Re: Emacs 28 on OSX: emacsclient.c:1415: warning: implicit declaration of function 'openat'

[Po Lu <luangruo@yahoo.com>]

Keith David Bershatsky <esq@lawlist.com> writes:

> I located just one instance of 1060 and changed it to 1068 per your
> suggestion.  The build generated one warning during the nsterm.m
> section, and then moved on to nsfns.m, where the build stopped.

I think you meant nsmenu.m.

>   CC       nsmenu.o
> In file included from nsmenu.m:28:
> lisp.h:2156: warning: declaration does not declare anything
> nsmenu.m: In function '-[EmacsMenu fillWithWidgetValue:]':
> nsmenu.m:652: error: stray '@' in program
> nsmenu.m:652: error: field name not in record or union initializer
> nsmenu.m:652: error: (near initialization for 'font_attribs')
> nsmenu.m:652: warning: incompatible Objective-C types initializing 'struct NSFont *', expected 'struct NSDictionary *'

I don't know what "@" means in Objective-C, and it seems that GCC
doesn't support such a feature.  Would someone please explain this piece
of code?

  NSDictionary *font_attribs = @{NSFontAttributeName: menuFont};

> nsmenu.m:678: error: 'NSTextAlignmentRight' undeclared (first use in this function)
> nsmenu.m:678: error: (Each undeclared identifier is reported only once
> nsmenu.m:678: error: for each function it appears in.)
> nsmenu.m:680: error: stray '@' in program
> nsmenu.m:680: error: expected expression before '{' token
> nsmenu.m:683: error: stray '@' in program
> nsmenu.m:683: error: expected ':' before ']' token
> nsmenu.m:683: confused by earlier errors, bailing out

Likewise for the @{}s in the rest of this program.  Maybe it is some
kind of dictionary declaration, but where is the documentation?

Thanks.