Download M4 Source | Macro Index Page |
AC_VAR_TIMEZONE_EXTERNALS
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').
Mark R.Bannister <markb@freedomware.co.uk>
2002-01-04
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 ])