From: Mike Frysinger <vapier@gentoo.org>
To: Richard Earnshaw <Richard.Earnshaw@foss.arm.com>
Cc: newlib@sourceware.org
Subject: Re: [PATCH v2] newlib: fix build with <gcc-5 versions
Date: Tue, 15 Mar 2022 19:54:00 -0400 [thread overview]
Message-ID: <YjEnGIyU31Kl6zYJ@vapier> (raw)
In-Reply-To: <2c68b0f8-03ad-d93d-dd35-002a66576ff8@foss.arm.com>
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On 15 Mar 2022 12:41, Richard Earnshaw wrote:
> On 15/03/2022 03:25, Mike Frysinger wrote:
> > __builtin_mul_overflow showed up with gcc-5, so stub it out for older
> > versions.
> > ---
> > newlib/libc/include/sys/cdefs.h | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/newlib/libc/include/sys/cdefs.h b/newlib/libc/include/sys/cdefs.h
> > index da729092185c..e51f7f4b873a 100644
> > --- a/newlib/libc/include/sys/cdefs.h
> > +++ b/newlib/libc/include/sys/cdefs.h
> > @@ -416,6 +416,10 @@
> > #define __unreachable() ((void)0)
> > #endif
> >
> > +#if !__GNUC_PREREQ__(5, 0)
> > +#define __builtin_mul_overflow(a, b, size) ({ *(size) = (a) * (b); 0; })
>
> Wouldn't
> (*(size) = (a) * (b), 0)
>
> be more portable (avoiding the GNU statement expression extension)?
sure, that works too, thanks
-mike
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next prev parent reply other threads:[~2022-03-15 23:53 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-14 3:25 [PATCH] " Mike Frysinger
2022-03-14 7:36 ` Sebastian Huber
2022-03-14 16:58 ` Mike Frysinger
2022-03-15 3:25 ` [PATCH v2] " Mike Frysinger
2022-03-15 12:41 ` Richard Earnshaw
2022-03-15 23:54 ` Mike Frysinger [this message]
2022-03-16 7:12 ` R. Diez
2022-03-16 8:30 ` Mike Frysinger
2022-03-16 9:17 ` R. Diez
2022-03-17 2:41 ` Mike Frysinger
2022-03-17 9:49 ` Corinna Vinschen
2022-03-17 11:26 ` Richard Earnshaw
2022-03-18 7:24 ` Corinna Vinschen
2022-03-18 8:30 ` R. Diez
2022-03-18 9:26 ` Corinna Vinschen
2022-03-18 9:45 ` R. Diez
2022-03-20 1:22 ` Mike Frysinger
2022-03-20 1:21 ` Mike Frysinger
2022-03-20 13:57 ` Jordi Sanfeliu
2022-03-20 12:52 ` Eric Bresie
2022-03-20 14:16 ` Mike Frysinger
2022-03-15 23:53 ` [PATCH v3] " Mike Frysinger
[not found] <1647792834.2524.0.ref@smtp.mail.att.net>
2022-03-20 16:13 ` [PATCH v2] " Steven J Abner
[not found] <1647807849.2524.1.ref@smtp.mail.att.net>
2022-03-20 20:24 ` Steven J Abner
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