feat: musl boot

foundation/flake.nix

@@ -13,8 +13,9 @@
     modules = import ./src;
 
     forEachSystem = lib.attrs.generate [
-      "x86_64-linux"
-      "aarch64-linux"
+      # "x86_64-linux"
+      # "aarch64-linux"
+      "i686-linux"
       # "x86_64-darwin"
       # "aarch64-darwin"
     ];

foundation/src/builders/bash/boot.nix

@@ -0,0 +1,77 @@
+{
+  lib,
+  config,
+}: let
+  system = config.aux.system;
+  builders = config.aux.foundation.builders;
+
+  stage0 = config.aux.foundation.stages.stage0;
+  stage1 = config.aux.foundation.stages.stage1;
+in {
+  options.aux.foundation.builders.bash.boot = {
+    build = lib.options.create {
+      type = lib.types.function lib.types.package;
+      description = "Builds a package using the kaem builder.";
+    };
+  };
+
+  config = {
+    aux.foundation.builders.bash.boot = {
+      build = lib.modules.overrides.default (settings @ {
+        name,
+        script,
+        meta ? {},
+        extras ? {},
+        env ? {},
+        deps ? {},
+        ...
+      }: let
+        package = builtins.derivation (
+          (builtins.removeAttrs settings ["meta" "extras" "executable" "env" "deps" "script"])
+          // env
+          // {
+            inherit name system script;
+
+            passAsFile = ["script"];
+
+            builder = "${stage1.bash.boot.package}/bin/bash";
+
+            args = [
+              "-e"
+              (builtins.toFile "bash-builder.sh" ''
+                export CONFIG_SHELL=$SHELL
+
+                # Normalize the NIX_BUILD_CORES variable. The value might be 0, which
+                # means that we're supposed to try and auto-detect the number of
+                # available CPU cores at run-time. We don't have nproc to detect the
+                # number of available CPU cores so default to 1 if not set.
+                NIX_BUILD_CORES="''${NIX_BUILD_CORES:-1}"
+                if [ $NIX_BUILD_CORES -le 0 ]; then
+                  NIX_BUILD_CORES=1
+                fi
+                export NIX_BUILD_CORES
+
+                bash -eux $scriptPath
+              '')
+            ];
+
+            SHELL = "${stage1.bash.boot.package}/bin/bash";
+
+            PATH = lib.paths.bin (
+              (deps.build.host or [])
+              ++ [
+                stage1.bash.boot.package
+                stage1.coreutils.boot.package
+                stage0.mescc-tools-extra.package
+              ]
+            );
+          }
+        );
+      in
+        package
+        // {
+          inherit meta extras;
+        });
+    };
+  };
+}

foundation/src/builders/bash/default.nix

@@ -0,0 +1,22 @@
+{
+  lib,
+  config,
+}: let
+  system = config.aux.system;
+  builders = config.aux.foundation.builders;
+
+  stage0 = config.aux.foundation.stages.stage0;
+in {
+  includes = [
+    ./boot.nix
+  ];
+
+  options.aux.foundation.builders.bash = {
+    # TODO: Bash builder that isn't boot.
+  };
+
+  config = {
+    aux.foundation.builders.bash = {
+    };
+  };
+}

foundation/src/default.nix

@@ -1,5 +1,6 @@
 let
   modules = {
+    builderBash = builders/bash;
     builderFileText = ./builders/file/text;
     builderKaem = ./builders/kaem;
     builderRaw = ./builders/raw;

foundation/src/platform/default.nix

@@ -287,6 +287,11 @@
   };
 in {
   options.aux.platform = {
+    name = lib.options.create {
+      type = lib.types.string;
+      description = "Name of the platform";
+    };
+
     family = lib.options.create {
       type = lib.types.string;
       description = "Family of the platform";
@@ -314,11 +319,31 @@ in {
       default.value = null;
       description = "Version of the platform";
     };
+
+    build = lib.options.create {
+      type = lib.types.string;
+      description = "The build entry, such as x86-unknown-linux-gnu.";
+    };
+
+    host = lib.options.create {
+      type = lib.types.string;
+      description = "The host entry, such as x86-unknown-linux-gnu.";
+    };
   };
 
