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::num::NonZeroUsize;
  20 use std::path::PathBuf;
  21 use std::str;
  22
  23 macro_rules! hash_option {
  24     ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, [UNTRACKED]) => {{}};
  25     ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, [TRACKED]) => {{
  26         if $sub_hashes
  27             .insert(stringify!($opt_name), $opt_expr as &dyn dep_tracking::DepTrackingHash)
  28             .is_some()
  29         {
  30             panic!("duplicate key in CLI DepTrackingHash: {}", stringify!($opt_name))
  31         }
  32     }};
  33 }
  34
  35 macro_rules! top_level_options {
  36     (pub struct Options { $(
  37         $opt:ident : $t:ty [$dep_tracking_marker:ident $($warn_val:expr, $warn_text:expr)*],
  38     )* } ) => (
  39         #[derive(Clone)]
  40         pub struct Options {
  41             $(pub $opt: $t),*
  42         }
  43
  44         impl Options {
  45             pub fn dep_tracking_hash(&self) -> u64 {
  46                 let mut sub_hashes = BTreeMap::new();
  47                 $({
  48                     hash_option!($opt,
  49                                  &self.$opt,
  50                                  &mut sub_hashes,
  51                                  [$dep_tracking_marker $($warn_val,
  52                                                          $warn_text,
  53                                                          self.error_format)*]);
  54                 })*
  55                 let mut hasher = DefaultHasher::new();
  56                 dep_tracking::stable_hash(sub_hashes,
  57                                           &mut hasher,
  58                                           self.error_format);
  59                 hasher.finish()
  60             }
  61         }
  62     );
  63 }
  64
  65 // The top-level command-line options struct.
  66 //
  67 // For each option, one has to specify how it behaves with regard to the
  68 // dependency tracking system of incremental compilation. This is done via the
  69 // square-bracketed directive after the field type. The options are:
  70 //
  71 // [TRACKED]
  72 // A change in the given field will cause the compiler to completely clear the
  73 // incremental compilation cache before proceeding.
  74 //
  75 // [UNTRACKED]
  76 // Incremental compilation is not influenced by this option.
  77 //
  78 // If you add a new option to this struct or one of the sub-structs like
  79 // `CodegenOptions`, think about how it influences incremental compilation. If in
  80 // doubt, specify [TRACKED], which is always "correct" but might lead to
  81 // unnecessary re-compilation.
  82 top_level_options!(
  83     pub struct Options {
  84         // The crate config requested for the session, which may be combined
  85         // with additional crate configurations during the compile process.
  86         crate_types: Vec<CrateType> [TRACKED],
  87         optimize: OptLevel [TRACKED],
  88         // Include the `debug_assertions` flag in dependency tracking, since it
  89         // can influence whether overflow checks are done or not.
  90         debug_assertions: bool [TRACKED],
  91         debuginfo: DebugInfo [TRACKED],
  92         lint_opts: Vec<(String, lint::Level)> [TRACKED],
  93         lint_cap: Option<lint::Level> [TRACKED],
  94         describe_lints: bool [UNTRACKED],
  95         output_types: OutputTypes [TRACKED],
  96         search_paths: Vec<SearchPath> [UNTRACKED],
  97         libs: Vec<(String, Option<String>, NativeLibKind)> [TRACKED],
  98         maybe_sysroot: Option<PathBuf> [UNTRACKED],
  99
 100         target_triple: TargetTriple [TRACKED],
 101
 102         test: bool [TRACKED],
 103         error_format: ErrorOutputType [UNTRACKED],
 104
 105         // If `Some`, enable incremental compilation, using the given
 106         // directory to store intermediate results.
 107         incremental: Option<PathBuf> [UNTRACKED],
 108
 109         debugging_opts: DebuggingOptions [TRACKED],
 110         prints: Vec<PrintRequest> [UNTRACKED],
 111         // Determines which borrow checker(s) to run. This is the parsed, sanitized
 112         // version of `debugging_opts.borrowck`, which is just a plain string.
 113         borrowck_mode: BorrowckMode [UNTRACKED],
 114         cg: CodegenOptions [TRACKED],
 115         externs: Externs [UNTRACKED],
 116         extern_dep_specs: ExternDepSpecs [UNTRACKED],
 117         crate_name: Option<String> [TRACKED],
 118         // An optional name to use as the crate for std during std injection,
 119         // written `extern crate name as std`. Defaults to `std`. Used by
 120         // out-of-tree drivers.
 121         alt_std_name: Option<String> [TRACKED],
 122         // Indicates how the compiler should treat unstable features.
 123         unstable_features: UnstableFeatures [TRACKED],
 124
 125         // Indicates whether this run of the compiler is actually rustdoc. This
 126         // is currently just a hack and will be removed eventually, so please
 127         // try to not rely on this too much.
 128         actually_rustdoc: bool [TRACKED],
 129
 130         // Control path trimming.
 131         trimmed_def_paths: TrimmedDefPaths [TRACKED],
 132
 133         // Specifications of codegen units / ThinLTO which are forced as a
 134         // result of parsing command line options. These are not necessarily
 135         // what rustc was invoked with, but massaged a bit to agree with
 136         // commands like `--emit llvm-ir` which they're often incompatible with
 137         // if we otherwise use the defaults of rustc.
 138         cli_forced_codegen_units: Option<usize> [UNTRACKED],
 139         cli_forced_thinlto_off: bool [UNTRACKED],
 140
 141         // Remap source path prefixes in all output (messages, object files, debug, etc.).
 142         remap_path_prefix: Vec<(PathBuf, PathBuf)> [UNTRACKED],
 143
 144         edition: Edition [TRACKED],
 145
 146         // `true` if we're emitting JSON blobs about each artifact produced
 147         // by the compiler.
 148         json_artifact_notifications: bool [TRACKED],
 149
 150         pretty: Option<PpMode> [UNTRACKED],
 151     }
 152 );
 153
 154 /// Defines all `CodegenOptions`/`DebuggingOptions` fields and parsers all at once. The goal of this
 155 /// macro is to define an interface that can be programmatically used by the option parser
 156 /// to initialize the struct without hardcoding field names all over the place.
 157 ///
 158 /// The goal is to invoke this macro once with the correct fields, and then this macro generates all
 159 /// necessary code. The main gotcha of this macro is the `cgsetters` module which is a bunch of
 160 /// generated code to parse an option into its respective field in the struct. There are a few
 161 /// hand-written parsers for parsing specific types of values in this module.
