3 use crate::early_error;
5 use crate::search_paths::SearchPath;
6 use crate::utils::NativeLib;
8 use rustc_target::spec::{CodeModel, LinkerFlavor, MergeFunctions, PanicStrategy, SanitizerSet};
9 use rustc_target::spec::{RelocModel, RelroLevel, SplitDebuginfo, TargetTriple, TlsModel};
11 use rustc_feature::UnstableFeatures;
12 use rustc_span::edition::Edition;
13 use rustc_span::SourceFileHashAlgorithm;
15 use std::collections::BTreeMap;
17 use std::collections::hash_map::DefaultHasher;
18 use std::hash::Hasher;
19 use std::num::NonZeroUsize;
20 use std::path::PathBuf;
24 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr) => {
26 .insert(stringify!($opt_name), $opt_expr as &dyn dep_tracking::DepTrackingHash)
29 panic!("duplicate key in CLI DepTrackingHash: {}", stringify!($opt_name))
34 macro_rules! hash_opt {
35 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, $_for_crate_hash: ident, [UNTRACKED]) => {{}};
36 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, $_for_crate_hash: ident, [TRACKED]) => {{ insert!($opt_name, $opt_expr, $sub_hashes) }};
37 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, $for_crate_hash: ident, [TRACKED_NO_CRATE_HASH]) => {{
39 insert!($opt_name, $opt_expr, $sub_hashes)
42 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, $_for_crate_hash: ident, [SUBSTRUCT]) => {{}};
45 macro_rules! hash_substruct {
46 ($opt_name:ident, $opt_expr:expr, $error_format:expr, $for_crate_hash:expr, $hasher:expr, [UNTRACKED]) => {{}};
47 ($opt_name:ident, $opt_expr:expr, $error_format:expr, $for_crate_hash:expr, $hasher:expr, [TRACKED]) => {{}};
48 ($opt_name:ident, $opt_expr:expr, $error_format:expr, $for_crate_hash:expr, $hasher:expr, [TRACKED_NO_CRATE_HASH]) => {{}};
49 ($opt_name:ident, $opt_expr:expr, $error_format:expr, $for_crate_hash:expr, $hasher:expr, [SUBSTRUCT]) => {
50 use crate::config::dep_tracking::DepTrackingHash;
51 $opt_expr.dep_tracking_hash($for_crate_hash, $error_format).hash($hasher, $error_format);
55 macro_rules! top_level_options {
56 ( $( #[$top_level_attr:meta] )* pub struct Options { $(
58 $opt:ident : $t:ty [$dep_tracking_marker:ident],
61 $( #[$top_level_attr] )*
70 pub fn dep_tracking_hash(&self, for_crate_hash: bool) -> u64 {
71 let mut sub_hashes = BTreeMap::new();
77 [$dep_tracking_marker]);
79 let mut hasher = DefaultHasher::new();
80 dep_tracking::stable_hash(sub_hashes,
89 [$dep_tracking_marker]);
98 /// The top-level command-line options struct.
100 /// For each option, one has to specify how it behaves with regard to the
101 /// dependency tracking system of incremental compilation. This is done via the
102 /// square-bracketed directive after the field type. The options are:
105 /// A change in the given field will cause the compiler to completely clear the
106 /// incremental compilation cache before proceeding.
108 /// - `[TRACKED_NO_CRATE_HASH]`
109 /// Same as `[TRACKED]`, but will not affect the crate hash. This is useful for options that only
110 /// affect the incremental cache.
113 /// Incremental compilation is not influenced by this option.
116 /// Second-level sub-structs containing more options.
118 /// If you add a new option to this struct or one of the sub-structs like
119 /// `CodegenOptions`, think about how it influences incremental compilation. If in
120 /// doubt, specify `[TRACKED]`, which is always "correct" but might lead to
121 /// unnecessary re-compilation.
123 /// The crate config requested for the session, which may be combined
124 /// with additional crate configurations during the compile process.
125 crate_types: Vec<CrateType> [TRACKED],
126 optimize: OptLevel [TRACKED],
127 /// Include the `debug_assertions` flag in dependency tracking, since it
128 /// can influence whether overflow checks are done or not.
129 debug_assertions: bool [TRACKED],
130 debuginfo: DebugInfo [TRACKED],
131 lint_opts: Vec<(String, lint::Level)> [TRACKED],
132 lint_cap: Option<lint::Level> [TRACKED],
133 describe_lints: bool [UNTRACKED],
134 output_types: OutputTypes [TRACKED],
135 search_paths: Vec<SearchPath> [UNTRACKED],
136 libs: Vec<NativeLib> [TRACKED],
137 maybe_sysroot: Option<PathBuf> [UNTRACKED],
139 target_triple: TargetTriple [TRACKED],
141 test: bool [TRACKED],
142 error_format: ErrorOutputType [UNTRACKED],
144 /// If `Some`, enable incremental compilation, using the given
145 /// directory to store intermediate results.
146 incremental: Option<PathBuf> [UNTRACKED],
148 debugging_opts: DebuggingOptions [SUBSTRUCT],
149 prints: Vec<PrintRequest> [UNTRACKED],
150 /// Determines which borrow checker(s) to run. This is the parsed, sanitized
151 /// version of `debugging_opts.borrowck`, which is just a plain string.
152 borrowck_mode: BorrowckMode [UNTRACKED],
153 cg: CodegenOptions [SUBSTRUCT],
154 externs: Externs [UNTRACKED],
155 extern_dep_specs: ExternDepSpecs [UNTRACKED],
156 crate_name: Option<String> [TRACKED],
157 /// An optional name to use as the crate for std during std injection,
158 /// written `extern crate name as std`. Defaults to `std`. Used by
159 /// out-of-tree drivers.
160 alt_std_name: Option<String> [TRACKED],
161 /// Indicates how the compiler should treat unstable features.
162 unstable_features: UnstableFeatures [TRACKED],
164 /// Indicates whether this run of the compiler is actually rustdoc. This
165 /// is currently just a hack and will be removed eventually, so please
166 /// try to not rely on this too much.
167 actually_rustdoc: bool [TRACKED],
169 /// Control path trimming.
170 trimmed_def_paths: TrimmedDefPaths [TRACKED],
172 /// Specifications of codegen units / ThinLTO which are forced as a
173 /// result of parsing command line options. These are not necessarily
174 /// what rustc was invoked with, but massaged a bit to agree with
175 /// commands like `--emit llvm-ir` which they're often incompatible with
176 /// if we otherwise use the defaults of rustc.
177 cli_forced_codegen_units: Option<usize> [UNTRACKED],
178 cli_forced_thinlto_off: bool [UNTRACKED],
180 /// Remap source path prefixes in all output (messages, object files, debug, etc.).
