compiler/rustc_session/src/options.rs

   1 use crate::config::*;
   2
   3 use crate::early_error;
   4 use crate::lint;
   5 use crate::search_paths::SearchPath;
   6 use crate::utils::NativeLibKind;
   7
   8 use rustc_target::spec::{CodeModel, LinkerFlavor, MergeFunctions, PanicStrategy};
   9 use rustc_target::spec::{RelocModel, RelroLevel, SplitDebuginfo, TargetTriple, TlsModel};
  10
  11 use rustc_feature::UnstableFeatures;
  12 use rustc_span::edition::Edition;
  13 use rustc_span::SourceFileHashAlgorithm;
  14
  15 use std::collections::BTreeMap;
  16
  17 use std::collections::hash_map::DefaultHasher;
  18 use std::hash::Hasher;
  19 use std::path::PathBuf;
  20 use std::str;
  21
  22 macro_rules! hash_option {
  23     ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, [UNTRACKED]) => {{}};
  24     ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, [TRACKED]) => {{
  25         if $sub_hashes
  26             .insert(stringify!($opt_name), $opt_expr as &dyn dep_tracking::DepTrackingHash)
  27             .is_some()
  28         {
  29             panic!("duplicate key in CLI DepTrackingHash: {}", stringify!($opt_name))
  30         }
  31     }};
  32 }
  33
  34 macro_rules! top_level_options {
  35     (pub struct Options { $(
  36         $opt:ident : $t:ty [$dep_tracking_marker:ident $($warn_val:expr, $warn_text:expr)*],
  37     )* } ) => (
  38         #[derive(Clone)]
  39         pub struct Options {
  40             $(pub $opt: $t),*
  41         }
  42
  43         impl Options {
  44             pub fn dep_tracking_hash(&self) -> u64 {
  45                 let mut sub_hashes = BTreeMap::new();
  46                 $({
  47                     hash_option!($opt,
  48                                  &self.$opt,
  49                                  &mut sub_hashes,
  50                                  [$dep_tracking_marker $($warn_val,
  51                                                          $warn_text,
  52                                                          self.error_format)*]);
  53                 })*
  54                 let mut hasher = DefaultHasher::new();
  55                 dep_tracking::stable_hash(sub_hashes,
  56                                           &mut hasher,
  57                                           self.error_format);
  58                 hasher.finish()
  59             }
  60         }
  61     );
  62 }
  63
  64 // The top-level command-line options struct.
  65 //
  66 // For each option, one has to specify how it behaves with regard to the
  67 // dependency tracking system of incremental compilation. This is done via the
  68 // square-bracketed directive after the field type. The options are:
  69 //
  70 // [TRACKED]
  71 // A change in the given field will cause the compiler to completely clear the
  72 // incremental compilation cache before proceeding.
  73 //
  74 // [UNTRACKED]
  75 // Incremental compilation is not influenced by this option.
  76 //
  77 // If you add a new option to this struct or one of the sub-structs like
  78 // `CodegenOptions`, think about how it influences incremental compilation. If in
  79 // doubt, specify [TRACKED], which is always "correct" but might lead to
  80 // unnecessary re-compilation.
  81 top_level_options!(
  82     pub struct Options {
  83         // The crate config requested for the session, which may be combined
  84         // with additional crate configurations during the compile process.
  85         crate_types: Vec<CrateType> [TRACKED],
  86         optimize: OptLevel [TRACKED],
  87         // Include the `debug_assertions` flag in dependency tracking, since it
  88         // can influence whether overflow checks are done or not.
  89         debug_assertions: bool [TRACKED],
  90         debuginfo: DebugInfo [TRACKED],
  91         lint_opts: Vec<(String, lint::Level)> [TRACKED],
  92         lint_cap: Option<lint::Level> [TRACKED],
  93         describe_lints: bool [UNTRACKED],
  94         output_types: OutputTypes [TRACKED],
  95         search_paths: Vec<SearchPath> [UNTRACKED],
  96         libs: Vec<(String, Option<String>, NativeLibKind)> [TRACKED],
  97         maybe_sysroot: Option<PathBuf> [UNTRACKED],
  98
  99         target_triple: TargetTriple [TRACKED],
 100
 101         test: bool [TRACKED],
 102         error_format: ErrorOutputType [UNTRACKED],
 103
 104         // If `Some`, enable incremental compilation, using the given
 105         // directory to store intermediate results.
 106         incremental: Option<PathBuf> [UNTRACKED],
 107
 108         debugging_opts: DebuggingOptions [TRACKED],
 109         prints: Vec<PrintRequest> [UNTRACKED],
 110         // Determines which borrow checker(s) to run. This is the parsed, sanitized
 111         // version of `debugging_opts.borrowck`, which is just a plain string.
 112         borrowck_mode: BorrowckMode [UNTRACKED],
 113         cg: CodegenOptions [TRACKED],
 114         externs: Externs [UNTRACKED],
 115         crate_name: Option<String> [TRACKED],
 116         // An optional name to use as the crate for std during std injection,
 117         // written `extern crate name as std`. Defaults to `std`. Used by
 118         // out-of-tree drivers.
 119         alt_std_name: Option<String> [TRACKED],
 120         // Indicates how the compiler should treat unstable features.
 121         unstable_features: UnstableFeatures [TRACKED],
 122
 123         // Indicates whether this run of the compiler is actually rustdoc. This
 124         // is currently just a hack and will be removed eventually, so please
 125         // try to not rely on this too much.
 126         actually_rustdoc: bool [TRACKED],
 127
 128         // Control path trimming.
 129         trimmed_def_paths: TrimmedDefPaths [TRACKED],
 130
 131         // Specifications of codegen units / ThinLTO which are forced as a
 132         // result of parsing command line options. These are not necessarily
 133         // what rustc was invoked with, but massaged a bit to agree with
 134         // commands like `--emit llvm-ir` which they're often incompatible with
 135         // if we otherwise use the defaults of rustc.
 136         cli_forced_codegen_units: Option<usize> [UNTRACKED],
 137         cli_forced_thinlto_off: bool [UNTRACKED],
 138
 139         // Remap source path prefixes in all output (messages, object files, debug, etc.).
 140         remap_path_prefix: Vec<(PathBuf, PathBuf)> [UNTRACKED],
 141
 142         edition: Edition [TRACKED],
 143
 144         // `true` if we're emitting JSON blobs about each artifact produced
 145         // by the compiler.
 146         json_artifact_notifications: bool [TRACKED],
 147
 148         pretty: Option<PpMode> [UNTRACKED],
 149     }
 150 );
 151
 152 /// Defines all `CodegenOptions`/`DebuggingOptions` fields and parsers all at once. The goal of this
 153 /// macro is to define an interface that can be programmatically used by the option parser
 154 /// to initialize the struct without hardcoding field names all over the place.
 155 ///
 156 /// The goal is to invoke this macro once with the correct fields, and then this macro generates all
 157 /// necessary code. The main gotcha of this macro is the `cgsetters` module which is a bunch of
 158 /// generated code to parse an option into its respective field in the struct. There are a few
 159 /// hand-written parsers for parsing specific types of values in this module.
