383 lines
80 KiB
Plaintext
383 lines
80 KiB
Plaintext
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rust
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ß= #rustc 1.96.0 (ac68faa20 2026-05-25)ÁÀ뉊 ]!ÜÛê(¹Þ—šên -5be7b69c3ff7b5b8Á íàÄTËŸ ÜJîÄ)'ß\¥! -3d1337db07d0b3aeÁ ¤²XctÔ'ÐÓ©z¨É½Ó -a4945860e1c53b00Á ¤°ð ¾ä-±($²ï=©Ã -7e98a21bfd32b0edÁ–�òÖÀH•‘P IÓHã#£ -055f30b747f859b6Á rustc_std_workspace_coreÁCçß^ò½èÝ$Çÿ+Cé -c4878ee60b2242c9Á ŸÃï+Ñ]ŠqB<ÏïW# -8dd1dd90e70d0b6aÁ miniz_oxideÁ€š»J(P>àö÷g\K -1eb618da2918ab7fÁ adler2ÁÆ;+Þ®5¥ÌýÝ°¦ÛLˆ -f7919172d268e069Á hashbrownÁPäV9ÒÆèÜ�"ÊÖVŽ\ -0fc2184a5da6723aÁ rustc_std_workspace_allocÁs&ØòØy¯s•bæ!‰ýŠ -97e4bf30be240674Á
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std_detectÁhŠBîÙºÌI®Ë�Å�š -9dbbf8346ba7ac8bÁ rustc_demangleÁûë9´Ç×@Œ�’ùXFº -f33013f239bf9f14Á cfg_ifÁÜLh�ž§Œaã¯>� -0a71c8f33a838301Á addr2lineÁ׎Þ!]8V$É@@T· -e618e6be60e87ba2Á gimliÁ¸
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‹ás «LÖ€îâƒ×ɯŒ -ee6f3747e38367f0Á testsÁ,Ô ‚ $É À 6
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errorÁ descriptionÁ Ü × from_exitÁ from_ioÁ from_numÁ from_utf8Á þ ´ % %%%%%% ,æ - , commandÁ ,Ä 0 try_versionÁ % get_rustc_wrapperÁ Ä 4 44444 :æ : from_commandÁ < emitÁ
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emit_type_cfgÁ D probe_expressionÁ D emit_expression_cfgÁ D probe_constantÁ D emit_constant_cfgÁ mangleÁ d dir_contains_targetÁ f g h h rustflagsÁ k new_uuidÁ m FNV_OFFSET_BASISÁ m FNV_PRIMEÁ ErrorÁ p‚ r× ErrorKindÁ t IoÁ u
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StdioÁ,è ¶2 ATOMIC_USIZE_INITÁŒ› Üà AtomicUsizeÁ\Æ „Ä ®DÓ ¼À é,ù p $�,— † 3ï<¹ Ž >ü ž¯ ü M J A Rust library for build scripts to automatically configure code based onÁ üNQ N compiler support. Code snippets are dynamically tested to see if the `rustc`Á ü G D will accept them, rather than hard-coding specific version support.Á è ú ì ú dð ## UsageÁ ý ú ü�" Add this to your `Cargo.toml`:Á ¤ ú \¨ ```tomlÁ Ä´ [build-dependencies]Á ŒÍ autocfg = "1"Á <ß ```Á ç ú üëK H Then use it in your `build.rs` script to detect compiler features. ForÁ ü·E B example, to test for 128-bit integer support, it might look like:Á ý ú \� ```rustÁ Ì� extern crate autocfg;Á § ú |« fn main() {Á ü»@ = # // Normally, cargo will set `OUT_DIR` for build scripts.Á üü3 0 # let exe = std::env::current_exe().unwrap();Á ü°< 9 # std::env::set_var("OUT_DIR", exe.parent().unwrap());Á üí let ac = autocfg::new();Á üŽ! ac.emit_has_type("i128");Á ° ú ü´C @ // (optional) We don't need to rerun for anything external.Á üø( % autocfg::rerun_path("build.rs");Á ,¡ }Á <§ ¨‡ ¯ ú ü³P M If the type test succeeds, this will write a `cargo:rustc-cfg=has_i128` lineÁ ü„P M for Cargo, which translates to Rust arguments `--cfg has_i128`. Then in theÁ üÕR O rest of your Rust code, you can add `#[cfg(has_i128)]` conditions on code thatÁ ü¨ 6 3 should only be used when the compiler supports it.Á ß ú tã ## CautionÁ ò ú üö R O Many of the probing methods of `AutoCfg` document the particular template theyÁ üÉ
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R O use, **subject to change**. The inputs are not validated to make sure they areÁ üœ Q N semantically correct for their expected use, so it's _possible_ to escape andÁ üî P M inject something unintended. However, such abuse is unsupported and will notÁ ü¿ 7 4 be considered when making changes to the templates.Á %4?@ABCdfkm¢Àw €x ‰ €Š ¡ òIx … ¨�o äÈ Å�m õ Ú�g § ó�b Ÿ!
