31 Aug
2016
31 Aug
'16
8:37 p.m.
On Wed, Aug 31, 2016 at 9:32 AM, Ron Natalie <ron(a)ronnatalie.com> wrote:
The null pointer constant does not need a cast on ANY
architecture .
Well, it's a matter of what counts as "need". People normally expect
execl("/bin/sh", "sh", "-c", "date", NULL) to
work, but it will not on
systems
that define NULL as 0 and have different sizes of integers and pointers
(or, Ghu forbid, null pointers that are not all-bits-0). The man page is
careful to warn against this practice, but it is commonplace anyhow,
and on such architectures, defining NULL as (void *)0 will protect
users against this situation.
--
John Cowan http://www.ccil.org/~cowan cowan(a)ccil.org
Clear? Huh! Why a four-year-old child could understand this report.
Run out and find me a four-year-old child. I can't make head or tail
out of it. --Rufus T. Firefly on government reports