libregex}])
  if test "X${libopts_cv_with_libregex}" != Xno
  then
    AC_DEFINE([WITH_LIBREGEX],[1],
        [Define this if a working libregex can be found])
  else
    CPPFLAGS="${libopts_save_CPPFLAGS}"
    LIBS="${libopts_save_LIBS}"
  fi
  
]) # end of AC_DEFUN of LIBOPTS_WITHLIB_REGEX


AC_DEFUN([LIBOPTS_RUN_PATHFIND],[
  AC_MSG_CHECKING([whether pathfind(3) works])
  AC_CACHE_VAL([libopts_cv_run_pathfind],[
  AC_TRY_RUN([@%:@include <string.h>
@%:@include <stdlib.h>
int main (int argc, char** argv) {
   char* pz = pathfind( getenv( "PATH" ), "sh", "x" );
   return (pz == 0) ? 1 : 0;
}],
    [libopts_cv_run_pathfind=yes],[libopts_cv_run_pathfind=no],[libopts_cv_run_pathfind=no]
  ) # end of TRY_RUN
  ]) # end of AC_CACHE_VAL for libopts_cv_run_pathfind
  AC_MSG_RESULT([${libopts_cv_run_pathfind}])
  if test "X${libopts_cv_run_pathfind}" != Xno
  then
    AC_DEFINE([HAVE_PATHFIND],[1],
        [Define this if pathfind(3) works])
  fi
  
]) # end of AC_DEFUN of LIBOPTS_RUN_PATHFIND


AC_DEFUN([LIBOPTS_TEST_DEV_ZERO],[
  AC_MSG_CHECKING([whether /dev/zero is readable device])
  AC_CACHE_VAL([libopts_cv_test_dev_zero],[
    libopts_cv_test_dev_zero=`exec 2> /dev/null
dzero=\`ls -lL /dev/zero | egrep ^c......r\`
test -z "${dzero}" && exit 1
echo ${dzero}`
    if test $? -ne 0 || test -z "$libopts_cv_test_dev_zero"
    then libopts_cv_test_dev_zero=no
    fi
  ]) # end of CACHE_VAL of libopts_cv_test_dev_zero
  AC_MSG_RESULT([${libopts_cv_test_dev_zero}])
  if test "X${libopts_cv_test_dev_zero}" != Xno
  then
    AC_DEFINE([HAVE_DEV_ZERO],[1],
        [Define this if /dev/zero is readable device])
  fi
  
]) # end of AC_DEFUN of LIBOPTS_TEST_DEV_ZERO


AC_DEFUN([LIBOPTS_RUN_REALPATH],[
  AC_MSG_CHECKING([whether we have a functional realpath(3C)])
  AC_CACHE_VAL([libopts_cv_run_realpath],[
  AC_TRY_RUN([@%:@include <limits.h>
@%:@include <stdlib.h>
int main (int argc, char** argv) {
@%:@ifndef PATH_MAX
choke me!!
@%:@else
   char zPath@<:@PATH_MAX+1@:>@;
@%:@endif
   char *pz = realpath(argv@<:@0@:>@, zPath);
   return (pz == zPath) ? 0 : 1;
}],
    [libopts_cv_run_realpath=yes],[libopts_cv_run_realpath=no],[libopts_cv_run_realpath=no]
  ) # end of TRY_RUN
  ]) # end of AC_CACHE_VAL for libopts_cv_run_realpath
  AC_MSG_RESULT([${libopts_cv_run_realpath}])
  if test "X${libopts_cv_run_realpath}" != Xno
  then
    AC_DEFINE([HAVE_REALPATH],[1],
        [Define this if we have a functional realpath(3C)])
  fi
  