 162 macro_rules! options {
 163     ($struct_name:ident, $setter_name:ident, $defaultfn:ident,
 164      $buildfn:ident, $prefix:expr, $outputname:expr,
 165      $stat:ident, $mod_desc:ident, $mod_set:ident,
 166      $($opt:ident : $t:ty = (
 167         $init:expr,
 168         $parse:ident,
 169         [$dep_tracking_marker:ident $(($dep_warn_val:expr, $dep_warn_text:expr))*],
 170         $desc:expr)
 171      ),* ,) =>
 172 (
 173     #[derive(Clone)]
 174     pub struct $struct_name { $(pub $opt: $t),* }
 175
 176     pub fn $defaultfn() -> $struct_name {
 177         $struct_name { $($opt: $init),* }
 178     }
 179
 180     pub fn $buildfn(matches: &getopts::Matches, error_format: ErrorOutputType) -> $struct_name
 181     {
 182         let mut op = $defaultfn();
 183         for option in matches.opt_strs($prefix) {
 184             let (key, value) = match option.split_once('=') {
 185                 None => (option, None),
 186                 Some((k, v)) => (k.to_string(), Some(v)),
 187             };
 188             let option_to_lookup = key.replace("-", "_");
 189             let mut found = false;
 190             for &(candidate, setter, type_desc, _) in $stat {
 191                 if option_to_lookup != candidate { continue }
 192                 if !setter(&mut op, value) {
 193                     match value {
 194                         None => {
 195                             early_error(error_format, &format!("{0} option `{1}` requires \
 196                                                                 {2} ({3} {1}=<value>)",
 197                                                                $outputname, key,
 198                                                                type_desc, $prefix))
 199                         }
 200                         Some(value) => {
 201                             early_error(error_format, &format!("incorrect value `{}` for {} \
 202                                                                 option `{}` - {} was expected",
 203                                                                value, $outputname,
 204                                                                key, type_desc))
 205                         }
 206                     }
 207                 }
 208                 found = true;
 209                 break;
 210             }
 211             if !found {
 212                 early_error(error_format, &format!("unknown {} option: `{}`",
 213                                                    $outputname, key));
 214             }
 215         }
 216         return op;
 217     }
 218
 219     impl dep_tracking::DepTrackingHash for $struct_name {
 220         fn hash(&self, hasher: &mut DefaultHasher, error_format: ErrorOutputType) {
 221             let mut sub_hashes = BTreeMap::new();
 222             $({
 223                 hash_option!($opt,
 224                              &self.$opt,
 225                              &mut sub_hashes,
 226                              [$dep_tracking_marker $($dep_warn_val,
 227                                                      $dep_warn_text,
 228                                                      error_format)*]);
 229             })*
 230             dep_tracking::stable_hash(sub_hashes, hasher, error_format);
 231         }
 232     }
 233
 234     pub type $setter_name = fn(&mut $struct_name, v: Option<&str>) -> bool;
 235     pub const $stat: &[(&str, $setter_name, &str, &str)] =
 236         &[ $( (stringify!($opt), $mod_set::$opt, $mod_desc::$parse, $desc) ),* ];
 237
 238     #[allow(non_upper_case_globals, dead_code)]
 239     mod $mod_desc {
 240         pub const parse_no_flag: &str = "no value";
 241         pub const parse_bool: &str = "one of: `y`, `yes`, `on`, `n`, `no`, or `off`";
 242         pub const parse_opt_bool: &str = parse_bool;
 243         pub const parse_string: &str = "a string";
 244         pub const parse_opt_string: &str = parse_string;
 245         pub const parse_string_push: &str = parse_string;
 246         pub const parse_opt_pathbuf: &str = "a path";
 247         pub const parse_pathbuf_push: &str = parse_opt_pathbuf;
 248         pub const parse_list: &str = "a space-separated list of strings";
 249         pub const parse_opt_list: &str = parse_list;
 250         pub const parse_opt_comma_list: &str = "a comma-separated list of strings";
 251         pub const parse_uint: &str = "a number";
 252         pub const parse_opt_uint: &str = parse_uint;
 253         pub const parse_threads: &str = parse_uint;
 254         pub const parse_passes: &str = "a space-separated list of passes, or `all`";
 255         pub const parse_panic_strategy: &str = "either `unwind` or `abort`";
 256         pub const parse_relro_level: &str = "one of: `full`, `partial`, or `off`";
 257         pub const parse_sanitizers: &str = "comma separated list of sanitizers: `address`, `hwaddress`, `leak`, `memory` or `thread`";
 258         pub const parse_sanitizer_memory_track_origins: &str = "0, 1, or 2";
 259         pub const parse_cfguard: &str =
 260             "either a boolean (`yes`, `no`, `on`, `off`, etc), `checks`, or `nochecks`";
 261         pub const parse_strip: &str = "either `none`, `debuginfo`, or `symbols`";
 262         pub const parse_linker_flavor: &str = ::rustc_target::spec::LinkerFlavor::one_of();
 263         pub const parse_optimization_fuel: &str = "crate=integer";
 264         pub const parse_mir_spanview: &str = "`statement` (default), `terminator`, or `block`";
 265         pub const parse_unpretty: &str = "`string` or `string=string`";
 266         pub const parse_treat_err_as_bug: &str = "either no value or a number bigger than 0";
 267         pub const parse_lto: &str =
 268             "either a boolean (`yes`, `no`, `on`, `off`, etc), `thin`, `fat`, or omitted";
 269         pub const parse_linker_plugin_lto: &str =
 270             "either a boolean (`yes`, `no`, `on`, `off`, etc), or the path to the linker plugin";
 271         pub const parse_switch_with_opt_path: &str =
 272             "an optional path to the profiling data output directory";
 273         pub const parse_merge_functions: &str = "one of: `disabled`, `trampolines`, or `aliases`";
 274         pub const parse_symbol_mangling_version: &str = "either `legacy` or `v0` (RFC 2603)";
 275         pub const parse_src_file_hash: &str = "either `md5` or `sha1`";
 276         pub const parse_relocation_model: &str =
 277             "one of supported relocation models (`rustc --print relocation-models`)";
 278         pub const parse_code_model: &str =
 279             "one of supported code models (`rustc --print code-models`)";
 280         pub const parse_tls_model: &str =
 281             "one of supported TLS models (`rustc --print tls-models`)";
 282         pub const parse_target_feature: &str = parse_string;
 283         pub const parse_wasi_exec_model: &str = "either `command` or `reactor`";
 284         pub const parse_split_debuginfo: &str =
 285             "one of supported split-debuginfo modes (`off` or `dsymutil`)";
 286     }
 287
 288     #[allow(dead_code)]
 289     mod $mod_set {
 290         use super::*;
 291         use std::str::FromStr;
 292
 293         // Sometimes different options need to build a common structure.
 294         // That structure can kept in one of the options' fields, the others become dummy.
 295         macro_rules! redirect_field {
 296             ($cg:ident.link_arg) => { $cg.link_args };
 297             ($cg:ident.pre_link_arg) => { $cg.pre_link_args };
 298             ($cg:ident.$field:ident) => { $cg.$field };
 299         }
 300
 301         $(
 302             pub fn $opt(cg: &mut $struct_name, v: Option<&str>) -> bool {
 303                 $parse(&mut redirect_field!(cg.$opt), v)
 304             }
 305         )*
 306
 307         /// This is for boolean options that don't take a value and start with
 308         /// `no-`. This style of option is deprecated.
 309         fn parse_no_flag(slot: &mut bool, v: Option<&str>) -> bool {
 310             match v {
 311                 None => { *slot = true; true }
 312                 Some(_) => false,
 313             }
 314         }
 315
 316         /// Use this for any boolean option that has a static default.
 317         fn parse_bool(slot: &mut bool, v: Option<&str>) -> bool {
 318             match v {
 319                 Some("y") | Some("yes") | Some("on") | None => { *slot = true; true }
 320                 Some("n") | Some("no") | Some("off") => { *slot = false; true }
 321                 _ => false,
 322             }
 323         }
 324
 325         /// Use this for any boolean option that lacks a static default. (The
 326         /// actions taken when such an option is not specified will depend on
 327         /// other factors, such as other options, or target options.)
 328         fn parse_opt_bool(slot: &mut Option<bool>, v: Option<&str>) -> bool {
 329             match v {
 330                 Some("y") | Some("yes") | Some("on") | None => { *slot = Some(true); true }
 331                 Some("n") | Some("no") | Some("off") => { *slot = Some(false); true }
 332                 _ => false,
 333             }
 334         }
 335
 336         /// Use this for any string option that has a static default.