   config = {
     aux.platform =
-      platforms.${platform}
-      or (builtins.throw "Unsupported platform: ${system}");
+      (
+        platforms.${platform}
+        or (builtins.throw "Unsupported platform: ${system}")
+      )
+      // {
+        name = platform;
+
+        # These will only ever have `linux` as the target since we
+        # do not support darwin bootstrapping.
+        build = "${platform}-unknown-${target}-gnu";
+        host = "${platform}-unknown-${target}-gnu";
+      };
   };
 }

foundation/src/stages/stage0/phases/phase11.nix

@@ -114,18 +114,19 @@ in {
 
             executable = blood-elf.package;
 
-            args = [
+            args =
               (lib.lists.when (config.aux.platform.bits == 64) "--64")
-              "-f"
-              hex2_linker_M1
-              (
-                if config.aux.platform.endian == "little"
-                then "--little-endian"
-                else "--big-endian"
-              )
-              "-o"
-              (builtins.placeholder "out")
-            ];
+              ++ [
+                "-f"
+                hex2_linker_M1
+                (
+                  if config.aux.platform.endian == "little"
+                  then "--little-endian"
+                  else "--big-endian"
+                )
+                "-o"
+                (builtins.placeholder "out")
+              ];
           };
           hex2_linker_hex2 = builders.raw.build {
             pname = "hex2_linker_hex2";

foundation/src/stages/stage0/phases/phase12.nix

@@ -116,18 +116,19 @@ in {
 
             executable = blood-elf.package;
 
-            args = [
+            args =
               (lib.lists.when (config.aux.platform.bits == 64) "--64")
-              "-f"
-              kaem_M1
-              (
-                if config.aux.platform.endian == "little"
-                then "--little-endian"
-                else "--big-endian"
-              )
-              "-o"
-              (builtins.placeholder "out")
-            ];
+              ++ [
+                "-f"
+                kaem_M1
+                (
+                  if config.aux.platform.endian == "little"
+                  then "--little-endian"
+                  else "--big-endian"
+                )
+                "-o"
+                (builtins.placeholder "out")
+              ];
           };
           kaem_hex2 = builders.raw.build {
             pname = "kaem_hex2";

foundation/src/stages/stage1/default.nix

@@ -7,6 +7,7 @@
   stage1 = config.aux.foundation.stages.stage1;
 in {
   includes = [
+    # These packages are built using Kaem.
     ./nyacc
     ./mes
     ./ln-boot
@@ -15,6 +16,13 @@ in {
     ./gnumake
     ./coreutils
     ./bash
+
+    # These packages are built using Bash v2.
+    ./gnused
+    ./gnugrep
+    ./gnutar
+    ./gzip
+    ./musl
   ];
 
   config = {
@@ -33,6 +41,12 @@ in {
         stage1-gnumake = stage1.gnumake.package;
         stage1-coreutils-boot = stage1.coreutils.boot.package;
         stage1-bash-boot = stage1.bash.boot.package;
+
+        stage1-gnused-boot = stage1.gnused.boot.package;
+        stage1-gnugrep = stage1.gnugrep.package;
+        stage1-gnutar-boot = stage1.gnutar.boot.package;
+        stage1-gzip = stage1.gzip.package;
+        stage1-musl-boot = stage1.musl.boot.package;
       };
 