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< ñ <±4Ð < ñ¢ = ‰£ = ¦£ = = < = Ý É „° δû ü’3 0 Writes a config flag for rustc on standard out.Á Æ ú üÊ* ' This looks like: `cargo:rustc-cfg=CFG`Á õ ú üù@ = Cargo will use this in arguments to rustc, like `--cfg CFG`.Á º ú ü¾9 6 This does not automatically call [`emit_possibility`]Á üøP M so the compiler my generate an [`unexpected_cfgs` warning][check-cfg-flags].Á üÉa ^ However, all the builtin emit methods on [`AutoCfg`] call [`emit_possibility`] automatically.Á « ú ü¯K H [check-cfg-flags]: https://blog.rust-lang.org/2024/05/06/check-cfg.htmlÁ$‚ · · É Œ
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? â ‡ ìÏ üÀL I Writes a line telling Cargo to rerun the build script if `path` changes.Á � ú ü‘2 / This looks like: `cargo:rerun-if-changed=PATH`Á Ä ú üÈN K This requires at least cargo 0.7.0, corresponding to rustc 1.6.0. EarlierÁ ü— 7 4 versions of cargo will simply ignore the directive.ÁTÖ ¸ ¸ É ç
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$á ÜÓ ü£ L I Writes a line telling Cargo to rerun the build script if the environmentÁ Üð variable `var` changes.Á Œ ú ü� 5 2 This looks like: `cargo:rerun-if-env-changed=VAR`Á Æ ú üÊ P M This requires at least cargo 0.21.0, corresponding to rustc 1.20.0. EarlierÁ ü› 7 ¼²LÚ ¹ ¹ É é
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A ½ ä üÕ&" ü¨ m j Indicates to rustc that a config flag should not generate an [`unexpected_cfgs` warning][check-cfg-flags]Á –! ú üš!4 1 This looks like `cargo:rustc-check-cfg=cfg(VAR)`Á Ï! ú üÓ!e b As of rust 1.80, the compiler does [automatic checking of cfgs at compile time][check-cfg-flags].Á ü¹"[ X All custom configuration flags must be known to rustc, or they will generate a warning.Á ü•#T Q This is done automatically when calling the builtin emit methods on [`AutoCfg`],Á üê#A > but not when calling [`autocfg::emit`](crate::emit) directly.Á ¬$ ú ü°$@ = Versions before rust 1.80 will simply ignore this directive.Á ñ$ ú üõ$S P This function indicates to the compiler that the config flag never has a value.Á üÉ%; 8 If this is not desired, see [the blog post][check-cfg].Á …& ú ü‰&K š¯„Ü& º º É ò&
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B â í& ¼�( ü±'% " Creates a new `AutoCfg` instance.Á ×' ú dÛ' # PanicsÁ è' ú üì'0 - Panics if `AutoCfg::new()` returns an error.Á ¤( ±
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C dÖ( ± EFHIJKLMNPRTUVWXYZ[\]^_`abc ü•+# üé(% €¾ “) ú œ›) # Common errorsÁ ³) ú ü»)? < - `rustc` can't be executed, from `RUSTC` or in the `PATH`.Á üÿ)6 3 - The version output from `rustc` can't be parsed.Á üº*N K - `OUT_DIR` is not set in the environment, or is not a writable directory.Á �+ ú œ+ „r D D
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E üŽ/@ üä,I F Creates a new `AutoCfg` instance with the specified output directory.Á ²- ú œº- ¦À Ò- ú üÚ-? ÏÀ üž.6 ˜Á üÙ.( % - `dir` is not a writable directory.Á †/ úD•/ š`„r D ¥ G G D Íìš` ž/ æ š`—- l¡/