 337         fn parse_string(slot: &mut String, v: Option<&str>) -> bool {
 338             match v {
 339                 Some(s) => { *slot = s.to_string(); true },
 340                 None => false,
 341             }
 342         }
 343
 344         /// Use this for any string option that lacks a static default.
 345         fn parse_opt_string(slot: &mut Option<String>, v: Option<&str>) -> bool {
 346             match v {
 347                 Some(s) => { *slot = Some(s.to_string()); true },
 348                 None => false,
 349             }
 350         }
 351
 352         fn parse_opt_pathbuf(slot: &mut Option<PathBuf>, v: Option<&str>) -> bool {
 353             match v {
 354                 Some(s) => { *slot = Some(PathBuf::from(s)); true },
 355                 None => false,
 356             }
 357         }
 358
 359         fn parse_string_push(slot: &mut Vec<String>, v: Option<&str>) -> bool {
 360             match v {
 361                 Some(s) => { slot.push(s.to_string()); true },
 362                 None => false,
 363             }
 364         }
 365
 366         fn parse_pathbuf_push(slot: &mut Vec<PathBuf>, v: Option<&str>) -> bool {
 367             match v {
 368                 Some(s) => { slot.push(PathBuf::from(s)); true },
 369                 None => false,
 370             }
 371         }
 372
 373         fn parse_list(slot: &mut Vec<String>, v: Option<&str>)
 374                       -> bool {
 375             match v {
 376                 Some(s) => {
 377                     slot.extend(s.split_whitespace().map(|s| s.to_string()));
 378                     true
 379                 },
 380                 None => false,
 381             }
 382         }
 383
 384         fn parse_opt_list(slot: &mut Option<Vec<String>>, v: Option<&str>)
 385                       -> bool {
 386             match v {
 387                 Some(s) => {
 388                     let v = s.split_whitespace().map(|s| s.to_string()).collect();
 389                     *slot = Some(v);
 390                     true
 391                 },
 392                 None => false,
 393             }
 394         }
 395
 396         fn parse_opt_comma_list(slot: &mut Option<Vec<String>>, v: Option<&str>)
 397                       -> bool {
 398             match v {
 399                 Some(s) => {
 400                     let v = s.split(',').map(|s| s.to_string()).collect();
 401                     *slot = Some(v);
 402                     true
 403                 },
 404                 None => false,
 405             }
 406         }
 407
 408         fn parse_threads(slot: &mut usize, v: Option<&str>) -> bool {
 409             match v.and_then(|s| s.parse().ok()) {
 410                 Some(0) => { *slot = ::num_cpus::get(); true },
 411                 Some(i) => { *slot = i; true },
 412                 None => false
 413             }
 414         }
 415
 416         /// Use this for any uint option that has a static default.
 417         fn parse_uint(slot: &mut usize, v: Option<&str>) -> bool {
 418             match v.and_then(|s| s.parse().ok()) {
 419                 Some(i) => { *slot = i; true },
 420                 None => false
 421             }
 422         }
 423
 424         /// Use this for any uint option that lacks a static default.
 425         fn parse_opt_uint(slot: &mut Option<usize>, v: Option<&str>) -> bool {
 426             match v {
 427                 Some(s) => { *slot = s.parse().ok(); slot.is_some() }
 428                 None => false
 429             }
 430         }
 431
 432         fn parse_passes(slot: &mut Passes, v: Option<&str>) -> bool {
 433             match v {
 434                 Some("all") => {
 435                     *slot = Passes::All;
 436                     true
 437                 }
 438                 v => {
 439                     let mut passes = vec![];
 440                     if parse_list(&mut passes, v) {
 441                         *slot = Passes::Some(passes);
 442                         true
 443                     } else {
 444                         false
 445                     }
 446                 }
 447             }
 448         }
 449
 450         fn parse_panic_strategy(slot: &mut Option<PanicStrategy>, v: Option<&str>) -> bool {
 451             match v {
 452                 Some("unwind") => *slot = Some(PanicStrategy::Unwind),
 453                 Some("abort") => *slot = Some(PanicStrategy::Abort),
 454                 _ => return false
 455             }
 456             true
 457         }
 458
 459         fn parse_relro_level(slot: &mut Option<RelroLevel>, v: Option<&str>) -> bool {
 460             match v {
 461                 Some(s) => {
 462                     match s.parse::<RelroLevel>() {
 463                         Ok(level) => *slot = Some(level),
 464                         _ => return false
 465                     }
 466                 },
 467                 _ => return false
 468             }
 469             true
 470         }
 471
 472         fn parse_sanitizers(slot: &mut SanitizerSet, v: Option<&str>) -> bool {
 473             if let Some(v) = v {
 474                 for s in v.split(',') {
 475                     *slot |= match s {
 476                         "address" => SanitizerSet::ADDRESS,
 477                         "leak" => SanitizerSet::LEAK,
 478                         "memory" => SanitizerSet::MEMORY,
 479                         "thread" => SanitizerSet::THREAD,
 480                         "hwaddress" => SanitizerSet::HWADDRESS,
 481                         _ => return false,
 482                     }
 483                 }
 484                 true
 485             } else {
 486                 false
 487             }
 488         }
 489
 490         fn parse_sanitizer_memory_track_origins(slot: &mut usize, v: Option<&str>) -> bool {
 491             match v {
 492                 Some("2") | None => { *slot = 2; true }
 493                 Some("1") => { *slot = 1; true }
 494                 Some("0") => { *slot = 0; true }
 495                 Some(_) => false,
 496             }
 497         }
 498
 499         fn parse_strip(slot: &mut Strip, v: Option<&str>) -> bool {
 500             match v {
 501                 Some("none") => *slot = Strip::None,
 502                 Some("debuginfo") => *slot = Strip::Debuginfo,
 503                 Some("symbols") => *slot = Strip::Symbols,
 504                 _ => return false,
 505             }
 506             true
 507         }
 508
 509         fn parse_cfguard(slot: &mut CFGuard, v: Option<&str>) -> bool {
 510             if v.is_some() {
 511                 let mut bool_arg = None;
 512                 if parse_opt_bool(&mut bool_arg, v) {
 513                     *slot = if bool_arg.unwrap() {
 514                         CFGuard::Checks
 515                     } else {
 516                         CFGuard::Disabled
 517                     };
 518                     return true
 519                 }
 520             }
 521
 522             *slot = match v {
 523                 None => CFGuard::Checks,
 524                 Some("checks") => CFGuard::Checks,
 525                 Some("nochecks") => CFGuard::NoChecks,
 526                 Some(_) => return false,
 527             };
 528             true
 529         }
 530
 531         fn parse_linker_flavor(slote: &mut Option<LinkerFlavor>, v: Option<&str>) -> bool {
 532             match v.and_then(LinkerFlavor::from_str) {
 533                 Some(lf) => *slote = Some(lf),
 534                 _ => return false,
 535             }
 536             true
 537         }
 538
 539         fn parse_optimization_fuel(slot: &mut Option<(String, u64)>, v: Option<&str>) -> bool {
 540             match v {
 541                 None => false,