       extras = {

foundation/src/stages/stage1/gnugrep/default.nix

@@ -0,0 +1,106 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.gnugrep;
+
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.stage1;
+in {
+  options.aux.foundation.stages.stage1.gnugrep = {
+    package = lib.options.create {
+      type = lib.types.package;
+      description = "The package to use for gnugrep.";
+    };
+
+    version = lib.options.create {
+      type = lib.types.string;
+      description = "Version of the package.";
+    };
+
+    src = lib.options.create {
+      type = lib.types.package;
+      description = "Source for the package.";
+    };
+
+    meta = {
+      description = lib.options.create {
+        type = lib.types.string;
+        description = "Description for the package.";
+        default.value = "GNU implementation of the Unix grep command";
+      };
+
+      homepage = lib.options.create {
+        type = lib.types.string;
+        description = "Homepage for the package.";
+        default.value = "https://www.gnu.org/software/grep";
+      };
+
+      license = lib.options.create {
+        # TODO: Add a proper type for licenses.
+        type = lib.types.attrs.any;
+        description = "License for the package.";
+        default.value = lib.licenses.gpl3Plus;
+      };
+
+      platforms = lib.options.create {
+        type = lib.types.list.of lib.types.string;
+        description = "Platforms the package supports.";
+        default.value = ["x86_64-linux" "aarch64-linux" "i686-linux"];
+      };
+
+      mainProgram = lib.options.create {
+        type = lib.types.string;
+        description = "The main program of the package.";
+        default.value = "grep";
+      };
+    };
+  };
+
+  config = {
+    aux.foundation.stages.stage1.gnugrep = {
+      version = "2.4";
+
+      src = builtins.fetchurl {
+        url = "https://ftpmirror.gnu.org/grep/grep-${cfg.version}.tar.gz";
+        sha256 = "05iayw5sfclc476vpviz67hdy03na0pz2kb5csa50232nfx34853";
+      };
+
+      package = let
+        # Thanks to the live-bootstrap project!
+        # See https://github.com/fosslinux/live-bootstrap/blob/1bc4296091c51f53a5598050c8956d16e945b0f5/sysa/grep-2.4
+        makefile = builtins.fetchurl {
+          url = "https://github.com/fosslinux/live-bootstrap/raw/1bc4296091c51f53a5598050c8956d16e945b0f5/sysa/grep-2.4/mk/main.mk";
+          sha256 = "08an9ljlqry3p15w28hahm6swnd3jxizsd2188przvvsj093j91k";
+        };
+      in
+        builders.bash.boot.build {
+          name = "gnused-boot-${cfg.version}";
+          meta = cfg.meta;
+
+          deps.build.host = [
+            stage1.tinycc.mes.compiler.package
+            stage1.gnumake.package
+          ];
+
+          script = ''
+            # Unpack
+            ungz --file ${cfg.src} --output grep.tar
+            untar --file grep.tar
+            rm grep.tar
+            cd grep-${cfg.version}
+
+            # Configure
+            cp ${makefile} Makefile
+
+            # Build
+            make CC="tcc -B ${stage1.tinycc.mes.libs.package}/lib"
+
+            # Install
+            make install PREFIX=$out
+          '';
+        };
+    };
+  };
+}

foundation/src/stages/stage1/gnused/boot.nix

@@ -0,0 +1,77 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.gnused.boot;
+
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.stage1;
+in {
+  options.aux.foundation.stages.stage1.gnused.boot = {
+    package = lib.options.create {
+      type = lib.types.package;
+      description = "The package to use for gnused-boot.";
+    };
+
+    version = lib.options.create {
+      type = lib.types.string;
+      description = "Version of the package.";
+    };
+
+    src = lib.options.create {
+      type = lib.types.package;
+      description = "Source for the package.";
+    };
+  };
+
+  config = {
+    aux.foundation.stages.stage1.gnused.boot = {
+      version = "4.0.9";
+
+      src = builtins.fetchurl {
+        url = "https://ftpmirror.gnu.org/sed/sed-${cfg.version}.tar.gz";
+        sha256 = "0006gk1dw2582xsvgx6y6rzs9zw8b36rhafjwm288zqqji3qfrf3";
+      };
+
+      package = let
+        # Thanks to the live-bootstrap project!
+        # See https://github.com/fosslinux/live-bootstrap/blob/1bc4296091c51f53a5598050c8956d16e945b0f5/sysa/sed-4.0.9/sed-4.0.9.kaem
+        makefile = builtins.fetchurl {
+          url = "https://github.com/fosslinux/live-bootstrap/raw/1bc4296091c51f53a5598050c8956d16e945b0f5/sysa/sed-4.0.9/mk/main.mk";
+          sha256 = "0w1f5ri0g5zla31m6l6xyzbqwdvandqfnzrsw90dd6ak126w3mya";
+        };
+      in
+        builders.bash.boot.build {
+          name = "gnused-boot-${cfg.version}";
+
+          meta = stage1.gnused.meta;
+
+          deps.build.host = [
+            stage1.tinycc.mes.compiler.package
+            stage1.gnumake.package
+          ];
+
+          script = ''
+            # Unpack
+            ungz --file ${cfg.src} --output sed.tar
+            untar --file sed.tar
+            rm sed.tar
+            cd sed-${cfg.version}
+
+            # Configure
+            cp ${makefile} Makefile
+            catm config.h
+
+            # Build
+            make \
+              CC="tcc -B ${stage1.tinycc.mes.libs.package}/lib" \
+              LIBC=mes
+
+            # Install
+            make install PREFIX=$out
+          '';
+        };
+    };
+  };
+}

