2 dnl Copyright (C) 1999-2004, 2009, 2010 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
9 # Define HAVE_LONG_LONG if 'long long' works.
11 AC_DEFUN([gl_AC_TYPE_LONG_LONG],
13 AC_CACHE_CHECK([for long long], ac_cv_type_long_long,
14 [AC_TRY_LINK([long long ll = 1LL; int i = 63;],
15 [long long llmax = (long long) -1;
16 return ll << i | ll >> i | llmax / ll | llmax % ll;],
17 ac_cv_type_long_long=yes,
18 ac_cv_type_long_long=no)])
19 if test $ac_cv_type_long_long = yes; then
20 AC_DEFINE(HAVE_LONG_LONG, 1,
21 [Define if you have the 'long long' type.])