181 remap_path_prefix: Vec<(PathBuf, PathBuf)> [TRACKED_NO_CRATE_HASH],
182 /// Base directory containing the `src/` for the Rust standard library, and
183 /// potentially `rustc` as well, if we can can find it. Right now it's always
184 /// `$sysroot/lib/rustlib/src/rust` (i.e. the `rustup` `rust-src` component).
186 /// This directory is what the virtual `/rustc/$hash` is translated back to,
187 /// if Rust was built with path remapping to `/rustc/$hash` enabled
188 /// (the `rust.remap-debuginfo` option in `config.toml`).
189 real_rust_source_base_dir: Option<PathBuf> [TRACKED_NO_CRATE_HASH],
191 edition: Edition [TRACKED],
193 /// `true` if we're emitting JSON blobs about each artifact produced
195 json_artifact_notifications: bool [TRACKED],
197 /// `true` if we're emitting a JSON blob containing the unused externs
198 json_unused_externs: bool [UNTRACKED],
200 pretty: Option<PpMode> [UNTRACKED],
204 /// Defines all `CodegenOptions`/`DebuggingOptions` fields and parsers all at once. The goal of this
205 /// macro is to define an interface that can be programmatically used by the option parser
206 /// to initialize the struct without hardcoding field names all over the place.
208 /// The goal is to invoke this macro once with the correct fields, and then this macro generates all
209 /// necessary code. The main gotcha of this macro is the `cgsetters` module which is a bunch of
210 /// generated code to parse an option into its respective field in the struct. There are a few
211 /// hand-written parsers for parsing specific types of values in this module.
212 macro_rules! options {
213 ($struct_name:ident, $setter_name:ident, $defaultfn:ident,
214 $buildfn:ident, $prefix:expr, $outputname:expr,
216 $($( #[$attr:meta] )* $opt:ident : $t:ty = (
219 [$dep_tracking_marker:ident],
224 pub struct $struct_name { $(pub $opt: $t),* }
226 pub fn $defaultfn() -> $struct_name {
227 $struct_name { $( $( #[$attr] )* $opt: $init),* }
230 pub fn $buildfn(matches: &getopts::Matches, error_format: ErrorOutputType) -> $struct_name
232 let mut op = $defaultfn();
233 for option in matches.opt_strs($prefix) {
234 let (key, value) = match option.split_once('=') {
235 None => (option, None),
236 Some((k, v)) => (k.to_string(), Some(v)),
238 let option_to_lookup = key.replace("-", "_");
239 let mut found = false;
240 for &(candidate, setter, type_desc, _) in $stat {
241 if option_to_lookup != candidate { continue }
242 if !setter(&mut op, value) {
245 early_error(error_format, &format!("{0} option `{1}` requires \
246 {2} ({3} {1}=<value>)",
251 early_error(error_format, &format!("incorrect value `{}` for {} \
252 option `{}` - {} was expected",
262 early_error(error_format, &format!("unknown {} option: `{}`",
270 fn dep_tracking_hash(&self, _for_crate_hash: bool, error_format: ErrorOutputType) -> u64 {
271 let mut sub_hashes = BTreeMap::new();
277 [$dep_tracking_marker]);
279 let mut hasher = DefaultHasher::new();
280 dep_tracking::stable_hash(sub_hashes,
287 pub type $setter_name = fn(&mut $struct_name, v: Option<&str>) -> bool;
288 pub const $stat: &[(&str, $setter_name, &str, &str)] =
289 &[ $( (stringify!($opt), $crate::options::parse::$opt, $crate::options::desc::$parse, $desc) ),* ];
291 // Sometimes different options need to build a common structure.
292 // That structure can kept in one of the options' fields, the others become dummy.
293 macro_rules! redirect_field {
294 ($cg:ident.link_arg) => { $cg.link_args };
295 ($cg:ident.pre_link_arg) => { $cg.pre_link_args };
296 ($cg:ident.$field:ident) => { $cg.$field };
300 pub fn $opt(cg: &mut $struct_name, v: Option<&str>) -> bool {
301 $crate::options::parse::$parse(&mut redirect_field!(cg.$opt), v)
307 #[allow(non_upper_case_globals)]
309 pub const parse_no_flag: &str = "no value";
310 pub const parse_bool: &str = "one of: `y`, `yes`, `on`, `n`, `no`, or `off`";
311 pub const parse_opt_bool: &str = parse_bool;
312 pub const parse_string: &str = "a string";
313 pub const parse_opt_string: &str = parse_string;
314 pub const parse_string_push: &str = parse_string;
315 pub const parse_opt_pathbuf: &str = "a path";
316 pub const parse_list: &str = "a space-separated list of strings";
317 pub const parse_opt_comma_list: &str = "a comma-separated list of strings";
318 pub const parse_number: &str = "a number";
319 pub const parse_opt_number: &str = parse_number;
320 pub const parse_threads: &str = parse_number;
321 pub const parse_passes: &str = "a space-separated list of passes, or `all`";
322 pub const parse_panic_strategy: &str = "either `unwind` or `abort`";
323 pub const parse_relro_level: &str = "one of: `full`, `partial`, or `off`";
324 pub const parse_sanitizers: &str =
325 "comma separated list of sanitizers: `address`, `hwaddress`, `leak`, `memory` or `thread`";
326 pub const parse_sanitizer_memory_track_origins: &str = "0, 1, or 2";
327 pub const parse_cfguard: &str =
328 "either a boolean (`yes`, `no`, `on`, `off`, etc), `checks`, or `nochecks`";
329 pub const parse_strip: &str = "either `none`, `debuginfo`, or `symbols`";
330 pub const parse_linker_flavor: &str = ::rustc_target::spec::LinkerFlavor::one_of();
331 pub const parse_optimization_fuel: &str = "crate=integer";
332 pub const parse_mir_spanview: &str = "`statement` (default), `terminator`, or `block`";
333 pub const parse_instrument_coverage: &str =
334 "`all` (default), `except-unused-generics`, `except-unused-functions`, or `off`";
335 pub const parse_unpretty: &str = "`string` or `string=string`";
336 pub const parse_treat_err_as_bug: &str = "either no value or a number bigger than 0";
337 pub const parse_lto: &str =
338 "either a boolean (`yes`, `no`, `on`, `off`, etc), `thin`, `fat`, or omitted";
339 pub const parse_linker_plugin_lto: &str =
340 "either a boolean (`yes`, `no`, `on`, `off`, etc), or the path to the linker plugin";
341 pub const parse_switch_with_opt_path: &str =
342 "an optional path to the profiling data output directory";
343 pub const parse_merge_functions: &str = "one of: `disabled`, `trampolines`, or `aliases`";
344 pub const parse_symbol_mangling_version: &str = "either `legacy` or `v0` (RFC 2603)";
345 pub const parse_src_file_hash: &str = "either `md5` or `sha1`";
346 pub const parse_relocation_model: &str =
347 "one of supported relocation models (`rustc --print relocation-models`)";
348 pub const parse_code_model: &str = "one of supported code models (`rustc --print code-models`)";
349 pub const parse_tls_model: &str = "one of supported TLS models (`rustc --print tls-models`)";
350 pub const parse_target_feature: &str = parse_string;
351 pub const parse_wasi_exec_model: &str = "either `command` or `reactor`";
352 pub const parse_split_debuginfo: &str =
353 "one of supported split-debuginfo modes (`off` or `dsymutil`)";
358 use std::str::FromStr;
360 /// This is for boolean options that don't take a value and start with
361 /// `no-`. This style of option is deprecated.
