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1 # longlong.m4 serial 14 | 1 # longlong.m4 serial 17 |
2 dnl Copyright (C) 1999-2007, 2009-2011 Free Software Foundation, Inc. | 2 dnl Copyright (C) 1999-2007, 2009-2012 Free Software Foundation, Inc. |
3 dnl This file is free software; the Free Software Foundation | 3 dnl This file is free software; the Free Software Foundation |
4 dnl gives unlimited permission to copy and/or distribute it, | 4 dnl gives unlimited permission to copy and/or distribute it, |
5 dnl with or without modifications, as long as this notice is preserved. | 5 dnl with or without modifications, as long as this notice is preserved. |
6 | 6 |
7 dnl From Paul Eggert. | 7 dnl From Paul Eggert. |
8 | 8 |
9 # Define HAVE_LONG_LONG_INT if 'long long int' works. | 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 | 10 # This fixes a bug in Autoconf 2.61, and can be faster |
11 # assume 2.62 everywhere. | 11 # than what's in Autoconf 2.62 through 2.68. |
12 | 12 |
13 # Note: If the type 'long long int' exists but is only 32 bits large | 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 | 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'. | 15 # defined. In this case you can treat 'long long int' like 'long int'. |
16 | 16 |
17 AC_DEFUN([AC_TYPE_LONG_LONG_INT], | 17 AC_DEFUN([AC_TYPE_LONG_LONG_INT], |
18 [ | 18 [ |
| 19 AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT]) |
19 AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int], | 20 AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int], |
20 [AC_LINK_IFELSE( | 21 [ac_cv_type_long_long_int=yes |
21 [_AC_TYPE_LONG_LONG_SNIPPET], | 22 if test "x${ac_cv_prog_cc_c99-no}" = xno; then |
22 [dnl This catches a bug in Tandem NonStop Kernel (OSS) cc -O circa 2004. | 23 ac_cv_type_long_long_int=$ac_cv_type_unsigned_long_long_int |
23 dnl If cross compiling, assume the bug isn't important, since | 24 if test $ac_cv_type_long_long_int = yes; then |
24 dnl nobody cross compiles for this platform as far as we know. | 25 dnl Catch a bug in Tandem NonStop Kernel (OSS) cc -O circa 2004. |
25 AC_RUN_IFELSE( | 26 dnl If cross compiling, assume the bug is not important, since |
26 [AC_LANG_PROGRAM( | 27 dnl nobody cross compiles for this platform as far as we know. |
27 [[@%:@include <limits.h> | 28 AC_RUN_IFELSE( |
28 @%:@ifndef LLONG_MAX | 29 [AC_LANG_PROGRAM( |
29 @%:@ define HALF \ | 30 [[@%:@include <limits.h> |
30 (1LL << (sizeof (long long int) * CHAR_BIT - 2)) | 31 @%:@ifndef LLONG_MAX |
31 @%:@ define LLONG_MAX (HALF - 1 + HALF) | 32 @%:@ define HALF \ |
32 @%:@endif]], | 33 (1LL << (sizeof (long long int) * CHAR_BIT - 2)) |
33 [[long long int n = 1; | 34 @%:@ define LLONG_MAX (HALF - 1 + HALF) |
34 int i; | 35 @%:@endif]], |
35 for (i = 0; ; i++) | 36 [[long long int n = 1; |
36 { | 37 int i; |
37 long long int m = n << i; | 38 for (i = 0; ; i++) |
38 if (m >> i != n) | 39 { |
39 return 1; | 40 long long int m = n << i; |
40 if (LLONG_MAX / 2 < m) | 41 if (m >> i != n) |
41 break; | 42 return 1; |
42 } | 43 if (LLONG_MAX / 2 < m) |
43 return 0;]])], | 44 break; |
44 [ac_cv_type_long_long_int=yes], | 45 } |
45 [ac_cv_type_long_long_int=no], | 46 return 0;]])], |
46 [ac_cv_type_long_long_int=yes])], | 47 [], |
47 [ac_cv_type_long_long_int=no])]) | 48 [ac_cv_type_long_long_int=no], |
| 49 [:]) |
| 50 fi |
| 51 fi]) |
48 if test $ac_cv_type_long_long_int = yes; then | 52 if test $ac_cv_type_long_long_int = yes; then |
49 AC_DEFINE([HAVE_LONG_LONG_INT], [1], | 53 AC_DEFINE([HAVE_LONG_LONG_INT], [1], |
50 [Define to 1 if the system has the type `long long int'.]) | 54 [Define to 1 if the system has the type 'long long int'.]) |
