Date: Sun, 30 Jan 2011 20:11:42 +0100 From: Gary Jennejohn <gljennjohn@googlemail.com> To: Alexander Best <arundel@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: empty function macros Message-ID: <20110130201142.09f4b998@ernst.jennejohn.org> In-Reply-To: <20110130172941.GA10701@freebsd.org> References: <20110130172941.GA10701@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, 30 Jan 2011 17:29:41 +0000
Alexander Best <arundel@freebsd.org> wrote:
> hi there,
>
> i noticed freebsd has a few of the following macros:
>
> #define FUNC(sb)
>
> when you do something like
>
> if (cond)
> FUNC(i)
>
> the compiler complains about an if statement with an empty body. any sensible
> way of dealing with this issue?
>
> i saw some reiserfs code which does the following to silence compilers:
>
> #define FUNC(sb) do { } while (0)
>
What happens if you treat it like a real function call and put ';'
after it?
--
Gary Jennejohn (gj@)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20110130201142.09f4b998>