7
7
dnl From Paul Eggert.
9
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.
10
# This fixes a bug in Autoconf 2.61, but can be removed once we
11
# assume 2.62 everywhere.
13
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
14
# (as on some very old compilers), HAVE_LONG_LONG_INT will not be
15
15
# defined. In this case you can treat 'long long int' like 'long int'.
17
17
AC_DEFUN([AC_TYPE_LONG_LONG_INT],
19
19
AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int],
22
[[long long int ll = 9223372036854775807ll;
23
long long int nll = -9223372036854775807LL;
24
typedef int a[((-9223372036854775807LL < 0
25
&& 0 < 9223372036854775807ll)
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],
21
[_AC_TYPE_LONG_LONG_SNIPPET],
22
[dnl This catches a bug in Tandem NonStop Kernel (OSS) cc -O circa 2004.
23
dnl If cross compiling, assume the bug isn't important, since
24
dnl nobody cross compiles for this platform as far as we know.
27
[[@%:@include <limits.h>
30
(1LL << (sizeof (long long int) * CHAR_BIT - 2))
31
@%:@ define LLONG_MAX (HALF - 1 + HALF)
33
[[long long int n = 1;
37
long long int m = n << i;
40
if (LLONG_MAX / 2 < m)
44
[ac_cv_type_long_long_int=yes],
45
[ac_cv_type_long_long_int=no],
46
[ac_cv_type_long_long_int=yes])],
32
47
[ac_cv_type_long_long_int=no])])
33
48
if test $ac_cv_type_long_long_int = yes; then
34
49
AC_DEFINE([HAVE_LONG_LONG_INT], 1,
39
# This macro is obsolescent and should go away soon.
40
AC_DEFUN([gl_AC_TYPE_LONG_LONG],
54
# Define HAVE_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works.
55
# This fixes a bug in Autoconf 2.61, but can be removed once we
56
# assume 2.62 everywhere.
58
# Note: If the type 'unsigned long long int' exists but is only 32 bits
59
# large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT
60
# will not be defined. In this case you can treat 'unsigned long long int'
61
# like 'unsigned long int'.
63
AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT],
42
AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
43
ac_cv_type_long_long=$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.])
65
AC_CACHE_CHECK([for unsigned long long int],
66
[ac_cv_type_unsigned_long_long_int],
68
[_AC_TYPE_LONG_LONG_SNIPPET],
69
[ac_cv_type_unsigned_long_long_int=yes],
70
[ac_cv_type_unsigned_long_long_int=no])])
71
if test $ac_cv_type_unsigned_long_long_int = yes; then
72
AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1,
73
[Define to 1 if the system has the type `unsigned long long int'.])
77
# Expands to a C program that can be used to test for simultaneous support
78
# of 'long long' and 'unsigned long long'. We don't want to say that
79
# 'long long' is available if 'unsigned long long' is not, or vice versa,
80
# because too many programs rely on the symmetry between signed and unsigned
81
# integer types (excluding 'bool').
82
AC_DEFUN([_AC_TYPE_LONG_LONG_SNIPPET],
85
[[/* Test preprocessor. */
86
#if ! (-9223372036854775807LL < 0 && 0 < 9223372036854775807ll)
87
error in preprocessor;
89
#if ! (18446744073709551615ULL <= -1ull)
90
error in preprocessor;
93
long long int ll = 9223372036854775807ll;
94
long long int nll = -9223372036854775807LL;
95
unsigned long long int ull = 18446744073709551615ULL;
96
/* Test constant expressions. */
97
typedef int a[((-9223372036854775807LL < 0 && 0 < 9223372036854775807ll)
99
typedef int b[(18446744073709551615ULL <= (unsigned long long int) -1
102
[[/* Test availability of runtime routines for shift and division. */
103
long long int llmax = 9223372036854775807ll;
104
unsigned long long int ullmax = 18446744073709551615ull;
105
return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i)
106
| (llmax / ll) | (llmax % ll)
107
| (ull << 63) | (ull >> 63) | (ull << i) | (ull >> i)
108
| (ullmax / ull) | (ullmax % ull));]])