| 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 | ])
|
|---|
