Date: 22 Nov 1998 12:12:25 -0600 From: Joel Ray Holveck <joelh@gnu.org> To: nectar@FreeBSD.ORG Cc: hackers@FreeBSD.ORG Subject: Re: errno Message-ID: <86yap3oauu.fsf@detlev.UUCP> In-Reply-To: nectar@FreeBSD.ORG's message of "Sun, 22 Nov 1998 10:04:21 -0600 (CST)" References: <XFMail.981122100421.nectar@FreeBSD.ORG>
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> The following code snippet won't compile on -CURRENT, or on -STABLE with
> _THREAD_SAFE defined due to ``errno'' being a macro in <errno.h>:
> #include <errno.h>
> struct example {
> int errno;
> };
> I understand why, but is this code incorrect ANSI C? I'm just
> trying to find a reference that prohibits this use.
This may be better in comp.lang.c.
The way I understand it, errno is explicitly allowed to be defined as
a macro evaluating to a modifiable lvalue. I don't have a C standard
handy, but I'm nearly (95%) certain that the ISO standard allows our
macro. I don't know about ANSI, but it is usually the same.
Happy hacking,
joelh
--
Joel Ray Holveck - joelh@gnu.org
Fourth law of programming:
Anything that can go wrong wi
sendmail: segmentation violation - core dumped
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