pa-06

.clang-format

@@ -0,0 +1 @@
+IndentWidth: 4

default.nix

@@ -1,23 +0,0 @@
-with import <nixpkgs> {}; let
-  let isDir
-  let pDirs = builtins.readDir ./.;
-  script1 = writeShellScriptBin "script1" ''
-    echo "Hello from script1"
-  '';
-
-  script2 = writeShellScriptBin "script2" ''
-    echo "Hello from script2"
-  '';
-in
-  stdenv.mkDerivation {
-    name = "all-scripts";
-    buildInputs = [
-      script1
-      script2
-    ];
-
-    # Or use buildEnv to create a combined package
-    buildCommand = ''
-      mkdir -p $out
-    '';
-  }

flake.nix

@@ -1,15 +0,0 @@
-{
-  description = "A very basic flake";
-
-  inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
-  };
-
-  outputs = { self, nixpkgs }: {
-
-    packages.x86_64-linux.hello = nixpkgs.legacyPackages.x86_64-linux.hello;
-
-    packages.x86_64-linux.default = self.packages.x86_64-linux.hello;
-
-  };
-}

pa-04/a1/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1763759067,
+        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1763835633,
+        "narHash": "sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu+MmzoVBJxulM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "050e09e091117c3d7328c7b2b7b577492c43c134",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1761765539,
+        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

pa-04/a1/flake.nix

@@ -0,0 +1,52 @@
+{
+  description = "Description for the project";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = inputs @ {flake-parts, ...}:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      imports = [
+        # To import an internal flake module: ./other.nix
+        # To import an external flake module:
+        #   1. Add foo to inputs
+        #   2. Add foo as a parameter to the outputs function
+        #   3. Add here: foo.flakeModule
+      ];
+      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
+      perSystem = {
+        config,
+        self',
+        inputs',
+        pkgs,
+        system,
+        ...
+      }: {
+        # Per-system attributes can be defined here. The self' and inputs'
+        # module parameters provide easy access to attributes of the same
+        # system.
+
+        packages.default = pkgs.stdenv.mkDerivation {
+          name = "a1";
+          src = ./.;
+          buildPhase = ''
+            cc main.c funktionen/*.c -o main.out
+          '';
+          installPhase = ''
+            mkdir -p $out/bin/
+            mv main.out $out/bin/
+          '';
+          meta = {
+            mainProgram = "main.out";
+          };
+        };
+      };
+      flake = {
+        # The usual flake attributes can be defined here, including system-
+        # agnostic ones like nixosModule and system-enumerating ones, although
+        # those are more easily expressed in perSystem.
+      };
+    };
+}

pa-04/a1/main.c

@@ -0,0 +1,9 @@
+#include <stdio.h>
+int main() {
+    printf("Der Datentyp char ist %d Byte lang.\n", sizeof(char));
+    printf("Der Datentyp int ist %d Byte lang.\n", sizeof(int));
+    printf("Der Datentyp long ist %d Byte lang.\n", sizeof(long));
+    printf("Der Datentyp float ist %d Byte lang.\n", sizeof(float));
+    printf("Der Datentyp double ist %d Byte lang.\n", sizeof(double));
+    return 0;
+}

pa-04/a2/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1763759067,
+        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1763835633,
+        "narHash": "sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu+MmzoVBJxulM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "050e09e091117c3d7328c7b2b7b577492c43c134",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1761765539,
+        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

pa-04/a2/flake.nix

@@ -0,0 +1,52 @@
+{
+  description = "Description for the project";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = inputs @ {flake-parts, ...}:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      imports = [
+        # To import an internal flake module: ./other.nix
+        # To import an external flake module:
+        #   1. Add foo to inputs
+        #   2. Add foo as a parameter to the outputs function
+        #   3. Add here: foo.flakeModule
+      ];
+      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
+      perSystem = {
+        config,
+        self',
+        inputs',
+        pkgs,
+        system,
+        ...
+      }: {
+        # Per-system attributes can be defined here. The self' and inputs'
+        # module parameters provide easy access to attributes of the same
+        # system.
+
+        packages.default = pkgs.stdenv.mkDerivation {
+          name = "a2";
+          src = ./.;
+          buildPhase = ''
+            cc main.c funktionen/*.c -o main.out
+          '';
+          installPhase = ''
+            mkdir -p $out/bin/
+            mv main.out $out/bin/
+          '';
+          meta = {
+            mainProgram = "main.out";
+          };
+        };
+      };
+      flake = {
+        # The usual flake attributes can be defined here, including system-
+        # agnostic ones like nixosModule and system-enumerating ones, although
+        # those are more easily expressed in perSystem.
+      };
+    };
+}