 160 macro_rules! options {
 161     ($struct_name:ident, $setter_name:ident, $defaultfn:ident,
 162      $buildfn:ident, $prefix:expr, $outputname:expr,
 163      $stat:ident, $mod_desc:ident, $mod_set:ident,
 164      $($opt:ident : $t:ty = (
 165         $init:expr,
 166         $parse:ident,
 167         [$dep_tracking_marker:ident $(($dep_warn_val:expr, $dep_warn_text:expr))*],
 168         $desc:expr)
 169      ),* ,) =>
 170 (
 171     #[derive(Clone)]
 172     pub struct $struct_name { $(pub $opt: $t),* }
 173
 174     pub fn $defaultfn() -> $struct_name {
 175         $struct_name { $($opt: $init),* }
 176     }
 177
 178     pub fn $buildfn(matches: &getopts::Matches, error_format: ErrorOutputType) -> $struct_name
 179     {
 180         let mut op = $defaultfn();
 181         for option in matches.opt_strs($prefix) {
 182             let (key, value) = match option.split_once('=') {
 183                 None => (option, None),
 184                 Some((k, v)) => (k.to_string(), Some(v)),
 185             };
 186             let option_to_lookup = key.replace("-", "_");
 187             let mut found = false;
 188             for &(candidate, setter, type_desc, _) in $stat {
 189                 if option_to_lookup != candidate { continue }
 190                 if !setter(&mut op, value) {
 191                     match value {
 192                         None => {
 193                             early_error(error_format, &format!("{0} option `{1}` requires \
 194                                                                 {2} ({3} {1}=<value>)",
 195                                                                $outputname, key,
 196                                                                type_desc, $prefix))
 197                         }
 198                         Some(value) => {
 199                             early_error(error_format, &format!("incorrect value `{}` for {} \
 200                                                                 option `{}` - {} was expected",
 201                                                                value, $outputname,
 202                                                                key, type_desc))
 203                         }
 204                     }
 205                 }
 206                 found = true;
 207                 break;
 208             }
 209             if !found {
 210                 early_error(error_format, &format!("unknown {} option: `{}`",
 211                                                    $outputname, key));
 212             }
 213         }
 214         return op;
 215     }
 216
 217     impl dep_tracking::DepTrackingHash for $struct_name {
 218         fn hash(&self, hasher: &mut DefaultHasher, error_format: ErrorOutputType) {
 219             let mut sub_hashes = BTreeMap::new();
 220             $({
 221                 hash_option!($opt,
 222                              &self.$opt,
 223                              &mut sub_hashes,
 224                              [$dep_tracking_marker $($dep_warn_val,
 225                                                      $dep_warn_text,
 226                                                      error_format)*]);
 227             })*
 228             dep_tracking::stable_hash(sub_hashes, hasher, error_format);
 229         }
 230     }
 231
 232     pub type $setter_name = fn(&mut $struct_name, v: Option<&str>) -> bool;
 233     pub const $stat: &[(&str, $setter_name, &str, &str)] =
 234         &[ $( (stringify!($opt), $mod_set::$opt, $mod_desc::$parse, $desc) ),* ];
 235
 236     #[allow(non_upper_case_globals, dead_code)]
 237     mod $mod_desc {
 238         pub const parse_no_flag: &str = "no value";
 239         pub const parse_bool: &str = "one of: `y`, `yes`, `on`, `n`, `no`, or `off`";
 240         pub const parse_opt_bool: &str = parse_bool;
 241         pub const parse_string: &str = "a string";
 242         pub const parse_opt_string: &str = parse_string;
 243         pub const parse_string_push: &str = parse_string;
 244         pub const parse_opt_pathbuf: &str = "a path";
 245         pub const parse_pathbuf_push: &str = parse_opt_pathbuf;
 246         pub const parse_list: &str = "a space-separated list of strings";
 247         pub const parse_opt_list: &str = parse_list;
 248         pub const parse_opt_comma_list: &str = "a comma-separated list of strings";
 249         pub const parse_uint: &str = "a number";
 250         pub const parse_opt_uint: &str = parse_uint;
 251         pub const parse_threads: &str = parse_uint;
 252         pub const parse_passes: &str = "a space-separated list of passes, or `all`";
 253         pub const parse_panic_strategy: &str = "either `unwind` or `abort`";
 254         pub const parse_relro_level: &str = "one of: `full`, `partial`, or `off`";
 255         pub const parse_sanitizers: &str = "comma separated list of sanitizers: `address`, `leak`, `memory` or `thread`";
 256         pub const parse_sanitizer_memory_track_origins: &str = "0, 1, or 2";
 257         pub const parse_cfguard: &str =
 258             "either a boolean (`yes`, `no`, `on`, `off`, etc), `checks`, or `nochecks`";
 259         pub const parse_strip: &str = "either `none`, `debuginfo`, or `symbols`";
 260         pub const parse_linker_flavor: &str = ::rustc_target::spec::LinkerFlavor::one_of();
 261         pub const parse_optimization_fuel: &str = "crate=integer";
 262         pub const parse_mir_spanview: &str = "`statement` (default), `terminator`, or `block`";
 263         pub const parse_unpretty: &str = "`string` or `string=string`";
 264         pub const parse_treat_err_as_bug: &str = "either no value or a number bigger than 0";
 265         pub const parse_lto: &str =
 266             "either a boolean (`yes`, `no`, `on`, `off`, etc), `thin`, `fat`, or omitted";
 267         pub const parse_linker_plugin_lto: &str =
 268             "either a boolean (`yes`, `no`, `on`, `off`, etc), or the path to the linker plugin";
 269         pub const parse_switch_with_opt_path: &str =
 270             "an optional path to the profiling data output directory";
 271         pub const parse_merge_functions: &str = "one of: `disabled`, `trampolines`, or `aliases`";
 272         pub const parse_symbol_mangling_version: &str = "either `legacy` or `v0` (RFC 2603)";
 273         pub const parse_src_file_hash: &str = "either `md5` or `sha1`";
 274         pub const parse_relocation_model: &str =
 275             "one of supported relocation models (`rustc --print relocation-models`)";
 276         pub const parse_code_model: &str =
 277             "one of supported code models (`rustc --print code-models`)";
 278         pub const parse_tls_model: &str =
 279             "one of supported TLS models (`rustc --print tls-models`)";
 280         pub const parse_target_feature: &str = parse_string;
 281         pub const parse_wasi_exec_model: &str = "either `command` or `reactor`";
 282         pub const parse_split_debuginfo: &str =
 283             "one of supported split-debuginfo modes (`off` or `dsymutil`)";
 284     }
 285
 286     #[allow(dead_code)]
 287     mod $mod_set {
 288         use super::*;
 289         use std::str::FromStr;
 290
 291         // Sometimes different options need to build a common structure.
 292         // That structure can kept in one of the options' fields, the others become dummy.
 293         macro_rules! redirect_field {
 294             ($cg:ident.link_arg) => { $cg.link_args };
 295             ($cg:ident.pre_link_arg) => { $cg.pre_link_args };
 296             ($cg:ident.$field:ident) => { $cg.$field };
 297         }
 298
 299         $(
 300             pub fn $opt(cg: &mut $struct_name, v: Option<&str>) -> bool {
 301                 $parse(&mut redirect_field!(cg.$opt), v)
 302             }
 303         )*
 304
 305         /// This is for boolean options that don't take a value and start with
 306         /// `no-`. This style of option is deprecated.
 307         fn parse_no_flag(slot: &mut bool, v: Option<&str>) -> bool {
 308             match v {
 309                 None => { *slot = true; true }
 310                 Some(_) => false,
 311             }
 312         }
 313
 314         /// Use this for any boolean option that has a static default.
 315         fn parse_bool(slot: &mut bool, v: Option<&str>) -> bool {
 316             match v {
 317                 Some("y") | Some("yes") | Some("on") | None => { *slot = true; true }
 318                 Some("n") | Some("no") | Some("off") => { *slot = false; true }
 319                 _ => false,
 320             }
 321         }
 322
 323         /// Use this for any boolean option that lacks a static default. (The
 324         /// actions taken when such an option is not specified will depend on
 325         /// other factors, such as other options, or target options.)
