root/m4/longlong.m4

Revision 7bbc2548f92696457164ebf7f4f86dc815ef80c7, 4.0 kB (checked in by Rémi Denis-Courmont <rem@videolan.org>, 3 months ago)

Switch to gettext 0.17

The whole point of keeping the m4 and po/Makefile.in.in is to not need
to have the same version all over the place anyway, otherwise we might
as well put all these files to .gitignore...

Remove some old m4 macros as well.

  • Property mode set to 100644
Line 
1 # longlong.m4 serial 13
2 dnl Copyright (C) 1999-2007 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.
6
7 dnl From Paul Eggert.
8
9 # Define HAVE_LONG_LONG_INT if 'long long int' works.
10 # This fixes a bug in Autoconf 2.61, but can be removed once we
11 # assume 2.62 everywhere.
12
13 # Note: If the type 'long long int' exists but is only 32 bits large
14 # (as on some very old compilers), HAVE_LONG_LONG_INT will not be
15 # defined. In this case you can treat 'long long int' like 'long int'.
16
17 AC_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_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.
25         AC_RUN_IFELSE(
26           [AC_LANG_PROGRAM(
27              [[@%:@include <limits.h>
28                @%:@ifndef LLONG_MAX
29                @%:@ define HALF \
30                         (1LL << (sizeof (long long int) * CHAR_BIT - 2))
31                @%:@ define LLONG_MAX (HALF - 1 + HALF)
32                @%:@endif]],
33              [[long long int n = 1;
34                int i;
35                for (i = 0; ; i++)
36                  {
37                    long long int m = n << i;
38                    if (m >> i != n)
39                      return 1;
40                    if (LLONG_MAX / 2 < m)
41                      break;
42                  }
43                return 0;]])],
44           [ac_cv_type_long_long_int=yes],
45           [ac_cv_type_long_long_int=no],
46           [ac_cv_type_long_long_int=yes])],
47        [ac_cv_type_long_long_int=no])])
48   if test $ac_cv_type_long_long_int = yes; then
49     AC_DEFINE([HAVE_LONG_LONG_INT], 1,
50       [Define to 1 if the system has the type `long long int'.])
51   fi
52 ])
53
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.
57
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'.
62
63 AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT],
64 [
65   AC_CACHE_CHECK([for unsigned long long int],
66     [ac_cv_type_unsigned_long_long_int],
67     [AC_LINK_IFELSE(
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'.])
74   fi
75 ])
76
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],
83 [
84   AC_LANG_PROGRAM(
85     [[/* Test preprocessor.  */
86       #if ! (-9223372036854775807LL < 0 && 0 < 9223372036854775807ll)
87         error in preprocessor;
88       #endif
89       #if ! (18446744073709551615ULL <= -1ull)
90         error in preprocessor;
91       #endif
92       /* Test literals.  */
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)
98                      ? 1 : -1)];
99       typedef int b[(18446744073709551615ULL <= (unsigned long long int) -1
100                      ? 1 : -1)];
101       int i = 63;]],
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));]])
109 ])
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