gcc-objc is unusable without its 'gcc' executable

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6 participants

Zhu Zihao
Efraim Flashner
???
Maxime Devos
Ricardo Wurmus
Vivien Kraus

Owner: unassigned

Submitted by: ???

Severity: normal

??? wrote on 10 Dec 2017 15:26

Recipients:(address . bug-guix@gnu.org)(name . Ricardo Wurmus)(address . rekado@elephly.net)

Message-ID:87k1xuhd63.fsf@member.fsf.org

Hello, unlike fortran program files which can be compiled using the
command 'gfortran' (in addition to 'gcc'), there is no other command for
Objective-C program files, and run 'gcc -c x.m' using the 'gcc' package
will just complain "Objective-C compiler not installed on this system"
due to it lacking objc support.

I have to revert commit 82f145ef7a to get a objc enabled 'gcc' in the
'gcc-objc' package.

IIUC, the purpose of that commit is to avoid file collisions between
'gfortran' and the 'gcc' package used in the 'gnu-build-system', which
will broke the compiler in some way.  So I think we really want to only
have one gcc package in an environment...

How about enable all languages (except 'brig' which I never heard of)
for the gcc-final and the 'gcc' (in gcc.scm) packages?  In this way, I
think 'gnu-build-system' and 'gcc-toolchain' will able to compile
Fortran, Objective-C, Go, etc. out of the box.

Ricardo Wurmus wrote on 10 Dec 2017 19:49

Recipients:(name . ???)(address . iyzsong@member.fsf.org)(address . 29644@debbugs.gnu.org)

Message-ID:87shciwh9b.fsf@elephly.net

??? <iyzsong@member.fsf.org> writes:

Toggle quote (9 lines)

> Hello, unlike fortran program files which can be compiled using the

> command 'gfortran' (in addition to 'gcc'), there is no other command for

> Objective-C program files, and run 'gcc -c x.m' using the 'gcc' package

> will just complain "Objective-C compiler not installed on this system"

> due to it lacking objc support.

> I have to revert commit 82f145ef7a to get a objc enabled 'gcc' in the

> 'gcc-objc' package.

In May 2016 I first noticed this problem with GCC and investigated

solutions.

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.

Ricardo

GPG: BCA6 89B6 3655 3801 C3C6 2150 197A 5888 235F ACAC

https://elephly.net

Zhu Zihao wrote on 26 Mar 2022 06:49

Re: gcc-objc is unusable without its 'gcc' executable.

Recipients:(address . 29644@debbugs.gnu.org)

Message-ID:86pmm91ctl.fsf@163.com

I'm planning to package some GNUStep packages to Guix, but the gcc-objc

is broken.

Any one interested in fixing GCC? or I' ll plan to make gnustep-make use

clang instead of GCC.

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Zihao

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Maxime Devos wrote on 26 Mar 2022 11:16

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

Recipients:

Message-ID:a9b49de7822c20b0a24825c8c50439600364d6bd.camel@telenet.be

Zhu Zihao schreef op za 26-03-2022 om 13:49 [+0800]:

Toggle quote (5 lines)

> I'm planning to package some GNUStep packages to Guix, but the gcc-

> objc is broken.

> Any one interested in fixing GCC? [...]

How is it broken? Is there some error message or something?

Greetings,

Maxime.

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Zhu Zihao wrote on 26 Mar 2022 11:53

Recipients:(name . Maxime Devos)(address . maximedevos@telenet.be)(address . 29644@debbugs.gnu.org)

Message-ID:861qypx9bd.fsf@163.com

You can try with (on d05fcc21cb9509084a0424e6808b84b58dc52d62, but I

guess the commit doesn't matters.)

```

guix shell gcc@10 gcc-objc@10 clang@13

cat > hello.m << "EOF"

#include <stdio.h>

int main(int argc, const char * argv[]) {

printf ("Hello, world!\n");

return 0;

}

EOF

```

`LANG=C gcc hello.m -o hello` complains that Objective-C compiler is not

installed.

`LANG=C clang hello.m -o hello` can compile to hello binary.

Even I try set environment variable GCC_EXEC_PREFIX (described in

https://gcc.gnu.org/onlinedocs/gcc/Environment-Variables.html)

GCC_EXEC_PREFIX=$GUIX_ENVIRONMENT/libexec/gcc/x86_64-unknown-linux-gnu/10.3.0 gcc hello.m -o hello

or pass option

`-B$GUIX_ENVIRONMENT/libexec/gcc/x86_64-unknown-linux-gnu/10.3.0`. It

still says no Objective-C compiler.