 326         fn parse_opt_bool(slot: &mut Option<bool>, v: Option<&str>) -> bool {
 327             match v {
 328                 Some("y") | Some("yes") | Some("on") | None => { *slot = Some(true); true }
 329                 Some("n") | Some("no") | Some("off") => { *slot = Some(false); true }
 330                 _ => false,
 331             }
 332         }
 333
 334         /// Use this for any string option that has a static default.
 335         fn parse_string(slot: &mut String, v: Option<&str>) -> bool {
 336             match v {
 337                 Some(s) => { *slot = s.to_string(); true },
 338                 None => false,
 339             }
 340         }
 341
 342         /// Use this for any string option that lacks a static default.
 343         fn parse_opt_string(slot: &mut Option<String>, v: Option<&str>) -> bool {
 344             match v {
 345                 Some(s) => { *slot = Some(s.to_string()); true },
 346                 None => false,
 347             }
 348         }
 349
 350         fn parse_opt_pathbuf(slot: &mut Option<PathBuf>, v: Option<&str>) -> bool {
 351             match v {
 352                 Some(s) => { *slot = Some(PathBuf::from(s)); true },
 353                 None => false,
 354             }
 355         }
 356
 357         fn parse_string_push(slot: &mut Vec<String>, v: Option<&str>) -> bool {
 358             match v {
 359                 Some(s) => { slot.push(s.to_string()); true },
 360                 None => false,
 361             }
 362         }
 363
 364         fn parse_pathbuf_push(slot: &mut Vec<PathBuf>, v: Option<&str>) -> bool {
 365             match v {
 366                 Some(s) => { slot.push(PathBuf::from(s)); true },
 367                 None => false,
 368             }
 369         }
 370
 371         fn parse_list(slot: &mut Vec<String>, v: Option<&str>)
 372                       -> bool {
 373             match v {
 374                 Some(s) => {
 375                     slot.extend(s.split_whitespace().map(|s| s.to_string()));
 376                     true
 377                 },
 378                 None => false,
 379             }
 380         }
 381
 382         fn parse_opt_list(slot: &mut Option<Vec<String>>, v: Option<&str>)
 383                       -> bool {
 384             match v {
 385                 Some(s) => {
 386                     let v = s.split_whitespace().map(|s| s.to_string()).collect();
 387                     *slot = Some(v);
 388                     true
 389                 },
 390                 None => false,
 391             }
 392         }
 393
 394         fn parse_opt_comma_list(slot: &mut Option<Vec<String>>, v: Option<&str>)
 395                       -> bool {
 396             match v {
 397                 Some(s) => {
 398                     let v = s.split(',').map(|s| s.to_string()).collect();
 399                     *slot = Some(v);
 400                     true
 401                 },
 402                 None => false,
 403             }
 404         }
 405
 406         fn parse_threads(slot: &mut usize, v: Option<&str>) -> bool {
 407             match v.and_then(|s| s.parse().ok()) {
 408                 Some(0) => { *slot = ::num_cpus::get(); true },
 409                 Some(i) => { *slot = i; true },
 410                 None => false
 411             }
 412         }
 413
 414         /// Use this for any uint option that has a static default.
 415         fn parse_uint(slot: &mut usize, v: Option<&str>) -> bool {
 416             match v.and_then(|s| s.parse().ok()) {
 417                 Some(i) => { *slot = i; true },
 418                 None => false
 419             }
 420         }
 421
 422         /// Use this for any uint option that lacks a static default.
 423         fn parse_opt_uint(slot: &mut Option<usize>, v: Option<&str>) -> bool {
 424             match v {
 425                 Some(s) => { *slot = s.parse().ok(); slot.is_some() }
 426                 None => false
 427             }
 428         }
 429
 430         fn parse_passes(slot: &mut Passes, v: Option<&str>) -> bool {
 431             match v {
 432                 Some("all") => {
 433                     *slot = Passes::All;
 434                     true
 435                 }
 436                 v => {
 437                     let mut passes = vec![];
 438                     if parse_list(&mut passes, v) {
 439                         *slot = Passes::Some(passes);
 440                         true
 441                     } else {
 442                         false
 443                     }
 444                 }
 445             }
 446         }
 447
 448         fn parse_panic_strategy(slot: &mut Option<PanicStrategy>, v: Option<&str>) -> bool {
 449             match v {
 450                 Some("unwind") => *slot = Some(PanicStrategy::Unwind),
 451                 Some("abort") => *slot = Some(PanicStrategy::Abort),
 452                 _ => return false
 453             }
 454             true
 455         }
 456
 457         fn parse_relro_level(slot: &mut Option<RelroLevel>, v: Option<&str>) -> bool {
 458             match v {
 459                 Some(s) => {
 460                     match s.parse::<RelroLevel>() {
 461                         Ok(level) => *slot = Some(level),
 462                         _ => return false
 463                     }
 464                 },
 465                 _ => return false
 466             }
 467             true
 468         }
 469
 470         fn parse_sanitizers(slot: &mut SanitizerSet, v: Option<&str>) -> bool {
 471             if let Some(v) = v {
 472                 for s in v.split(',') {
 473                     *slot |= match s {
 474                         "address" => SanitizerSet::ADDRESS,
 475                         "leak" => SanitizerSet::LEAK,
 476                         "memory" => SanitizerSet::MEMORY,
 477                         "thread" => SanitizerSet::THREAD,
 478                         _ => return false,
 479                     }
 480                 }
 481                 true
 482             } else {
 483                 false
 484             }
 485         }
 486
 487         fn parse_sanitizer_memory_track_origins(slot: &mut usize, v: Option<&str>) -> bool {
 488             match v {
 489                 Some("2") | None => { *slot = 2; true }
 490                 Some("1") => { *slot = 1; true }
 491                 Some("0") => { *slot = 0; true }
 492                 Some(_) => false,
 493             }
 494         }
 495
 496         fn parse_strip(slot: &mut Strip, v: Option<&str>) -> bool {
 497             match v {
 498                 Some("none") => *slot = Strip::None,
 499                 Some("debuginfo") => *slot = Strip::Debuginfo,
 500                 Some("symbols") => *slot = Strip::Symbols,
 501                 _ => return false,
 502             }
 503             true
 504         }
 505
 506         fn parse_cfguard(slot: &mut CFGuard, v: Option<&str>) -> bool {
 507             if v.is_some() {
 508                 let mut bool_arg = None;
 509                 if parse_opt_bool(&mut bool_arg, v) {
 510                     *slot = if bool_arg.unwrap() {
 511                         CFGuard::Checks
 512                     } else {
 513                         CFGuard::Disabled
 514                     };
 515                     return true
 516                 }
 517             }
 518
 519             *slot = match v {
 520                 None => CFGuard::Checks,
 521                 Some("checks") => CFGuard::Checks,
 522                 Some("nochecks") => CFGuard::NoChecks,
 523                 Some(_) => return false,
 524             };
 525             true
 526         }
 527
 528         fn parse_linker_flavor(slote: &mut Option<LinkerFlavor>, v: Option<&str>) -> bool {
 529             match v.and_then(LinkerFlavor::from_str) {
 530                 Some(lf) => *slote = Some(lf),
 531                 _ => return false,
 532             }
 533             true
 534         }
