Hello Guix,
I have been trying to setup a C++ development environment in Guix,
however clangd has been very annoying.
The simple hello world in C++
```
#include <iostream>
int main() {
std::cout << "Hello World";
}
```
Has clangd (in Emacs) complaining about the <iostream> line that,
`clang: [unknown-typename] in included file: unknown type name
_GLIBCXX23_CONSTEXPR`,
followed by it supposedly quitting due to too many errors (it doesn't
actually quit).
Here is the compile_commands.json generated by cmake
```
[
{
"directory": "/home/hikari/opt/cpp/calc/build",
"command":
"/gnu/store/l10q8ps24x4d9fdxl3iwpsg5xfs9kgnz-profile/bin/c++
-std=gnu++20 -o CMakeFiles/calc.dir/src/main.cpp.o -c
/home/hikari/opt/cpp/calc/src/main.cpp",
"file": "/home/hikari/opt/cpp/calc/src/main.cpp",
"output": "CMakeFiles/calc.dir/src/main.cpp.o"
}
]⏎
```
And the shell environment I am using
```
(specifications->manifest
(list "gcc-toolchain"
"cmake"
"clang"
"gdb"
"direnv"
"bash"
"coreutils"
"util-linux"
"git"
"make"))
```
Swapping gcc-toolchain out with clang-toolchain and regenerating the
compile_commands.json doesn't do anything either. Any ideas?
