bug#38083: 27.0.50; Deprecation warnings in NS build

[Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> I rooted out my Apple laptop (Macos 12.3.1, which is probably the
> newest?), and I get the following warnings:
>
> xwidget.c:491:19: warning: variable 'xw' set but not used [-Wunused-but-set-variable]
>   struct xwidget *xw;
>                   ^
> xwidget.c:493:23: warning: unused variable 'keycode' [-Wunused-variable]
>   int character = -1, keycode = -1;
>                       ^
> xwidget.c:492:17: warning: variable 'f' set but not used [-Wunused-but-set-variable]
>   struct frame *f = NULL;
>                 ^
> xwidget.c:493:7: warning: unused variable 'character' [-Wunused-variable]
>   int character = -1, keycode = -1;
>       ^
> xwidget.c:494:7: warning: unused variable 'modifiers' [-Wunused-variable]
>   int modifiers = 0;
>       ^

The NS xwidget implementation is currently completely broken.  I wrote
that in etc/TODO, and patches are welcome, since I don't know my way
around the Mac OS WebKit APIs.

> nsfns.m:841:47: warning: 'iconForFileType:' is deprecated: first deprecated in macOS 12.0 - Use -[NSWorkspace iconForContentType:] instead. [-Wdeprecated-declarations]
>       image = [[[NSWorkspace sharedWorkspace] iconForFileType: @"text"] retain];
>                                               ^
> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSWorkspace.h:456:1: note: 'iconForFileType:' has been explicitly marked deprecated here
> - (NSImage *)iconForFileType:(NSString *)fileType API_DEPRECATED("Use -[NSWorkspace iconForContentType:] instead.", macos(10.0, 12.0));
> ^
> nsfns.m:1760:12: warning: 'setAllowedFileTypes:' is deprecated: first deprecated in macOS 12.0 - Use -allowedContentTypes instead [-Wdeprecated-declarations]
>     [panel setAllowedFileTypes: nil];
>            ^
> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSSavePanel.h:215:49: note: property 'allowedFileTypes' is declared deprecated here
> @property (nullable, copy) NSArray<NSString *> *allowedFileTypes API_DEPRECATED("Use -allowedContentTypes instead", macos(10.3,12.0));
>                                                 ^
> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSSavePanel.h:215:49: note: 'setAllowedFileTypes:' has been explicitly marked deprecated here
> nsfns.m:2599:11: warning: 'IOMasterPort' is deprecated: first deprecated in macOS 12.0 [-Wdeprecated-declarations]
>       if (IOMasterPort (MACH_PORT_NULL, &masterPort) != kIOReturnSuccess
>           ^~~~~~~~~~~~
>           IOMainPort
> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/IOKit.framework/Headers/IOKitLib.h:132:1: note: 'IOMasterPort' has been explicitly marked deprecated here
> IOMasterPort( mach_port_t       bootstrapPort,
> ^
>   CC       lastfile.o
> 3 warnings generated.

I will look into the others, thanks.