 542                 Some(s) => {
 543                     let parts = s.split('=').collect::<Vec<_>>();
 544                     if parts.len() != 2 { return false; }
 545                     let crate_name = parts[0].to_string();
 546                     let fuel = parts[1].parse::<u64>();
 547                     if fuel.is_err() { return false; }
 548                     *slot = Some((crate_name, fuel.unwrap()));
 549                     true
 550                 }
 551             }
 552         }
 553
 554         fn parse_unpretty(slot: &mut Option<String>, v: Option<&str>) -> bool {
 555             match v {
 556                 None => false,
 557                 Some(s) if s.split('=').count() <= 2 => {
 558                     *slot = Some(s.to_string());
 559                     true
 560                 }
 561                 _ => false,
 562             }
 563         }
 564
 565         fn parse_mir_spanview(slot: &mut Option<MirSpanview>, v: Option<&str>) -> bool {
 566             if v.is_some() {
 567                 let mut bool_arg = None;
 568                 if parse_opt_bool(&mut bool_arg, v) {
 569                     *slot = if bool_arg.unwrap() {
 570                         Some(MirSpanview::Statement)
 571                     } else {
 572                         None
 573                     };
 574                     return true
 575                 }
 576             }
 577
 578             let v = match v {
 579                 None => {
 580                     *slot = Some(MirSpanview::Statement);
 581                     return true;
 582                 }
 583                 Some(v) => v,
 584             };
 585
 586             *slot = Some(match v.trim_end_matches("s") {
 587                 "statement" | "stmt" => MirSpanview::Statement,
 588                 "terminator" | "term" => MirSpanview::Terminator,
 589                 "block" | "basicblock" => MirSpanview::Block,
 590                 _ => return false,
 591             });
 592             true
 593         }
 594
 595         fn parse_treat_err_as_bug(slot: &mut Option<NonZeroUsize>, v: Option<&str>) -> bool {
 596             match v {
 597                 Some(s) => { *slot = s.parse().ok(); slot.is_some() }
 598                 None => { *slot = NonZeroUsize::new(1); true }
 599             }
 600         }
 601
 602         fn parse_lto(slot: &mut LtoCli, v: Option<&str>) -> bool {
 603             if v.is_some() {
 604                 let mut bool_arg = None;
 605                 if parse_opt_bool(&mut bool_arg, v) {
 606                     *slot = if bool_arg.unwrap() {
 607                         LtoCli::Yes
 608                     } else {
 609                         LtoCli::No
 610                     };
 611                     return true
 612                 }
 613             }
 614
 615             *slot = match v {
 616                 None => LtoCli::NoParam,
 617                 Some("thin") => LtoCli::Thin,
 618                 Some("fat") => LtoCli::Fat,
 619                 Some(_) => return false,
 620             };
 621             true
 622         }
 623
 624         fn parse_linker_plugin_lto(slot: &mut LinkerPluginLto, v: Option<&str>) -> bool {
 625             if v.is_some() {
 626                 let mut bool_arg = None;
 627                 if parse_opt_bool(&mut bool_arg, v) {
 628                     *slot = if bool_arg.unwrap() {
 629                         LinkerPluginLto::LinkerPluginAuto
 630                     } else {
 631                         LinkerPluginLto::Disabled
 632                     };
 633                     return true
 634                 }
 635             }
 636
 637             *slot = match v {
 638                 None => LinkerPluginLto::LinkerPluginAuto,
 639                 Some(path) => LinkerPluginLto::LinkerPlugin(PathBuf::from(path)),
 640             };
 641             true
 642         }
 643
 644         fn parse_switch_with_opt_path(slot: &mut SwitchWithOptPath, v: Option<&str>) -> bool {
 645             *slot = match v {
 646                 None => SwitchWithOptPath::Enabled(None),
 647                 Some(path) => SwitchWithOptPath::Enabled(Some(PathBuf::from(path))),
 648             };
 649             true
 650         }
 651
 652         fn parse_merge_functions(slot: &mut Option<MergeFunctions>, v: Option<&str>) -> bool {
 653             match v.and_then(|s| MergeFunctions::from_str(s).ok()) {
 654                 Some(mergefunc) => *slot = Some(mergefunc),
 655                 _ => return false,
 656             }
 657             true
 658         }
 659
 660         fn parse_relocation_model(slot: &mut Option<RelocModel>, v: Option<&str>) -> bool {
 661             match v.and_then(|s| RelocModel::from_str(s).ok()) {
 662                 Some(relocation_model) => *slot = Some(relocation_model),
 663                 None if v == Some("default") => *slot = None,
 664                 _ => return false,
 665             }
 666             true
 667         }
 668
 669         fn parse_code_model(slot: &mut Option<CodeModel>, v: Option<&str>) -> bool {
 670             match v.and_then(|s| CodeModel::from_str(s).ok()) {
 671                 Some(code_model) => *slot = Some(code_model),
 672                 _ => return false,
 673             }
 674             true
 675         }
 676
 677         fn parse_tls_model(slot: &mut Option<TlsModel>, v: Option<&str>) -> bool {
 678             match v.and_then(|s| TlsModel::from_str(s).ok()) {
 679                 Some(tls_model) => *slot = Some(tls_model),
 680                 _ => return false,
 681             }
 682             true
 683         }
 684
 685         fn parse_symbol_mangling_version(
 686             slot: &mut Option<SymbolManglingVersion>,
 687             v: Option<&str>,
 688         ) -> bool {
 689             *slot = match v {
 690                 Some("legacy") => Some(SymbolManglingVersion::Legacy),
 691                 Some("v0") => Some(SymbolManglingVersion::V0),
 692                 _ => return false,
 693             };
 694             true
 695         }
 696
 697         fn parse_src_file_hash(slot: &mut Option<SourceFileHashAlgorithm>, v: Option<&str>) -> bool {
 698             match v.and_then(|s| SourceFileHashAlgorithm::from_str(s).ok()) {
 699                 Some(hash_kind) => *slot = Some(hash_kind),
 700                 _ => return false,
 701             }
 702             true
 703         }
 704
 705         fn parse_target_feature(slot: &mut String, v: Option<&str>) -> bool {
 706             match v {
 707                 Some(s) => {
 708                     if !slot.is_empty() {
 709                         slot.push_str(",");
 710                     }
 711                     slot.push_str(s);
 712                     true
 713                 }
 714                 None => false,
 715             }
 716         }
 717
 718         fn parse_wasi_exec_model(slot: &mut Option<WasiExecModel>, v: Option<&str>) -> bool {
 719             match v {
 720                 Some("command")  => *slot = Some(WasiExecModel::Command),
 721                 Some("reactor") => *slot = Some(WasiExecModel::Reactor),
 722                 _ => return false,
 723             }
 724             true
 725         }
 726
 727         fn parse_split_debuginfo(slot: &mut Option<SplitDebuginfo>, v: Option<&str>) -> bool {
 728             match v.and_then(|s| SplitDebuginfo::from_str(s).ok()) {
 729                 Some(e) => *slot = Some(e),
 730                 _ => return false,
 731             }
 732             true
 733         }
 734     }
 735 ) }
 736
 737 options! {CodegenOptions, CodegenSetter, basic_codegen_options,
 738           build_codegen_options, "C", "codegen",
 739           CG_OPTIONS, cg_type_desc, cgsetters,
 740
 741     // This list is in alphabetical order.
