Hi Fredrik,
Excellent advice, and I was able to identify the culprit.
Here's a simple reproducible example
$ guix shell --container gcc-toolchain
[env]$ g++ main.cpp
[env]$ exit
$ guix shell --container gcc-toolchain gfortran-toolchain
[env]$ g++ main.cpp
In file included from
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/bits/move.h:57,
from
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/bits/exception_ptr.h:43,
from
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/exception:153,
from
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/ios:39,
from
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/ostream:38,
from
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/iostream:39,
from main.cpp:1:
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/type_traits:732:26:
error: expected identifier before '(' token
732 | _GLIBCXX20_DEPRECATED("use is_standard_layout &&
is_trivial instead")
| ^
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/type_traits:732:27:
error: expected unqualified-id before string constant
732 | _GLIBCXX20_DEPRECATED("use is_standard_layout &&
is_trivial instead")
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/type_traits:732:27:
error: expected ')' before string constant
732 | _GLIBCXX20_DEPRECATED("use is_standard_layout &&
is_trivial instead")
| ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| )
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/type_traits:3154:25:
error: expected unqualified-id before string constant
3154 | _GLIBCXX20_DEPRECATED("use is_standard_layout_v &&
is_trivial_v instead")
|
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/gnu/store/68l504nyvms77jzfg9yf4njiyfbi8gm2-profile/include/c++/type_traits:3154:25:
error: expected ')' before string constant
3154 | _GLIBCXX20_DEPRECATED("use is_standard_layout_v &&
is_trivial_v instead")
|
~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| )
I also confirmed that I was able to compile that source code by simply
commenting gfortran-toolchain in my system manifest.
Isn't this weird though? What if I need both?
Laurent
