| Index: bison/src/bison/2.4.1/bison-2.4.1-src/m4/longlong.m4
|
| ===================================================================
|
| --- bison/src/bison/2.4.1/bison-2.4.1-src/m4/longlong.m4 (revision 0)
|
| +++ bison/src/bison/2.4.1/bison-2.4.1-src/m4/longlong.m4 (revision 0)
|
| @@ -0,0 +1,106 @@
|
| +# longlong.m4 serial 13
|
| +dnl Copyright (C) 1999-2007 Free Software Foundation, Inc.
|
| +dnl This file is free software; the Free Software Foundation
|
| +dnl gives unlimited permission to copy and/or distribute it,
|
| +dnl with or without modifications, as long as this notice is preserved.
|
| +
|
| +dnl From Paul Eggert.
|
| +
|
| +# Define HAVE_LONG_LONG_INT if 'long long int' works.
|
| +# This fixes a bug in Autoconf 2.61, but can be removed once we
|
| +# assume 2.62 everywhere.
|
| +
|
| +# Note: If the type 'long long int' exists but is only 32 bits large
|
| +# (as on some very old compilers), HAVE_LONG_LONG_INT will not be
|
| +# defined. In this case you can treat 'long long int' like 'long int'.
|
| +
|
| +AC_DEFUN([AC_TYPE_LONG_LONG_INT],
|
| +[
|
| + AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int],
|
| + [AC_LINK_IFELSE(
|
| + [_AC_TYPE_LONG_LONG_SNIPPET],
|
| + [dnl This catches a bug in Tandem NonStop Kernel (OSS) cc -O circa 2004.
|
| + dnl If cross compiling, assume the bug isn't important, since
|
| + dnl nobody cross compiles for this platform as far as we know.
|
| + AC_RUN_IFELSE(
|
| + [AC_LANG_PROGRAM(
|
| + [[@%:@include <limits.h>
|
| + @%:@ifndef LLONG_MAX
|
| + @%:@ define HALF \
|
| + (1LL << (sizeof (long long int) * CHAR_BIT - 2))
|
| + @%:@ define LLONG_MAX (HALF - 1 + HALF)
|
| + @%:@endif]],
|
| + [[long long int n = 1;
|
| + int i;
|
| + for (i = 0; ; i++)
|
| + {
|
| + long long int m = n << i;
|
| + if (m >> i != n)
|
| + return 1;
|
| + if (LLONG_MAX / 2 < m)
|
| + break;
|
| + }
|
| + return 0;]])],
|
| + [ac_cv_type_long_long_int=yes],
|
| + [ac_cv_type_long_long_int=no],
|
| + [ac_cv_type_long_long_int=yes])],
|
| + [ac_cv_type_long_long_int=no])])
|
| + if test $ac_cv_type_long_long_int = yes; then
|
| + AC_DEFINE([HAVE_LONG_LONG_INT], 1,
|
| + [Define to 1 if the system has the type `long long int'.])
|
| + fi
|
| +])
|
| +
|
| +# Define HAVE_UNSIGNED_LONG_LONG_INT if 'unsigned long long int' works.
|
| +# This fixes a bug in Autoconf 2.61, but can be removed once we
|
| +# assume 2.62 everywhere.
|
| +
|
| +# Note: If the type 'unsigned long long int' exists but is only 32 bits
|
| +# large (as on some very old compilers), AC_TYPE_UNSIGNED_LONG_LONG_INT
|
| +# will not be defined. In this case you can treat 'unsigned long long int'
|
| +# like 'unsigned long int'.
|
| +
|
| +AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT],
|
| +[
|
| + AC_CACHE_CHECK([for unsigned long long int],
|
| + [ac_cv_type_unsigned_long_long_int],
|
| + [AC_LINK_IFELSE(
|
| + [_AC_TYPE_LONG_LONG_SNIPPET],
|
| + [ac_cv_type_unsigned_long_long_int=yes],
|
| + [ac_cv_type_unsigned_long_long_int=no])])
|
| + if test $ac_cv_type_unsigned_long_long_int = yes; then
|
| + AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1,
|
| + [Define to 1 if the system has the type `unsigned long long int'.])
|
| + fi
|
| +])
|
| +
|
| +# Expands to a C program that can be used to test for simultaneous support
|
| +# of 'long long' and 'unsigned long long'. We don't want to say that
|
| +# 'long long' is available if 'unsigned long long' is not, or vice versa,
|
| +# because too many programs rely on the symmetry between signed and unsigned
|
| +# integer types (excluding 'bool').
|
| +AC_DEFUN([_AC_TYPE_LONG_LONG_SNIPPET],
|
| +[
|
| + AC_LANG_PROGRAM(
|
| + [[/* For now, do not test the preprocessor; as of 2007 there are too many
|
| + implementations with broken preprocessors. Perhaps this can
|
| + be revisited in 2012. In the meantime, code should not expect
|
| + #if to work with literals wider than 32 bits. */
|
| + /* Test literals. */
|
| + long long int ll = 9223372036854775807ll;
|
| + long long int nll = -9223372036854775807LL;
|
| + unsigned long long int ull = 18446744073709551615ULL;
|
| + /* Test constant expressions. */
|
| + typedef int a[((-9223372036854775807LL < 0 && 0 < 9223372036854775807ll)
|
| + ? 1 : -1)];
|
| + typedef int b[(18446744073709551615ULL <= (unsigned long long int) -1
|
| + ? 1 : -1)];
|
| + int i = 63;]],
|
| + [[/* Test availability of runtime routines for shift and division. */
|
| + long long int llmax = 9223372036854775807ll;
|
| + unsigned long long int ullmax = 18446744073709551615ull;
|
| + return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i)
|
| + | (llmax / ll) | (llmax % ll)
|
| + | (ull << 63) | (ull >> 63) | (ull << i) | (ull >> i)
|
| + | (ullmax / ull) | (ullmax % ull));]])
|
| +])
|
|
|