blob: d7d7350b3f53bc18f92ee82cb501a8819e0c28d0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
# longlong.m4 serial 4
dnl Copyright (C) 1999-2003 Free Software Foundation, Inc.
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License. As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
dnl that contains a configuration script generated by Autoconf, under
dnl the same distribution terms as the rest of that program.
dnl From Paul Eggert.
# Define HAVE_LONG_LONG if 'long long' works.
AC_DEFUN([jm_AC_TYPE_LONG_LONG],
[
AC_CACHE_CHECK([for long long], ac_cv_type_long_long,
[AC_TRY_LINK([long long ll = 1LL; int i = 63;],
[long long llmax = (long long) -1;
return ll << i | ll >> i | llmax / ll | llmax % ll;],
ac_cv_type_long_long=yes,
ac_cv_type_long_long=no)])
if test $ac_cv_type_long_long = yes; then
AC_DEFINE(HAVE_LONG_LONG, 1,
[Define if you have the 'long long' type.])
fi
])
|
