Path: ...!2.eu.feeder.erje.net!feeder.erje.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: Word For Today: =?utf-8?Q?=E2=80=9CUglification=E2=80=9D?=
Date: Thu, 14 Mar 2024 19:19:57 -0700
Organization: None to speak of
Lines: 39
Message-ID: <87il1o44oi.fsf@nosuchdomain.example.com>
References: <uso6or$3t3jn$3@dont-email.me> <20240311202758.193@kylheku.com>
	<86v85opw22.fsf@linuxsc.com> <87v85o4i1v.fsf@nosuchdomain.example.com>
	<87msr04afd.fsf@nosuchdomain.example.com>
	<lIMIN.574792$xHn7.491768@fx14.iad>
MIME-Version: 1.0
Content-Type: text/plain
Injection-Info: dont-email.me; posting-host="1424ef631298fc5a748d3d307144615d";
	logging-data="2064836"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19Xsd5nheE7O4ZU2MFQyQkt"
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)
Cancel-Lock: sha1:UfLOVf626kORHBiPetUo7dOZ43k=
	sha1:njf/Xa9G8OW6vpCeAjq9dyjtsxU=
Bytes: 2671

scott@slp53.sl.home (Scott Lurndal) writes:
> Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:
>>Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:
>>[...]
>>> For context, here's the entire file from my system (Ubuntu 24.0.4,
>>> package libc6-dev:amd64 2.35-0ubuntu3.6).  I get the impression that the
>>> author(s) decided not to use memset to avoid the required #include,
>>> which might increase compilation times for code that indirectly includes
>>> this header.  (I offer no opinion on whether that's a good tradeoff.)
>>[...]
>>
>>An older version did use memset().  It was changed to use a loop in
>>1997, with a commit message that included:
>>    "Don't use memset to prevent prototype trouble, use simple loop."
>>It may have been to avoid problems with pre-ANSI C compilers that didn't
>>support prototypes.  That's still speculation on my part.
>
> Here's the full fc20 version:
> $ rpm -q -f /usr/include/bits/select.h
> glibc-headers-2.18-19.fc20.x86_64
>
>
[...]
> #if defined __GNUC__ && __GNUC__ >= 2
[...]
> #else   /* ! GNU CC */
[...]
> #endif  /* GNU CC */
[...]

I don't see that in the GNU glibc git repo, even on branches with
"fedora" in their names.  Perhaps it's a change applied by Red Hat and
not propagated upstream.  (Though I'm not sure why Red Hat would need to
allow for glibc not being compiled by gcc.)

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Medtronic
void Void(void) { Void(); } /* The recursive call of the void */