bug#29644: gcc-objc is unusable without its 'gcc' executable

[Efraim Flashner <efraim@flashner.co.il>]

[-- Attachment #1.1: Type: text/plain, Size: 1290 bytes --]

On Sat, Sep 02, 2023 at 11:01:44PM +0200, Vivien Kraus via Bug reports for GNU Guix wrote:
> Hello!
> 
> I would like to learn and play with gnustep with objective-C, but it
> seems like GCC does not come with objective-C in Guix.
> 
> I don’t know much about GCC or how Guix packages it. There is an early
> comment by Ricardo Wurmus:
> 
> > The fix here is to patch “lang-spec.h”, so that it does not limit the
> > gcc executable to the configured set of languages.  This way we will
> > be
> > able to use the same gcc executable with different languages.
> 
> The source of gcc-objc has a file named gcc-12.3.0/gcc/objc/lang-
> specs.h that claims to be included as a static array literal, but I
> don’t know what the rest of this citation means.

I've appended a diff of the lib output of gcc and gcc-objc. According to
du adding objc support to regular gcc would increase the lib output by
368K. I think our best option is to move forward with adding objc/objc++
as languages which gcc simply provides without needing a separate
package.


-- 
Efraim Flashner   <efraim@flashner.co.il>   רנשלפ םירפא
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted

[-- Attachment #1.2: gcc-objc-diff --]
[-- Type: text/plain, Size: 1222 bytes --]

1c1
< /gnu/store/sxnv230gv2mj5x9v3gfadw118gkl2rcf-gcc-10.5.0-lib/
---
> /gnu/store/1p8hc8mrigismnndycwih2k2015v0z1q-gcc-objc-10.5.0-lib/
78a79,89
> │   │           │   ├── objc
> │   │           │   │   ├── message.h
> │   │           │   │   ├── NXConstStr.h
> │   │           │   │   ├── objc-decls.h
> │   │           │   │   ├── objc-exception.h
> │   │           │   │   ├── objc.h
> │   │           │   │   ├── objc-sync.h
> │   │           │   │   ├── Object.h
> │   │           │   │   ├── Protocol.h
> │   │           │   │   ├── runtime.h
> │   │           │   │   └── thr.h
645a657,661
> │   ├── libobjc.a
> │   ├── libobjc.la
> │   ├── libobjc.so -> libobjc.so.4.0.0
> │   ├── libobjc.so.4 -> libobjc.so.4.0.0
> │   ├── libobjc.so.4.0.0
682c698
<     │   └── gcc-10.5.0
---
>     │   └── gcc-objc-10.5.0
697c713
< 34 directories, 661 files
---
> 35 directories, 676 files

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]