bug#48804: 27.2; compilation emacs on macOS

[Eli Zaretskii]

> From: Niels Søndergaard <nisoni@algon.dk>
> Date: Fri, 4 Jun 2021 14:59:54 +0200
> Cc: Alan Third <alan@idiocy.org>,
>  Niels Søndergaard <nisoni@algon.dk>,
>  Konrad Podczeck <konrad.podczeck@univie.ac.at>,
>  48804@debbugs.gnu.org
> 
> Now I god this error in the “configure —with-native-compilation” ,
> 
> checking AppKit/AppKit.h usability... no
> checking AppKit/AppKit.h presence... yes
> configure: WARNING: AppKit/AppKit.h: present but cannot be compiled
> configure: WARNING: AppKit/AppKit.h:     check for missing prerequisite 
> headers?
> configure: WARNING: AppKit/AppKit.h: see the Autoconf documentation
> configure: WARNING: AppKit/AppKit.h:     section "Present But Cannot Be 
> Compiled"
> configure: WARNING: AppKit/AppKit.h: proceeding with the compiler's result
> configure: WARNING:     ## ------------------------------------ ##
> configure: WARNING:     ## Report this to bug-gnu-emacs@gnu.org ##
> configure: WARNING:     ## ------------------------------------ ##
> checking for AppKit/AppKit.h... no
> configure: error: The include files (AppKit/AppKit.h etc) that
> are required for a Nextstep build are missing or cannot be compiled.
> Either fix this, or re-configure with the option '--without-ns’. 
> 
> And I didn’t specify “—with-ns” this time

Was the compiler GCC by any chance?