diff options
Diffstat (limited to 'm4/ac_var_timezone_externals.m4')
| -rw-r--r-- | m4/ac_var_timezone_externals.m4 | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/m4/ac_var_timezone_externals.m4 b/m4/ac_var_timezone_externals.m4 new file mode 100644 index 0000000..247cf3d --- /dev/null +++ b/m4/ac_var_timezone_externals.m4 @@ -0,0 +1,76 @@ +# =========================================================================== +# http://autoconf-archive.cryp.to/ac_var_timezone_externals.html +# =========================================================================== +# +# SYNOPSIS +# +# AC_VAR_TIMEZONE_EXTERNALS +# +# DESCRIPTION +# +# 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'). +# +# LICENSE +# +# Copyright (c) 2008 Mark R. Bannister +# +# 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; either version 2 of the License, or (at your +# option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +# Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program. If not, see <http://www.gnu.org/licenses/>. +# +# 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, even though portions of the text of the +# Macro appear in them. The GNU General Public License (GPL) does govern +# all other use of the material that constitutes the Autoconf Macro. +# +# This special exception to the GPL applies to versions of the Autoconf +# Macro released by the Autoconf Archive. When you make and distribute a +# modified version of the Autoconf Macro, you may extend this special +# exception to the GPL to apply to your modified version as well. + +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 +]) |