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

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

[ccqpein via Bug reports for GNU Emacs, the Swiss army knife of text editors]

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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.

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

[Eli Zaretskii]

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.

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

[Lars Ingebrigtsen]

Stefan Kangas <stefankangas@gmail.com> writes:

>> Is it really a problem to use only libgccjit 12.0 and older for the
>> release branch?
>
> I'm afraid that it's a serious problem.

Yes, I think we have to put a fix for this on the release branch, but as
Eli says, it must be safe.  (And this has been a surprisingly difficult
thing to get right -- it seems so simple, but the differences between
brew/Macports/versions of the basic utilities have led to numerous
breakages here.)

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

[Gerd Möllmann]

Andreas Schwab <schwab@suse.de> writes:

> This x prefix is not about emptyness, but preventing a pre-POSIX test
> utility from being confused by the leading dash.

Ah right, I forgot that.  Thanks.

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

[Eli Zaretskii]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: Stefan Kangas <stefankangas@gmail.com>,  57029@debbugs.gnu.org,
>   57015@debbugs.gnu.org,  dario.gjorgjevski@gmail.com,
>   naofumi@yasufuku.dev
> Date: Fri, 19 Aug 2022 09:24:27 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > We could, but that won't help our users.
> 
> Any objections to a fix in master?

Not on master, no.  My problem is what to do with the release branch.
If you think the solution based on Ruby is fine and safe, please
install that on the release branch (and it will be soon merged to
master).

Otherwise, which of the other solutions proposed here and in related
discussions do you recommend that is safe enough for the release
branch?

Thanks.

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

[Gerd Möllmann]

Eli Zaretskii <eliz@gnu.org> writes:

> If you think the solution based on Ruby is fine and safe, please
> install that on the release branch (and it will be soon merged to
> master).

Thanks!  I've done that on emacs-28.

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

[Lars Ingebrigtsen]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

>> If you think the solution based on Ruby is fine and safe, please
>> install that on the release branch (and it will be soon merged to
>> master).
>
> Thanks!  I've done that on emacs-28.

And I guess that fixed this bug?  So I'm closing this bug report now.

(If I misunderstood, please respond to the debbugs address and we'll
reopen.)