Maxime Devos <maximedevos@telenet.be> writes:

Toggle quote (15 lines)> [[PGP Signed Part:Undecided]]
> Zhu Zihao schreef op za 26-03-2022 om 13:49 [+0800]:
>> I'm planning to package some GNUStep packages to Guix, but the gcc-
>> objc is broken.
>> 
>> Any one interested in fixing GCC? [...]
>
> How is it broken?  Is there some error message or something?
>
> Greetings,
> Maxime.
>
> [[End of PGP Signed Part]]

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Zihao

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Maxime Devos wrote on 26 Mar 2022 13:29

Recipients:(name . Zhu Zihao)(address . all_but_last@163.com)(address . 29644@debbugs.gnu.org)

Message-ID:7a2e94861fbfbf9364250f63ff671efbc86ffb71.camel@telenet.be

Zhu Zihao schreef op za 26-03-2022 om 18:53 [+0800]:

Toggle quote (3 lines)

> `LANG=C gcc hello.m -o hello` complains that Objective-C compiler is

> not installed.

I noticed the output of "guix build gcc-objc" does not contain any

binaries in 'bin' and neither does there appear to be some objc shared

library. I guess this is caused by the following line:

(add-after 'install 'remove-broken-or-conflicting-files

(lambda* (#:key outputs #:allow-other-keys)

(for-each

delete-file

(find-files (string-append (assoc-ref outputs "out")

"/bin")

".*(c\\+\\+|cpp|g\\+\\+|gcov|gcc|lto)(-

.*)?$"))))))))))

I'm wondering if any of the following commits fix or break things:

* 5318bade32e2a3a801e838286439074aeaf1e3c7

(this one modified the regex)

* a159586f8ae4db8a0fcf608b411f962817c3db60

(the commit before)

* 82f145ef7aef8f4d28a144ee8efcadf3fdd4b877

(this one introduced the phase)

* ce6027bf43210d0b68bb26dbf110ca6c47aa8478

(the commit before)

Make sure to run this in an environment "guix environment --pure --ad-hoc gcc-objc"

(*) without the "gcc" package, to avoid the gcc package overriding the

hypothetical gcc from the "gcc-objc" package.

Or maybe some plugin architecture is used, I don't know..

Greetings,

Maxime.

(*) some of these commits are from before the introduction of "guix shell"

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Zhu Zihao wrote on 26 Mar 2022 15:14

Recipients:(name . Maxime Devos)(address . maximedevos@telenet.be)(address . 29644@debbugs.gnu.org)

Message-ID:86fsn4kdco.fsf@163.com

Maxime Devos <maximedevos@telenet.be> writes:

Toggle quote (2 lines)

> Or maybe some plugin architecture is used, I don't know..

I think the problem is pointed out by Ricardo Wurmus in this reply https://issues.guix.gnu.org/29644#1

Retrieve my PGP public key:

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Zihao

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Maxime Devos wrote on 26 Mar 2022 15:50

Recipients:(name . Zhu Zihao)(address . all_but_last@163.com)(address . 29644@debbugs.gnu.org)

Message-ID:ffd013a58b1efe703c5ad6cff2d0d2ee9a326ad0.camel@telenet.be

Zhu Zihao schreef op za 26-03-2022 om 22:14 [+0800]:

Toggle quote (6 lines)

> Maxime Devos <maximedevos@telenet.be> writes:

> > Or maybe some plugin architecture is used, I don't know..

> I think the problem is pointed out by Ricardo Wurmus in this reply https://issues.guix.gnu.org/29644#1

Ok, I thought this was a new bug report, but apparently it is a reply

to an old report.

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Vivien Kraus wrote on 2 Sep 2023 23:01

gcc-objc is unusable without its 'gcc' executable

Recipients:(address . 29644@debbugs.gnu.org)

Message-ID:6c180fad5282e58bc5c2f3b19a113098cf86d7fb.camel@planete-kraus.eu

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:

Toggle quote (5 lines)

> 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.

Vivien

Efraim Flashner wrote on 6 Nov 2023 09:55

Recipients:(name . Vivien Kraus)(address . vivien@planete-kraus.eu)

Message-ID:ZUip7OGwJEBCP-5p@3900XT

On Sat, Sep 02, 2023 at 11:01:44PM +0200, Vivien Kraus via Bug reports for GNU Guix wrote:

Toggle quote (17 lines)> 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>   ????? ?????
GPG key = A28B F40C 3E55 1372 662D  14F7 41AA E7DC CA3D 8351
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1c1
< /gnu/store/sxnv230gv2mj5x9v3gfadw118gkl2rcf-gcc-10.5.0-lib/
---

Toggle quote (1 lines)

> /gnu/store/1p8hc8mrigismnndycwih2k2015v0z1q-gcc-objc-10.5.0-lib/

78a79,89

Toggle quote (11 lines)> ?�� ?��         ?�� ??? 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

Toggle quote (5 lines)> ?�� ??? 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
---

Toggle quote (1 lines)

> ?�� ??? gcc-objc-10.5.0

697c713
< 34 directories, 661 files
---

Toggle quote (1 lines)

> 35 directories, 676 files

Efraim Flashner wrote on 10 Dec 2023 10:34

Re: bug#66965: Acknowledgement ([CORE-UPDATES PATCH] gnu: gcc: Support objc, objc++ by default.)

Recipients:

Message-ID:ZXWGGrD1jDc1DcHr@3900XT

Patch pushed to core-updates with minimal changes.

-- 
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