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 12AC_CACHE_CHECK(for tzname, ac_cv_var_tzname, 13[AC_TRY_LINK( 14changequote(<<, >>)dnl 15<<#include <time.h> 16#ifndef tzname /* For SGI. */ 17extern char *tzname[]; /* RS6000 and others reject char **tzname. */ 18#endif>>, 19changequote([, ])dnl 20[atoi(*tzname);], ac_cv_var_tzname=yes, ac_cv_var_tzname=no)]) 21 if test $ac_cv_var_tzname = yes; then 22 AC_DEFINE(HAVE_TZNAME,1,[HAVE_TZNAME]) 23 fi 24 25AC_CACHE_CHECK([for tm_isdst in struct tm], ac_cv_struct_tm_isdst, 26[AC_TRY_COMPILE([#include <sys/types.h> 27#include <$ac_cv_struct_tm>], [struct tm tm; tm.tm_isdst;], 28 ac_cv_struct_tm_isdst=yes, ac_cv_struct_tm_isdst=no)]) 29if test "$ac_cv_struct_tm_isdst" = yes; then 30 AC_DEFINE(HAVE_TM_ISDST,1,[HAVE_TM_ISDST]) 31fi 32AC_CACHE_CHECK(for daylight, ac_cv_var_daylight, 33[AC_TRY_LINK( 34changequote(<<, >>)dnl 35<<#include <time.h> 36#ifndef daylight /* In case IRIX #defines this, too */ 37extern int daylight; 38#endif>>, 39changequote([, ])dnl 40[atoi(daylight);], ac_cv_var_daylight=yes, ac_cv_var_daylight=no)]) 41 if test $ac_cv_var_daylight = yes; then 42 AC_DEFINE(HAVE_DAYLIGHT,1,[HAVE_DAYLIGHT]) 43 fi 44]) 45