Re: C++ error

[Laurent Gatto <laurent.gatto@gmail.com>]

Hi,

```
$ guix package -I gcc
gcc-toolchain    14.2.0    out
/gnu/store/x2kv3zw2k7ql211m5kvb6yw401gab0x9-gcc-toolchain-14.2.0
```

but nothing matches stdc++

```
$ guix package -I stdc\+\+
```

If I `guix search for stdc\+\+`, I get, libstdc++-doc 9.5.0 and 5.5.0,
texlive-stdclsdv, ocaml-stdcompat and rust-link-cplusplus. Is this
normal?

```
$ guix describe
Generation 63    Nov 13 2024 00:02:27    (current)
  guix-science 7304e37
    repository URL: https://codeberg.org/guix-science/guix-science.git
    branch: master
    commit: 7304e37d4d664f27a18577e388c91413878d62fc
  nonguix 99574ff
    repository URL: https://gitlab.com/nonguix/nonguix
    branch: master
    commit: 99574ff94b6fb97794ba720b6fdadf470963dbdc
  lguix-channel 4aa4417
    repository URL: https://codeberg.org/lgatto/lguix-channel.git
    branch: main
    commit: 4aa4417eec58db3d5a9f1c90250ef57641489717
  guix 4e028ec
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 4e028ecc823bcdbb69c391ad7079085cd7749b15
```

The only non-standard channel is my own, that only provides a couple
of packages. I doubt this is the culprit, as there is no gcc related
package and I was already experiencing issues before setting it up.


Laurent


On Wed, 13 Nov 2024 at 01:50, Fredrik Salomonsson <plattfot@posteo.net> wrote:
>
> Hi,
>
> Laurent Gatto <laurent.gatto@gmail.com> writes:
>
> > Hi Fredrik,
> >
> > Thank you for taking the time looking into this.
>
> No worries.
>
> >
> > My issue doesn't seem to be related to an old gcc version.
> >
> > ```
> > $ g++ --version
> > g++ (GCC) 14.2.0
> > Copyright (C) 2024 Free Software Foundation, Inc.
> > This is free software; see the source for copying conditions.  There is NO
> > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> > ```
> >
> > My location is different though
> >
> > ```
> > $ which g++
> > /home/lgatto/.guix-profile/bin/g++
> > ```
> > Checking the stdc++ lib:
> >
> > ```
> > $ sed -n '3154p' ~/.guix-profile/include/c++/type_traits
> >   _GLIBCXX20_DEPRECATED("use is_standard_layout_v && is_trivial_v instead")
> > ```
> >
> > And the gcc search paths on my machine:
> >
> > ```
> > $ echo | g++ -E -Wp,-v -
> > ignoring nonexistent directory "/no-gcc-local-prefix/include"
> > ignoring nonexistent directory
> > "/gnu/store/ikn0imxfc6n0ba12mrf0c4hc1jm7ylc7-gcc-14.2.0-lib/lib/gcc/x86_64-unknown-linux-gnu/14.2.0/../../../../../../../x86_64-unknown-linux-gnu/include"
> > ignoring duplicate directory "/home/lgatto/.guix-profile/include"
> >   as it is a non-system directory that duplicates a system directory
> > #include "..." search starts here:
> > #include <...> search starts here:
> >  /home/lgatto/.guix-profile/include
> >  /gnu/store/ikn0imxfc6n0ba12mrf0c4hc1jm7ylc7-gcc-14.2.0-lib/lib/gcc/x86_64-unknown-linux-gnu/14.2.0/include
> >  /gnu/store/ikn0imxfc6n0ba12mrf0c4hc1jm7ylc7-gcc-14.2.0-lib/lib/gcc/x86_64-unknown-linux-gnu/14.2.0/include-fixed
> >  /gnu/store/zvlp3n8iwa1svxmwv4q22pv1pb1c9pjq-glibc-2.39/include
> > End of search list.
> > # 0 "<stdin>"
> > # 0 "<built-in>"
> > # 0 "<command-line>"
> > # 1 "/home/lgatto/.guix-profile/include/stdc-predef.h" 1 3
> > # 0 "<command-line>" 2
> > # 1 "<stdin>"
> > ````
> >
> > Except for the version and location, all this looks very similar to
> > what you have, which leaves me quite puzzled.
>
> Indeed, this is strange.
>
> What does `guix package -I gcc` and `guix package -I stdc\+\+` give you?
> Maybe it'll show you some discrepancies.
>
> And if this is any help this is the commit I'm using for guix:
>
> ```
> $ guix describe
> Generation 142  nov 09 2024 12:47:04    (current)
> …
>   guix 14abf6e
>     repository URL: https://git.savannah.gnu.org/git/guix.git
>     branch: master
>     commit: 14abf6e19e5c24fa690a443f5467e7f0b6eafcc5
> ```
>
> Note: I removed the other channels I'm using and replaced them with `…`.
> None of them defines any gcc related packages so they should not affect
> this.
>
> --
> s/Fred[re]+i[ck]+/Fredrik/g