From: "Maciej W. Rozycki" <macro@codesourcery.com>
To: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: <cgen@sourceware.org>, Alan Modra <amodra@gmail.com>,
<fche@sourceware.org>, Christian Svensson <blue@cmd.nu>,
Pierre Muller <pierre.muller@ics-cnrs.unistra.fr>
Subject: Re: [PATCH] Make large enum constants unsigned
Date: Thu, 22 May 2014 06:22:00 -0000 [thread overview]
Message-ID: <alpine.DEB.1.10.1405220702380.512@tp.orcam.me.uk> (raw)
In-Reply-To: <20140522052921.GA30609@chokladfabriken.org>
On Thu, 22 May 2014, Stefan Kristiansson wrote:
> this fixes a bug noted in two threads on the binutils mailing list:
> https://sourceware.org/ml/binutils/2014-05/msg00152.html
> https://sourceware.org/ml/binutils/2014-05/msg00195.html
>
> Both threads describe the problem pretty well, but the gist of it
> is that constants are generated that will be interpreted as signed.
>
> 2014-05-22 Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
>
> * enum.scm (gen-enum-decl): Emit 'ULL' after constants larger than
> #x80000000
Well, `ULL' is non-standard for pre-C99 compilers and also not needed
because an enum will never have a type that is wider than `int'. So for
portability's sake I suggest that you use `U' or `u' as I proposed (I
prefer lowercase `u' for decimal constants because I find it easier to
spot among digits, however please feel free to take your pick).
Maciej
next prev parent reply other threads:[~2014-05-22 6:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-22 5:30 Stefan Kristiansson
2014-05-22 6:22 ` Maciej W. Rozycki [this message]
2014-05-22 6:52 ` Stefan Kristiansson
2014-05-22 7:10 ` Stefan Kristiansson
2014-05-22 13:33 ` Pierre Muller
[not found] ` <5561926758764771034@unknownmsgid>
2014-05-22 14:10 ` Stefan Kristiansson
2014-05-22 16:14 ` Maciej W. Rozycki
2014-05-22 15:11 ` Frank Ch. Eigler
2014-05-22 17:34 ` Stefan Kristiansson
2014-05-22 21:06 ` Frank Ch. Eigler
2014-05-22 21:42 ` Maciej W. Rozycki
2014-05-22 22:20 ` Frank Ch. Eigler
2014-05-29 20:09 ` Stefan Kristiansson
2014-05-29 20:32 ` Frank Ch. Eigler
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