 535
 536         fn parse_optimization_fuel(slot: &mut Option<(String, u64)>, v: Option<&str>) -> bool {
 537             match v {
 538                 None => false,
 539                 Some(s) => {
 540                     let parts = s.split('=').collect::<Vec<_>>();
 541                     if parts.len() != 2 { return false; }
 542                     let crate_name = parts[0].to_string();
 543                     let fuel = parts[1].parse::<u64>();
 544                     if fuel.is_err() { return false; }
 545                     *slot = Some((crate_name, fuel.unwrap()));
 546                     true
 547                 }
 548             }
 549         }
 550
 551         fn parse_unpretty(slot: &mut Option<String>, v: Option<&str>) -> bool {
 552             match v {
 553                 None => false,
 554                 Some(s) if s.split('=').count() <= 2 => {
 555                     *slot = Some(s.to_string());
 556                     true
 557                 }
 558                 _ => false,
 559             }
 560         }
 561
 562         fn parse_mir_spanview(slot: &mut Option<MirSpanview>, v: Option<&str>) -> bool {
 563             if v.is_some() {
 564                 let mut bool_arg = None;
 565                 if parse_opt_bool(&mut bool_arg, v) {
 566                     *slot = if bool_arg.unwrap() {
 567                         Some(MirSpanview::Statement)
 568                     } else {
 569                         None
 570                     };
 571                     return true
 572                 }
 573             }
 574
 575             let v = match v {
 576                 None => {
 577                     *slot = Some(MirSpanview::Statement);
 578                     return true;
 579                 }
 580                 Some(v) => v,
 581             };
 582
 583             *slot = Some(match v.trim_end_matches("s") {
 584                 "statement" | "stmt" => MirSpanview::Statement,
 585                 "terminator" | "term" => MirSpanview::Terminator,
 586                 "block" | "basicblock" => MirSpanview::Block,
 587                 _ => return false,
 588             });
 589             true
 590         }
 591
 592         fn parse_treat_err_as_bug(slot: &mut Option<usize>, v: Option<&str>) -> bool {
 593             match v {
 594                 Some(s) => { *slot = s.parse().ok().filter(|&x| x != 0); slot.unwrap_or(0) != 0 }
 595                 None => { *slot = Some(1); true }
 596             }
 597         }
 598
 599         fn parse_lto(slot: &mut LtoCli, v: Option<&str>) -> bool {
 600             if v.is_some() {
 601                 let mut bool_arg = None;
 602                 if parse_opt_bool(&mut bool_arg, v) {
 603                     *slot = if bool_arg.unwrap() {
 604                         LtoCli::Yes
 605                     } else {
 606                         LtoCli::No
 607                     };
 608                     return true
 609                 }
 610             }
 611
 612             *slot = match v {
 613                 None => LtoCli::NoParam,
 614                 Some("thin") => LtoCli::Thin,
 615                 Some("fat") => LtoCli::Fat,
 616                 Some(_) => return false,
 617             };
 618             true
 619         }
 620
 621         fn parse_linker_plugin_lto(slot: &mut LinkerPluginLto, v: Option<&str>) -> bool {
 622             if v.is_some() {
 623                 let mut bool_arg = None;
 624                 if parse_opt_bool(&mut bool_arg, v) {
 625                     *slot = if bool_arg.unwrap() {
 626                         LinkerPluginLto::LinkerPluginAuto
 627                     } else {
 628                         LinkerPluginLto::Disabled
 629                     };
 630                     return true
 631                 }
 632             }
 633
 634             *slot = match v {
 635                 None => LinkerPluginLto::LinkerPluginAuto,
 636                 Some(path) => LinkerPluginLto::LinkerPlugin(PathBuf::from(path)),
 637             };
 638             true
 639         }
 640
 641         fn parse_switch_with_opt_path(slot: &mut SwitchWithOptPath, v: Option<&str>) -> bool {
 642             *slot = match v {
 643                 None => SwitchWithOptPath::Enabled(None),
 644                 Some(path) => SwitchWithOptPath::Enabled(Some(PathBuf::from(path))),
 645             };
 646             true
 647         }
 648
 649         fn parse_merge_functions(slot: &mut Option<MergeFunctions>, v: Option<&str>) -> bool {
 650             match v.and_then(|s| MergeFunctions::from_str(s).ok()) {
 651                 Some(mergefunc) => *slot = Some(mergefunc),
 652                 _ => return false,
 653             }
 654             true
 655         }
 656
 657         fn parse_relocation_model(slot: &mut Option<RelocModel>, v: Option<&str>) -> bool {
 658             match v.and_then(|s| RelocModel::from_str(s).ok()) {
 659                 Some(relocation_model) => *slot = Some(relocation_model),
 660                 None if v == Some("default") => *slot = None,
 661                 _ => return false,
 662             }
 663             true
 664         }
 665
 666         fn parse_code_model(slot: &mut Option<CodeModel>, v: Option<&str>) -> bool {
 667             match v.and_then(|s| CodeModel::from_str(s).ok()) {
 668                 Some(code_model) => *slot = Some(code_model),
 669                 _ => return false,
 670             }
 671             true
 672         }
 673
 674         fn parse_tls_model(slot: &mut Option<TlsModel>, v: Option<&str>) -> bool {
 675             match v.and_then(|s| TlsModel::from_str(s).ok()) {
 676                 Some(tls_model) => *slot = Some(tls_model),
 677                 _ => return false,
 678             }
 679             true
 680         }
 681
 682         fn parse_symbol_mangling_version(
 683             slot: &mut Option<SymbolManglingVersion>,
 684             v: Option<&str>,
 685         ) -> bool {
 686             *slot = match v {
 687                 Some("legacy") => Some(SymbolManglingVersion::Legacy),
 688                 Some("v0") => Some(SymbolManglingVersion::V0),
 689                 _ => return false,
 690             };
 691             true
 692         }
 693
 694         fn parse_src_file_hash(slot: &mut Option<SourceFileHashAlgorithm>, v: Option<&str>) -> bool {
 695             match v.and_then(|s| SourceFileHashAlgorithm::from_str(s).ok()) {
 696                 Some(hash_kind) => *slot = Some(hash_kind),
 697                 _ => return false,
 698             }
 699             true
 700         }
 701
 702         fn parse_target_feature(slot: &mut String, v: Option<&str>) -> bool {
 703             match v {
 704                 Some(s) => {
 705                     if !slot.is_empty() {
 706                         slot.push_str(",");
 707                     }
 708                     slot.push_str(s);
 709                     true
 710                 }
 711                 None => false,
 712             }
 713         }
 714
 715         fn parse_wasi_exec_model(slot: &mut Option<WasiExecModel>, v: Option<&str>) -> bool {
 716             match v {
 717                 Some("command")  => *slot = Some(WasiExecModel::Command),
 718                 Some("reactor") => *slot = Some(WasiExecModel::Reactor),
 719                 _ => return false,
 720             }
 721             true
 722         }
 723
 724         fn parse_split_debuginfo(slot: &mut Option<SplitDebuginfo>, v: Option<&str>) -> bool {
 725             match v.and_then(|s| SplitDebuginfo::from_str(s).ok()) {
 726                 Some(e) => *slot = Some(e),
 727                 _ => return false,
 728             }
 729             true
 730         }
 731     }
 732 ) }
 733
 734 options! {CodegenOptions, CodegenSetter, basic_codegen_options,
 735           build_codegen_options, "C", "codegen",
 736           CG_OPTIONS, cg_type_desc, cgsetters,
 737
 738     // This list is in alphabetical order.