51 fi | 55 fi |
52 ]) | 56 ]) |
53 | 57 |
54 # Define HAVE_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works. | 58 # Define HAVE_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works. |
55 # This fixes a bug in Autoconf 2.61, but can be removed once we | 59 # This fixes a bug in Autoconf 2.61, and can be faster |
56 # assume 2.62 everywhere. | 60 # than what's in Autoconf 2.62 through 2.68. |
57 | 61 |
58 # Note: If the type 'unsigned long long int' exists but is only 32 bits | 62 # Note: If the type 'unsigned long long int' exists but is only 32 bits |
59 # large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT | 63 # large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT |
60 # will not be defined. In this case you can treat 'unsigned long long int' | 64 # will not be defined. In this case you can treat 'unsigned long long int' |
61 # like 'unsigned long int'. | 65 # like 'unsigned long int'. |
62 | 66 |
63 AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT], | 67 AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT], |
64 [ | 68 [ |
65 AC_CACHE_CHECK([for unsigned long long int], | 69 AC_CACHE_CHECK([for unsigned long long int], |
66 [ac_cv_type_unsigned_long_long_int], | 70 [ac_cv_type_unsigned_long_long_int], |
67 [AC_LINK_IFELSE( | 71 [ac_cv_type_unsigned_long_long_int=yes |
68 [_AC_TYPE_LONG_LONG_SNIPPET], | 72 if test "x${ac_cv_prog_cc_c99-no}" = xno; then |
69 [ac_cv_type_unsigned_long_long_int=yes], | 73 AC_LINK_IFELSE( |
70 [ac_cv_type_unsigned_long_long_int=no])]) | 74 [_AC_TYPE_LONG_LONG_SNIPPET], |
| 75 [], |
| 76 [ac_cv_type_unsigned_long_long_int=no]) |
| 77 fi]) |
71 if test $ac_cv_type_unsigned_long_long_int = yes; then | 78 if test $ac_cv_type_unsigned_long_long_int = yes; then |
72 AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], [1], | 79 AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], [1], |
73 [Define to 1 if the system has the type `unsigned long long int'.]) | 80 [Define to 1 if the system has the type 'unsigned long long int'.]) |
74 fi | 81 fi |
75 ]) | 82 ]) |
76 | 83 |
77 # Expands to a C program that can be used to test for simultaneous support | 84 # 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 | 85 # 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, | 86 # '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 | 87 # because too many programs rely on the symmetry between signed and unsigned |
81 # integer types (excluding 'bool'). | 88 # integer types (excluding 'bool'). |
82 AC_DEFUN([_AC_TYPE_LONG_LONG_SNIPPET], | 89 AC_DEFUN([_AC_TYPE_LONG_LONG_SNIPPET], |
83 [ | 90 [ |
(...skipping 13 matching lines...) Expand all Loading... |
97 ? 1 : -1)]; | 104 ? 1 : -1)]; |
98 int i = 63;]], | 105 int i = 63;]], |
99 [[/* Test availability of runtime routines for shift and division. */ | 106 [[/* Test availability of runtime routines for shift and division. */ |
100 long long int llmax = 9223372036854775807ll; | 107 long long int llmax = 9223372036854775807ll; |
101 unsigned long long int ullmax = 18446744073709551615ull; | 108 unsigned long long int ullmax = 18446744073709551615ull; |
102 return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i) | 109 return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i) |
103 | (llmax / ll) | (llmax % ll) | 110 | (llmax / ll) | (llmax % ll) |
104 | (ull << 63) | (ull >> 63) | (ull << i) | (ull >> i) | 111 | (ull << 63) | (ull >> 63) | (ull << i) | (ull >> i) |
105 | (ullmax / ull) | (ullmax % ull));]]) | 112 | (ullmax / ull) | (ullmax % ull));]]) |
106 ]) | 113 ]) |
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