Merge ntpd & friends 4.2.4p5 from vendor/ntp/dist into head. Next commit

will update usr.sbin/ntp to match this.

MFC after:	2 weeks

2 files changed, 551 insertions, 0 deletions

diff --git a/contrib/ntp/libopts/m4/libopts.m4 b/contrib/ntp/libopts/m4/libopts.m4
new file mode 100644
index 0000000..adc3235
--- /dev/null
+++ b/contrib/ntp/libopts/m4/libopts.m4
@@ -0,0 +1,509 @@
+dnl  -*- buffer-read-only: t -*- vi: set ro:
+dnl 
+dnl DO NOT EDIT THIS FILE   (libopts.m4)
+dnl 
+dnl It has been AutoGen-ed  Saturday May  5, 2007 at 12:02:37 PM PDT
+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],[
+[if test X${INVOKE_LIBOPTS_MACROS_FIRST_done} != Xyes ; then]
+  # =================
+  # AC_HEADER_STDC
+  # =================
+  AC_HEADER_STDC
+  # =================
+  # AC_HEADER_DIRENT
+  # =================
+  AC_HEADER_DIRENT
+  
+  # =================
+  # AC_CHECK_HEADERS
+  # =================
+  AC_CHECK_HEADERS(dlfcn.h errno.h fcntl.h libgen.h memory.h netinet/in.h \
+    setjmp.h sys/mman.h sys/param.h sys/poll.h sys/procset.h sys/select.h \
+    sys/socket.h sys/stropts.h sys/time.h sys/un.h sys/wait.h unistd.h    \
+    utime.h sysexits.h)
+  
+  # --------------------------------------------
+  # Verify certain entries from AC_CHECK_HEADERS
+  # --------------------------------------------
+  [for f in sys_types sys_mman sys_param sys_stat sys_wait \
+           string errno stdlib memory setjmp
+  do eval as_ac_var=\${ac_cv_header_${f}_h+set}
+     test "${as_ac_var}" = set] || \
+       AC_MSG_ERROR([You must have ${f}.h on your system])
+  done
+  
+  # ================================================
+  # AC_CHECK_HEADERS: stdarg.h is present define HAVE_STDARG_H, otherwise
+  # if varargs.h is present define HAVE_VARARGS_H.
+  # ================================================
+  AC_CHECK_HEADERS(stdarg.h varargs.h, break)
+  [if test `eval echo '${'$as_ac_Header'}'` != yes; then]
+    AC_MSG_ERROR([You must have stdarg.h or varargs.h on your system])
+  fi
+  
+  # ================================================
+  # Similarly for the string.h and strings.h headers
+  # ================================================
+  AC_CHECK_HEADERS(string.h strings.h, break)
+  [if test `eval echo '${'$as_ac_Header'}'` != yes; then]
+    AC_MSG_ERROR([You must have string.h or strings.h on your system])
+  fi
+  
+  # =====================
+  # ...and limits headers
+  # =====================
+  AC_CHECK_HEADERS(limits.h sys/limits.h values.h, break)
+  [if test `eval echo '${'$as_ac_Header'}'` != yes; then]
+    AC_MSG_ERROR([You must have one of limits.h, sys/limits.h or values.h])
+  fi
+  
+  # ========================
+  # ...and int types headers
+  # ========================
+  AC_CHECK_HEADERS(stdint.h inttypes.h, break)
+  AC_CHECK_TYPES([int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t,
+     intptr_t, uint_t])
+  
+  # ====================
+  # uintptr type & sizes
+  # ====================
+  AC_CHECK_TYPES([uintptr_t], ,
+         [AC_DEFINE([uintptr_t], unsigned long,
+                    [Alternate uintptr_t for systems without it.])])
+  AC_CHECK_SIZEOF(char*, 4)
+  AC_CHECK_SIZEOF(int,   4)
+  AC_CHECK_SIZEOF(long,  4)
+  AC_CHECK_SIZEOF(short, 2)
+  
+  # ----------------------------------------------------------------------
+  # AC_CHECK_LIB for SVR4 libgen, and use it if it defines pathfind.
+  # ----------------------------------------------------------------------
+  AC_CHECK_LIB(gen, pathfind)
+  AC_FUNC_VPRINTF
+  AC_CHECK_FUNCS([mmap canonicalize_file_name snprintf strdup strchr strrchr])
+[  INVOKE_LIBOPTS_MACROS_FIRST_done=yes
+fi]])
+
+dnl
+dnl @synopsis  INVOKE_LIBOPTS_MACROS
+dnl
+dnl  This macro will invoke the AutoConf macros specified in libopts.def