362 crate fn parse_no_flag(slot: &mut bool, v: Option<&str>) -> bool {
372 /// Use this for any boolean option that has a static default.
373 crate fn parse_bool(slot: &mut bool, v: Option<&str>) -> bool {
375 Some("y") | Some("yes") | Some("on") | None => {
379 Some("n") | Some("no") | Some("off") => {
387 /// Use this for any boolean option that lacks a static default. (The
388 /// actions taken when such an option is not specified will depend on
389 /// other factors, such as other options, or target options.)
390 crate fn parse_opt_bool(slot: &mut Option<bool>, v: Option<&str>) -> bool {
392 Some("y") | Some("yes") | Some("on") | None => {
396 Some("n") | Some("no") | Some("off") => {
404 /// Use this for any string option that has a static default.
405 crate fn parse_string(slot: &mut String, v: Option<&str>) -> bool {
408 *slot = s.to_string();
415 /// Use this for any string option that lacks a static default.
416 crate fn parse_opt_string(slot: &mut Option<String>, v: Option<&str>) -> bool {
419 *slot = Some(s.to_string());
426 crate fn parse_opt_pathbuf(slot: &mut Option<PathBuf>, v: Option<&str>) -> bool {
429 *slot = Some(PathBuf::from(s));
436 crate fn parse_string_push(slot: &mut Vec<String>, v: Option<&str>) -> bool {
439 slot.push(s.to_string());
446 crate fn parse_list(slot: &mut Vec<String>, v: Option<&str>) -> bool {
449 slot.extend(s.split_whitespace().map(|s| s.to_string()));
456 crate fn parse_opt_comma_list(slot: &mut Option<Vec<String>>, v: Option<&str>) -> bool {
459 let mut v: Vec<_> = s.split(',').map(|s| s.to_string()).collect();
468 crate fn parse_threads(slot: &mut usize, v: Option<&str>) -> bool {
469 match v.and_then(|s| s.parse().ok()) {
471 *slot = ::num_cpus::get();
482 /// Use this for any numeric option that has a static default.
483 crate fn parse_number<T: Copy + FromStr>(slot: &mut T, v: Option<&str>) -> bool {
484 match v.and_then(|s| s.parse().ok()) {
493 /// Use this for any numeric option that lacks a static default.
494 crate fn parse_opt_number<T: Copy + FromStr>(slot: &mut Option<T>, v: Option<&str>) -> bool {
497 *slot = s.parse().ok();
504 crate fn parse_passes(slot: &mut Passes, v: Option<&str>) -> bool {
511 let mut passes = vec![];
512 if parse_list(&mut passes, v) {
513 *slot = Passes::Some(passes);
522 crate fn parse_panic_strategy(slot: &mut Option<PanicStrategy>, v: Option<&str>) -> bool {
524 Some("unwind") => *slot = Some(PanicStrategy::Unwind),
525 Some("abort") => *slot = Some(PanicStrategy::Abort),
531 crate fn parse_relro_level(slot: &mut Option<RelroLevel>, v: Option<&str>) -> bool {
533 Some(s) => match s.parse::<RelroLevel>() {
534 Ok(level) => *slot = Some(level),
542 crate fn parse_sanitizers(slot: &mut SanitizerSet, v: Option<&str>) -> bool {
544 for s in v.split(',') {
546 "address" => SanitizerSet::ADDRESS,
547 "leak" => SanitizerSet::LEAK,
548 "memory" => SanitizerSet::MEMORY,
549 "thread" => SanitizerSet::THREAD,
550 "hwaddress" => SanitizerSet::HWADDRESS,
560 crate fn parse_sanitizer_memory_track_origins(slot: &mut usize, v: Option<&str>) -> bool {
562 Some("2") | None => {
578 crate fn parse_strip(slot: &mut Strip, v: Option<&str>) -> bool {
580 Some("none") => *slot = Strip::None,
581 Some("debuginfo") => *slot = Strip::Debuginfo,
582 Some("symbols") => *slot = Strip::Symbols,
588 crate fn parse_cfguard(slot: &mut CFGuard, v: Option<&str>) -> bool {
590 let mut bool_arg = None;
591 if parse_opt_bool(&mut bool_arg, v) {
592 *slot = if bool_arg.unwrap() { CFGuard::Checks } else { CFGuard::Disabled };
598 None => CFGuard::Checks,
599 Some("checks") => CFGuard::Checks,
600 Some("nochecks") => CFGuard::NoChecks,
601 Some(_) => return false,
606 crate fn parse_linker_flavor(slote: &mut Option<LinkerFlavor>, v: Option<&str>) -> bool {
607 match v.and_then(LinkerFlavor::from_str) {
608 Some(lf) => *slote = Some(lf),
614 crate fn parse_optimization_fuel(slot: &mut Option<(String, u64)>, v: Option<&str>) -> bool {
618 let parts = s.split('=').collect::<Vec<_>>();
619 if parts.len() != 2 {
622 let crate_name = parts[0].to_string();
623 let fuel = parts[1].parse::<u64>();
627 *slot = Some((crate_name, fuel.unwrap()));
633 crate fn parse_unpretty(slot: &mut Option<String>, v: Option<&str>) -> bool {
636 Some(s) if s.split('=').count() <= 2 => {
637 *slot = Some(s.to_string());
644 crate fn parse_mir_spanview(slot: &mut Option<MirSpanview>, v: Option<&str>) -> bool {
646 let mut bool_arg = None;
647 if parse_opt_bool(&mut bool_arg, v) {
648 *slot = if bool_arg.unwrap() { Some(MirSpanview::Statement) } else { None };
655 *slot = Some(MirSpanview::Statement);
661 *slot = Some(match v.trim_end_matches("s") {
662 "statement" | "stmt" => MirSpanview::Statement,
663 "terminator" | "term" => MirSpanview::Terminator,
664 "block" | "basicblock" => MirSpanview::Block,
670 crate fn parse_instrument_coverage(
671 slot: &mut Option<InstrumentCoverage>,
675 let mut bool_arg = None;
676 if parse_opt_bool(&mut bool_arg, v) {
677 *slot = if bool_arg.unwrap() { Some(InstrumentCoverage::All) } else { None };
684 *slot = Some(InstrumentCoverage::All);
690 *slot = Some(match v {
691 "all" => InstrumentCoverage::All,
692 "except-unused-generics" | "except_unused_generics" => {
693 InstrumentCoverage::ExceptUnusedGenerics
695 "except-unused-functions" | "except_unused_functions" => {
696 InstrumentCoverage::ExceptUnusedFunctions
698 "off" | "no" | "n" | "false" | "0" => InstrumentCoverage::Off,
704 crate fn parse_treat_err_as_bug(slot: &mut Option<NonZeroUsize>, v: Option<&str>) -> bool {
707 *slot = s.parse().ok();
711 *slot = NonZeroUsize::new(1);
717 crate fn parse_lto(slot: &mut LtoCli, v: Option<&str>) -> bool {
719 let mut bool_arg = None;
720 if parse_opt_bool(&mut bool_arg, v) {
721 *slot = if bool_arg.unwrap() { LtoCli::Yes } else { LtoCli::No };
727 None => LtoCli::NoParam,
728 Some("thin") => LtoCli::Thin,
