AC_VAR_TIMEZONE_EXTERNALS
, 

2002-01-04

Mark R.Bannister <markb@freedomware.co.uk>

GPLWithACException
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation. As a special exception, the respective Autoconf Macro's copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts

cryp.to ac-archive's Miscellaneous (released)

Use instead of `AC_STRUCT_TIMEZONE' to determine whether the the external timezone variables `timezone', `altzone' and `daylight' exist, defining `HAVE_TIMEZONE', `HAVE_ALTZONE' and `HAVE_DAYLIGHT' respectively (as well as gaining the macros defined by `AC_STRUCT_TIMEZONE').

AC_DEFUN([AC_VAR_TIMEZONE_EXTERNALS],
[  AC_REQUIRE([AC_STRUCT_TIMEZONE])dnl
   AC_CACHE_CHECK(for timezone external, mb_cv_var_timezone,
   [  AC_TRY_LINK([#include <time.h>], [return (int)timezone;],
         mb_cv_var_timezone=yes,
         mb_cv_var_timezone=no)
   ])
   AC_CACHE_CHECK(for altzone external, mb_cv_var_altzone,
   [  AC_TRY_LINK([#include <time.h>], [return (int)altzone;],
         mb_cv_var_altzone=yes,
         mb_cv_var_altzone=no)
   ])
   AC_CACHE_CHECK(for daylight external, mb_cv_var_daylight,
   [  AC_TRY_LINK([#include <time.h>], [return (int)daylight;],
         mb_cv_var_daylight=yes,
         mb_cv_var_daylight=no)
   ])
   if test $mb_cv_var_timezone = yes; then
      AC_DEFINE([HAVE_TIMEZONE], 1,
              [Define if you have the external `timezone' variable.])
   fi
   if test $mb_cv_var_altzone = yes; then
      AC_DEFINE([HAVE_ALTZONE], 1,
              [Define if you have the external `altzone' variable.])
   fi
   if test $mb_cv_var_daylight = yes; then
      AC_DEFINE([HAVE_DAYLIGHT], 1,
              [Define if you have the external `daylight' variable.])
   fi
])