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dnl ac_var_timeszone_externals.m4 |
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# Define 'timezone', 'altzone' and 'daylight' |
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# http://www.gnu.org/software/ac-archive/Miscellaneous/ac_var_timezone_externals.html |
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# Use instead of 'AC_STRUCT_TIMEZONE' to determine whether the |
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# the external timezone variables 'timezone', 'altzone' and 'daylight' exist, |
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# defining 'HAVE_TIMEZONE', 'HAVE_ALTZONE' and 'HAVE_DAYLIGHT' respectively |
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# (as well as gaining the macros defined by 'AC_STRUCT_TIMEZONE'). |
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# Mark R.Bannister <markb@freedomware.co.uk> |
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AC_DEFUN([AC_VAR_TIMEZONE_EXTERNALS], |
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[ AC_REQUIRE([AC_STRUCT_TIMEZONE])dnl |
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AC_CACHE_CHECK(for timezone external, mb_cv_var_timezone, |
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[ AC_TRY_LINK([#include <time.h>], [return (int)timezone;], |
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mb_cv_var_timezone=yes, |
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mb_cv_var_timezone=no) |
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]) |
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AC_CACHE_CHECK(for altzone external, mb_cv_var_altzone, |
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[ AC_TRY_LINK([#include <time.h>], [return (int)altzone;], |
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mb_cv_var_altzone=yes, |
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mb_cv_var_altzone=no) |
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]) |
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AC_CACHE_CHECK(for daylight external, mb_cv_var_daylight, |
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[ AC_TRY_LINK([#include <time.h>], [return (int)daylight;], |
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mb_cv_var_daylight=yes, |
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mb_cv_var_daylight=no) |
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]) |
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if test $mb_cv_var_timezone = yes; then |
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AC_DEFINE([HAVE_TIMEZONE], 1, |
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[Define if you have the external 'timezone' variable.]) |
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fi |
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if test $mb_cv_var_altzone = yes; then |
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AC_DEFINE([HAVE_ALTZONE], 1, |
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[Define if you have the external 'altzone' variable.]) |
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fi |
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if test $mb_cv_var_daylight = yes; then |
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AC_DEFINE([HAVE_DAYLIGHT], 1, |
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[Define if you have the external 'daylight' variable.]) |
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fi |
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]) |