729 Some("fat") => LtoCli::Fat,
730 Some(_) => return false,
735 crate fn parse_linker_plugin_lto(slot: &mut LinkerPluginLto, v: Option<&str>) -> bool {
737 let mut bool_arg = None;
738 if parse_opt_bool(&mut bool_arg, v) {
739 *slot = if bool_arg.unwrap() {
740 LinkerPluginLto::LinkerPluginAuto
742 LinkerPluginLto::Disabled
749 None => LinkerPluginLto::LinkerPluginAuto,
750 Some(path) => LinkerPluginLto::LinkerPlugin(PathBuf::from(path)),
755 crate fn parse_switch_with_opt_path(slot: &mut SwitchWithOptPath, v: Option<&str>) -> bool {
757 None => SwitchWithOptPath::Enabled(None),
758 Some(path) => SwitchWithOptPath::Enabled(Some(PathBuf::from(path))),
763 crate fn parse_merge_functions(slot: &mut Option<MergeFunctions>, v: Option<&str>) -> bool {
764 match v.and_then(|s| MergeFunctions::from_str(s).ok()) {
765 Some(mergefunc) => *slot = Some(mergefunc),
771 crate fn parse_relocation_model(slot: &mut Option<RelocModel>, v: Option<&str>) -> bool {
772 match v.and_then(|s| RelocModel::from_str(s).ok()) {
773 Some(relocation_model) => *slot = Some(relocation_model),
774 None if v == Some("default") => *slot = None,
780 crate fn parse_code_model(slot: &mut Option<CodeModel>, v: Option<&str>) -> bool {
781 match v.and_then(|s| CodeModel::from_str(s).ok()) {
782 Some(code_model) => *slot = Some(code_model),
788 crate fn parse_tls_model(slot: &mut Option<TlsModel>, v: Option<&str>) -> bool {
789 match v.and_then(|s| TlsModel::from_str(s).ok()) {
790 Some(tls_model) => *slot = Some(tls_model),
796 crate fn parse_symbol_mangling_version(
797 slot: &mut Option<SymbolManglingVersion>,
801 Some("legacy") => Some(SymbolManglingVersion::Legacy),
802 Some("v0") => Some(SymbolManglingVersion::V0),
808 crate fn parse_src_file_hash(
809 slot: &mut Option<SourceFileHashAlgorithm>,
812 match v.and_then(|s| SourceFileHashAlgorithm::from_str(s).ok()) {
813 Some(hash_kind) => *slot = Some(hash_kind),
819 crate fn parse_target_feature(slot: &mut String, v: Option<&str>) -> bool {
822 if !slot.is_empty() {
832 crate fn parse_wasi_exec_model(slot: &mut Option<WasiExecModel>, v: Option<&str>) -> bool {
834 Some("command") => *slot = Some(WasiExecModel::Command),
835 Some("reactor") => *slot = Some(WasiExecModel::Reactor),
841 crate fn parse_split_debuginfo(slot: &mut Option<SplitDebuginfo>, v: Option<&str>) -> bool {
842 match v.and_then(|s| SplitDebuginfo::from_str(s).ok()) {
843 Some(e) => *slot = Some(e),
850 options! {CodegenOptions, CodegenSetter, basic_codegen_options,
851 build_codegen_options, "C", "codegen",
854 // This list is in alphabetical order.
856 // If you add a new option, please update:
857 // - compiler/rustc_interface/src/tests.rs
858 // - src/doc/rustc/src/codegen-options/index.md
860 ar: String = (String::new(), parse_string, [UNTRACKED],
861 "this option is deprecated and does nothing"),
862 code_model: Option<CodeModel> = (None, parse_code_model, [TRACKED],
863 "choose the code model to use (`rustc --print code-models` for details)"),
864 codegen_units: Option<usize> = (None, parse_opt_number, [UNTRACKED],
865 "divide crate into N units to optimize in parallel"),
866 control_flow_guard: CFGuard = (CFGuard::Disabled, parse_cfguard, [TRACKED],
867 "use Windows Control Flow Guard (default: no)"),
868 debug_assertions: Option<bool> = (None, parse_opt_bool, [TRACKED],
869 "explicitly enable the `cfg(debug_assertions)` directive"),
870 debuginfo: usize = (0, parse_number, [TRACKED],
871 "debug info emission level (0 = no debug info, 1 = line tables only, \
872 2 = full debug info with variable and type information; default: 0)"),
873 default_linker_libraries: bool = (false, parse_bool, [UNTRACKED],
874 "allow the linker to link its default libraries (default: no)"),
875 embed_bitcode: bool = (true, parse_bool, [TRACKED],
876 "emit bitcode in rlibs (default: yes)"),
877 extra_filename: String = (String::new(), parse_string, [UNTRACKED],
878 "extra data to put in each output filename"),
879 force_frame_pointers: Option<bool> = (None, parse_opt_bool, [TRACKED],
880 "force use of the frame pointers"),
881 force_unwind_tables: Option<bool> = (None, parse_opt_bool, [TRACKED],
882 "force use of unwind tables"),
883 incremental: Option<String> = (None, parse_opt_string, [UNTRACKED],
884 "enable incremental compilation"),
885 inline_threshold: Option<u32> = (None, parse_opt_number, [TRACKED],
886 "set the threshold for inlining a function"),
887 link_arg: (/* redirected to link_args */) = ((), parse_string_push, [UNTRACKED],
888 "a single extra argument to append to the linker invocation (can be used several times)"),
889 link_args: Vec<String> = (Vec::new(), parse_list, [UNTRACKED],
890 "extra arguments to append to the linker invocation (space separated)"),
891 link_dead_code: Option<bool> = (None, parse_opt_bool, [TRACKED],
892 "keep dead code at link time (useful for code coverage) (default: no)"),
893 link_self_contained: Option<bool> = (None, parse_opt_bool, [UNTRACKED],
894 "control whether to link Rust provided C objects/libraries or rely
895 on C toolchain installed in the system"),
896 linker: Option<PathBuf> = (None, parse_opt_pathbuf, [UNTRACKED],
897 "system linker to link outputs with"),
898 linker_flavor: Option<LinkerFlavor> = (None, parse_linker_flavor, [UNTRACKED],
900 linker_plugin_lto: LinkerPluginLto = (LinkerPluginLto::Disabled,
901 parse_linker_plugin_lto, [TRACKED],
902 "generate build artifacts that are compatible with linker-based LTO"),
903 llvm_args: Vec<String> = (Vec::new(), parse_list, [TRACKED],
904 "a list of arguments to pass to LLVM (space separated)"),
905 lto: LtoCli = (LtoCli::Unspecified, parse_lto, [TRACKED],
906 "perform LLVM link-time optimizations"),
907 metadata: Vec<String> = (Vec::new(), parse_list, [TRACKED],
908 "metadata to mangle symbol names with"),
909 no_prepopulate_passes: bool = (false, parse_no_flag, [TRACKED],
