libopts.m4

基于ntp协议的网络时间服务程序

    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]
])