]) # end of AC_DEFUN of LIBOPTS_RUN_REALPATH


AC_DEFUN([LIBOPTS_RUN_STRFTIME],[
  AC_MSG_CHECKING([whether strftime() works])
  AC_CACHE_VAL([libopts_cv_run_strftime],[
  AC_TRY_RUN([@%:@include <time.h>
@%:@include <string.h>
char t_buf@<:@ 64 @:>@;
int main() {
  static char const z@<:@@:>@ = "Thursday Aug 28 240";
  struct tm tm;
  tm.tm_sec   = 36;  /* seconds after the minute @<:@0, 61@:>@  */
  tm.tm_min   = 44;  /* minutes after the hour @<:@0, 59@:>@ */
  tm.tm_hour  = 12;  /* hour since midnight @<:@0, 23@:>@ */
  tm.tm_mday  = 28;  /* day of the month @<:@1, 31@:>@ */
  tm.tm_mon   =  7;  /* months since January @<:@0, 11@:>@ */
  tm.tm_year  = 86;  /* years since 1900 */
  tm.tm_wday  =  4;  /* days since Sunday @<:@0, 6@:>@ */
  tm.tm_yday  = 239; /* days since January 1 @<:@0, 365@:>@ */
  tm.tm_isdst =  1;  /* flag for daylight savings time */
  strftime( t_buf, sizeof( t_buf ), "%A %b %d %j", &tm );
  return (strcmp( t_buf, z ) != 0); }],
    [libopts_cv_run_strftime=yes],[libopts_cv_run_strftime=no],[libopts_cv_run_strftime=no]
  ) # end of TRY_RUN
  ]) # end of AC_CACHE_VAL for libopts_cv_run_strftime
  AC_MSG_RESULT([${libopts_cv_run_strftime}])
  if test "X${libopts_cv_run_strftime}" != Xno
  then
    AC_DEFINE([HAVE_STRFTIME],[1],
        [Define this if strftime() works])
  fi
  
]) # end of AC_DEFUN of LIBOPTS_RUN_STRFTIME


AC_DEFUN([LIBOPTS_RUN_FOPEN_BINARY],[
  AC_MSG_CHECKING([whether fopen accepts "b" mode])
  AC_CACHE_VAL([libopts_cv_run_fopen_binary],[
  AC_TRY_RUN([@%:@include <stdio.h>
int main (int argc, char** argv) {
FILE* fp = fopen("conftest.@S|@ac_ext", "rb");
return (fp == NULL) ? 1 : fclose(fp); }],
    [libopts_cv_run_fopen_binary=yes],[libopts_cv_run_fopen_binary=no],[libopts_cv_run_fopen_binary=no]
  ) # end of TRY_RUN
  ]) # end of AC_CACHE_VAL for libopts_cv_run_fopen_binary
  AC_MSG_RESULT([${libopts_cv_run_fopen_binary}])
  if test "X${libopts_cv_run_fopen_binary}" != Xno
  then
    AC_DEFINE([FOPEN_BINARY_FLAG],"b",
	[fopen(3) accepts a 'b' in the mode flag])
  else
    AC_DEFINE([FOPEN_BINARY_FLAG],"",
	[fopen(3) accepts a 'b' in the mode flag])
  fi
  
]) # end of AC_DEFUN of LIBOPTS_RUN_FOPEN_BINARY


AC_DEFUN([LIBOPTS_RUN_FOPEN_TEXT],[
  AC_MSG_CHECKING([whether fopen accepts "t" mode])
  AC_CACHE_VAL([libopts_cv_run_fopen_text],[
  AC_TRY_RUN([@%:@include <stdio.h>
int main (int argc, char** argv) {
FILE* fp = fopen("conftest.@S|@ac_ext", "rt");
return (fp == NULL) ? 1 : fclose(fp); }],
    [libopts_cv_run_fopen_text=yes],[libopts_cv_run_fopen_text=no],[libopts_cv_run_fopen_text=no]
  ) # end of TRY_RUN
  ]) # end of AC_CACHE_VAL for libopts_cv_run_fopen_text
  AC_MSG_RESULT([${libopts_cv_run_fopen_text}])
  if test "X${libopts_cv_run_fopen_text}" != Xno
  then
    AC_DEFINE([FOPEN_TEXT_FLAG],"t",
	[fopen(3) accepts a 't' in the mode flag])
  else
    AC_DEFINE([FOPEN_TEXT_FLAG],"",
	[fopen(3) accepts a 't' in the mode flag])
  fi
  
]) # end of AC_DEFUN of LIBOPTS_RUN_FOPEN_TEXT


AC_DEFUN([LIBOPTS_DISABLE_OPTIONAL_ARGS],[
  AC_ARG_ENABLE([optional-args],
    AS_HELP_STRING([--disable-optional-args], [not wanting optional option args]),
    [libopts_cv_enable_optional_args=${enable_optional_args}],
    AC_CACHE_CHECK([whether not wanting optional option args], libopts_cv_enable_optional_args,
      libopts_cv_enable_optional_args=yes)
  ) # end of AC_ARG_ENABLE
  if test "X${libopts_cv_enable_optional_args}" = Xno
  then
    AC_DEFINE([NO_OPTIONAL_OPT_ARGS], [1],
          [Define this if optional arguments are disallowed])
  fi
  