 742     //
 743     // If you add a new option, please update:
 744     // - compiler/rustc_interface/src/tests.rs
 745     // - src/doc/rustc/src/codegen-options/index.md
 746
 747     ar: String = (String::new(), parse_string, [UNTRACKED],
 748         "this option is deprecated and does nothing"),
 749     code_model: Option<CodeModel> = (None, parse_code_model, [TRACKED],
 750         "choose the code model to use (`rustc --print code-models` for details)"),
 751     codegen_units: Option<usize> = (None, parse_opt_uint, [UNTRACKED],
 752         "divide crate into N units to optimize in parallel"),
 753     control_flow_guard: CFGuard = (CFGuard::Disabled, parse_cfguard, [TRACKED],
 754         "use Windows Control Flow Guard (default: no)"),
 755     debug_assertions: Option<bool> = (None, parse_opt_bool, [TRACKED],
 756         "explicitly enable the `cfg(debug_assertions)` directive"),
 757     debuginfo: usize = (0, parse_uint, [TRACKED],
 758         "debug info emission level (0 = no debug info, 1 = line tables only, \
 759         2 = full debug info with variable and type information; default: 0)"),
 760     default_linker_libraries: bool = (false, parse_bool, [UNTRACKED],
 761         "allow the linker to link its default libraries (default: no)"),
 762     embed_bitcode: bool = (true, parse_bool, [TRACKED],
 763         "emit bitcode in rlibs (default: yes)"),
 764     extra_filename: String = (String::new(), parse_string, [UNTRACKED],
 765         "extra data to put in each output filename"),
 766     force_frame_pointers: Option<bool> = (None, parse_opt_bool, [TRACKED],
 767         "force use of the frame pointers"),
 768     force_unwind_tables: Option<bool> = (None, parse_opt_bool, [TRACKED],
 769         "force use of unwind tables"),
 770     incremental: Option<String> = (None, parse_opt_string, [UNTRACKED],
 771         "enable incremental compilation"),
 772     inline_threshold: Option<usize> = (None, parse_opt_uint, [TRACKED],
 773         "set the threshold for inlining a function"),
 774     link_arg: (/* redirected to link_args */) = ((), parse_string_push, [UNTRACKED],
 775         "a single extra argument to append to the linker invocation (can be used several times)"),
 776     link_args: Vec<String> = (Vec::new(), parse_list, [UNTRACKED],
 777         "extra arguments to append to the linker invocation (space separated)"),
 778     link_dead_code: Option<bool> = (None, parse_opt_bool, [UNTRACKED],
 779         "keep dead code at link time (useful for code coverage) (default: no)"),
 780     link_self_contained: Option<bool> = (None, parse_opt_bool, [UNTRACKED],
 781         "control whether to link Rust provided C objects/libraries or rely
 782         on C toolchain installed in the system"),
 783     linker: Option<PathBuf> = (None, parse_opt_pathbuf, [UNTRACKED],
 784         "system linker to link outputs with"),
 785     linker_flavor: Option<LinkerFlavor> = (None, parse_linker_flavor, [UNTRACKED],
 786         "linker flavor"),
 787     linker_plugin_lto: LinkerPluginLto = (LinkerPluginLto::Disabled,
 788         parse_linker_plugin_lto, [TRACKED],
 789         "generate build artifacts that are compatible with linker-based LTO"),
 790     llvm_args: Vec<String> = (Vec::new(), parse_list, [TRACKED],
 791         "a list of arguments to pass to LLVM (space separated)"),
 792     lto: LtoCli = (LtoCli::Unspecified, parse_lto, [TRACKED],
 793         "perform LLVM link-time optimizations"),
 794     metadata: Vec<String> = (Vec::new(), parse_list, [TRACKED],
 795         "metadata to mangle symbol names with"),
 796     no_prepopulate_passes: bool = (false, parse_no_flag, [TRACKED],
 797         "give an empty list of passes to the pass manager"),
 798     no_redzone: Option<bool> = (None, parse_opt_bool, [TRACKED],
 799         "disable the use of the redzone"),
 800     no_stack_check: bool = (false, parse_no_flag, [UNTRACKED],
 801         "this option is deprecated and does nothing"),
 802     no_vectorize_loops: bool = (false, parse_no_flag, [TRACKED],
 803         "disable loop vectorization optimization passes"),
 804     no_vectorize_slp: bool = (false, parse_no_flag, [TRACKED],
 805         "disable LLVM's SLP vectorization pass"),
 806     opt_level: String = ("0".to_string(), parse_string, [TRACKED],
 807         "optimization level (0-3, s, or z; default: 0)"),
 808     overflow_checks: Option<bool> = (None, parse_opt_bool, [TRACKED],
 809         "use overflow checks for integer arithmetic"),
 810     panic: Option<PanicStrategy> = (None, parse_panic_strategy, [TRACKED],
 811         "panic strategy to compile crate with"),
 812     passes: Vec<String> = (Vec::new(), parse_list, [TRACKED],
 813         "a list of extra LLVM passes to run (space separated)"),
 814     prefer_dynamic: bool = (false, parse_bool, [TRACKED],
 815         "prefer dynamic linking to static linking (default: no)"),
 816     profile_generate: SwitchWithOptPath = (SwitchWithOptPath::Disabled,
 817         parse_switch_with_opt_path, [TRACKED],
 818         "compile the program with profiling instrumentation"),
 819     profile_use: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
 820         "use the given `.profdata` file for profile-guided optimization"),
 821     relocation_model: Option<RelocModel> = (None, parse_relocation_model, [TRACKED],
 822         "control generation of position-independent code (PIC) \
 823         (`rustc --print relocation-models` for details)"),
 824     remark: Passes = (Passes::Some(Vec::new()), parse_passes, [UNTRACKED],
 825         "print remarks for these optimization passes (space separated, or \"all\")"),
 826     rpath: bool = (false, parse_bool, [UNTRACKED],
 827         "set rpath values in libs/exes (default: no)"),
 828     save_temps: bool = (false, parse_bool, [UNTRACKED],
 829         "save all temporary output files during compilation (default: no)"),
 830     soft_float: bool = (false, parse_bool, [TRACKED],
 831         "use soft float ABI (*eabihf targets only) (default: no)"),
 832     split_debuginfo: Option<SplitDebuginfo> = (None, parse_split_debuginfo, [TRACKED],
 833         "how to handle split-debuginfo, a platform-specific option"),
 834     target_cpu: Option<String> = (None, parse_opt_string, [TRACKED],
 835         "select target processor (`rustc --print target-cpus` for details)"),
 836     target_feature: String = (String::new(), parse_target_feature, [TRACKED],
 837         "target specific attributes. (`rustc --print target-features` for details). \
 838         This feature is unsafe."),
 839
 840     // This list is in alphabetical order.
 841     //
 842     // If you add a new option, please update:
 843     // - compiler/rustc_interface/src/tests.rs
 844     // - src/doc/rustc/src/codegen-options/index.md
 845 }
 846
 847 options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
 848           build_debugging_options, "Z", "debugging",
 849           DB_OPTIONS, db_type_desc, dbsetters,
 850
 851     // This list is in alphabetical order.