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Fš`ìy¾)$& äú? ü×8B ? Returns whether `AutoCfg` is using `#![no_std]` in its probes.Á ž9 ú ü¦9K H This is automatically detected during construction -- if an empty probeÁ üö9J G fails while one with `#![no_std]` succeeds, then the attribute will beÁ üÅ:H E used for all further probes. This is usually only necessary when theÁ ü’;I F `TARGET` lacks `std` altogether. If neither succeeds, `no_std` is notÁ üà;G D set, but that `AutoCfg` will probably only work for version checks.Á ¬< ú ü´<G D This attribute changes the implicit [prelude] from `std` to `core`,Á ü€=G D which may affect the paths you need to use in other probes. It alsoÁ üÌ=H E restricts some types that otherwise get additional methods in `std`,Á ü™>7 4 like floating-point trigonometry and slice sorting.Á Õ> ú üÝ>0 - See also [`set_no_std`](#method.set_no_std).Á ’? ú üš?[ X [prelude]: https://doc.rust-lang.org/reference/names/preludes.html#the-no_std-attributeÁ4�@ » »± D ˆ@ D
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H $‰@ ü³A* ü¸@A > Sets whether `AutoCfg` should use `#![no_std]` in its probes.Á þ@ ú ü†A( % See also [`no_std`](#method.no_std).ÁTºA ¼ ¼± É D ÅA D
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4ÐA ü«C% ü‰BU R Returns the `--edition` string that is currently being passed to `rustc`, if any,Á üãBC @ as configured by the [`set_edition`][Self::set_edition] method.Á<²C ½ ½± ۼݼ޼© ß¼ à¼ÛἈ cSñŸ«‡zÙ ½ D ºC D
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J $»C üŠK6 üÒD? < Sets the `--edition` string that will be passed to `rustc`,Á ü–E; 8 or `None` to leave the compiler at its default edition.Á ÖE ú üÞEP M See also [The Rust Edition Guide](https://doc.rust-lang.org/edition-guide/).Á ³F ú ü»F^ [ **Warning:** Setting an unsupported edition will likely cause **all** subsequent probes toÁ üžGU R fail! As of this writing, the known editions and their minimum Rust versions are:Á øG ú ä€H | Edition | Version |Á ä¡H | ------- | ---------- |Á äÂH | 2015 | 1.27.0[^1] |Á äãH | 2018 | 1.31.0 |Á ä„I | 2021 | 1.56.0 |Á ä¥I | 2024 | 1.85.0 |Á ÆI ú üÎI_ \ [^1]: Prior to 1.27.0, Rust was effectively 2015 Edition by default, but the concept hadn'tÁ ü²JS P been established yet, so the explicit `--edition` flag wasn't supported either.Á\‘K ¾ ¾± óKÉ D �K D
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K $¢K ø <¨K üÞLE üîKD A Tests whether the current `rustc` reports a version greater thanÁ ü·L" or equal to "`major`.`minor`".ÁœåL ¿ ¿± €5€5 D ùL D
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L $úL þ,€M ‹,ŽM üõN< üíMJ G Sets a `cfg` value of the form `rustc_major_minor`, like `rustc_1_29`,Á ü¼N4 1 if the current `rustc` is at least that version.Á”üN À À± €5€5É D �O D
