bug#44973: Add a macOS global hotkey function

[Alan Third]

On Mon, Dec 21, 2020 at 06:18:58PM +0200, Eli Zaretskii wrote:
> > Date: Mon, 21 Dec 2020 08:12:04 +0000
> > From: Alan Third <alan@idiocy.org>
> > Cc: 44973@debbugs.gnu.org, Lars Ingebrigtsen <larsi@gnus.org>
> > 
> > One potential problem with your approach is that we don't accept code
> > using Objective C blocks as it's incompatible with GCC. Unless that
> > policy has changed?
> 
> It hasn't changed, but does this code really need to use that feature?
> The last time we had a much more grave problem: the system header used
> for some code itself used ObjC blocks, and thus couldn't be compiled
> by GCC.  It looks like this case is not that problematic?

The class method used takes a block as an argument. I don't think
there are any work-arounds.

The GCC work to support blocks appears to be progressing, but slowly:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78352
-- 
Alan Third