 852     //
 853     // If you add a new option, please update:
 854     // - compiler/rustc_interface/src/tests.rs
 855
 856     allow_features: Option<Vec<String>> = (None, parse_opt_comma_list, [TRACKED],
 857         "only allow the listed language features to be enabled in code (space separated)"),
 858     always_encode_mir: bool = (false, parse_bool, [TRACKED],
 859         "encode MIR of all functions into the crate metadata (default: no)"),
 860     assume_incomplete_release: bool = (false, parse_bool, [TRACKED],
 861         "make cfg(version) treat the current version as incomplete (default: no)"),
 862     asm_comments: bool = (false, parse_bool, [TRACKED],
 863         "generate comments into the assembly (may change behavior) (default: no)"),
 864     ast_json: bool = (false, parse_bool, [UNTRACKED],
 865         "print the AST as JSON and halt (default: no)"),
 866     ast_json_noexpand: bool = (false, parse_bool, [UNTRACKED],
 867         "print the pre-expansion AST as JSON and halt (default: no)"),
 868     binary_dep_depinfo: bool = (false, parse_bool, [TRACKED],
 869         "include artifacts (sysroot, crate dependencies) used during compilation in dep-info \
 870         (default: no)"),
 871     borrowck: String = ("migrate".to_string(), parse_string, [UNTRACKED],
 872         "select which borrowck is used (`mir` or `migrate`) (default: `migrate`)"),
 873     borrowck_stats: bool = (false, parse_bool, [UNTRACKED],
 874         "gather borrowck statistics (default: no)"),
 875     cgu_partitioning_strategy: Option<String> = (None, parse_opt_string, [TRACKED],
 876         "the codegen unit partitioning strategy to use"),
 877     chalk: bool = (false, parse_bool, [TRACKED],
 878         "enable the experimental Chalk-based trait solving engine"),
 879     codegen_backend: Option<String> = (None, parse_opt_string, [TRACKED],
 880         "the backend to use"),
 881     combine_cgu: bool = (false, parse_bool, [TRACKED],
 882         "combine CGUs into a single one"),
 883     crate_attr: Vec<String> = (Vec::new(), parse_string_push, [TRACKED],
 884         "inject the given attribute in the crate"),
 885     debug_macros: bool = (false, parse_bool, [TRACKED],
 886         "emit line numbers debug info inside macros (default: no)"),
 887     deduplicate_diagnostics: bool = (true, parse_bool, [UNTRACKED],
 888         "deduplicate identical diagnostics (default: yes)"),
 889     dep_info_omit_d_target: bool = (false, parse_bool, [TRACKED],
 890         "in dep-info output, omit targets for tracking dependencies of the dep-info files \
 891         themselves (default: no)"),
 892     dep_tasks: bool = (false, parse_bool, [UNTRACKED],
 893         "print tasks that execute and the color their dep node gets (requires debug build) \
 894         (default: no)"),
 895     dont_buffer_diagnostics: bool = (false, parse_bool, [UNTRACKED],
 896         "emit diagnostics rather than buffering (breaks NLL error downgrading, sorting) \
 897         (default: no)"),
 898     dual_proc_macros: bool = (false, parse_bool, [TRACKED],
 899         "load proc macros for both target and host, but only link to the target (default: no)"),
 900     dump_dep_graph: bool = (false, parse_bool, [UNTRACKED],
 901         "dump the dependency graph to $RUST_DEP_GRAPH (default: /tmp/dep_graph.gv) \
 902         (default: no)"),
 903     dump_mir: Option<String> = (None, parse_opt_string, [UNTRACKED],
 904         "dump MIR state to file.
 905         `val` is used to select which passes and functions to dump. For example:
 906         `all` matches all passes and functions,
 907         `foo` matches all passes for functions whose name contains 'foo',
 908         `foo & ConstProp` only the 'ConstProp' pass for function names containing 'foo',
 909         `foo | bar` all passes for function names containing 'foo' or 'bar'."),
 910     dump_mir_dataflow: bool = (false, parse_bool, [UNTRACKED],
 911         "in addition to `.mir` files, create graphviz `.dot` files with dataflow results \
 912         (default: no)"),
 913     dump_mir_dir: String = ("mir_dump".to_string(), parse_string, [UNTRACKED],
 914         "the directory the MIR is dumped into (default: `mir_dump`)"),
 915     dump_mir_exclude_pass_number: bool = (false, parse_bool, [UNTRACKED],
 916         "exclude the pass number when dumping MIR (used in tests) (default: no)"),
 917     dump_mir_graphviz: bool = (false, parse_bool, [UNTRACKED],
 918         "in addition to `.mir` files, create graphviz `.dot` files (and with \
 919         `-Z instrument-coverage`, also create a `.dot` file for the MIR-derived \
 920         coverage graph) (default: no)"),
 921     dump_mir_spanview: Option<MirSpanview> = (None, parse_mir_spanview, [UNTRACKED],
 922         "in addition to `.mir` files, create `.html` files to view spans for \
 923         all `statement`s (including terminators), only `terminator` spans, or \
 924         computed `block` spans (one span encompassing a block's terminator and \
 925         all statements). If `-Z instrument-coverage` is also enabled, create \
 926         an additional `.html` file showing the computed coverage spans."),
 927     emit_future_incompat_report: bool = (false, parse_bool, [UNTRACKED],
 928         "emits a future-incompatibility report for lints (RFC 2834)"),
 929     emit_stack_sizes: bool = (false, parse_bool, [UNTRACKED],
 930         "emit a section containing stack size metadata (default: no)"),
 931     fewer_names: Option<bool> = (None, parse_opt_bool, [TRACKED],
 932         "reduce memory use by retaining fewer names within compilation artifacts (LLVM-IR) \
 933         (default: no)"),
 934     force_overflow_checks: Option<bool> = (None, parse_opt_bool, [TRACKED],
 935         "force overflow checks on or off"),
 936     force_unstable_if_unmarked: bool = (false, parse_bool, [TRACKED],
 937         "force all crates to be `rustc_private` unstable (default: no)"),
 938     fuel: Option<(String, u64)> = (None, parse_optimization_fuel, [TRACKED],
 939         "set the optimization fuel quota for a crate"),
 940     function_sections: Option<bool> = (None, parse_opt_bool, [TRACKED],
 941         "whether each function should go in its own section"),
 942     graphviz_dark_mode: bool = (false, parse_bool, [UNTRACKED],
 943         "use dark-themed colors in graphviz output (default: no)"),
 944     graphviz_font: String = ("Courier, monospace".to_string(), parse_string, [UNTRACKED],
 945         "use the given `fontname` in graphviz output; can be overridden by setting \
 946         environment variable `RUSTC_GRAPHVIZ_FONT` (default: `Courier, monospace`)"),
 947     hir_stats: bool = (false, parse_bool, [UNTRACKED],
 948         "print some statistics about AST and HIR (default: no)"),
 949     human_readable_cgu_names: bool = (false, parse_bool, [TRACKED],
 950         "generate human-readable, predictable names for codegen units (default: no)"),
 951     identify_regions: bool = (false, parse_bool, [UNTRACKED],
 952         "display unnamed regions as `'<id>`, using a non-ident unique id (default: no)"),
 953     incremental_ignore_spans: bool = (false, parse_bool, [UNTRACKED],
 954         "ignore spans during ICH computation -- used for testing (default: no)"),
 955     incremental_info: bool = (false, parse_bool, [UNTRACKED],
 956         "print high-level information about incremental reuse (or the lack thereof) \
 957         (default: no)"),
 958     incremental_verify_ich: bool = (false, parse_bool, [UNTRACKED],
 959         "verify incr. comp. hashes of green query instances (default: no)"),
 960     inline_mir: Option<bool> = (None, parse_opt_bool, [TRACKED],
 961         "enable MIR inlining (default: no)"),
 962     inline_mir_threshold: Option<usize> = (None, parse_opt_uint, [TRACKED],
