From: Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Paul Eggert <eggert@cs.ucla.edu>
Cc: Spencer Baugh <sbaugh@janestreet.com>, 63556@debbugs.gnu.org
Subject: bug#63556: 29.0.90; Use of _Generic breaks Emacs build on GCC <4.9
Date: Fri, 19 May 2023 11:18:28 +0800 [thread overview]
Message-ID: <87ednd3t6j.fsf@yahoo.com> (raw)
In-Reply-To: <800a427a-514f-8ef5-326d-6abc06fb036a@cs.ucla.edu> (Paul Eggert's message of "Thu, 18 May 2023 20:05:59 -0700")
Paul Eggert <eggert@cs.ucla.edu> writes:
> On 5/18/23 17:46, Po Lu wrote:
>
>> How does intprops.h work on such systems?
>
> It relies on _Generic. (Those systems use neither GCC nor Clang.)
What about in C99 hosts?
> Fair enough, although I see more than just one other use: EMACS_INT
> (32-bit platforms configured --with-wide-int), color_distance,
`color_distance' is the first use I was referring to. And, so far,
`--with-wide-int' is optional.
> time_from_jiffies (in Linux), system_process_attributes (in Linux).
These seem to be system-specific.
> Currently there's a 'verify (PTRDIFF_MAX <= ULLONG_MAX);' protecting
> the use of elogb in lisp.h. Would it help to add a 'verify (max
> (-MOST_NEGATIVE_FIXNUM, MOST_POSITIVE_FIXNUM) <= ULLONG_MAX);' to
> protect its use in floatfns.c?
Sure. But it would make me feel a lot better if we could get away
without using `long long' at all on 32-bit systems.
next prev parent reply other threads:[~2023-05-19 3:18 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-17 17:38 bug#63556: 29.0.90; Use of _Generic breaks Emacs build on GCC <4.9 Spencer Baugh
2023-05-17 17:45 ` Eli Zaretskii
2023-05-17 17:57 ` Paul Eggert
2023-05-18 11:11 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-05-18 11:42 ` Eli Zaretskii
2023-05-18 13:21 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-05-18 14:12 ` Eli Zaretskii
2023-05-18 14:40 ` Paul Eggert
2023-05-19 0:46 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-05-19 3:05 ` Paul Eggert
2023-05-19 3:18 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2023-05-18 20:32 ` Paul Eggert
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