]) # end of AC_DEFUN of LIBOPTS_DISABLE_OPTIONAL_ARGS


AC_DEFUN([INVOKE_LIBOPTS_MACROS],[
  AC_REQUIRE([INVOKE_LIBOPTS_MACROS_FIRST])
  # Check to see if a reg expr header is specified.
  LIBOPTS_WITH_REGEX_HEADER

  # Check to see if a working libregex can be found.
  LIBOPTS_WITHLIB_REGEX

  # Check to see if pathfind(3) works.
  LIBOPTS_RUN_PATHFIND

  # Check to see if /dev/zero is readable device.
  LIBOPTS_TEST_DEV_ZERO

  # Check to see if we have a functional realpath(3C).
  LIBOPTS_RUN_REALPATH

  # Check to see if strftime() works.
  LIBOPTS_RUN_STRFTIME

  # Check to see if fopen accepts "b" mode.
  LIBOPTS_RUN_FOPEN_BINARY

  # Check to see if fopen accepts "t" mode.
  LIBOPTS_RUN_FOPEN_TEXT

  # Check to see if not wanting optional option args.
  LIBOPTS_DISABLE_OPTIONAL_ARGS

]) # end AC_DEFUN of INVOKE_LIBOPTS_MACROS

dnl @synopsis  LIBOPTS_CHECK
dnl
dnl Time-stamp:        "2010-11-29 15:45:54 bkorb"
dnl
dnl If autoopts-config works, add the linking information to LIBS.
dnl Otherwise, add ``libopts-${ao_rev}'' to SUBDIRS and run all
dnl the config tests that the library needs.  Invoke the
dnl "INVOKE_LIBOPTS_MACROS" macro iff we are building libopts.
dnl
dnl  This file is part of AutoGen.
dnl  AutoGen Copyright (c) 1992-2011 by Bruce Korb - all rights reserved
dnl
dnl  AutoGen is free software: you can redistribute it and/or modify it
dnl  under the terms of the GNU General Public License as published by the
dnl  Free Software Foundation, either version 3 of the License, or
dnl  (at your option) any later version.
dnl
dnl  AutoGen is distributed in the hope that it will be useful, but
dnl  WITHOUT ANY WARRANTY; without even the implied warranty of
dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
dnl  See the GNU General Public License for more details.
dnl
dnl  You should have received a copy of the GNU General Public License along
dnl  with this program.  If not, see <http://www.gnu.org/licenses/>.
dnl
dnl Default to system libopts
dnl
AC_DEFUN([LIBOPTS_CHECK_COMMON],[
  AC_REQUIRE([INVOKE_LIBOPTS_MACROS_FIRST])
  [NEED_LIBOPTS_DIR='']
  m4_pushdef([AO_Libopts_Dir],
	    [ifelse($1, , [libopts], [$1])])
  AC_ARG_ENABLE([local-libopts],
    AC_HELP_STRING([--enable-local-libopts],
       [Force using the supplied libopts tearoff code]),[
    if test x$enableval = xyes ; then
       AC_MSG_NOTICE([Using supplied libopts tearoff])
       LIBOPTS_LDADD='$(top_builddir)/AO_Libopts_Dir/libopts.la'
       LIBOPTS_CFLAGS='-I$(top_srcdir)/AO_Libopts_Dir'
       NEED_LIBOPTS_DIR=true
    fi])

  AC_ARG_ENABLE([libopts-install],
    AC_HELP_STRING([--disable-libopts-install],
       [Do not install libopts with client installation]))
  AM_CONDITIONAL([INSTALL_LIBOPTS],[test "X${enable_libopts_install}" != Xno])