 739     //
 740     // If you add a new option, please update:
 741     // - compiler/rustc_interface/src/tests.rs
 742     // - src/doc/rustc/src/codegen-options/index.md
 743
 744     ar: String = (String::new(), parse_string, [UNTRACKED],
 745         "this option is deprecated and does nothing"),
 746     code_model: Option<CodeModel> = (None, parse_code_model, [TRACKED],
 747         "choose the code model to use (`rustc --print code-models` for details)"),
 748     codegen_units: Option<usize> = (None, parse_opt_uint, [UNTRACKED],
 749         "divide crate into N units to optimize in parallel"),
 750     control_flow_guard: CFGuard = (CFGuard::Disabled, parse_cfguard, [TRACKED],
 751         "use Windows Control Flow Guard (default: no)"),
 752     debug_assertions: Option<bool> = (None, parse_opt_bool, [TRACKED],
 753         "explicitly enable the `cfg(debug_assertions)` directive"),
 754     debuginfo: usize = (0, parse_uint, [TRACKED],
 755         "debug info emission level (0 = no debug info, 1 = line tables only, \
 756         2 = full debug info with variable and type information; default: 0)"),
 757     default_linker_libraries: bool = (false, parse_bool, [UNTRACKED],
 758         "allow the linker to link its default libraries (default: no)"),
 759     embed_bitcode: bool = (true, parse_bool, [TRACKED],
 760         "emit bitcode in rlibs (default: yes)"),
 761     extra_filename: String = (String::new(), parse_string, [UNTRACKED],
 762         "extra data to put in each output filename"),
 763     force_frame_pointers: Option<bool> = (None, parse_opt_bool, [TRACKED],
 764         "force use of the frame pointers"),
 765     force_unwind_tables: Option<bool> = (None, parse_opt_bool, [TRACKED],
 766         "force use of unwind tables"),
 767     incremental: Option<String> = (None, parse_opt_string, [UNTRACKED],
 768         "enable incremental compilation"),
 769     inline_threshold: Option<usize> = (None, parse_opt_uint, [TRACKED],
 770         "set the threshold for inlining a function"),
 771     link_arg: (/* redirected to link_args */) = ((), parse_string_push, [UNTRACKED],
 772         "a single extra argument to append to the linker invocation (can be used several times)"),
 773     link_args: Vec<String> = (Vec::new(), parse_list, [UNTRACKED],
 774         "extra arguments to append to the linker invocation (space separated)"),
 775     link_dead_code: Option<bool> = (None, parse_opt_bool, [UNTRACKED],
 776         "keep dead code at link time (useful for code coverage) (default: no)"),
 777     link_self_contained: Option<bool> = (None, parse_opt_bool, [UNTRACKED],
 778         "control whether to link Rust provided C objects/libraries or rely
 779         on C toolchain installed in the system"),
 780     linker: Option<PathBuf> = (None, parse_opt_pathbuf, [UNTRACKED],
 781         "system linker to link outputs with"),
 782     linker_flavor: Option<LinkerFlavor> = (None, parse_linker_flavor, [UNTRACKED],
 783         "linker flavor"),
 784     linker_plugin_lto: LinkerPluginLto = (LinkerPluginLto::Disabled,
 785         parse_linker_plugin_lto, [TRACKED],
 786         "generate build artifacts that are compatible with linker-based LTO"),
 787     llvm_args: Vec<String> = (Vec::new(), parse_list, [TRACKED],
 788         "a list of arguments to pass to LLVM (space separated)"),
 789     lto: LtoCli = (LtoCli::Unspecified, parse_lto, [TRACKED],
 790         "perform LLVM link-time optimizations"),
 791     metadata: Vec<String> = (Vec::new(), parse_list, [TRACKED],
 792         "metadata to mangle symbol names with"),
 793     no_prepopulate_passes: bool = (false, parse_no_flag, [TRACKED],
 794         "give an empty list of passes to the pass manager"),
 795     no_redzone: Option<bool> = (None, parse_opt_bool, [TRACKED],
 796         "disable the use of the redzone"),
 797     no_stack_check: bool = (false, parse_no_flag, [UNTRACKED],
 798         "this option is deprecated and does nothing"),
 799     no_vectorize_loops: bool = (false, parse_no_flag, [TRACKED],
 800         "disable loop vectorization optimization passes"),
 801     no_vectorize_slp: bool = (false, parse_no_flag, [TRACKED],
 802         "disable LLVM's SLP vectorization pass"),
 803     opt_level: String = ("0".to_string(), parse_string, [TRACKED],
 804         "optimization level (0-3, s, or z; default: 0)"),
 805     overflow_checks: Option<bool> = (None, parse_opt_bool, [TRACKED],
 806         "use overflow checks for integer arithmetic"),
 807     panic: Option<PanicStrategy> = (None, parse_panic_strategy, [TRACKED],
 808         "panic strategy to compile crate with"),
 809     passes: Vec<String> = (Vec::new(), parse_list, [TRACKED],
 810         "a list of extra LLVM passes to run (space separated)"),
 811     prefer_dynamic: bool = (false, parse_bool, [TRACKED],
 812         "prefer dynamic linking to static linking (default: no)"),
 813     profile_generate: SwitchWithOptPath = (SwitchWithOptPath::Disabled,
 814         parse_switch_with_opt_path, [TRACKED],
 815         "compile the program with profiling instrumentation"),
 816     profile_use: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
 817         "use the given `.profdata` file for profile-guided optimization"),
 818     relocation_model: Option<RelocModel> = (None, parse_relocation_model, [TRACKED],
 819         "control generation of position-independent code (PIC) \
 820         (`rustc --print relocation-models` for details)"),
 821     remark: Passes = (Passes::Some(Vec::new()), parse_passes, [UNTRACKED],
 822         "print remarks for these optimization passes (space separated, or \"all\")"),
 823     rpath: bool = (false, parse_bool, [UNTRACKED],
 824         "set rpath values in libs/exes (default: no)"),
 825     save_temps: bool = (false, parse_bool, [UNTRACKED],
 826         "save all temporary output files during compilation (default: no)"),
 827     soft_float: bool = (false, parse_bool, [TRACKED],
 828         "use soft float ABI (*eabihf targets only) (default: no)"),
 829     split_debuginfo: Option<SplitDebuginfo> = (None, parse_split_debuginfo, [TRACKED],
 830         "how to handle split-debuginfo, a platform-specific option"),
 831     target_cpu: Option<String> = (None, parse_opt_string, [TRACKED],
 832         "select target processor (`rustc --print target-cpus` for details)"),
 833     target_feature: String = (String::new(), parse_target_feature, [TRACKED],
 834         "target specific attributes. (`rustc --print target-features` for details). \
 835         This feature is unsafe."),
 836
 837     // This list is in alphabetical order.
 838     //
 839     // If you add a new option, please update:
 840     // - compiler/rustc_interface/src/tests.rs
 841     // - src/doc/rustc/src/codegen-options/index.md
 842 }
 843
 844 options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
 845           build_debugging_options, "Z", "debugging",
 846           DB_OPTIONS, db_type_desc, dbsetters,
 847
 848     // This list is in alphabetical order.
