update nix/README.md

nix/README.md

@@ -0,0 +1,23 @@
+# Nix-compiled binaries for xrsh.iso
+
+Crosscompiling used to be tricky, due to dependencies.
+With Nix this belongs to the past.
+
+# building hello.c
+
+```bash
+$ nix-shell --run '$CC hello.c -o hello' hello.nix
+$ file hello 
+hello: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, not stripped
+```
+
+# building a nixos pkg
+
+```bash
+$ nix-build '<nixpkgs>' --pure -I nixpkgs=channel:nixos-24.05 -A pkgsCross.$ARCH.pkgsStatic.hello
+$ file hello
+hello: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, not stripped
+```
+
+use the build-shellscripts in this directory as a startingpoint for your xrsh binaries.
+

nix/chibicc.nix

@@ -1,23 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-
-pkgs.mkShell {
-  buildInputs = [
-    pkgs.pkg-config
-    pkgs.gnumake  # For running make
-    pkgs.gcc_multi # GCC with multi-lib support (32-bit and 64-bit)
-    pkgs.glibc_multi
-    pkgs.gccMultiStdenv
-    pkgs.binutils
-  ];
-
-  # Set up environment variables for cross-compilation to 32-bit
-  shellHook = ''
-    export CC="gcc -m32 -static"
-    export CXX="g++ -m32 -static"
-    export LD="ld -m elf_i386"
-    echo "32-bit cross-compilation environment with static linking is set up."
-    git clone https://github.com/rui314/chibicc
-    cd chibicc
-    make
-  '';
-}

nix/configuration.nix

@@ -1,43 +0,0 @@
-# /etc/nixos/configuration.nix
-{ config, pkgs, ... }:
-
-{
-  # Set the hostname of the system
-  networking.hostName = "nixos-minimal"; 
-
-  # Enable the OpenSSH service (optional, useful for remote access)
-  services.openssh.enable = false;
-
-  # Timezone configuration
-  time.timeZone = "UTC";
-
-  # Set the default shell to bash
-  users.defaultUserShell = pkgs.bash;
-
-  # Create a minimal user (replace "your-user" with desired username)
-  users.users.yourUser = {
-    isNormalUser = true;
-    shell = pkgs.bash;
-    initialPassword = "password";  # Replace with a hashed password for production
-  };
-
-  # Boot loader (for booting the system)
-  boot.loader.grub.enable = true;
-  boot.loader.grub.version = 2;
-  boot.loader.grub.devices = [ "/dev/sda" ]; # Replace with your actual boot device
-
-  # Allow unfree packages (if needed)
-  nixpkgs.config.allowUnfree = true;
-
-  # Enable virtual console
-  console.useXkbConfig = true;
-
-  # Enable bash as a package (part of the basic system environment)
-  environment.systemPackages = with pkgs; [
-    bash
-  ];
-
-  # Disable the display manager (minimal CLI system, no graphical interface)
-  services.xserver.enable = false;
-}
-

nix/cross.nix

@@ -1,12 +0,0 @@
-let
-  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/release-24.05";
-  pkgs = (import nixpkgs {}).pkgsCross.i686-embedded;
-in
-
-# callPackage is needed due to https://github.com/NixOS/nixpkgs/pull/126844
-pkgs.pkgsStatic.callPackage ({ mkShell, zlib, pkg-config, file }: mkShell {
-  # these tools run on the build platform, but are configured to target the host platform
-  nativeBuildInputs = [ pkg-config file ];
-  # libraries needed for the host platform
-  buildInputs = [ zlib ];
-}) {}

nix/howto.txt

@@ -1,3 +0,0 @@
-nix-shell --run gcc -m32 -static hello.c -o hello cross.nix
-nix-shell --run 'gcc -m32 -static hello.c -o hello' cross.nix
-nix-build '<nixpkgs>' -I nixpkgs=channel:nixos-24.05 -A pkgsCross.i686-embedded.hello --show-trace