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