foundation/src/stages/stage1/gnused/default.nix

@@ -0,0 +1,49 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.gnused;
+
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.gnused;
+in {
+  includes = [
+    ./boot.nix
+  ];
+
+  options.aux.foundation.stages.stage1.gnused = {
+    meta = {
+      description = lib.options.create {
+        type = lib.types.string;
+        description = "Description for the package.";
+        default.value = "GNU sed, a batch stream editor.";
+      };
+
+      homepage = lib.options.create {
+        type = lib.types.string;
+        description = "Homepage for the package.";
+        default.value = "https://www.gnu.org/software/sed";
+      };
+
+      license = lib.options.create {
+        # TODO: Add a proper type for licenses.
+        type = lib.types.attrs.any;
+        description = "License for the package.";
+        default.value = lib.licenses.gpl3Plus;
+      };
+
+      platforms = lib.options.create {
+        type = lib.types.list.of lib.types.string;
+        description = "Platforms the package supports.";
+        default.value = ["x86_64-linux" "aarch64-linux" "i686-linux"];
+      };
+
+      mainProgram = lib.options.create {
+        type = lib.types.string;
+        description = "The main program of the package.";
+        default.value = "sed";
+      };
+    };
+  };
+}

foundation/src/stages/stage1/gnutar/boot.nix

@@ -0,0 +1,76 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.gnutar.boot;
+
+  platform = config.aux.platform;
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.stage1;
+in {
+  options.aux.foundation.stages.stage1.gnutar.boot = {
+    package = lib.options.create {
+      type = lib.types.package;
+      description = "The package to use for gnutar-boot.";
+    };
+
+    version = lib.options.create {
+      type = lib.types.string;
+      description = "Version of the package.";
+    };
+
+    src = lib.options.create {
+      type = lib.types.package;
+      description = "Source for the package.";
+    };
+  };
+
+  config = {
+    aux.foundation.stages.stage1.gnutar.boot = {
+      version = "1.12";
+
+      src = builtins.fetchurl {
+        url = "https://ftpmirror.gnu.org/tar/tar-${cfg.version}.tar.gz";
+        sha256 = "02m6gajm647n8l9a5bnld6fnbgdpyi4i3i83p7xcwv0kif47xhy6";
+      };
+
+      package = let
+      in
+        builders.bash.boot.build {
+          name = "gnutar-boot-${cfg.version}";
+
+          meta = stage1.gnutar.meta;
+
+          deps.build.host = [
+            stage1.tinycc.mes.compiler.package
+            stage1.gnumake.package
+            stage1.gnused.boot.package
+            stage1.gnugrep.package
+          ];
+
+          script = ''
+            # Unpack
+            ungz --file ${cfg.src} --output tar.tar
+            untar --file tar.tar
+            rm tar.tar
+            cd tar-${cfg.version}
+
+            # Configure
+            export CC="tcc -B ${stage1.tinycc.mes.libs.package}/lib"
+            bash ./configure \
+              --build=${platform.build} \
+              --host=${platform.host} \
+              --disable-nls \
+              --prefix=$out
+
+            # Build
+            make AR="tcc -ar"
+
+            # Install
+            make install
+          '';
+        };
+    };
+  };
+}

