Robert P. J. Day wrote:
> sort of a combination of a C and gcc question but what's the rules
> these days on the following (ripped from the linux kernel source, from
> asm/semaphore.h)?
>
> ===
> static inline void sema_init (struct semaphore *sem, int val)
> {
> /*
> * *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
> *
> * i'd rather use the more flexible initialization above, but sadly
> * GCC 2.7.2.3 emits a bogus warning. EGCS doesn't. Oh well.
> */
> atomic_set(&sem->count, val);
> sem->sleepers = 0;
> init_waitqueue_head(&sem->wait);
> }
> ===
>
> i recall that earlier compilers complained about that first example
> of pointer indirection as the target of an assignment. is that legal
> these days?
The problem with the first example is that the __SEMAPHORE_INITIALIZER
macro uses C99 features, which probably aren't supported in gcc 2.7.x.
The LHS has nothing to do with it.
--
Glynn Clements <glynn@xxxxxxxxxxxxxxxxxx>
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