Add Makefile and Nix build environment

Signed-off-by: Mel <mel@rnrd.eu>

5 files changed, 121 insertions, 0 deletions

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..197c0d5
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+use flake
diff --git a/.gitignore b/.gitignore
index 567609b..eb0b272 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 build/
+.direnv/
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..7099164
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,25 @@
+CFLAGS ?= -Wall -Werror -static -g -Og
+.DEFAULT_GOAL := all
+
+build/catskill: build src/catskill.csk
+	echo "No catskill compiler exists yet. Building empty file."
+	touch ./build/catskill
+
+build/catboot: build boot/catboot.c
+	$(CC) $(CFLAGS) -o ./build/catboot ./boot/catboot.c
+
+build:
+	mkdir -p ./build
+
+.PHONY: all run run-boot clean
+
+all: build/catskill build/catboot
+
+run: build/catskill
+	echo "Not implemented yet."
+
+run-boot: build/catboot
+	./build/catboot
+
+clean:
+	rm -rf build/*
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..dfa8cf6
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1739580444,
+        "narHash": "sha256-+/bSz4EAVbqz8/HsIGLroF8aNaO8bLRL7WfACN+24g4=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "8bb37161a0488b89830168b81c48aed11569cb93",
+        "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..9021e96
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,65 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    { self, nixpkgs }:
+    let
+      systems = [
+        "x86_64-linux"
+        "x86_64-darwin"
+        "aarch64-linux"
+        "aarch64-darwin"
+        "riscv64-linux"
+      ];
+
+      eachSystem =
+        f:
+        nixpkgs.lib.genAttrs systems (
+          system:
+          f {
+            inherit system;
+            pkgs = import nixpkgs { inherit system; };
+          }
+        );
+    in
+    {
+      devShells = eachSystem (
+        { system, pkgs }:
+        with pkgs;
+        let
+          stdenv = llvmPackages.stdenv;
+          shell = mkShell.override { inherit stdenv; };
+
+          musl-src = runCommand "musl-src" { } ''
+            mkdir $out
+            tar -xf ${musl.src} -C $out
+          '';
+
+          musl-static = musl.overrideAttrs (attrs: {
+            # this HAS the be fixed in upstream nixpkgs one day, right?
+            CFLAGS = attrs.CFLAGS ++ [
+              "-fdebug-prefix-map=/build=${musl-src}"
+            ];
+            seperateDebugInfo = false;
+            dontStrip = true;
+          });
+        in
+        {
+          default = shell {
+            buildInputs = [
+              musl-static
+            ];
+
+            nativeBuildInputs = [
+              pkg-config
+              gnumake
+              lldb
+              llvmPackages.bintools
+            ];
+          };
+        }
+      );
+    };
+}