foundation/src/stages/stage1/gnutar/default.nix

@@ -0,0 +1,49 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.gnutar;
+
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.gnutar;
+in {
+  includes = [
+    ./boot.nix
+  ];
+
+  options.aux.foundation.stages.stage1.gnutar = {
+    meta = {
+      description = lib.options.create {
+        type = lib.types.string;
+        description = "Description for the package.";
+        default.value = "GNU implementation of the `tar' archiver";
+      };
+
+      homepage = lib.options.create {
+        type = lib.types.string;
+        description = "Homepage for the package.";
+        default.value = "https://www.gnu.org/software/tar";
+      };
+
+      license = lib.options.create {
+        # TODO: Add a proper type for licenses.
+        type = lib.types.attrs.any;
+        description = "License for the package.";
+        default.value = lib.licenses.gpl3Plus;
+      };
+
+      platforms = lib.options.create {
+        type = lib.types.list.of lib.types.string;
+        description = "Platforms the package supports.";
+        default.value = ["x86_64-linux" "aarch64-linux" "i686-linux"];
+      };
+
+      mainProgram = lib.options.create {
+        type = lib.types.string;
+        description = "The main program of the package.";
+        default.value = "tar";
+      };
+    };
+  };
+}

foundation/src/stages/stage1/gzip/default.nix

@@ -0,0 +1,104 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.gzip;
+
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.stage1;
+in {
+  options.aux.foundation.stages.stage1.gzip = {
+    package = lib.options.create {
+      type = lib.types.package;
+      description = "The package to use for gnugrep.";
+    };
+
+    version = lib.options.create {
+      type = lib.types.string;
+      description = "Version of the package.";
+    };
+
+    src = lib.options.create {
+      type = lib.types.package;
+      description = "Source for the package.";
+    };
+
+    meta = {
+      description = lib.options.create {
+        type = lib.types.string;
+        description = "Description for the package.";
+        default.value = "GNU implementation of the Unix grep command";
+      };
+
+      homepage = lib.options.create {
+        type = lib.types.string;
+        description = "Homepage for the package.";
+        default.value = "https://www.gnu.org/software/grep";
+      };
+
+      license = lib.options.create {
+        # TODO: Add a proper type for licenses.
+        type = lib.types.attrs.any;
+        description = "License for the package.";
+        default.value = lib.licenses.gpl3Plus;
+      };
+
+      platforms = lib.options.create {
+        type = lib.types.list.of lib.types.string;
+        description = "Platforms the package supports.";
+        default.value = ["x86_64-linux" "aarch64-linux" "i686-linux"];
+      };
+
+      mainProgram = lib.options.create {
+        type = lib.types.string;
+        description = "The main program of the package.";
+        default.value = "grep";
+      };
+    };
+  };
+
+  config = {
+    aux.foundation.stages.stage1.gzip = {
+      version = "1.2.4";
+
+      src = builtins.fetchurl {
+        url = "https://ftpmirror.gnu.org/gzip/gzip-${cfg.version}.tar.gz";
+        sha256 = "0ryr5b00qz3xcdcv03qwjdfji8pasp0007ay3ppmk71wl8c1i90w";
+      };
+
+      package = let
+      in
+        builders.bash.boot.build {
+          name = "gnused-boot-${cfg.version}";
+          meta = cfg.meta;
+
+          deps.build.host = [
+            stage1.tinycc.mes.compiler.package
+            stage1.gnumake.package
+            stage1.gnused.boot.package
+            stage1.gnugrep.package
+          ];
+
+          script = ''
+            # Unpack
+            ungz --file ${cfg.src} --output gzip.tar
+            untar --file gzip.tar
+            rm gzip.tar
+            cd gzip-${cfg.version}
+
+            # Configure
+            export CC="tcc -B ${stage1.tinycc.mes.libs.package}/lib -Dstrlwr=unused"
+            bash ./configure --prefix=$out
+
+            # Build
+            make
+
+            # Install
+            mkdir $out
+            make install
+          '';
+        };
+    };
+  };
+}

