[PATCH] aliasing warning in ctype.h

[Jakub Jelinek]

On Fri, Mar 21, 2003 at 10:40:57AM +1100, Ian Wienand wrote:
> --- include/ctype.h.orig	2003-03-21 10:28:48.000000000 +1100
> +++ include/ctype.h	2003-03-21 10:27:40.000000000 +1100
> @@ -25,31 +25,28 @@
>  CTYPE_EXTERN_INLINE const uint16_t ** __attribute__ ((const))
>  __ctype_b_loc (void)
>  {
> -  const uint16_t **tablep =
> -    (const uint16_t **) __libc_tsd_address (CTYPE_B);
> +  void **tablep = __libc_tsd_address (CTYPE_B); 
>    if (__builtin_expect (*tablep == NULL, 0))
> -    *tablep = (const uint16_t *) _NL_CURRENT (LC_CTYPE, _NL_CTYPE_CLASS) + 128;
> -  return tablep;
> +    *tablep = ((void *)(_NL_CURRENT (LC_CTYPE, _NL_CTYPE_CLASS) + 128)); 
> +  return ((const uint16_t **)tablep);
>  }

This is wrong, although you shut up a warning, you actually create
code which (unlike original) does the illegal type punning
(and thus the compiler might/will miscompile it).

	Jakub