AC_DEFUN([AC_STRUCT_TIMEZONE_DAYLIGHT],
[AC_REQUIRE([AC_STRUCT_TM])AC_CACHE_CHECK([for tm_zone in struct tm], ac_cv_struct_tm_zone,
[AC_TRY_COMPILE([ ac_cv_struct_tm_zone=yes, ac_cv_struct_tm_zone=no)])
if test "$ac_cv_struct_tm_zone" = yes; then
AC_DEFINE(HAVE_TM_ZONE,1,[HAVE_TM_ZONE])
fi
AC_CACHE_CHECK(for tzname, ac_cv_var_tzname,
[AC_TRY_LINK(
changequote(<<, >>)<<extern char *tzname[]; /* RS6000 and others reject char **tzname. */
changequote([, ])[atoi(*tzname);], ac_cv_var_tzname=yes, ac_cv_var_tzname=no)])
if test $ac_cv_var_tzname = yes; then
AC_DEFINE(HAVE_TZNAME,1,[HAVE_TZNAME])
fi
AC_CACHE_CHECK([for tm_isdst in struct tm], ac_cv_struct_tm_isdst,
[AC_TRY_COMPILE([ ac_cv_struct_tm_isdst=yes, ac_cv_struct_tm_isdst=no)])
if test "$ac_cv_struct_tm_isdst" = yes; then
AC_DEFINE(HAVE_TM_ISDST,1,[HAVE_TM_ISDST])
fi
AC_CACHE_CHECK(for daylight, ac_cv_var_daylight,
[AC_TRY_LINK(
changequote(<<, >>)<<extern int daylight;
changequote([, ])[atoi(daylight);], ac_cv_var_daylight=yes, ac_cv_var_daylight=no)])
if test $ac_cv_var_daylight = yes; then
AC_DEFINE(HAVE_DAYLIGHT,1,[HAVE_DAYLIGHT])
fi
])
AC_DEFUN([AC_STRUCT_OPTION_GETOPT_H],
[AC_CACHE_CHECK([for struct option in getopt], ac_cv_struct_option_getopt_h,
[AC_TRY_COMPILE([ ac_cv_struct_option_getopt_h=yes, ac_cv_struct_option_getopt_h=no)])
if test "$ac_cv_struct_option_getopt_h" = yes; then
AC_DEFINE(HAVE_STRUCT_OPTION,1,[HAVE_STRUCT_OPTION])
fi
])