foundation/src/stages/stage1/musl/boot.nix

@@ -0,0 +1,139 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.musl.boot;
+
+  platform = config.aux.platform;
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.stage1;
+in {
+  options.aux.foundation.stages.stage1.musl.boot = {
+    package = lib.options.create {
+      type = lib.types.package;
+      description = "The package to use for musl-boot.";
+    };
+
+    version = lib.options.create {
+      type = lib.types.string;
+      description = "Version of the package.";
+    };
+
+    src = lib.options.create {
+      type = lib.types.package;
+      description = "Source for the package.";
+    };
+  };
+
+  config = {
+    aux.foundation.stages.stage1.musl.boot = {
+      version = "1.1.24";
+
+      src = builtins.fetchurl {
+        url = "https://musl.libc.org/releases/musl-${cfg.version}.tar.gz";
+        sha256 = "E3DJqBKyzyp9koAlEMygBYzDfmanvt1wBR8KNAFQIqM=";
+      };
+
+      package = let
+        # Thanks to the live-bootstrap project!
+        # See https://github.com/fosslinux/live-bootstrap/blob/d98f97e21413efc32c770d0356f1feda66025686/sysa/musl-1.1.24/musl-1.1.24.sh
+        liveBootstrap = "https://github.com/fosslinux/live-bootstrap/raw/d98f97e21413efc32c770d0356f1feda66025686/sysa/musl-1.1.24";
+        patches = [
+          (builtins.fetchurl {
+            url = "${liveBootstrap}/patches/avoid_set_thread_area.patch";
+            sha256 = "TsbBZXk4/KMZG9EKi7cF+sullVXrxlizLNH0UHGXsPs=";
+          })
+          (builtins.fetchurl {
+            url = "${liveBootstrap}/patches/avoid_sys_clone.patch";
+            sha256 = "/ZmH64J57MmbxdfQ4RNjamAiBdkImMTlHsHdgV4gMj4=";
+          })
+          (builtins.fetchurl {
+            url = "${liveBootstrap}/patches/fenv.patch";
+            sha256 = "vMVGjoN4deAJW5gsSqA207SJqAbvhrnOsGK49DdEiTI=";
+          })
+          (builtins.fetchurl {
+            url = "${liveBootstrap}/patches/makefile.patch";
+            sha256 = "03iYBAUnsrEdLIIhhhq5mM6BGnPn2EfUmIHu51opxbw=";
+          })
+          (builtins.fetchurl {
+            url = "${liveBootstrap}/patches/musl_weak_symbols.patch";
+            sha256 = "/d9a2eUkpe9uyi1ye6T4CiYc9MR3FZ9na0Gb90+g4v0=";
+          })
+          (builtins.fetchurl {
+            url = "${liveBootstrap}/patches/set_thread_area.patch";
+            sha256 = "RIZYqbbRSx4X/0iFUhriwwBRmoXVR295GNBUjf2UrM0=";
+          })
+          (builtins.fetchurl {
+            url = "${liveBootstrap}/patches/sigsetjmp.patch";
+            sha256 = "wd2Aev1zPJXy3q933aiup5p1IMKzVJBquAyl3gbK4PU=";
+          })
+          # FIXME: this patch causes the build to fail
+          # (builtins.fetchurl {
+          #   url = "${liveBootstrap}/patches/stdio_flush_on_exit.patch";
+          #   sha256 = "/z5ze3h3QTysay8nRvyvwPv3pmTcKptdkBIaMCoeLDg=";
+          # })
+          # HACK: always flush stdio immediately
+          ./patches/always-flush.patch
+          (builtins.fetchurl {
+            url = "${liveBootstrap}/patches/va_list.patch";
+            sha256 = "UmcMIl+YCi3wIeVvjbsCyqFlkyYsM4ECNwTfXP+s7vg=";
+          })
+        ];
+      in
+        builders.bash.boot.build {
+          name = "musl-boot-${cfg.version}";
+
+          meta = stage1.musl.meta;
+
+          deps.build.host = [
+            stage1.tinycc.mes.compiler.package
+            stage1.gnumake.package
+            stage1.gnused.boot.package
+            stage1.gnugrep.package
+            stage1.gnupatch.package
+            stage1.gnutar.boot.package
+            stage1.gzip.package
+          ];
+
+          script = ''
+            # Unpack
+            tar xzf ${cfg.src}
+            cd musl-${cfg.version}
+
+            # Patch
+            ${lib.strings.concatMapSep "\n" (file: "patch -Np0 -i ${file}") patches}
+            # tcc does not support complex types
+            rm -rf src/complex
+            # Configure fails without this
+            mkdir -p /dev
+            # https://github.com/ZilchOS/bootstrap-from-tcc/blob/2e0c68c36b3437386f786d619bc9a16177f2e149/using-nix/2a3-intermediate-musl.nix
+            sed -i 's|/bin/sh|${stage1.bash.boot.package}/bin/bash|' \
+              tools/*.sh
+            chmod 755 tools/*.sh
+            # patch popen/system to search in PATH instead of hardcoding /bin/sh
+            sed -i 's|posix_spawn(&pid, "/bin/sh",|posix_spawnp(\&pid, "sh",|' \
+              src/stdio/popen.c src/process/system.c
+            sed -i 's|execl("/bin/sh", "sh", "-c",|execlp("sh", "-c",|'\
+              src/misc/wordexp.c
+
+            # Configure
+            bash ./configure \
+              --prefix=$out \
+              --build=${(builtins.trace platform.build) platform.build} \
+              --host=${platform.host} \
+              --disable-shared \
+              CC=tcc
+
+            # Build
+            make AR="tcc -ar" RANLIB=true CFLAGS="-DSYSCALL_NO_TLS"
+
+            # Install
+            make install
+            cp ${stage1.tinycc.mes.libs.package}/lib/libtcc1.a $out/lib
+
+          '';
+        };
+    };
+  };
+}

