2 dnl Copyright (C) 1999-2004 Free Software Foundation, Inc.
3 dnl This file is free software, distributed under the terms of the GNU
4 dnl General Public License. As a special exception to the GNU General
5 dnl Public License, this file may be distributed as part of a program
6 dnl that contains a configuration script generated by Autoconf, under
7 dnl the same distribution terms as the rest of that program.
11 # Define HAVE_LONG_LONG if 'long long' works.
13 AC_DEFUN([gl_AC_TYPE_LONG_LONG],
15 AC_CACHE_CHECK([for long long], ac_cv_type_long_long,
16 [AC_TRY_LINK([long long ll = 1LL; int i = 63;],
17 [long long llmax = (long long) -1;
18 return ll << i | ll >> i | llmax / ll | llmax % ll;],
19 ac_cv_type_long_long=yes,
20 ac_cv_type_long_long=no)])
21 if test $ac_cv_type_long_long = yes; then
22 AC_DEFINE(HAVE_LONG_LONG, 1,
23 [Define if you have the 'long long' type.])