 963         "a default MIR inlining threshold (default: 50)"),
 964     inline_mir_hint_threshold: Option<usize> = (None, parse_opt_uint, [TRACKED],
 965         "inlining threshold for functions with inline hint (default: 100)"),
 966     inline_in_all_cgus: Option<bool> = (None, parse_opt_bool, [TRACKED],
 967         "control whether `#[inline]` functions are in all CGUs"),
 968     input_stats: bool = (false, parse_bool, [UNTRACKED],
 969         "gather statistics about the input (default: no)"),
 970     instrument_coverage: bool = (false, parse_bool, [TRACKED],
 971         "instrument the generated code to support LLVM source-based code coverage \
 972         reports (note, the compiler build config must include `profiler = true`, \
 973         and is mutually exclusive with `-C profile-generate`/`-C profile-use`); \
 974         implies `-Z symbol-mangling-version=v0`; disables/overrides some Rust \
 975         optimizations (default: no)"),
 976     instrument_mcount: bool = (false, parse_bool, [TRACKED],
 977         "insert function instrument code for mcount-based tracing (default: no)"),
 978     keep_hygiene_data: bool = (false, parse_bool, [UNTRACKED],
 979         "keep hygiene data after analysis (default: no)"),
 980     link_native_libraries: bool = (true, parse_bool, [UNTRACKED],
 981         "link native libraries in the linker invocation (default: yes)"),
 982     link_only: bool = (false, parse_bool, [TRACKED],
 983         "link the `.rlink` file generated by `-Z no-link` (default: no)"),
 984     llvm_time_trace: bool = (false, parse_bool, [UNTRACKED],
 985         "generate JSON tracing data file from LLVM data (default: no)"),
 986     ls: bool = (false, parse_bool, [UNTRACKED],
 987         "list the symbols defined by a library crate (default: no)"),
 988     macro_backtrace: bool = (false, parse_bool, [UNTRACKED],
 989         "show macro backtraces (default: no)"),
 990     merge_functions: Option<MergeFunctions> = (None, parse_merge_functions, [TRACKED],
 991         "control the operation of the MergeFunctions LLVM pass, taking \
 992         the same values as the target option of the same name"),
 993     meta_stats: bool = (false, parse_bool, [UNTRACKED],
 994         "gather metadata statistics (default: no)"),
 995     mir_emit_retag: bool = (false, parse_bool, [TRACKED],
 996         "emit Retagging MIR statements, interpreted e.g., by miri; implies -Zmir-opt-level=0 \
 997         (default: no)"),
 998     mir_opt_level: Option<usize> = (None, parse_opt_uint, [TRACKED],
 999         "MIR optimization level (0-4; default: 1 in non optimized builds and 2 in optimized builds)"),
1000     mutable_noalias: bool = (false, parse_bool, [TRACKED],
1001         "emit noalias metadata for mutable references (default: no)"),
1002     new_llvm_pass_manager: bool = (false, parse_bool, [TRACKED],
1003         "use new LLVM pass manager (default: no)"),
1004     nll_facts: bool = (false, parse_bool, [UNTRACKED],
1005         "dump facts from NLL analysis into side files (default: no)"),
1006     nll_facts_dir: String = ("nll-facts".to_string(), parse_string, [UNTRACKED],
1007         "the directory the NLL facts are dumped into (default: `nll-facts`)"),
1008     no_analysis: bool = (false, parse_no_flag, [UNTRACKED],
1009         "parse and expand the source, but run no analysis"),
1010     no_codegen: bool = (false, parse_no_flag, [TRACKED],
1011         "run all passes except codegen; no output"),
1012     no_generate_arange_section: bool = (false, parse_no_flag, [TRACKED],
1013         "omit DWARF address ranges that give faster lookups"),
1014     no_interleave_lints: bool = (false, parse_no_flag, [UNTRACKED],
1015         "execute lints separately; allows benchmarking individual lints"),
1016     no_leak_check: bool = (false, parse_no_flag, [UNTRACKED],
1017         "disable the 'leak check' for subtyping; unsound, but useful for tests"),
1018     no_link: bool = (false, parse_no_flag, [TRACKED],
1019         "compile without linking"),
1020     no_parallel_llvm: bool = (false, parse_no_flag, [UNTRACKED],
1021         "run LLVM in non-parallel mode (while keeping codegen-units and ThinLTO)"),
1022     no_profiler_runtime: bool = (false, parse_no_flag, [TRACKED],
1023         "prevent automatic injection of the profiler_builtins crate"),
1024     normalize_docs: bool = (false, parse_bool, [TRACKED],
1025         "normalize associated items in rustdoc when generating documentation"),
1026     osx_rpath_install_name: bool = (false, parse_bool, [TRACKED],
1027         "pass `-install_name @rpath/...` to the macOS linker (default: no)"),
1028     panic_abort_tests: bool = (false, parse_bool, [TRACKED],
1029         "support compiling tests with panic=abort (default: no)"),
1030     parse_only: bool = (false, parse_bool, [UNTRACKED],
1031         "parse only; do not compile, assemble, or link (default: no)"),
1032     perf_stats: bool = (false, parse_bool, [UNTRACKED],
1033         "print some performance-related statistics (default: no)"),
1034     plt: Option<bool> = (None, parse_opt_bool, [TRACKED],
1035         "whether to use the PLT when calling into shared libraries;
1036         only has effect for PIC code on systems with ELF binaries
1037         (default: PLT is disabled if full relro is enabled)"),
1038     polonius: bool = (false, parse_bool, [TRACKED],
1039         "enable polonius-based borrow-checker (default: no)"),
1040     polymorphize: bool = (false, parse_bool, [TRACKED],
1041           "perform polymorphization analysis"),
1042     pre_link_arg: (/* redirected to pre_link_args */) = ((), parse_string_push, [UNTRACKED],
1043         "a single extra argument to prepend the linker invocation (can be used several times)"),
1044     pre_link_args: Vec<String> = (Vec::new(), parse_list, [UNTRACKED],
1045         "extra arguments to prepend to the linker invocation (space separated)"),
1046     precise_enum_drop_elaboration: bool = (true, parse_bool, [TRACKED],
1047         "use a more precise version of drop elaboration for matches on enums (default: yes). \
1048         This results in better codegen, but has caused miscompilations on some tier 2 platforms. \
1049         See #77382 and #74551."),
1050     print_fuel: Option<String> = (None, parse_opt_string, [TRACKED],
1051         "make rustc print the total optimization fuel used by a crate"),
1052     print_link_args: bool = (false, parse_bool, [UNTRACKED],
1053         "print the arguments passed to the linker (default: no)"),
1054     print_llvm_passes: bool = (false, parse_bool, [UNTRACKED],
1055         "print the LLVM optimization passes being run (default: no)"),
1056     print_mono_items: Option<String> = (None, parse_opt_string, [UNTRACKED],
1057         "print the result of the monomorphization collection pass"),
1058     print_type_sizes: bool = (false, parse_bool, [UNTRACKED],
1059         "print layout information for each type encountered (default: no)"),
1060     proc_macro_backtrace: bool = (false, parse_bool, [UNTRACKED],
1061          "show backtraces for panics during proc-macro execution (default: no)"),
1062     profile: bool = (false, parse_bool, [TRACKED],
1063         "insert profiling code (default: no)"),
1064     profile_emit: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
1065         "file path to emit profiling data at runtime when using 'profile' \
1066         (default based on relative source path)"),
1067     query_dep_graph: bool = (false, parse_bool, [UNTRACKED],
1068         "enable queries of the dependency graph for regression testing (default: no)"),
1069     query_stats: bool = (false, parse_bool, [UNTRACKED],
1070         "print some statistics about the query system (default: no)"),
