nixos-riscv/no-compressed.nix

{ config, lib, pkgs, modulesPath, ... }:

{
  nixpkgs.crossSystem = {
    system = "riscv64-linux";
    gcc.arch = "rv64g";
    gcc.tune = "rv64g";
  };

  # FIXME: Broken as rustc injects compressed instructions.
  # For now we disable it.
  services.nscd.enableNsncd = false;

  boot.kernelPatches = [ {
    name = "disable-compressed";
    patch = null;
    extraConfig = ''
      RISCV_ISA_C n
      NONPORTABLE y
      EFI n
    '';
  } ];

  nixpkgs.overlays = [
    (final: prev: {
      # Fix GCC 13 format-overflow warning/error:
      # ../src/shared/install.c:444:64: error: ‘%s’ directive argument is null [-Werror=format-overflow=]
      # 444 |                         err = log_error_errno(changes[i].type, "Failed to %s unit, unit %s does not exist.",
      #     |                                                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      systemd = prev.systemd.overrideAttrs (old: {
        CFLAGS = "-Wno-error=format-overflow";
      });
    })
  ];
}