 849     //
 850     // If you add a new option, please update:
 851     // - compiler/rustc_interface/src/tests.rs
 852
 853     allow_features: Option<Vec<String>> = (None, parse_opt_comma_list, [TRACKED],
 854         "only allow the listed language features to be enabled in code (space separated)"),
 855     always_encode_mir: bool = (false, parse_bool, [TRACKED],
 856         "encode MIR of all functions into the crate metadata (default: no)"),
 857     assume_incomplete_release: bool = (false, parse_bool, [TRACKED],
 858         "make cfg(version) treat the current version as incomplete (default: no)"),
 859     asm_comments: bool = (false, parse_bool, [TRACKED],
 860         "generate comments into the assembly (may change behavior) (default: no)"),
 861     ast_json: bool = (false, parse_bool, [UNTRACKED],
 862         "print the AST as JSON and halt (default: no)"),
 863     ast_json_noexpand: bool = (false, parse_bool, [UNTRACKED],
 864         "print the pre-expansion AST as JSON and halt (default: no)"),
 865     binary_dep_depinfo: bool = (false, parse_bool, [TRACKED],
 866         "include artifacts (sysroot, crate dependencies) used during compilation in dep-info \
 867         (default: no)"),
 868     borrowck: String = ("migrate".to_string(), parse_string, [UNTRACKED],
 869         "select which borrowck is used (`mir` or `migrate`) (default: `migrate`)"),
 870     borrowck_stats: bool = (false, parse_bool, [UNTRACKED],
 871         "gather borrowck statistics (default: no)"),
 872     cgu_partitioning_strategy: Option<String> = (None, parse_opt_string, [TRACKED],
 873         "the codegen unit partitioning strategy to use"),
 874     chalk: bool = (false, parse_bool, [TRACKED],
 875         "enable the experimental Chalk-based trait solving engine"),
 876     codegen_backend: Option<String> = (None, parse_opt_string, [TRACKED],
 877         "the backend to use"),
 878     combine_cgu: bool = (false, parse_bool, [TRACKED],
 879         "combine CGUs into a single one"),
 880     crate_attr: Vec<String> = (Vec::new(), parse_string_push, [TRACKED],
 881         "inject the given attribute in the crate"),
 882     debug_macros: bool = (false, parse_bool, [TRACKED],
 883         "emit line numbers debug info inside macros (default: no)"),
 884     deduplicate_diagnostics: bool = (true, parse_bool, [UNTRACKED],
 885         "deduplicate identical diagnostics (default: yes)"),
 886     dep_info_omit_d_target: bool = (false, parse_bool, [TRACKED],
 887         "in dep-info output, omit targets for tracking dependencies of the dep-info files \
 888         themselves (default: no)"),
 889     dep_tasks: bool = (false, parse_bool, [UNTRACKED],
 890         "print tasks that execute and the color their dep node gets (requires debug build) \
 891         (default: no)"),
 892     dont_buffer_diagnostics: bool = (false, parse_bool, [UNTRACKED],
 893         "emit diagnostics rather than buffering (breaks NLL error downgrading, sorting) \
 894         (default: no)"),
 895     dual_proc_macros: bool = (false, parse_bool, [TRACKED],
 896         "load proc macros for both target and host, but only link to the target (default: no)"),
 897     dump_dep_graph: bool = (false, parse_bool, [UNTRACKED],
 898         "dump the dependency graph to $RUST_DEP_GRAPH (default: /tmp/dep_graph.gv) \
 899         (default: no)"),
 900     dump_mir: Option<String> = (None, parse_opt_string, [UNTRACKED],
 901         "dump MIR state to file.
 902         `val` is used to select which passes and functions to dump. For example:
 903         `all` matches all passes and functions,
 904         `foo` matches all passes for functions whose name contains 'foo',
 905         `foo & ConstProp` only the 'ConstProp' pass for function names containing 'foo',
 906         `foo | bar` all passes for function names containing 'foo' or 'bar'."),
 907     dump_mir_dataflow: bool = (false, parse_bool, [UNTRACKED],
 908         "in addition to `.mir` files, create graphviz `.dot` files with dataflow results \
 909         (default: no)"),
 910     dump_mir_dir: String = ("mir_dump".to_string(), parse_string, [UNTRACKED],
 911         "the directory the MIR is dumped into (default: `mir_dump`)"),
 912     dump_mir_exclude_pass_number: bool = (false, parse_bool, [UNTRACKED],
 913         "exclude the pass number when dumping MIR (used in tests) (default: no)"),
 914     dump_mir_graphviz: bool = (false, parse_bool, [UNTRACKED],
 915         "in addition to `.mir` files, create graphviz `.dot` files (and with \
 916         `-Z instrument-coverage`, also create a `.dot` file for the MIR-derived \
 917         coverage graph) (default: no)"),
 918     dump_mir_spanview: Option<MirSpanview> = (None, parse_mir_spanview, [UNTRACKED],
 919         "in addition to `.mir` files, create `.html` files to view spans for \
 920         all `statement`s (including terminators), only `terminator` spans, or \
 921         computed `block` spans (one span encompassing a block's terminator and \
 922         all statements). If `-Z instrument-coverage` is also enabled, create \
 923         an additional `.html` file showing the computed coverage spans."),
 924     emit_future_incompat_report: bool = (false, parse_bool, [UNTRACKED],
 925         "emits a future-incompatibility report for lints (RFC 2834)"),
 926     emit_stack_sizes: bool = (false, parse_bool, [UNTRACKED],
 927         "emit a section containing stack size metadata (default: no)"),
 928     fewer_names: Option<bool> = (None, parse_opt_bool, [TRACKED],
 929         "reduce memory use by retaining fewer names within compilation artifacts (LLVM-IR) \
 930         (default: no)"),
 931     force_overflow_checks: Option<bool> = (None, parse_opt_bool, [TRACKED],
 932         "force overflow checks on or off"),
 933     force_unstable_if_unmarked: bool = (false, parse_bool, [TRACKED],
 934         "force all crates to be `rustc_private` unstable (default: no)"),
 935     fuel: Option<(String, u64)> = (None, parse_optimization_fuel, [TRACKED],
 936         "set the optimization fuel quota for a crate"),
 937     function_sections: Option<bool> = (None, parse_opt_bool, [TRACKED],
 938         "whether each function should go in its own section"),
 939     graphviz_dark_mode: bool = (false, parse_bool, [UNTRACKED],
 940         "use dark-themed colors in graphviz output (default: no)"),
 941     graphviz_font: String = ("Courier, monospace".to_string(), parse_string, [UNTRACKED],
 942         "use the given `fontname` in graphviz output; can be overridden by setting \
 943         environment variable `RUSTC_GRAPHVIZ_FONT` (default: `Courier, monospace`)"),
 944     hir_stats: bool = (false, parse_bool, [UNTRACKED],
 945         "print some statistics about AST and HIR (default: no)"),
 946     human_readable_cgu_names: bool = (false, parse_bool, [TRACKED],
 947         "generate human-readable, predictable names for codegen units (default: no)"),
 948     identify_regions: bool = (false, parse_bool, [UNTRACKED],
 949         "display unnamed regions as `'<id>`, using a non-ident unique id (default: no)"),
 950     incremental_ignore_spans: bool = (false, parse_bool, [UNTRACKED],
 951         "ignore spans during ICH computation -- used for testing (default: no)"),
 952     incremental_info: bool = (false, parse_bool, [UNTRACKED],
 953         "print high-level information about incremental reuse (or the lack thereof) \
 954         (default: no)"),
 955     incremental_verify_ich: bool = (false, parse_bool, [UNTRACKED],
 956         "verify incr. comp. hashes of green query instances (default: no)"),
 957     inline_mir_threshold: usize = (50, parse_uint, [TRACKED],
 958         "a default MIR inlining threshold (default: 50)"),