foundation/src/stages/stage1/musl/default.nix

@@ -0,0 +1,44 @@
+{
+  lib,
+  config,
+}: let
+  cfg = config.aux.foundation.stages.stage1.musl;
+
+  builders = config.aux.foundation.builders;
+
+  stage1 = config.aux.foundation.stages.musl;
+in {
+  includes = [
+    ./boot.nix
+  ];
+
+  options.aux.foundation.stages.stage1.musl = {
+    meta = {
+      description = lib.options.create {
+        type = lib.types.string;
+        description = "Description for the package.";
+        default.value = "An efficient, small, quality libc implementation";
+      };
+
+      homepage = lib.options.create {
+        type = lib.types.string;
+        description = "Homepage for the package.";
+        default.value = "https://musl.libc.org";
+      };
+
+      license = lib.options.create {
+        # TODO: Add a proper type for licenses.
+        type = lib.types.attrs.any;
+        description = "License for the package.";
+        default.value = lib.licenses.mit;
+      };
+
+      platforms = lib.options.create {
+        type = lib.types.list.of lib.types.string;
+        description = "Platforms the package supports.";
+        # TODO: Support more platforms.
+        default.value = ["i686-linux"];
+      };
+    };
+  };
+}

foundation/src/stages/stage1/musl/patches/always-flush.patch

@@ -0,0 +1,13 @@
+diff --git src/env/__libc_start_main.c src/env/__libc_start_main.c
+index 8fbe526..9476c22 100644
+--- src/env/__libc_start_main.c
++++ src/env/__libc_start_main.c
+@@ -91,6 +91,7 @@ static int libc_start_main_stage2(int (*main)(int,char **,char **), int argc, ch
+ 	__libc_start_init();
+ 
+ 	/* Pass control to the application */
++	setbuf(stdout, NULL);
+ 	exit(main(argc, argv, envp));
+ 	return 0;
+ }
+

foundation/src/system/default.nix

@@ -2,7 +2,7 @@
   options.aux = {
     system = lib.options.create {
       type = lib.types.string;
-      default.value = "x86_64-linux";
+      default.value = "i686-linux";
       description = ''
         The system to build packages for. This value can be provided as either
         `config.aux.system` or by setting the `system` argument for modules.