linux-kernel - Re: [PATCH v4 1/2] system_data

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Date:   Fri, 2 Oct 2020 22:27:20 +0200
From:   Alejandro Colomar <colomar.6.4.3@...il.com>
To:     Paul Eggert <eggert@...ucla.edu>, mtk.manpages@...il.com,
        "G. Branden Robinson" <g.branden.robinson@...il.com>
Cc:     linux-man@...r.kernel.org, gcc-patches@....gnu.org,
        libc-alpha@...rceware.org, linux-kernel@...r.kernel.org,
        jwakely.gcc@...il.com, David.Laight@...LAB.COM
Subject: Re: [PATCH v4 1/2] system_data_types.7: Add 'void *'

Hi Paul,

On 2020-10-02 22:14, Paul Eggert wrote:
 > On 10/2/20 11:38 AM, Alejandro Colomar wrote:
 >
 >> .I void *
 >>
 >> renders with a space in between.
 >
 > That's odd, as "man(7)" says "All of the arguments will be printed next
 > to each other without intervening spaces". I'd play it safe and quote
 > the arg anyway.

Oops, that's a bug in man(7).
Don't worry about it.

Michael, you might want to have a look at it.

I'll also add Branden, who might have something to say about it.

 >
 >>  > %p works with any object pointer type (or in POSIX, any pointer 
type),
 >>  > not just  void *.
 >> In theory, no (if otherwise, I'd like to know why):
 >
 > Oh, you're right. I had missed that. In GNU/Linux hosts, though, any
 > pointer (including function pointers) can be given to %p.
 >
 > The only platforms where %p wouldn't work on all pointers would be
 > platforms like IBM i, which has both 64-bit (process local) pointers and
 > 128-bit (tagged space) pointers and where you can declare and use
 > pointers of different widths in the same program.

:-)

Cheers,

Alex