 959     inline_mir_hint_threshold: usize = (100, parse_uint, [TRACKED],
 960         "inlining threshold for functions with inline hint (default: 100)"),
 961     inline_in_all_cgus: Option<bool> = (None, parse_opt_bool, [TRACKED],
 962         "control whether `#[inline]` functions are in all CGUs"),
 963     input_stats: bool = (false, parse_bool, [UNTRACKED],
 964         "gather statistics about the input (default: no)"),
 965     insert_sideeffect: bool = (false, parse_bool, [TRACKED],
 966         "fix undefined behavior when a thread doesn't eventually make progress \
 967         (such as entering an empty infinite loop) by inserting llvm.sideeffect \
 968         (default: no)"),
 969     instrument_coverage: bool = (false, parse_bool, [TRACKED],
 970         "instrument the generated code to support LLVM source-based code coverage \
 971         reports (note, the compiler build config must include `profiler = true`, \
 972         and is mutually exclusive with `-C profile-generate`/`-C profile-use`); \
 973         implies `-Z symbol-mangling-version=v0`; disables/overrides some Rust \
 974         optimizations (default: no)"),
 975     instrument_mcount: bool = (false, parse_bool, [TRACKED],
 976         "insert function instrument code for mcount-based tracing (default: no)"),
 977     keep_hygiene_data: bool = (false, parse_bool, [UNTRACKED],
 978         "keep hygiene data after analysis (default: no)"),
 979     link_native_libraries: bool = (true, parse_bool, [UNTRACKED],
 980         "link native libraries in the linker invocation (default: yes)"),
 981     link_only: bool = (false, parse_bool, [TRACKED],
 982         "link the `.rlink` file generated by `-Z no-link` (default: no)"),
 983     llvm_time_trace: bool = (false, parse_bool, [UNTRACKED],
 984         "generate JSON tracing data file from LLVM data (default: no)"),
 985     ls: bool = (false, parse_bool, [UNTRACKED],
 986         "list the symbols defined by a library crate (default: no)"),
 987     macro_backtrace: bool = (false, parse_bool, [UNTRACKED],
 988         "show macro backtraces (default: no)"),
 989     merge_functions: Option<MergeFunctions> = (None, parse_merge_functions, [TRACKED],
 990         "control the operation of the MergeFunctions LLVM pass, taking \
 991         the same values as the target option of the same name"),
 992     meta_stats: bool = (false, parse_bool, [UNTRACKED],
 993         "gather metadata statistics (default: no)"),
 994     mir_emit_retag: bool = (false, parse_bool, [TRACKED],
 995         "emit Retagging MIR statements, interpreted e.g., by miri; implies -Zmir-opt-level=0 \
 996         (default: no)"),
 997     mir_opt_level: usize = (1, parse_uint, [TRACKED],
 998         "MIR optimization level (0-3; default: 1)"),
 999     mutable_noalias: bool = (false, parse_bool, [TRACKED],
1000         "emit noalias metadata for mutable references (default: no)"),
1001     new_llvm_pass_manager: bool = (false, parse_bool, [TRACKED],
1002         "use new LLVM pass manager (default: no)"),
1003     nll_facts: bool = (false, parse_bool, [UNTRACKED],
1004         "dump facts from NLL analysis into side files (default: no)"),
1005     nll_facts_dir: String = ("nll-facts".to_string(), parse_string, [UNTRACKED],
1006         "the directory the NLL facts are dumped into (default: `nll-facts`)"),
1007     no_analysis: bool = (false, parse_no_flag, [UNTRACKED],
1008         "parse and expand the source, but run no analysis"),
1009     no_codegen: bool = (false, parse_no_flag, [TRACKED],
1010         "run all passes except codegen; no output"),
1011     no_generate_arange_section: bool = (false, parse_no_flag, [TRACKED],
1012         "omit DWARF address ranges that give faster lookups"),
1013     no_interleave_lints: bool = (false, parse_no_flag, [UNTRACKED],
1014         "execute lints separately; allows benchmarking individual lints"),
1015     no_leak_check: bool = (false, parse_no_flag, [UNTRACKED],
1016         "disable the 'leak check' for subtyping; unsound, but useful for tests"),
1017     no_link: bool = (false, parse_no_flag, [TRACKED],
1018         "compile without linking"),
1019     no_parallel_llvm: bool = (false, parse_no_flag, [UNTRACKED],
1020         "run LLVM in non-parallel mode (while keeping codegen-units and ThinLTO)"),
1021     no_profiler_runtime: bool = (false, parse_no_flag, [TRACKED],
1022         "prevent automatic injection of the profiler_builtins crate"),
1023     normalize_docs: bool = (false, parse_bool, [TRACKED],
1024         "normalize associated items in rustdoc when generating documentation"),
1025     osx_rpath_install_name: bool = (false, parse_bool, [TRACKED],
1026         "pass `-install_name @rpath/...` to the macOS linker (default: no)"),
1027     panic_abort_tests: bool = (false, parse_bool, [TRACKED],
1028         "support compiling tests with panic=abort (default: no)"),
1029     parse_only: bool = (false, parse_bool, [UNTRACKED],
1030         "parse only; do not compile, assemble, or link (default: no)"),
1031     perf_stats: bool = (false, parse_bool, [UNTRACKED],
1032         "print some performance-related statistics (default: no)"),
1033     plt: Option<bool> = (None, parse_opt_bool, [TRACKED],
1034         "whether to use the PLT when calling into shared libraries;
1035         only has effect for PIC code on systems with ELF binaries
1036         (default: PLT is disabled if full relro is enabled)"),
1037     polonius: bool = (false, parse_bool, [TRACKED],
1038         "enable polonius-based borrow-checker (default: no)"),
1039     polymorphize: bool = (false, parse_bool, [TRACKED],
1040           "perform polymorphization analysis"),
1041     pre_link_arg: (/* redirected to pre_link_args */) = ((), parse_string_push, [UNTRACKED],
1042         "a single extra argument to prepend the linker invocation (can be used several times)"),
1043     pre_link_args: Vec<String> = (Vec::new(), parse_list, [UNTRACKED],
1044         "extra arguments to prepend to the linker invocation (space separated)"),
1045     precise_enum_drop_elaboration: bool = (true, parse_bool, [TRACKED],
1046         "use a more precise version of drop elaboration for matches on enums (default: yes). \
1047         This results in better codegen, but has caused miscompilations on some tier 2 platforms. \
1048         See #77382 and #74551."),
1049     print_fuel: Option<String> = (None, parse_opt_string, [TRACKED],
1050         "make rustc print the total optimization fuel used by a crate"),
1051     print_link_args: bool = (false, parse_bool, [UNTRACKED],
1052         "print the arguments passed to the linker (default: no)"),
1053     print_llvm_passes: bool = (false, parse_bool, [UNTRACKED],
1054         "print the LLVM optimization passes being run (default: no)"),
1055     print_mono_items: Option<String> = (None, parse_opt_string, [UNTRACKED],
1056         "print the result of the monomorphization collection pass"),
1057     print_type_sizes: bool = (false, parse_bool, [UNTRACKED],
1058         "print layout information for each type encountered (default: no)"),
1059     proc_macro_backtrace: bool = (false, parse_bool, [UNTRACKED],
1060          "show backtraces for panics during proc-macro execution (default: no)"),
1061     profile: bool = (false, parse_bool, [TRACKED],
1062         "insert profiling code (default: no)"),
1063     profile_emit: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
1064         "file path to emit profiling data at runtime when using 'profile' \
1065         (default based on relative source path)"),
1066     query_dep_graph: bool = (false, parse_bool, [UNTRACKED],
1067         "enable queries of the dependency graph for regression testing (default: no)"),
1068     query_stats: bool = (false, parse_bool, [UNTRACKED],
