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