Paul Eggert wrote:
> I installed this into Autoconf:
>
> 2007-11-13 Paul Eggert <[EMAIL PROTECTED]>
> ...
> * lib/autoconf/types.m4 (_AC_TYPE_LONG_LONG_SNIPPET):
> Do not check for preprocessor flows.
'flows'? 'flaws'!
Also, I would prefer to not let autoconf/lib/autoconf/types.m4 and
gnulib/m4/longlong.m4 go out of sync. This proposed patch resynchronizes
autoconf with the comments that you added to gnulib a day earlier:
--- lib/autoconf/types.m4.bak 2007-11-14 01:37:44.000000000 +0100
+++ lib/autoconf/types.m4 2007-11-14 01:37:58.000000000 +0100
@@ -475,7 +475,11 @@
AC_DEFUN([_AC_TYPE_LONG_LONG_SNIPPET],
[
AC_LANG_PROGRAM(
- [[/* Test literals. */
+ [[/* 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;
