28 lines
761 B
Nix
28 lines
761 B
Nix
{ config, lib, libS, ... }:
|
|
|
|
let
|
|
cfg = config.simd;
|
|
in
|
|
{
|
|
options.simd = {
|
|
enable = lib.mkEnableOption "optimized builds with simd instructions";
|
|
arch = lib.mkOption {
|
|
type = with lib.types; nullOr str;
|
|
default = null;
|
|
description = ''
|
|
Microarchitecture string for nixpkgs.hostPlatform.gcc.march and to generate system-features.
|
|
Can be determined with: ``nix shell nixpkgs#gcc -c gcc -march=native -Q --help=target | grep march``
|
|
'';
|
|
};
|
|
};
|
|
|
|
config = {
|
|
nix.settings.system-features = lib.mkIf (cfg.arch != null) (libS.nix.gcc-system-features config.simd.arch);
|
|
|
|
nixpkgs.hostPlatform = lib.mkIf cfg.enable {
|
|
gcc.arch = config.simd.arch;
|
|
inherit (config.nixpkgs) system;
|
|
};
|
|
};
|
|
}
|