910 "give an empty list of passes to the pass manager"),
911 no_redzone: Option<bool> = (None, parse_opt_bool, [TRACKED],
912 "disable the use of the redzone"),
913 no_stack_check: bool = (false, parse_no_flag, [UNTRACKED],
914 "this option is deprecated and does nothing"),
915 no_vectorize_loops: bool = (false, parse_no_flag, [TRACKED],
916 "disable loop vectorization optimization passes"),
917 no_vectorize_slp: bool = (false, parse_no_flag, [TRACKED],
918 "disable LLVM's SLP vectorization pass"),
919 opt_level: String = ("0".to_string(), parse_string, [TRACKED],
920 "optimization level (0-3, s, or z; default: 0)"),
921 overflow_checks: Option<bool> = (None, parse_opt_bool, [TRACKED],
922 "use overflow checks for integer arithmetic"),
923 panic: Option<PanicStrategy> = (None, parse_panic_strategy, [TRACKED],
924 "panic strategy to compile crate with"),
925 passes: Vec<String> = (Vec::new(), parse_list, [TRACKED],
926 "a list of extra LLVM passes to run (space separated)"),
927 prefer_dynamic: bool = (false, parse_bool, [TRACKED],
928 "prefer dynamic linking to static linking (default: no)"),
929 profile_generate: SwitchWithOptPath = (SwitchWithOptPath::Disabled,
930 parse_switch_with_opt_path, [TRACKED],
931 "compile the program with profiling instrumentation"),
932 profile_use: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
933 "use the given `.profdata` file for profile-guided optimization"),
934 relocation_model: Option<RelocModel> = (None, parse_relocation_model, [TRACKED],
935 "control generation of position-independent code (PIC) \
936 (`rustc --print relocation-models` for details)"),
937 remark: Passes = (Passes::Some(Vec::new()), parse_passes, [UNTRACKED],
938 "print remarks for these optimization passes (space separated, or \"all\")"),
939 rpath: bool = (false, parse_bool, [UNTRACKED],
940 "set rpath values in libs/exes (default: no)"),
941 save_temps: bool = (false, parse_bool, [UNTRACKED],
942 "save all temporary output files during compilation (default: no)"),
943 soft_float: bool = (false, parse_bool, [TRACKED],
944 "use soft float ABI (*eabihf targets only) (default: no)"),
945 split_debuginfo: Option<SplitDebuginfo> = (None, parse_split_debuginfo, [TRACKED],
946 "how to handle split-debuginfo, a platform-specific option"),
947 target_cpu: Option<String> = (None, parse_opt_string, [TRACKED],
948 "select target processor (`rustc --print target-cpus` for details)"),
949 target_feature: String = (String::new(), parse_target_feature, [TRACKED],
950 "target specific attributes. (`rustc --print target-features` for details). \
951 This feature is unsafe."),
953 // This list is in alphabetical order.
955 // If you add a new option, please update:
956 // - compiler/rustc_interface/src/tests.rs
957 // - src/doc/rustc/src/codegen-options/index.md
960 options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
961 build_debugging_options, "Z", "debugging",
964 // This list is in alphabetical order.
966 // If you add a new option, please update:
967 // - compiler/rustc_interface/src/tests.rs
969 allow_features: Option<Vec<String>> = (None, parse_opt_comma_list, [TRACKED],
970 "only allow the listed language features to be enabled in code (space separated)"),
971 always_encode_mir: bool = (false, parse_bool, [TRACKED],
972 "encode MIR of all functions into the crate metadata (default: no)"),
973 assume_incomplete_release: bool = (false, parse_bool, [TRACKED],
974 "make cfg(version) treat the current version as incomplete (default: no)"),
975 asm_comments: bool = (false, parse_bool, [TRACKED],
976 "generate comments into the assembly (may change behavior) (default: no)"),
977 ast_json: bool = (false, parse_bool, [UNTRACKED],
978 "print the AST as JSON and halt (default: no)"),
979 ast_json_noexpand: bool = (false, parse_bool, [UNTRACKED],
980 "print the pre-expansion AST as JSON and halt (default: no)"),
981 binary_dep_depinfo: bool = (false, parse_bool, [TRACKED],
982 "include artifacts (sysroot, crate dependencies) used during compilation in dep-info \
984 borrowck: String = ("migrate".to_string(), parse_string, [UNTRACKED],
985 "select which borrowck is used (`mir` or `migrate`) (default: `migrate`)"),
986 cgu_partitioning_strategy: Option<String> = (None, parse_opt_string, [TRACKED],
987 "the codegen unit partitioning strategy to use"),
988 chalk: bool = (false, parse_bool, [TRACKED],
989 "enable the experimental Chalk-based trait solving engine"),
990 codegen_backend: Option<String> = (None, parse_opt_string, [TRACKED],
991 "the backend to use"),
992 combine_cgu: bool = (false, parse_bool, [TRACKED],
993 "combine CGUs into a single one"),
994 crate_attr: Vec<String> = (Vec::new(), parse_string_push, [TRACKED],
995 "inject the given attribute in the crate"),
996 debug_macros: bool = (false, parse_bool, [TRACKED],
997 "emit line numbers debug info inside macros (default: no)"),
998 deduplicate_diagnostics: bool = (true, parse_bool, [UNTRACKED],
999 "deduplicate identical diagnostics (default: yes)"),
1000 dep_info_omit_d_target: bool = (false, parse_bool, [TRACKED],
1001 "in dep-info output, omit targets for tracking dependencies of the dep-info files \
1002 themselves (default: no)"),
1003 dep_tasks: bool = (false, parse_bool, [UNTRACKED],
1004 "print tasks that execute and the color their dep node gets (requires debug build) \
1006 dont_buffer_diagnostics: bool = (false, parse_bool, [UNTRACKED],
1007 "emit diagnostics rather than buffering (breaks NLL error downgrading, sorting) \
1009 dual_proc_macros: bool = (false, parse_bool, [TRACKED],
1010 "load proc macros for both target and host, but only link to the target (default: no)"),
1011 dump_dep_graph: bool = (false, parse_bool, [UNTRACKED],
1012 "dump the dependency graph to $RUST_DEP_GRAPH (default: /tmp/dep_graph.gv) \
1014 dump_mir: Option<String> = (None, parse_opt_string, [UNTRACKED],
1015 "dump MIR state to file.
