picolibc: Add config options

  meson,

  ninja,

  nix-update-script,

  pkgsCross,

  # General Build Options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L40-L57

  multilib ? true,

  sanitize-bounds ? false,

  sanitize-trap-on-error ? false,

  profile ? false,

  analyzer ? false,

  assert-verbose ? true,

  fast-strcmp ? true,

  # Testing options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L75

  picolib ? stdenv.hostPlatform.isNone,

  semihost ? stdenv.hostPlatform.isNone,

  # Stdio Options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L114

  tinystdio ? true,

  io-c99-formats ? true,

  io-long-long ? false,

  io-pos-args ? false,

  io-long-double ? false,

  # Tinystdio options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L129

  io-float-exact ? true,

  atomic-ungetc ? true,

  posix-console ? !stdenv.hostPlatform.isNone,

  format-default ? "double",

  printf-aliases ? true,

  io-percent-b ? false,

  printf-small-ultoa ? true,

  printf-percent-n ? false,

  minimal-io-long-long ? false,

  fast-bufio ? false,

  io-wchar ? false,

  # Internaltionalization options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L181

  mb-capable ? false,

  mb-extended-charsets ? false,

  mb-ucs-charsets ? "auto",

  mb-iso-charsets ? "auto",

  mb-jis-charsets ? "auto",

  mb-windows-charsets ? "auto",

  # Startup/shutdown options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L198

  picocrt ? stdenv.hostPlatform.isNone,

  picocrt-enable-mmu ? true,

  picocrt-lib ? true,

  picoexit ? true,

  initfini-array ? true,

  crt-runtime-size ? false,

  # Legacy (non-picoexit) startup/shutdown options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L217

  newlib-atexit-dynamic-alloc ? false,

  newlib-global-atexit ? !stdenv.hostPlatform.isNone,

  newlib-register-fini ? false,

  # Malloc options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L228

  newlib-nano-malloc ? true,

  nano-malloc-clear-freed ? false,

  # Locking options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L237

  single-thread ? false,

  # TLS storage options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L244

  thread-local-storage ? "picolibc",

  tls-model ? if stdenv.hostPlatform.isNone then "local-exec" else "global-dynamic",

  newlib-global-errno ? false,

  errno-function ? if stdenv.hostPlatform.isNone then "false" else "auto",

  tls-rp2040 ? false,

  # Math options

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/meson_options.txt#L261

  want-math-errno ? false,

}:

let

  inherit (lib.strings) mesonBool mesonOption;

  canExecute = stdenv.buildPlatform.canExecute stdenv.hostPlatform;

in

stdenv.mkDerivation (finalAttrs: {

  name = "picolibc";

  pname = "picolibc";

  version = "1.8.9";

  strictDeps = true;

  src = fetchFromGitHub {

    owner = "picolibc";

    repo = "picolibc";

    rev = "db4d0fe5952d5ecd714781e3212d4086d970735a";

    repo = finalAttrs.pname;

    tag = finalAttrs.version;

    hash = "sha256-W1zK9mLMfi5pbOpbSLxiB2qKdiyNjOSQu96NM94/fcY=";

  };

    ninja

  ];

  # Default values taken from

  # Build fails without using them.

  # https://github.com/picolibc/picolibc/blob/e57b766cb5d80f23c20d05ab067001d85910f927/doc/os.md?plain=1#L183

  mesonFlags = [

  mesonFlags =

    [

      (mesonBool "multilib" multilib)

    (mesonOption "specsdir" "${placeholder "dev"}/lib")

    (mesonOption "tls-model" "global-dynamic")

    (mesonOption "errno-function" "auto")

    (mesonBool "picolib" false)

    (mesonBool "picocrt" false)

    (mesonBool "semihost" false)

      (mesonBool "sanitize-bounds" sanitize-bounds)

      (mesonBool "sanitize-trap-on-error" sanitize-trap-on-error)

      (mesonBool "profile" profile)

      (mesonBool "analyzer" analyzer)

      (mesonBool "assert-verbose" assert-verbose)

      (mesonBool "fast-strcmp" fast-strcmp)

      # Testing options

      (mesonBool "picolib" picolib)

      (mesonBool "semihost" semihost)

      (mesonBool "use-stdlib" true)

    (mesonBool "posix-console" true)

    (mesonBool "newlib-global-atexit" true)

      # Install options

      (mesonOption "specsdir" "${placeholder "dev"}/lib")

      (mesonBool "tinystdio" tinystdio)

      (mesonBool "io-c99-formats" io-c99-formats)

      (mesonBool "io-long-long" io-long-long)

      (mesonBool "io-pos-args" io-pos-args)

      (mesonBool "io-long-double" io-long-double)

      (mesonBool "io-float-exact" io-float-exact)

      (mesonBool "atomic-ungetc" atomic-ungetc)

      (mesonBool "posix-console" posix-console)

      (mesonOption "format-default" format-default)

      (mesonBool "printf-aliases" printf-aliases)

      (mesonBool "io-percent-b" io-percent-b)

      (mesonBool "printf-small-ultoa" printf-small-ultoa)

      (mesonBool "printf-percent-n" printf-percent-n)

      (mesonBool "minimal-io-long-long" minimal-io-long-long)

      (mesonBool "fast-bufio" fast-bufio)

      (mesonBool "io-wchar" io-wchar)

      (mesonBool "mb-capable" mb-capable)

      (mesonBool "mb-extended-charsets" mb-extended-charsets)

      (mesonOption "mb-ucs-charsets" mb-ucs-charsets)

      (mesonOption "mb-iso-charsets" mb-iso-charsets)

      (mesonOption "mb-jis-charsets" mb-jis-charsets)

      (mesonOption "mb-windows-charsets" mb-windows-charsets)

      (mesonBool "picocrt" picocrt)

      (mesonBool "picocrt-enable-mmu" picocrt-enable-mmu)

      (mesonBool "picocrt-lib" picocrt-lib)

      (mesonBool "picoexit" picoexit)

      (mesonBool "newlib-initfini-array" initfini-array)

      (mesonBool "crt-runtime-size" crt-runtime-size)

      (mesonBool "newlib-atexit-dynamic-alloc" newlib-atexit-dynamic-alloc)

      (mesonBool "newlib-global-atexit" newlib-global-atexit)

      (mesonBool "newlib-register-fini" newlib-register-fini)

      (mesonBool "newlib-nano-malloc" newlib-nano-malloc)

      (mesonBool "nano-malloc-clear-freed" nano-malloc-clear-freed)

      (mesonBool "newlib-multithread" (!single-thread))

      (mesonOption "thread-local-storage" thread-local-storage)

      (mesonOption "tls-model" tls-model)

      (mesonBool "newlib-global-errno" newlib-global-errno)

      (mesonOption "errno-function" errno-function)

      (mesonBool "tls-rp2040" tls-rp2040)

      (mesonBool "want-math-errno" want-math-errno)

    ]

    ++ lib.optionals finalAttrs.doCheck [

      (mesonBool "tests" true)

      # Something is broken with this and I'm not sure what.

      (mesonOption "tests-cdefs" "false")

    ];

  doCheck = canExecute;

  passthru = {

    updateScript = nix-update-script { };

    tests = {