  [if test -z "${NEED_LIBOPTS_DIR}" ; then]
     AC_MSG_CHECKING([whether autoopts-config can be found])
     AC_ARG_WITH([autoopts-config],
        AC_HELP_STRING([--with-autoopts-config],
             [specify the config-info script]),
        [lo_cv_with_autoopts_config=${with_autoopts_config}],
        AC_CACHE_CHECK([whether autoopts-config is specified],
             [lo_cv_with_autoopts_config],
             [if autoopts-config --help 2>/dev/null 1>&2
        then lo_cv_with_autoopts_config=autoopts-config
        elif libopts-config --help 2>/dev/null 1>&2
        then lo_cv_with_autoopts_config=libopts-config
        else lo_cv_with_autoopts_config=no ; fi])
     ) # end of AC_ARG_WITH

     AC_CACHE_VAL([lo_cv_test_autoopts],[
        if test -z "${lo_cv_with_autoopts_config}" \
                -o X"${lo_cv_with_autoopts_config}" = Xno
        then
           if autoopts-config --help 2>/dev/null 1>&2
           then lo_cv_with_autoopts_config=autoopts-config
           elif libopts-config --help 2>/dev/null 1>&2
           then lo_cv_with_autoopts_config=libopts-config
           else lo_cv_with_autoopts_config=false ; fi
        fi
        lo_cv_test_autoopts=`
            ${lo_cv_with_autoopts_config} --libs` 2> /dev/null
        if test $? -ne 0 -o -z "${lo_cv_test_autoopts}"
        then lo_cv_test_autoopts=no ; fi
     ]) # end of CACHE_VAL
     AC_MSG_RESULT([${lo_cv_test_autoopts}])

     [if test "X${lo_cv_test_autoopts}" != Xno
     then
        LIBOPTS_LDADD="${lo_cv_test_autoopts}"
        LIBOPTS_CFLAGS="`${lo_cv_with_autoopts_config} --cflags`"
     else
        LIBOPTS_LDADD='$(top_builddir)/]AO_Libopts_Dir[/libopts.la'
        LIBOPTS_CFLAGS='-I$(top_srcdir)/]AO_Libopts_Dir['
        NEED_LIBOPTS_DIR=true
     fi
  fi # end of if test -z "${NEED_LIBOPTS_DIR}"
  if test -n "${LIBOPTS_BUILD_BLOCKED}" ; then
    NEED_LIBOPTS_DIR=''
  fi]
  AM_CONDITIONAL([NEED_LIBOPTS], [test -n "${NEED_LIBOPTS_DIR}"])
  AC_SUBST(LIBOPTS_LDADD)
  AC_SUBST(LIBOPTS_CFLAGS)
  AC_SUBST(LIBOPTS_DIR, AO_Libopts_Dir)
  m4_popdef([AO_Libopts_Dir])
[# end of AC_DEFUN of LIBOPTS_CHECK_COMMON]
])
dnl AC_CONFIG_FILES conditionalization requires using AM_COND_IF, however
dnl AM_COND_IF is new to Automake 1.11.  To use it on new Automake without
dnl requiring same, a fallback implementation for older Automake is provided.
dnl Note that disabling of AC_CONFIG_FILES requires Automake 1.11, this code
dnl is correct only in terms of m4sh generated script.
m4_ifndef([AM_COND_IF], [AC_DEFUN([AM_COND_IF], [
if test -z "$$1_TRUE"; then :
  m4_n([$2])[]dnl
m4_ifval([$3],
[else
  $3
])dnl
fi[]dnl
])])
dnl
AC_DEFUN([LIBOPTS_CHECK_NOBUILD], [
  m4_pushdef([AO_Libopts_Dir],
	      [ifelse($1, , [libopts], [$1])])
  LIBOPTS_BUILD_BLOCKED=true
  LIBOPTS_CHECK_COMMON(AO_Libopts_Dir)
  m4_popdef([AO_Libopts_Dir])dnl
# end of AC_DEFUN of LIBOPTS_CHECK_NOBUILD
])
dnl
AC_DEFUN([LIBOPTS_CHECK], [
  m4_pushdef([AO_Libopts_Dir],
	      [ifelse($1, , [libopts], [$1])])
  LIBOPTS_BUILD_BLOCKED=''
  LIBOPTS_CHECK_COMMON(AO_Libopts_Dir)
  AM_COND_IF([NEED_LIBOPTS], [
    INVOKE_LIBOPTS_MACROS
    AC_CONFIG_FILES(AO_Libopts_Dir/Makefile)
  ])dnl
  m4_popdef([AO_Libopts_Dir])dnl
# end of AC_DEFUN of LIBOPTS_CHECK
])