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Several fixes for Nix build (#2389)

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* Fixed a bug for build via nix, when c3c-checks and c3c-debug didn't have a git hash

* Got rid of python3 requirement for checks in nix as it's no longer needed

* Now c3c properly displays it's build date in nix build

* Add more platforms for checks in nix build

* Add installation and compilation on Nix to README
This commit is contained in:
vssukharev
2025-08-11 20:21:41 +03:00
committed by GitHub
parent 0470f3be8e
commit 2597f6217e
3 changed files with 78 additions and 27 deletions
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40
README.md
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@@ -264,6 +264,38 @@ cd c3c-git
makepkg -si
```
#### Installing via Nix
You can access `c3c` via [flake.nix](./flake.nix), which will contain the latest commit of the compiler. To add `c3c` to your `flake.nix`, do the following:
```nix
{
inputs = {
nixpkgs.url = "github:nixos/nixpkgs?ref=nixpkgs-unstable";
flake-utils.url = "github:numtide/flake-utils";
c3c.url = "github:c3lang/c3c";
# Those are desired if you don't want to copy extra nixpkgs
c3c.inputs = {
nixpkgs.follows = "nixpkgs";
flake-utils.follows = "flake-utils";
};
};
outputs = { self, ... } @ inputs: inputs.flake-utils.lib.eachDefaultSystem (system:
let
pkgs = import inputs.nixpkgs { inherit system; };
c3c = inputs.c3c.packages.${system}.c3c;
in
{
devShells.default = pkgs.mkShell {
buildInputs = [
pkgs.c3c
];
};
}
);
}
```
#### Building via Docker
You can build `c3c` using an Ubuntu container. By default, the script will build through Ubuntu 22.04. You can specify the version by passing the `UBUNTU_VERSION` environment variable.
@@ -405,6 +437,14 @@ After compilation, the `c3c` binary will be located in the `build` directory. Yo
6. To install the compiler globally: `sudo cmake --install build`
#### Compiling on NixOS
1. Enter nix shell, by typing `nix develop` in root directory
2. Configure cmake via `cmake . -Bbuild $=C3_CMAKE_FLAGS`. Note: passing `C3_CMAKE_FLAGS` is needed in due to generate `compile_commands.json` and find missing libs.
4. Build it `cmake --build build`
5. Test it out: `./build/c3c -V`
6. If you use `clangd` lsp server for your editor, it is recommended to make a symbolic link to `compile_command.json` in the root: `ln -s ./build/compile_commands.json compile_commands.json`
#### Compiling on other Linux / Unix variants
1. Install CMake.