Re: [bug #23996] arithmetic overflow when using -used

[Andreas Schwab]

"James Youngman" <address@hidden> writes:

> Yes, this is undefined behaviour in terms of the ISO C standard.  But
> if your comment accurately implies that there are actual systems
> on which this technique fails to work then we have a widespread
> problem;

That is correct, many people get that wrong.  Undefined behaviour means
that it is impossible to predict the result.

> including at least GNU tar

Then it needs to be fixed.

> and I think also gnulib and coreutils.

The authors of gnulib and coreutils are well aware of the problem.

> See in particular the Texinfo documentation for Autoconf.

Please expand.

Andreas.

-- 
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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