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      1 dnl from autoconf 2.13 acspecific.m4, with changes to check for daylight
      2 
      3 AC_DEFUN([AC_STRUCT_TIMEZONE_DAYLIGHT],
      4 [AC_REQUIRE([AC_STRUCT_TM])dnl
      5 AC_CACHE_CHECK([for tm_zone in struct tm], ac_cv_struct_tm_zone,
      6 [AC_COMPILE_IFELSE(
      7 [AC_LANG_PROGRAM([#include <sys/types.h>
      8 #include <$ac_cv_struct_tm>], [struct tm tm; tm.tm_zone;])],
      9   ac_cv_struct_tm_zone=yes, ac_cv_struct_tm_zone=no)])
     10 if test "$ac_cv_struct_tm_zone" = yes; then
     11   AC_DEFINE(HAVE_TM_ZONE,1,[HAVE_TM_ZONE])
     12 fi
     13 
     14 # On SGI, apparently tzname is a #define, but that's ok, AC_CHECK_DECL will
     15 # consider it declared and we won't give our own extern.
     16 AC_CHECK_DECLS([tzname], , , [#include <time.h>])
     17 AC_CACHE_CHECK(for tzname, ac_cv_var_tzname,
     18 [AC_LINK_IFELSE(
     19 [AC_LANG_PROGRAM([#include <time.h>],
     20 [[#if !HAVE_DECL_TZNAME
     21 extern char *tzname[];
     22 #endif
     23 return tzname[0][0];]])], [ac_cv_var_tzname=yes], [ac_cv_var_tzname=no])])
     24   if test $ac_cv_var_tzname = yes; then
     25     AC_DEFINE(HAVE_TZNAME,1,[HAVE_TZNAME])
     26   fi
     27 
     28 AC_CACHE_CHECK([for tm_isdst in struct tm], ac_cv_struct_tm_isdst,
     29 [AC_COMPILE_IFELSE(
     30 [AC_LANG_PROGRAM([#include <sys/types.h>
     31 #include <$ac_cv_struct_tm>], [struct tm tm; tm.tm_isdst;])],
     32   ac_cv_struct_tm_isdst=yes, ac_cv_struct_tm_isdst=no)])
     33 if test "$ac_cv_struct_tm_isdst" = yes; then
     34   AC_DEFINE(HAVE_TM_ISDST,1,[HAVE_TM_ISDST])
     35 fi
     36 
     37 
     38 AC_CHECK_DECLS([daylight], , , [#include <time.h>
     39 #include <stdlib.h>])
     40 AC_CACHE_CHECK(for daylight, ac_cv_var_daylight,
     41 [AC_LINK_IFELSE(
     42 [AC_LANG_PROGRAM([#include <time.h>
     43 #include <stdlib.h>],
     44 [#if !HAVE_DECL_DAYLIGHT
     45 extern int daylight;
     46 #endif
     47 daylight = atoi("1");])], ac_cv_var_daylight=yes, ac_cv_var_daylight=no)])
     48   if test $ac_cv_var_daylight = yes; then
     49     AC_DEFINE(HAVE_DAYLIGHT,1,[HAVE_DAYLIGHT])
     50   fi
     51 ])
     52 
     53 AC_DEFUN([AC_STRUCT_OPTION_GETOPT_H],
     54 [AC_CACHE_CHECK([for struct option in getopt], ac_cv_struct_option_getopt_h,
     55 [AC_COMPILE_IFELSE(
     56 [AC_LANG_PROGRAM([#include <getopt.h>], [struct option op; op.name;])],
     57   ac_cv_struct_option_getopt_h=yes, ac_cv_struct_option_getopt_h=no)])
     58 if test "$ac_cv_struct_option_getopt_h" = yes; then
     59   AC_DEFINE(HAVE_STRUCT_OPTION,1,[HAVE_STRUCT_OPTION])
     60 fi
     61 ])
     62