pa-04/a2/main.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <string.h>
+int main() {
+    char foo[4] = "foo";
+    char bar[4] = "bar";
+
+    printf("foo ist %d Zeichen lang\n", (int)strlen(foo));
+
+    printf("foo: %s \n", foo);
+    printf("bar: %s \n", bar);
+
+    char foobar[7];
+    strcpy(foobar, foo);
+    printf("foobar: %s \n", foobar);
+
+    strcat(foobar, bar);
+    printf("foo ++ bar -> foobar: %s \n", foobar);
+
+    if (strcmp(foo, bar) == 0) {
+        printf("foo = bar \n");
+    }
+    else {
+        printf("foo != bar \n");
+    }
+
+    return 0;
+}

pa-04/a3/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1763759067,
+        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1763835633,
+        "narHash": "sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu+MmzoVBJxulM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "050e09e091117c3d7328c7b2b7b577492c43c134",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1761765539,
+        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

pa-04/a3/flake.nix

@@ -0,0 +1,52 @@
+{
+  description = "Description for the project";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = inputs @ {flake-parts, ...}:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      imports = [
+        # To import an internal flake module: ./other.nix
+        # To import an external flake module:
+        #   1. Add foo to inputs
+        #   2. Add foo as a parameter to the outputs function
+        #   3. Add here: foo.flakeModule
+      ];
+      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
+      perSystem = {
+        config,
+        self',
+        inputs',
+        pkgs,
+        system,
+        ...
+      }: {
+        # Per-system attributes can be defined here. The self' and inputs'
+        # module parameters provide easy access to attributes of the same
+        # system.
+
+        packages.default = pkgs.stdenv.mkDerivation {
+          name = "a3";
+          src = ./.;
+          buildPhase = ''
+            cc main.c funktionen/*.c -o main.out
+          '';
+          installPhase = ''
+            mkdir -p $out/bin/
+            mv main.out $out/bin/
+          '';
+          meta = {
+            mainProgram = "main.out";
+          };
+        };
+      };
+      flake = {
+        # The usual flake attributes can be defined here, including system-
+        # agnostic ones like nixosModule and system-enumerating ones, although
+        # those are more easily expressed in perSystem.
+      };
+    };
+}

pa-04/a3/main.c

@@ -0,0 +1,9 @@
+#include <stdio.h>
+int main(int argc, char *argv[]) {
+  /* Schleife ueber alle Argumente */
+  for (int i = 0; i < argc; i++) {
+    /* Ausgabe zeilenweise */
+    printf("Argument %d: %s\n", i, argv[i]);
+  }
+  return 0;
+}

pa-04/a4/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1763759067,
+        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1763835633,
+        "narHash": "sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu+MmzoVBJxulM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "050e09e091117c3d7328c7b2b7b577492c43c134",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1761765539,
+        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

pa-04/a4/flake.nix

@@ -0,0 +1,52 @@
+{
+  description = "Description for the project";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = inputs @ {flake-parts, ...}:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      imports = [
+        # To import an internal flake module: ./other.nix
+        # To import an external flake module:
+        #   1. Add foo to inputs
+        #   2. Add foo as a parameter to the outputs function
+        #   3. Add here: foo.flakeModule
+      ];
+      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
+      perSystem = {
+        config,
+        self',
+        inputs',
+        pkgs,
+        system,
+        ...
+      }: {
+        # Per-system attributes can be defined here. The self' and inputs'
+        # module parameters provide easy access to attributes of the same
+        # system.
+
+        packages.default = pkgs.stdenv.mkDerivation {
+          name = "a4";
+          src = ./.;
+          buildPhase = ''
+            cc main.c funktionen/*.c -o main.out
+          '';
+          installPhase = ''
+            mkdir -p $out/bin/
+            mv main.out $out/bin/
+          '';
+          meta = {
+            mainProgram = "main.out";
+          };
+        };
+      };
+      flake = {
+        # The usual flake attributes can be defined here, including system-
+        # agnostic ones like nixosModule and system-enumerating ones, although
+        # those are more easily expressed in perSystem.
+      };
+    };
+}

pa-04/a4/main.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+int main(void) {
+  int a;
+  int *aptr;
+  char hello[] = "Hello, World!\n";
+  char *hptr;
+  a = 10;
+  aptr = &a;
+  printf("a: %d\n", *aptr);
+  hptr = hello + 7;
+  printf("%s\n", hptr);
+  while (*hptr) {
+    printf("%c ", *hptr++);
+  }
+  printf("\n");
+  return 0;
+}

pa-04/a5/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1763759067,
+        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1763835633,
+        "narHash": "sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu+MmzoVBJxulM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "050e09e091117c3d7328c7b2b7b577492c43c134",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1761765539,
+        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

