gcc-objc is unusable without its 'gcc' executable

宋

宋文武 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 . 宋文武)(address . iyzsong@member.fsf.org)(address . 29644@debbugs.gnu.org)

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

宋文武 <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 06:49 +0100

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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Maxime Devos wrote on 26 Mar 11:16 +0100

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 11:53 +0100

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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gpg --recv-keys D47A9C8B2AE3905B563D9135BE42B352A9F6821F

Zihao

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Maxime Devos wrote on 26 Mar 13:29 +0100

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 15:14 +0100

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

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Maxime Devos wrote on 26 Mar 15:50 +0100

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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