1071     relax_elf_relocations: Option<bool> = (None, parse_opt_bool, [TRACKED],
1072         "whether ELF relocations can be relaxed"),
1073     relro_level: Option<RelroLevel> = (None, parse_relro_level, [TRACKED],
1074         "choose which RELRO level to use"),
1075     report_delayed_bugs: bool = (false, parse_bool, [TRACKED],
1076         "immediately print bugs registered with `delay_span_bug` (default: no)"),
1077     sanitizer: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED],
1078         "use a sanitizer"),
1079     sanitizer_memory_track_origins: usize = (0, parse_sanitizer_memory_track_origins, [TRACKED],
1080         "enable origins tracking in MemorySanitizer"),
1081     sanitizer_recover: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED],
1082         "enable recovery for selected sanitizers"),
1083     saturating_float_casts: Option<bool> = (None, parse_opt_bool, [TRACKED],
1084         "make float->int casts UB-free: numbers outside the integer type's range are clipped to \
1085         the max/min integer respectively, and NaN is mapped to 0 (default: yes)"),
1086     save_analysis: bool = (false, parse_bool, [UNTRACKED],
1087         "write syntax and type analysis (in JSON format) information, in \
1088         addition to normal output (default: no)"),
1089     self_profile: SwitchWithOptPath = (SwitchWithOptPath::Disabled,
1090         parse_switch_with_opt_path, [UNTRACKED],
1091         "run the self profiler and output the raw event data"),
1092     // keep this in sync with the event filter names in librustc_data_structures/profiling.rs
1093     self_profile_events: Option<Vec<String>> = (None, parse_opt_comma_list, [UNTRACKED],
1094         "specify the events recorded by the self profiler;
1095         for example: `-Z self-profile-events=default,query-keys`
1096         all options: none, all, default, generic-activity, query-provider, query-cache-hit
1097                      query-blocked, incr-cache-load, query-keys, function-args, args, llvm"),
1098     share_generics: Option<bool> = (None, parse_opt_bool, [TRACKED],
1099         "make the current crate share its generic instantiations"),
1100     show_span: Option<String> = (None, parse_opt_string, [TRACKED],
1101         "show spans for compiler debugging (expr|pat|ty)"),
1102     span_debug: bool = (false, parse_bool, [UNTRACKED],
1103         "forward proc_macro::Span's `Debug` impl to `Span`"),
1104     // o/w tests have closure@path
1105     span_free_formats: bool = (false, parse_bool, [UNTRACKED],
1106         "exclude spans when debug-printing compiler state (default: no)"),
1107     src_hash_algorithm: Option<SourceFileHashAlgorithm> = (None, parse_src_file_hash, [TRACKED],
1108         "hash algorithm of source files in debug info (`md5`, `sha1`, or `sha256`)"),
1109     strip: Strip = (Strip::None, parse_strip, [UNTRACKED],
1110         "tell the linker which information to strip (`none` (default), `debuginfo` or `symbols`)"),
1111     split_dwarf_inlining: bool = (true, parse_bool, [UNTRACKED],
1112         "provide minimal debug info in the object/executable to facilitate online \
1113          symbolication/stack traces in the absence of .dwo/.dwp files when using Split DWARF"),
1114     symbol_mangling_version: Option<SymbolManglingVersion> = (None,
1115         parse_symbol_mangling_version, [TRACKED],
1116         "which mangling version to use for symbol names ('legacy' (default) or 'v0')"),
1117     teach: bool = (false, parse_bool, [TRACKED],
1118         "show extended diagnostic help (default: no)"),
1119     terminal_width: Option<usize> = (None, parse_opt_uint, [UNTRACKED],
1120         "set the current terminal width"),
1121     tune_cpu: Option<String> = (None, parse_opt_string, [TRACKED],
1122         "select processor to schedule for (`rustc --print target-cpus` for details)"),
1123     thinlto: Option<bool> = (None, parse_opt_bool, [TRACKED],
1124         "enable ThinLTO when possible"),
1125     // We default to 1 here since we want to behave like
1126     // a sequential compiler for now. This'll likely be adjusted
1127     // in the future. Note that -Zthreads=0 is the way to get
1128     // the num_cpus behavior.
1129     threads: usize = (1, parse_threads, [UNTRACKED],
1130         "use a thread pool with N threads"),
1131     time: bool = (false, parse_bool, [UNTRACKED],
1132         "measure time of rustc processes (default: no)"),
1133     time_llvm_passes: bool = (false, parse_bool, [UNTRACKED],
1134         "measure time of each LLVM pass (default: no)"),
1135     time_passes: bool = (false, parse_bool, [UNTRACKED],
1136         "measure time of each rustc pass (default: no)"),
1137     tls_model: Option<TlsModel> = (None, parse_tls_model, [TRACKED],
1138         "choose the TLS model to use (`rustc --print tls-models` for details)"),
1139     trace_macros: bool = (false, parse_bool, [UNTRACKED],
1140         "for every macro invocation, print its name and arguments (default: no)"),
1141     trap_unreachable: Option<bool> = (None, parse_opt_bool, [TRACKED],
1142         "generate trap instructions for unreachable intrinsics (default: use target setting, usually yes)"),
1143     treat_err_as_bug: Option<NonZeroUsize> = (None, parse_treat_err_as_bug, [TRACKED],
1144         "treat error number `val` that occurs as bug"),
1145     trim_diagnostic_paths: bool = (true, parse_bool, [UNTRACKED],
1146         "in diagnostics, use heuristics to shorten paths referring to items"),
1147     ui_testing: bool = (false, parse_bool, [UNTRACKED],
1148         "emit compiler diagnostics in a form suitable for UI testing (default: no)"),
1149     unleash_the_miri_inside_of_you: bool = (false, parse_bool, [TRACKED],
1150         "take the brakes off const evaluation. NOTE: this is unsound (default: no)"),
1151     unpretty: Option<String> = (None, parse_unpretty, [UNTRACKED],
1152         "present the input source, unstable (and less-pretty) variants;
1153         valid types are any of the types for `--pretty`, as well as:
1154         `expanded`, `expanded,identified`,
1155         `expanded,hygiene` (with internal representations),
1156         `everybody_loops` (all function bodies replaced with `loop {}`),
1157         `ast-tree` (raw AST before expansion),
1158         `ast-tree,expanded` (raw AST after expansion),
1159         `hir` (the HIR), `hir,identified`,
1160         `hir,typed` (HIR with types for each node),
1161         `hir-tree` (dump the raw HIR),
1162         `mir` (the MIR), or `mir-cfg` (graphviz formatted MIR)"),
1163     unsound_mir_opts: bool = (false, parse_bool, [TRACKED],
1164         "enable unsound and buggy MIR optimizations (default: no)"),
1165     unstable_options: bool = (false, parse_bool, [UNTRACKED],
1166         "adds unstable command line options to rustc interface (default: no)"),
1167     use_ctors_section: Option<bool> = (None, parse_opt_bool, [TRACKED],
1168         "use legacy .ctors section for initializers rather than .init_array"),
1169     validate_mir: bool = (false, parse_bool, [UNTRACKED],
1170         "validate MIR after each transformation"),
1171     verbose: bool = (false, parse_bool, [UNTRACKED],
1172         "in general, enable more debug printouts (default: no)"),
1173     verify_llvm_ir: bool = (false, parse_bool, [TRACKED],
1174         "verify LLVM IR (default: no)"),
1175     wasi_exec_model: Option<WasiExecModel> = (None, parse_wasi_exec_model, [TRACKED],
1176         "whether to build a wasi command or reactor"),
1177
1178     // This list is in alphabetical order.
1179     //
1180     // If you add a new option, please update:
1181     // - compiler/rustc_interface/src/tests.rs
1182 }
1183
1184 #[derive(Clone, Hash)]
1185 pub enum WasiExecModel {
1186     Command,
1187     Reactor,
1188 }