Re: stop using P_, __P in header files

[Dan Nicolaescu <dann@gnu.org>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Juanma Barranquero <lekktu@gmail.com>
>> Date: Mon, 5 Jul 2010 05:38:05 +0200
>> Cc: dann@gnu.org, Ken Raeburn <raeburn@raeburn.org>, emacs-devel@gnu.org
>> 
>> On Mon, Jul 5, 2010 at 05:05, Eli Zaretskii <eliz@gnu.org> wrote:
>> 
>> > Emacs is compiled not only by GCC.
>> 
>> True, but "register" never was more than a hint to the compiler.
>
> I'm not an expert, so I don't know.  Maybe someone else could chime
> in.  One issue that I'd be interested in is to know whether GCC uses
> this hint at some low optimization level, because I frequently need to
> use -O1 or -O0 to get a binary I can debug without getting older by
> the hour.

At -O0 you have bigger code quality problems (especially with gcc)
than "register".

A reference to comp.lang.C FAQ:

http://c-faq.com/~scs/cclass/krnotes/sx7f.html

And that's from the mid 90's.

AFAIK the register allocator in gcc does not try to look at "register".