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+dnl This file is part of GNU mailutils.
+dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.
+dnl
+dnl GNU Mailutils is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl
+dnl GNU Mailutils is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License along
+dnl with GNU Mailutils; if not, write to the Free Software Foundation,
+dnl Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+dnl
+
+AH_TEMPLATE(BDB2_CURSOR_LASTARG,
+ [Last argument to the cursor member of Berkeley 2 DB structure])
+
+dnl The cursor member of DB structure used to take three arguments in older
+dnl implementations of Berkeley DB. Newer versions (>= 4.0) declare
+dnl it as taking four arguments.
+dnl This macro checks which of the variants we have.
+AC_DEFUN([MU_DB2_CURSOR],
+ [AC_CACHE_CHECK([whether db->cursor takes 4 arguments],
+ [mu_cv_bdb2_cursor_four_args],
+ [AC_TRY_COMPILE([#include <db.h>],
+ [
+DB *db;
+db->cursor(NULL, NULL, NULL, 0)
+ ],
+ [mu_cv_bdb2_cursor_four_args=yes],
+ [mu_cv_bdb2_cursor_four_args=no])])
+ if test $mu_cv_bdb2_cursor_four_args = yes; then
+ AC_DEFINE(BDB2_CURSOR_LASTARG,[,0])
+ else
+ AC_DEFINE(BDB2_CURSOR_LASTARG,[])
+ fi])
+
+

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