1069         "print some statistics about the query system (default: no)"),
1070     relax_elf_relocations: Option<bool> = (None, parse_opt_bool, [TRACKED],
1071         "whether ELF relocations can be relaxed"),
1072     relro_level: Option<RelroLevel> = (None, parse_relro_level, [TRACKED],
1073         "choose which RELRO level to use"),
1074     report_delayed_bugs: bool = (false, parse_bool, [TRACKED],
1075         "immediately print bugs registered with `delay_span_bug` (default: no)"),
1076     sanitizer: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED],
1077         "use a sanitizer"),
1078     sanitizer_memory_track_origins: usize = (0, parse_sanitizer_memory_track_origins, [TRACKED],
1079         "enable origins tracking in MemorySanitizer"),
1080     sanitizer_recover: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED],
1081         "enable recovery for selected sanitizers"),
1082     saturating_float_casts: Option<bool> = (None, parse_opt_bool, [TRACKED],
1083         "make float->int casts UB-free: numbers outside the integer type's range are clipped to \
1084         the max/min integer respectively, and NaN is mapped to 0 (default: yes)"),
1085     save_analysis: bool = (false, parse_bool, [UNTRACKED],
1086         "write syntax and type analysis (in JSON format) information, in \
1087         addition to normal output (default: no)"),
1088     self_profile: SwitchWithOptPath = (SwitchWithOptPath::Disabled,
1089         parse_switch_with_opt_path, [UNTRACKED],
1090         "run the self profiler and output the raw event data"),
1091     // keep this in sync with the event filter names in librustc_data_structures/profiling.rs
1092     self_profile_events: Option<Vec<String>> = (None, parse_opt_comma_list, [UNTRACKED],
1093         "specify the events recorded by the self profiler;
1094         for example: `-Z self-profile-events=default,query-keys`
1095         all options: none, all, default, generic-activity, query-provider, query-cache-hit
1096                      query-blocked, incr-cache-load, query-keys, function-args, args, llvm"),
1097     share_generics: Option<bool> = (None, parse_opt_bool, [TRACKED],
1098         "make the current crate share its generic instantiations"),
1099     show_span: Option<String> = (None, parse_opt_string, [TRACKED],
1100         "show spans for compiler debugging (expr|pat|ty)"),
1101     span_debug: bool = (false, parse_bool, [UNTRACKED],
1102         "forward proc_macro::Span's `Debug` impl to `Span`"),
1103     // o/w tests have closure@path
1104     span_free_formats: bool = (false, parse_bool, [UNTRACKED],
1105         "exclude spans when debug-printing compiler state (default: no)"),
1106     src_hash_algorithm: Option<SourceFileHashAlgorithm> = (None, parse_src_file_hash, [TRACKED],
1107         "hash algorithm of source files in debug info (`md5`, `sha1`, or `sha256`)"),
1108     strip: Strip = (Strip::None, parse_strip, [UNTRACKED],
1109         "tell the linker which information to strip (`none` (default), `debuginfo` or `symbols`)"),
1110     split_dwarf_inlining: bool = (true, parse_bool, [UNTRACKED],
1111         "provide minimal debug info in the object/executable to facilitate online \
1112          symbolication/stack traces in the absence of .dwo/.dwp files when using Split DWARF"),
1113     symbol_mangling_version: Option<SymbolManglingVersion> = (None,
1114         parse_symbol_mangling_version, [TRACKED],
1115         "which mangling version to use for symbol names ('legacy' (default) or 'v0')"),
1116     teach: bool = (false, parse_bool, [TRACKED],
1117         "show extended diagnostic help (default: no)"),
1118     terminal_width: Option<usize> = (None, parse_opt_uint, [UNTRACKED],
1119         "set the current terminal width"),
1120     tune_cpu: Option<String> = (None, parse_opt_string, [TRACKED],
1121         "select processor to schedule for (`rustc --print target-cpus` for details)"),
1122     thinlto: Option<bool> = (None, parse_opt_bool, [TRACKED],
1123         "enable ThinLTO when possible"),
1124     // We default to 1 here since we want to behave like
1125     // a sequential compiler for now. This'll likely be adjusted
1126     // in the future. Note that -Zthreads=0 is the way to get
1127     // the num_cpus behavior.
1128     threads: usize = (1, parse_threads, [UNTRACKED],
1129         "use a thread pool with N threads"),
1130     time: bool = (false, parse_bool, [UNTRACKED],
1131         "measure time of rustc processes (default: no)"),
1132     time_llvm_passes: bool = (false, parse_bool, [UNTRACKED],
1133         "measure time of each LLVM pass (default: no)"),
1134     time_passes: bool = (false, parse_bool, [UNTRACKED],
1135         "measure time of each rustc pass (default: no)"),
1136     tls_model: Option<TlsModel> = (None, parse_tls_model, [TRACKED],
1137         "choose the TLS model to use (`rustc --print tls-models` for details)"),
1138     trace_macros: bool = (false, parse_bool, [UNTRACKED],
1139         "for every macro invocation, print its name and arguments (default: no)"),
1140     trap_unreachable: Option<bool> = (None, parse_opt_bool, [TRACKED],
1141         "generate trap instructions for unreachable intrinsics (default: use target setting, usually yes)"),
1142     treat_err_as_bug: Option<usize> = (None, parse_treat_err_as_bug, [TRACKED],
1143         "treat error number `val` that occurs as bug"),
1144     trim_diagnostic_paths: bool = (true, parse_bool, [UNTRACKED],
1145         "in diagnostics, use heuristics to shorten paths referring to items"),
1146     ui_testing: bool = (false, parse_bool, [UNTRACKED],
1147         "emit compiler diagnostics in a form suitable for UI testing (default: no)"),
1148     unleash_the_miri_inside_of_you: bool = (false, parse_bool, [TRACKED],
1149         "take the brakes off const evaluation. NOTE: this is unsound (default: no)"),
1150     unpretty: Option<String> = (None, parse_unpretty, [UNTRACKED],
1151         "present the input source, unstable (and less-pretty) variants;
1152         valid types are any of the types for `--pretty`, as well as:
1153         `expanded`, `expanded,identified`,
1154         `expanded,hygiene` (with internal representations),
1155         `everybody_loops` (all function bodies replaced with `loop {}`),
1156         `hir` (the HIR), `hir,identified`,
1157         `hir,typed` (HIR with types for each node),
1158         `hir-tree` (dump the raw HIR),
1159         `mir` (the MIR), or `mir-cfg` (graphviz formatted MIR)"),
1160     unsound_mir_opts: bool = (false, parse_bool, [TRACKED],
1161         "enable unsound and buggy MIR optimizations (default: no)"),
1162     unstable_options: bool = (false, parse_bool, [UNTRACKED],
1163         "adds unstable command line options to rustc interface (default: no)"),
1164     use_ctors_section: Option<bool> = (None, parse_opt_bool, [TRACKED],
1165         "use legacy .ctors section for initializers rather than .init_array"),
1166     validate_mir: bool = (false, parse_bool, [UNTRACKED],
1167         "validate MIR after each transformation"),
1168     verbose: bool = (false, parse_bool, [UNTRACKED],
1169         "in general, enable more debug printouts (default: no)"),
1170     verify_llvm_ir: bool = (false, parse_bool, [TRACKED],
1171         "verify LLVM IR (default: no)"),
1172     wasi_exec_model: Option<WasiExecModel> = (None, parse_wasi_exec_model, [TRACKED],
1173         "whether to build a wasi command or reactor"),
1174
1175     // This list is in alphabetical order.
1176     //
1177     // If you add a new option, please update:
1178     // - compiler/rustc_interface/src/tests.rs
1179 }
1180
1181 #[derive(Clone, Hash)]
1182 pub enum WasiExecModel {
1183     Command,
1184     Reactor,
1185 }