pa-04/a5/flake.nix

@@ -0,0 +1,52 @@
+{
+  description = "Description for the project";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = inputs @ {flake-parts, ...}:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      imports = [
+        # To import an internal flake module: ./other.nix
+        # To import an external flake module:
+        #   1. Add foo to inputs
+        #   2. Add foo as a parameter to the outputs function
+        #   3. Add here: foo.flakeModule
+      ];
+      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
+      perSystem = {
+        config,
+        self',
+        inputs',
+        pkgs,
+        system,
+        ...
+      }: {
+        # Per-system attributes can be defined here. The self' and inputs'
+        # module parameters provide easy access to attributes of the same
+        # system.
+
+        packages.default = pkgs.stdenv.mkDerivation {
+          name = "a5";
+          src = ./.;
+          buildPhase = ''
+            cc main.c funktionen/*.c -o main.out
+          '';
+          installPhase = ''
+            mkdir -p $out/bin/
+            mv main.out $out/bin/
+          '';
+          meta = {
+            mainProgram = "main.out";
+          };
+        };
+      };
+      flake = {
+        # The usual flake attributes can be defined here, including system-
+        # agnostic ones like nixosModule and system-enumerating ones, although
+        # those are more easily expressed in perSystem.
+      };
+    };
+}

pa-04/a5/main.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+void funk(int *a) {
+    a[0] = 1;
+    a[1] = 2;
+    a[2] = 3;
+}
+int main() {
+    /* Vektor c deklarieren und Speicherplatz fuer 3 Elemente auf dem Stack
+     * reservieren */
+    int c[3];
+    /* Funktion funk aufrufen, funk speichert 3 Werte im Vektor c */
+    funk(c);
+    printf("c[0] = %d, c[1] = %d, c[2] = %d\n", c[0], c[1], c[2]);
+    return 0;
+}

pa-06/a2/a.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+#include <unistd.h>
+int main(void) {
+    printf("Guten Tag %d\n", fork());
+    return 0;
+}

pa-06/a2/b.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+#include <unistd.h>
+int main(void) {
+    printf("Guten %d Tag %d\n", fork(), fork());
+    return 0;
+}

pa-06/a2/c.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <unistd.h>
+int main(void) {
+    printf("Guten %d\n", fork());
+    printf("Tag %d\n", fork());
+    return 0;
+}

pa-06/a2/d.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <unistd.h>
+int main(void) {
+    int v1 = 0, v2 = 0, v3 = 0, pid;
+    pid = getpid();
+    v2++;
+    if (fork()) {
+        v1++;
+        v2++;
+        sleep(1);
+        if (fork()) {
+            v1++;
+            sleep(1);
+        }
+    }
+    if (pid == getppid()) {
+        v3++;
+    }
+    printf("%d %d %d\n", v1, v2, v3);
+    return 0;
+}

pa-06/a2/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1763759067,
+        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1763835633,
+        "narHash": "sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu+MmzoVBJxulM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "050e09e091117c3d7328c7b2b7b577492c43c134",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1761765539,
+        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

pa-06/a2/flake.nix

@@ -0,0 +1,60 @@
+{
+  description = "Description for the project";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = inputs @ {flake-parts, ...}:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      imports = [
+        # To import an internal flake module: ./other.nix
+        # To import an external flake module:
+        #   1. Add foo to inputs
+        #   2. Add foo as a parameter to the outputs function
+        #   3. Add here: foo.flakeModule
+      ];
+      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
+      perSystem = {
+        config,
+        self',
+        inputs',
+        pkgs,
+        system,
+        ...
+      }: {
+        # Per-system attributes can be defined here. The self' and inputs'
+        # module parameters provide easy access to attributes of the same
+        # system.
+
+        packages = let
+          mkTask = part:
+            pkgs.stdenv.mkDerivation {
+              name = "a1-${part}";
+              src = ./.;
+              buildPhase = ''
+                cc ${part}.c -o ${part}.out
+              '';
+              installPhase = ''
+                mkdir -p $out/bin/
+                mv ${part}.out $out/bin/
+              '';
+              meta = {
+                mainProgram = "${part}.out";
+              };
+            };
+        in {
+          a = mkTask "a";
+          b = mkTask "b";
+          c = mkTask "c";
+          d = mkTask "d";
+        };
+      };
+      flake = {
+        # The usual flake attributes can be defined here, including system-
+        # agnostic ones like nixosModule and system-enumerating ones, although
+        # those are more easily expressed in perSystem.
+      };
+    };
+}

shell.nix

@@ -3,6 +3,7 @@ with import <nixpkgs> {};
     packages = [
       gnumake
       libgcc
+      llvmPackages_20.clang-tools
       bsd-finger
     ];
     shellHook = ''