On Thu, Oct 08, 2009 at 01:40:11PM +0200, Guillem Jover wrote:
> Older versions of glibc used to declare ‘union semun’ in <sys/sem.h>,
> but POSIX.1-2001 requires the caller to declare it instead. Later
> versions of glibc started defining _SEM_SEMUN_UNDEFINED to note that
> the union was not being declared, but conforming systems are not
> required to define that macro (e.g. FreeBSD). As a side effect we get
> rid of some obsolete __GNU_LIBRARY__ macro usage.
>
> Signed-off-by: Guillem Jover <guillem@xxxxxxxxxxx>
Applied with small change:
> -#if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
> +#if defined (HAVE_UNION_SEMUN)
> /* union semun is defined by including <sys/sem.h> */
> #else
> /* according to X/OPEN we have to define it ourselves */
I think
#ifndef HAVE_UNION_SEMUN
union semum {
...
}
#endif
looks more readable better.
Thanks.
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
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