1016 `val` is used to select which passes and functions to dump. For example:
1017 `all` matches all passes and functions,
1018 `foo` matches all passes for functions whose name contains 'foo',
1019 `foo & ConstProp` only the 'ConstProp' pass for function names containing 'foo',
1020 `foo | bar` all passes for function names containing 'foo' or 'bar'."),
1021 dump_mir_dataflow: bool = (false, parse_bool, [UNTRACKED],
1022 "in addition to `.mir` files, create graphviz `.dot` files with dataflow results \
1024 dump_mir_dir: String = ("mir_dump".to_string(), parse_string, [UNTRACKED],
1025 "the directory the MIR is dumped into (default: `mir_dump`)"),
1026 dump_mir_exclude_pass_number: bool = (false, parse_bool, [UNTRACKED],
1027 "exclude the pass number when dumping MIR (used in tests) (default: no)"),
1028 dump_mir_graphviz: bool = (false, parse_bool, [UNTRACKED],
1029 "in addition to `.mir` files, create graphviz `.dot` files (and with \
1030 `-Z instrument-coverage`, also create a `.dot` file for the MIR-derived \
1031 coverage graph) (default: no)"),
1032 dump_mir_spanview: Option<MirSpanview> = (None, parse_mir_spanview, [UNTRACKED],
1033 "in addition to `.mir` files, create `.html` files to view spans for \
1034 all `statement`s (including terminators), only `terminator` spans, or \
1035 computed `block` spans (one span encompassing a block's terminator and \
1036 all statements). If `-Z instrument-coverage` is also enabled, create \
1037 an additional `.html` file showing the computed coverage spans."),
1038 emit_future_incompat_report: bool = (false, parse_bool, [UNTRACKED],
1039 "emits a future-incompatibility report for lints (RFC 2834)"),
1040 emit_stack_sizes: bool = (false, parse_bool, [UNTRACKED],
1041 "emit a section containing stack size metadata (default: no)"),
1042 fewer_names: Option<bool> = (None, parse_opt_bool, [TRACKED],
1043 "reduce memory use by retaining fewer names within compilation artifacts (LLVM-IR) \
1045 force_overflow_checks: Option<bool> = (None, parse_opt_bool, [TRACKED],
1046 "force overflow checks on or off"),
1047 force_unstable_if_unmarked: bool = (false, parse_bool, [TRACKED],
1048 "force all crates to be `rustc_private` unstable (default: no)"),
1049 fuel: Option<(String, u64)> = (None, parse_optimization_fuel, [TRACKED],
1050 "set the optimization fuel quota for a crate"),
1051 function_sections: Option<bool> = (None, parse_opt_bool, [TRACKED],
1052 "whether each function should go in its own section"),
1053 graphviz_dark_mode: bool = (false, parse_bool, [UNTRACKED],
1054 "use dark-themed colors in graphviz output (default: no)"),
1055 graphviz_font: String = ("Courier, monospace".to_string(), parse_string, [UNTRACKED],
1056 "use the given `fontname` in graphviz output; can be overridden by setting \
1057 environment variable `RUSTC_GRAPHVIZ_FONT` (default: `Courier, monospace`)"),
1058 hir_stats: bool = (false, parse_bool, [UNTRACKED],
1059 "print some statistics about AST and HIR (default: no)"),
1060 human_readable_cgu_names: bool = (false, parse_bool, [TRACKED],
1061 "generate human-readable, predictable names for codegen units (default: no)"),
1062 identify_regions: bool = (false, parse_bool, [UNTRACKED],
1063 "display unnamed regions as `'<id>`, using a non-ident unique id (default: no)"),
1064 incremental_ignore_spans: bool = (false, parse_bool, [UNTRACKED],
1065 "ignore spans during ICH computation -- used for testing (default: no)"),
1066 incremental_info: bool = (false, parse_bool, [UNTRACKED],
1067 "print high-level information about incremental reuse (or the lack thereof) \
1069 incremental_verify_ich: bool = (false, parse_bool, [UNTRACKED],
1070 "verify incr. comp. hashes of green query instances (default: no)"),
1071 inline_mir: Option<bool> = (None, parse_opt_bool, [TRACKED],
1072 "enable MIR inlining (default: no)"),
1073 inline_mir_threshold: Option<usize> = (None, parse_opt_number, [TRACKED],
1074 "a default MIR inlining threshold (default: 50)"),
1075 inline_mir_hint_threshold: Option<usize> = (None, parse_opt_number, [TRACKED],
1076 "inlining threshold for functions with inline hint (default: 100)"),
1077 inline_in_all_cgus: Option<bool> = (None, parse_opt_bool, [TRACKED],
1078 "control whether `#[inline]` functions are in all CGUs"),
1079 input_stats: bool = (false, parse_bool, [UNTRACKED],
1080 "gather statistics about the input (default: no)"),
1081 instrument_coverage: Option<InstrumentCoverage> = (None, parse_instrument_coverage, [TRACKED],
1082 "instrument the generated code to support LLVM source-based code coverage \
1083 reports (note, the compiler build config must include `profiler = true`); \
1084 implies `-Z symbol-mangling-version=v0`. Optional values are:
1085 `=all` (implicit value)
1086 `=except-unused-generics`
1087 `=except-unused-functions`
1089 instrument_mcount: bool = (false, parse_bool, [TRACKED],
1090 "insert function instrument code for mcount-based tracing (default: no)"),
1091 keep_hygiene_data: bool = (false, parse_bool, [UNTRACKED],
1092 "keep hygiene data after analysis (default: no)"),
1093 link_native_libraries: bool = (true, parse_bool, [UNTRACKED],
1094 "link native libraries in the linker invocation (default: yes)"),
1095 link_only: bool = (false, parse_bool, [TRACKED],
1096 "link the `.rlink` file generated by `-Z no-link` (default: no)"),
1097 llvm_time_trace: bool = (false, parse_bool, [UNTRACKED],
1098 "generate JSON tracing data file from LLVM data (default: no)"),
1099 ls: bool = (false, parse_bool, [UNTRACKED],
1100 "list the symbols defined by a library crate (default: no)"),
1101 macro_backtrace: bool = (false, parse_bool, [UNTRACKED],
1102 "show macro backtraces (default: no)"),
1103 merge_functions: Option<MergeFunctions> = (None, parse_merge_functions, [TRACKED],
1104 "control the operation of the MergeFunctions LLVM pass, taking \
1105 the same values as the target option of the same name"),
1106 meta_stats: bool = (false, parse_bool, [UNTRACKED],
1107 "gather metadata statistics (default: no)"),
