1# longlong.m4 serial 8
2dnl Copyright (C) 1999-2006 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Paul Eggert.
8
9# Define HAVE_LONG_LONG_INT if 'long long int' works.
10# This fixes a bug in Autoconf 2.60, but can be removed once we
11# assume 2.61 everywhere.
12
13# Note: If the type 'long long int' exists but is only 32 bits large
14# (as on some very old compilers), AC_TYPE_LONG_LONG_INT will not be
15# defined. In this case you can treat 'long long int' like 'long int'.
16
17AC_DEFUN([AC_TYPE_LONG_LONG_INT],
18[
19  AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int],
20    [AC_LINK_IFELSE(
21       [AC_LANG_PROGRAM(
22	  [[long long int ll = 9223372036854775807ll;
23	    long long int nll = -9223372036854775807LL;
24	    typedef int a[((-9223372036854775807LL < 0
25			    && 0 < 9223372036854775807ll)
26			   ? 1 : -1)];
27	    int i = 63;]],
28	  [[long long int llmax = 9223372036854775807ll;
29	    return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i)
30		    | (llmax / ll) | (llmax % ll));]])],
31       [ac_cv_type_long_long_int=yes],
32       [ac_cv_type_long_long_int=no])])
33  if test $ac_cv_type_long_long_int = yes; then
34    AC_DEFINE([HAVE_LONG_LONG_INT], 1,
35      [Define to 1 if the system has the type `long long int'.])
36  fi
37])
38
39# This macro is obsolescent and should go away soon.
40AC_DEFUN([gl_AC_TYPE_LONG_LONG],
41[
42  AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
43  ac_cv_type_long_long=$ac_cv_type_long_long_int
44  if test $ac_cv_type_long_long = yes; then
45    AC_DEFINE(HAVE_LONG_LONG, 1,
46      [Define if you have the 'long long' type.])
47  fi
48])
49