From 71ed2bc003412b6509a377b38af43eae75275572 Mon Sep 17 00:00:00 2001
From: Lucy <lucy@c-base.org>
Date: Mon, 1 Sep 2025 18:37:12 +0200
Subject: [PATCH] init

---
 derivations/cross_toolchain/binutils.nix | 67 ++++++++++++++++++++++++
 flake.lock                               | 27 ++++++++++
 flake.nix                                | 38 ++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 derivations/cross_toolchain/binutils.nix
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/derivations/cross_toolchain/binutils.nix b/derivations/cross_toolchain/binutils.nix
new file mode 100644
index 0000000..5730521
--- /dev/null
+++ b/derivations/cross_toolchain/binutils.nix
@@ -0,0 +1,67 @@
+{ pkgs }:
+let
+  stdenv = pkgs.stdenv;
+
+  nativePackages = with pkgs; [
+    cmake
+    zlib
+    gnum4
+    bison
+  ];
+
+  binutilsPkg = stdenv.mkDerivation {
+    name = "binutils";
+    version = "2.45";
+
+    src = pkgs.fetchurl {
+      url = "https://sourceware.org/pub/${name}/releases/${name}-${version}.tar.xz";
+      hash = "";
+    };
+
+    nativeBuildInputs = [ nativePackages ];
+    buildInputs = [ ];
+
+    prePhases = "prepEnvironmentPhase";
+    prepEnvironmentPhase = ''
+      export LFS=$(pwd)
+      export LFSTOOLS=$(pwd)/tools
+      export LFS_TGT=$(uname -m)-lfs-linux-gnu
+      mkdir -v $LFSTOOLS
+    '';
+
+
+    # Using --prefix=$out instead of $LFS/tools.
+    configurePhase = ''
+      echo "Configuring... "
+      echo "Starting config"
+      time ( ./configure --prefix=$LFSTOOLS   \
+                      --with-sysroot=$LFS     \
+                      --target=$LFS_TGT       \
+                      --disable-nls           \
+                      --enable-gprofng=no     \
+                      --disable-werror        \
+                      --enable-new-dtags      \
+                      --enable-default-hash-style=gnu
+          )
+    '';
+
+    postInstall = ''
+      rm -r $LFS/$sourceRoot
+      cp -rvp $LFS/* $out/
+    '';
+
+    shellHook = ''
+      echo -e "\033[31mNix Develop -> $name: Loading...\033[0m"
+
+      if [[ "$(basename $(pwd))" != "$name" ]]; then
+          mkdir -p "$name"
+          cd "$name"
+      fi
+
+      eval "$prepEnvironmentPhase"
+      echo -e "\033[36mNix Develop -> $name: Loaded.\033[0m"
+      echo -e "\033[36mNix Develop -> Current directory: $(pwd)\033[0m"
+    '';
+  };
+in
+binutilsPkg
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..dade030
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1756542300,
+        "narHash": "sha256-tlOn88coG5fzdyqz6R93SQL5Gpq+m/DsWpekNFhqPQk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "d7600c775f877cd87b4f5a831c28aa94137377aa",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..cbc000d
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,38 @@
+{
+  description = "A very basic flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+      arch = "x86_64";
+      system = "${arch}-linux";
+      pkgs = import nixpkgs { inherit system; };
+
+      lib = pkgs.lib;
+
+      fs = lib.fileset;
+
+      # Cross Compilation Toolchain
+      binutilsStage = import ./derivations/cross_toolchain/binutils.nix { pkgs = pkgs; };
+    in
+    {
+      packages.${system}.crossToolchain = {
+        binutils = binutilsStage;
+      };
+
+      formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt-rfc-style;
+
+      devShells.x86_64-linux.default = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          git
+          nixfmt-rfc-style
+        ];
+        shellHook = ''
+          echo "Welcome to LucyOS Dev Env"
+        '';
+      };
+    };
+}