1108 mir_emit_retag: bool = (false, parse_bool, [TRACKED],
1109 "emit Retagging MIR statements, interpreted e.g., by miri; implies -Zmir-opt-level=0 \
1111 mir_opt_level: Option<usize> = (None, parse_opt_number, [TRACKED],
1112 "MIR optimization level (0-4; default: 1 in non optimized builds and 2 in optimized builds)"),
1113 mutable_noalias: Option<bool> = (None, parse_opt_bool, [TRACKED],
1114 "emit noalias metadata for mutable references (default: yes for LLVM >= 12, otherwise no)"),
1115 new_llvm_pass_manager: bool = (false, parse_bool, [TRACKED],
1116 "use new LLVM pass manager (default: no)"),
1117 nll_facts: bool = (false, parse_bool, [UNTRACKED],
1118 "dump facts from NLL analysis into side files (default: no)"),
1119 nll_facts_dir: String = ("nll-facts".to_string(), parse_string, [UNTRACKED],
1120 "the directory the NLL facts are dumped into (default: `nll-facts`)"),
1121 no_analysis: bool = (false, parse_no_flag, [UNTRACKED],
1122 "parse and expand the source, but run no analysis"),
1123 no_codegen: bool = (false, parse_no_flag, [TRACKED],
1124 "run all passes except codegen; no output"),
1125 no_generate_arange_section: bool = (false, parse_no_flag, [TRACKED],
1126 "omit DWARF address ranges that give faster lookups"),
1127 no_interleave_lints: bool = (false, parse_no_flag, [UNTRACKED],
1128 "execute lints separately; allows benchmarking individual lints"),
1129 no_leak_check: bool = (false, parse_no_flag, [UNTRACKED],
1130 "disable the 'leak check' for subtyping; unsound, but useful for tests"),
1131 no_link: bool = (false, parse_no_flag, [TRACKED],
1132 "compile without linking"),
1133 no_parallel_llvm: bool = (false, parse_no_flag, [UNTRACKED],
1134 "run LLVM in non-parallel mode (while keeping codegen-units and ThinLTO)"),
1135 no_profiler_runtime: bool = (false, parse_no_flag, [TRACKED],
1136 "prevent automatic injection of the profiler_builtins crate"),
1137 normalize_docs: bool = (false, parse_bool, [TRACKED],
1138 "normalize associated items in rustdoc when generating documentation"),
1139 osx_rpath_install_name: bool = (false, parse_bool, [TRACKED],
1140 "pass `-install_name @rpath/...` to the macOS linker (default: no)"),
1141 panic_abort_tests: bool = (false, parse_bool, [TRACKED],
1142 "support compiling tests with panic=abort (default: no)"),
1143 parse_only: bool = (false, parse_bool, [UNTRACKED],
1144 "parse only; do not compile, assemble, or link (default: no)"),
1145 perf_stats: bool = (false, parse_bool, [UNTRACKED],
1146 "print some performance-related statistics (default: no)"),
1147 plt: Option<bool> = (None, parse_opt_bool, [TRACKED],
1148 "whether to use the PLT when calling into shared libraries;
1149 only has effect for PIC code on systems with ELF binaries
1150 (default: PLT is disabled if full relro is enabled)"),
1151 polonius: bool = (false, parse_bool, [TRACKED],
1152 "enable polonius-based borrow-checker (default: no)"),
1153 polymorphize: bool = (false, parse_bool, [TRACKED],
1154 "perform polymorphization analysis"),
1155 pre_link_arg: (/* redirected to pre_link_args */) = ((), parse_string_push, [UNTRACKED],
1156 "a single extra argument to prepend the linker invocation (can be used several times)"),
1157 pre_link_args: Vec<String> = (Vec::new(), parse_list, [UNTRACKED],
1158 "extra arguments to prepend to the linker invocation (space separated)"),
1159 precise_enum_drop_elaboration: bool = (true, parse_bool, [TRACKED],
1160 "use a more precise version of drop elaboration for matches on enums (default: yes). \
1161 This results in better codegen, but has caused miscompilations on some tier 2 platforms. \
1162 See #77382 and #74551."),
1163 print_fuel: Option<String> = (None, parse_opt_string, [TRACKED],
1164 "make rustc print the total optimization fuel used by a crate"),
1165 print_link_args: bool = (false, parse_bool, [UNTRACKED],
1166 "print the arguments passed to the linker (default: no)"),
1167 print_llvm_passes: bool = (false, parse_bool, [UNTRACKED],
1168 "print the LLVM optimization passes being run (default: no)"),
1169 print_mono_items: Option<String> = (None, parse_opt_string, [UNTRACKED],
1170 "print the result of the monomorphization collection pass"),
1171 print_type_sizes: bool = (false, parse_bool, [UNTRACKED],
1172 "print layout information for each type encountered (default: no)"),
1173 proc_macro_backtrace: bool = (false, parse_bool, [UNTRACKED],
1174 "show backtraces for panics during proc-macro execution (default: no)"),
1175 profile: bool = (false, parse_bool, [TRACKED],
1176 "insert profiling code (default: no)"),
1177 profile_emit: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
1178 "file path to emit profiling data at runtime when using 'profile' \
1179 (default based on relative source path)"),
1180 query_dep_graph: bool = (false, parse_bool, [UNTRACKED],
1181 "enable queries of the dependency graph for regression testing (default: no)"),
1182 query_stats: bool = (false, parse_bool, [UNTRACKED],
1183 "print some statistics about the query system (default: no)"),
1184 relax_elf_relocations: Option<bool> = (None, parse_opt_bool, [TRACKED],
1185 "whether ELF relocations can be relaxed"),
1186 relro_level: Option<RelroLevel> = (None, parse_relro_level, [TRACKED],
1187 "choose which RELRO level to use"),
1188 report_delayed_bugs: bool = (false, parse_bool, [TRACKED],
1189 "immediately print bugs registered with `delay_span_bug` (default: no)"),
1190 sanitizer: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED],
1192 sanitizer_memory_track_origins: usize = (0, parse_sanitizer_memory_track_origins, [TRACKED],
1193 "enable origins tracking in MemorySanitizer"),
1194 sanitizer_recover: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED],
1195 "enable recovery for selected sanitizers"),
1196 saturating_float_casts: Option<bool> = (None, parse_opt_bool, [TRACKED],
1197 "make float->int casts UB-free: numbers outside the integer type's range are clipped to \
1198 the max/min integer respectively, and NaN is mapped to 0 (default: yes)"),
1199 save_analysis: bool = (false, parse_bool, [UNTRACKED],
