bug#57029: macos cannot build emacs after updated gcc and libgccjit to 12.1

[Eli Zaretskii <eliz@gnu.org>]

merge 57029 57015
thanks

> Date: Sun, 07 Aug 2022 03:29:47 +0000
> From:  ccqpein via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> I just update the gcc and the libgccjit through `brew` tonight and find building the emacs from source has
> issue. 
> 
> after `./autogen.sh`, I ran the `./configure --with-native-compilation` (for simplifying) and got the error
> message that 
> 
> ```
> checking for gcc_jit_context_acquire in -lgccjit... no
> configure: error: ELisp native compiler was requested, but libgccjit was not found.
> Please try installing libgccjit or a similar package.
> If you are sure you want Emacs be compiled without ELisp native compiler,
> pass the --without-native-compilation option to configure.
> ```
> 
> I add `echo $MAC_CFLAGS` and `echo $MAC_LIBS` after line 4269 in `configure.ac` and I figure out it gives
> me the right including path of libgccjit 12. 
> 
> ```
> -I/usr/local/Cellar/libgccjit/12.1.0/include
> -L/usr/local/Cellar/libgccjit/12.1.0/lib/gcc/current /usr/local/Cellar/libgccjit/12.1.0/lib/gcc/12
> ```
> 
> my environment:
> 
> macOS 12.5
> intel CPU

Thanks, this is a duplicate of bug#57015.