flake.nix

   1 {
   2   inputs = {
   3     nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
   4     flake-utils.url = "github:numtide/flake-utils";
   5     zig-overlay.url = "github:mitchellh/zig-overlay";
   6     #zig2nix.url = "github:Cloudef/zig2nix";
   7     #zig2nix.inputs.nixpkgs.follows = "nixpkgs";
   8   };
   9
  10   outputs = inputs:
  11     inputs.flake-utils.lib.eachSystem [ "x86_64-linux" ] (system:
  12       let
  13         pkgs = import inputs.nixpkgs { inherit system; };
  14         zig = pkgs.zig;
  15         #zig = inputs.zig-overlay.packages.${system}.master;
  16         # Wrap binary package zig on linux so /usr/bin/env can be found inside a sandbox
  17         zigBin =
  18           pkgs.writeScriptBin "zig" ''
  19             args=()
  20             for d in /*; do
  21               args+=("--dev-bind" "$d" "$d")
  22             done
  23             ${pkgs.bubblewrap}/bin/bwrap "''${args[@]}" \
  24               --bind ${pkgs.coreutils} /usr \
  25               -- ${pkgs.lib.getExe zig} "$@"
  26           '';
  27         postInstall = ''
  28           set -x
  29           readelf -d $out/bin/test-* | grep RUNPATH
  30           lddtree $out/bin/test-*
  31           set +x
  32         '';
  33       in
  34       {
  35         packages.test-zig = pkgs.stdenv.mkDerivation {
  36           name = "test-zig";
  37           src = ./.;
  38           buildInputs = [ zigBin pkgs.gsl pkgs.pkg-config pkgs.llvmPackages.bintools pkgs.pax-utils pkgs.binutils ];
  39           buildPhase = ''
  40             set -x
  41             export ZIG_GLOBAL_CACHE_DIR=$PWD
  42             mkdir -p $out/bin
  43             zig build-exe main.c -femit-bin=$out/bin/test-zig $(pkg-config --cflags --libs gsl)
  44             set +x
  45           '';
  46           inherit postInstall;
  47         };
  48         packages.test-gcc = pkgs.stdenv.mkDerivation {
  49           name = "test-gcc";
  50           src = ./.;
  51           buildInputs = [ pkgs.gsl pkgs.pkg-config pkgs.pax-utils pkgs.binutils ];
  52           buildPhase = ''
  53             set -x
  54             mkdir -p $out/bin
  55             gcc main.c -o $out/bin/test-gcc $(pkg-config --cflags --libs gsl)
  56             set +x
  57           '';
  58           inherit postInstall;
  59         };
  60         devShells.default = pkgs.mkShell {
  61           packages = [
  62             zig
  63             pkgs.gsl
  64             #pkgs.blas
  65             pkgs.pkg-config
  66           ];
  67         };
  68       });
  69 }