I installed the following into Autoconf to propagate the gnulib fix
into Autoconf.
2006-11-07 Paul Eggert <[EMAIL PROTECTED]>
* lib/autoconf/types.m4 (AC_TYPE_LONG_LONG_INT): Detect bug in
Tandem NonStop Kernel (OSS) cc -O circa 2004, reported by
Matthew Woehlke.
--- lib/autoconf/types.m4.~1.47.~ 2006-10-22 21:58:53.000000000 -0700
+++ lib/autoconf/types.m4 2006-11-07 22:23:12.000000000 -0800
@@ -480,10 +480,34 @@ AC_DEFUN([AC_TYPE_LONG_LONG_INT],
int i = 63;]],
[[long long int llmax = 9223372036854775807ll;
return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i)
- | llmax / ll | llmax % ll);]])],
- [ac_cv_type_long_long_int=yes],
+ | (llmax / ll) | (llmax % ll));]])],
+ [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(
+ [EMAIL PROTECTED]:@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=cross-compiling])],
[ac_cv_type_long_long_int=no])])
- if test $ac_cv_type_long_long_int = yes; then
+ if test $ac_cv_type_long_long_int != no; then
AC_DEFINE([HAVE_LONG_LONG_INT], 1,
[Define to 1 if the system has the type `long long int'.])
fi
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