1200 "write syntax and type analysis (in JSON format) information, in \
1201 addition to normal output (default: no)"),
1202 self_profile: SwitchWithOptPath = (SwitchWithOptPath::Disabled,
1203 parse_switch_with_opt_path, [UNTRACKED],
1204 "run the self profiler and output the raw event data"),
1205 /// keep this in sync with the event filter names in librustc_data_structures/profiling.rs
1206 self_profile_events: Option<Vec<String>> = (None, parse_opt_comma_list, [UNTRACKED],
1207 "specify the events recorded by the self profiler;
1208 for example: `-Z self-profile-events=default,query-keys`
1209 all options: none, all, default, generic-activity, query-provider, query-cache-hit
1210 query-blocked, incr-cache-load, query-keys, function-args, args, llvm"),
1211 share_generics: Option<bool> = (None, parse_opt_bool, [TRACKED],
1212 "make the current crate share its generic instantiations"),
1213 show_span: Option<String> = (None, parse_opt_string, [TRACKED],
1214 "show spans for compiler debugging (expr|pat|ty)"),
1215 span_debug: bool = (false, parse_bool, [UNTRACKED],
1216 "forward proc_macro::Span's `Debug` impl to `Span`"),
1217 /// o/w tests have closure@path
1218 span_free_formats: bool = (false, parse_bool, [UNTRACKED],
1219 "exclude spans when debug-printing compiler state (default: no)"),
1220 src_hash_algorithm: Option<SourceFileHashAlgorithm> = (None, parse_src_file_hash, [TRACKED],
1221 "hash algorithm of source files in debug info (`md5`, `sha1`, or `sha256`)"),
1222 strip: Strip = (Strip::None, parse_strip, [UNTRACKED],
1223 "tell the linker which information to strip (`none` (default), `debuginfo` or `symbols`)"),
1224 split_dwarf_inlining: bool = (true, parse_bool, [UNTRACKED],
1225 "provide minimal debug info in the object/executable to facilitate online \
1226 symbolication/stack traces in the absence of .dwo/.dwp files when using Split DWARF"),
1227 symbol_mangling_version: Option<SymbolManglingVersion> = (None,
1228 parse_symbol_mangling_version, [TRACKED],
1229 "which mangling version to use for symbol names ('legacy' (default) or 'v0')"),
1230 teach: bool = (false, parse_bool, [TRACKED],
1231 "show extended diagnostic help (default: no)"),
1232 terminal_width: Option<usize> = (None, parse_opt_number, [UNTRACKED],
1233 "set the current terminal width"),
1234 tune_cpu: Option<String> = (None, parse_opt_string, [TRACKED],
1235 "select processor to schedule for (`rustc --print target-cpus` for details)"),
1236 thinlto: Option<bool> = (None, parse_opt_bool, [TRACKED],
1237 "enable ThinLTO when possible"),
1238 /// We default to 1 here since we want to behave like
1239 /// a sequential compiler for now. This'll likely be adjusted
1240 /// in the future. Note that -Zthreads=0 is the way to get
1241 /// the num_cpus behavior.
1242 threads: usize = (1, parse_threads, [UNTRACKED],
1243 "use a thread pool with N threads"),
1244 time: bool = (false, parse_bool, [UNTRACKED],
1245 "measure time of rustc processes (default: no)"),
1246 time_llvm_passes: bool = (false, parse_bool, [UNTRACKED],
1247 "measure time of each LLVM pass (default: no)"),
1248 time_passes: bool = (false, parse_bool, [UNTRACKED],
1249 "measure time of each rustc pass (default: no)"),
1250 tls_model: Option<TlsModel> = (None, parse_tls_model, [TRACKED],
1251 "choose the TLS model to use (`rustc --print tls-models` for details)"),
1252 trace_macros: bool = (false, parse_bool, [UNTRACKED],
1253 "for every macro invocation, print its name and arguments (default: no)"),
1254 trap_unreachable: Option<bool> = (None, parse_opt_bool, [TRACKED],
1255 "generate trap instructions for unreachable intrinsics (default: use target setting, usually yes)"),
1256 treat_err_as_bug: Option<NonZeroUsize> = (None, parse_treat_err_as_bug, [TRACKED],
1257 "treat error number `val` that occurs as bug"),
1258 trim_diagnostic_paths: bool = (true, parse_bool, [UNTRACKED],
1259 "in diagnostics, use heuristics to shorten paths referring to items"),
1260 ui_testing: bool = (false, parse_bool, [UNTRACKED],
1261 "emit compiler diagnostics in a form suitable for UI testing (default: no)"),
1262 unleash_the_miri_inside_of_you: bool = (false, parse_bool, [TRACKED],
1263 "take the brakes off const evaluation. NOTE: this is unsound (default: no)"),
1264 unpretty: Option<String> = (None, parse_unpretty, [UNTRACKED],
1265 "present the input source, unstable (and less-pretty) variants;
1266 valid types are any of the types for `--pretty`, as well as:
1267 `expanded`, `expanded,identified`,
1268 `expanded,hygiene` (with internal representations),
1269 `everybody_loops` (all function bodies replaced with `loop {}`),
1270 `ast-tree` (raw AST before expansion),
1271 `ast-tree,expanded` (raw AST after expansion),
1272 `hir` (the HIR), `hir,identified`,
1273 `hir,typed` (HIR with types for each node),
1274 `hir-tree` (dump the raw HIR),
1275 `mir` (the MIR), or `mir-cfg` (graphviz formatted MIR)"),
1276 unsound_mir_opts: bool = (false, parse_bool, [TRACKED],
1277 "enable unsound and buggy MIR optimizations (default: no)"),
1278 unstable_options: bool = (false, parse_bool, [UNTRACKED],
1279 "adds unstable command line options to rustc interface (default: no)"),
1280 use_ctors_section: Option<bool> = (None, parse_opt_bool, [TRACKED],
1281 "use legacy .ctors section for initializers rather than .init_array"),
1282 validate_mir: bool = (false, parse_bool, [UNTRACKED],
1283 "validate MIR after each transformation"),
1284 verbose: bool = (false, parse_bool, [UNTRACKED],
1285 "in general, enable more debug printouts (default: no)"),
1286 verify_llvm_ir: bool = (false, parse_bool, [TRACKED],
1287 "verify LLVM IR (default: no)"),
1288 wasi_exec_model: Option<WasiExecModel> = (None, parse_wasi_exec_model, [TRACKED],
1289 "whether to build a wasi command or reactor"),
1291 // This list is in alphabetical order.
1293 // If you add a new option, please update:
1294 // - compiler/rustc_interface/src/tests.rs
1297 #[derive(Clone, Hash, PartialEq, Eq, Debug)]
1298 pub enum WasiExecModel {