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Revision 2 - (show annotations) (download)
Fri Oct 28 21:19:04 2011 UTC (12 years, 5 months ago) by zoff99
File size: 1058 byte(s)
import files
1 # ulonglong.m4 serial 3
2 dnl Copyright (C) 1999-2003 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.
8
9 dnl From Paul Eggert.
10
11 # Define HAVE_UNSIGNED_LONG_LONG if 'unsigned long long' works.
12
13 AC_DEFUN([jm_AC_TYPE_UNSIGNED_LONG_LONG],
14 [
15 AC_CACHE_CHECK([for unsigned long long], ac_cv_type_unsigned_long_long,
16 [AC_TRY_LINK([unsigned long long ull = 1ULL; int i = 63;],
17 [unsigned long long ullmax = (unsigned long long) -1;
18 return ull << i | ull >> i | ullmax / ull | ullmax % ull;],
19 ac_cv_type_unsigned_long_long=yes,
20 ac_cv_type_unsigned_long_long=no)])
21 if test $ac_cv_type_unsigned_long_long = yes; then
22 AC_DEFINE(HAVE_UNSIGNED_LONG_LONG, 1,
23 [Define if you have the 'unsigned long long' type.])
24 fi
25 ])

   
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