+dnl  that have not been disabled with "omit-invocation".
+dnl
+AC_DEFUN([LIBOPTS_WITH_REGEX_HEADER],[
+  AC_ARG_WITH([regex-header],
+    AC_HELP_STRING([--with-regex-header], [a reg expr header is specified]),
+    [libopts_cv_with_regex_header=${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],
+    AC_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_libguile+set}" = set && \
+     test "${withval}" = no
+  then ## disabled by request
+    libopts_cv_with_libregex_root=no
+    libopts_cv_with_libregex_cflags=no
+    libopts_cv_with_libregex_libs=no
+  else
+
+  AC_ARG_WITH([libregex-cflags],
+    AC_HELP_STRING([--with-libregex-cflags], [libregex compile flags]),
+    [libopts_cv_with_libregex_cflags=${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],
+    AC_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 $? -ne 0
+    then libopts_cv_test_dev_zero=no
+    elif test -z "$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],
+    AC_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],[
+  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:        "2006-09-23 19:36:24 bkorb"
+dnl Last Committed:    $Date: 2006/09/24 02:59:00 $
+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 Default to system libopts
+dnl
+AC_DEFUN([LIBOPTS_CHECK],[
+  [NEED_LIBOPTS_DIR='']
+  m4_pushdef([AO_Libopts_Dir],
+	    [ifelse($1, , [libopts], [$1])])
+  AC_SUBST(LIBOPTS_DIR, AO_Libopts_Dir)
+  AC_ARG_ENABLE([local-libopts],
+    AC_HELP_STRING([--enable-local-libopts],
+       [Force using the supplied libopts tearoff code]),[
+    if test x$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 "${NEED_LIBOPTS_DIR}"]
+
+  AM_CONDITIONAL([NEED_LIBOPTS], [test -n "${NEED_LIBOPTS_DIR}"])
+  AC_SUBST(LIBOPTS_LDADD)
+  AC_SUBST(LIBOPTS_CFLAGS)
+  AC_SUBST(LIBOPTS_DIR, AO_Libopts_Dir)
+  AC_CONFIG_FILES(AO_Libopts_Dir/Makefile)
+  m4_popdef([AO_Libopts_Dir])
+
+  [if test -n "${NEED_LIBOPTS_DIR}" ; then]
+    INVOKE_LIBOPTS_MACROS
+  else
+    INVOKE_LIBOPTS_MACROS_FIRST
+  [fi
+# end of AC_DEFUN of LIBOPTS_CHECK]
+])
diff --git a/contrib/ntp/libopts/m4/liboptschk.m4 b/contrib/ntp/libopts/m4/liboptschk.m4
new file mode 100644
index 0000000..14e7f27
--- /dev/null
+++ b/contrib/ntp/libopts/m4/liboptschk.m4
@@ -0,0 +1,42 @@
+# liboptschk.m4 serial 1 (autogen - 5.7.3)
+dnl Copyright (C) 2005 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Time-stamp:        "2006-09-23 19:42:31 bkorb"
+dnl Last Committed:    $Date: 2006/09/24 02:59:00 $
+
+dnl This file can can be used in projects which are not available under
+dnl the GNU General Public License or the GNU Library General Public
+dnl License but which still want to provide support for the GNU gettext
+dnl functionality.
+dnl Please note that the actual code of the GNU gettext library is covered
+dnl by the GNU Library General Public License, and the rest of the GNU
+dnl gettext package package is covered by the GNU General Public License.
+dnl They are *not* in the public domain.
+
+dnl Authors:
+dnl   Ulrich Drepper <drepper@cygnus.com>, 1995-2000.
+dnl   Bruno Haible <haible@clisp.cons.org>, 2000-2003.
+
+AC_PREREQ(2.50)
+
+AC_DEFUN([ag_FIND_LIBOPTS],
+    [if test "X${ac_cv_header_autoopts_options_h}" == Xno
+    then
+      :
+    else
+      f=`autoopts-config cflags` 2>/dev/null
+      test X"${f}" = X && f=`libopts-config cflags` 2>/dev/null
+      if test X"${f}" = X
+      then
+        :
+      else
+        AC_DEFINE([HAVE_LIBOPTS],[1],[define if we can find libopts])
+        CFLAGS="${CFLAGS} ${f}"
+        f=`autoopts-config ldflags` 2>/dev/null
+        test X"${f}" = X && f=`libopts-config ldflags` 2>/dev/null
+        LIBS="${LIBS} ${f}"
+      fi
+    fi])