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R $ë_ codeÁ$ñ_ !üÎq8 üÖaC @ Tests whether the given code can be compiled as a Rust library.Á žb ú ü¦bK H This will only return `Ok` if the compiler ran and exited successfully,Á üöb per `ExitStatus::success()`.Á ü›cF C The code is passed to the compiler exactly as-is, notably not evenÁ üæcH E adding the [`#![no_std]`][Self::no_std] attribute like other probes.Á ³d ú ü»dJ G Raw probes are useful for testing functionality that's not yet coveredÁ üŠeJ G by the rest of the `AutoCfg` API. For example, the following attributeÁ üÙeL I **must** be used at the crate level, so it wouldn't work within the codeÁ üªf. + templates used by other `probe_*` methods.Á Ýf ú <åf ¨‡ Üñf # extern crate autocfg;Á ü‘g> ; # // Normally, cargo will set `OUT_DIR` for build scripts.Á üÔg1 . # let exe = std::env::current_exe().unwrap();Á üŠh: 7 # std::env::set_var("OUT_DIR", exe.parent().unwrap());Á äÉh let ac = autocfg::new();Á üêh5 2 assert!(ac.probe_raw("#![no_builtins]").is_ok());Á <¤i ¨‡ °i ú ü¸iH E Rust nightly features could be tested as well -- ideally including aÁ ü…jG D code sample to ensure the unstable feature still works as expected.Á üÑjH E For example, `slice::group_by` was renamed to `chunk_by` when it wasÁ üžkJ G stabilized, even though the feature name was unchanged, so testing theÁ üíkF C `#![feature(..)]` alone wouldn't reveal that. For larger snippets,Á ü¸lD A [`include_str!`] may be useful to load them from separate files.Á �m ú <‰m ¨‡ Ü•m ·ç üµm> Üç üøm1 ¤è ü®n: ßè äín ¢é ”Žo let code = r#"Á ü¥o# #![feature(slice_group_by)]Á üÍoE B pub fn probe(slice: &[i
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```ignoreÁ üès extern crate CRATE as probe;Á <�t ¨‡œ t Æ Ç Æ± Ç D ´t D
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U $µt Ð $»t üªv, üÚuK H Emits a config value `has_CRATE` if `probe_sysroot_crate` returns true.Á”±v È É È± É É D Äv D
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V $Åv Ð $Ëv üÐy, ü”x- * Tests whether the given path can be used.Á Æx ú üÎxA €ó ”y ú lœy Öó Œ®y pub use PATH;Á <Äy ¨‡T×y Ê Ë Ê± Ë D ây D
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$éy üƒ|' üÀzA > Emits a config value `has_PATH` if `probe_path` returns true.Á †{ ú üŽ{E B Any non-identifier characters in the `path` will be replaced withÁ üØ{& # `_` in the generated config value.ÁlŠ| Ì Í Ì± Í É D ˜| D
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$Ÿ| ü¾}2 üü|= : Emits the given `cfg` value if `probe_path` returns true.ÁlÅ} Î Ï Ð Î± Ï Ð É D Ó} D
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$Ú} â æ} ü²€- üá~. + Tests whether the given trait can be used.Á ” ú üœA €ó â ú lê Öó üü% " pub trait Probe: TRAIT + Sized {}Á <¦€ ¨‡\¹€ Ñ Ò Ñ± Ò D Å€ D
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Z $Æ€ Ð $Ì€ üƒƒ( ü¸�C @ Emits a config value `has_TRAIT` if `probe_trait` returns true.Á €‚ ú üˆ‚K H Any non-identifier characters in the trait `name` will be replaced withÁ üØ‚& æùtŠƒ Ó Ô Ó± Ô É D ™ƒ D
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[ $šƒ Ð $ ƒ üÁ„3 üþƒ> ; Emits the given `cfg` value if `probe_trait` returns true.ÁtÈ„ Õ Ö × Õ± Ö × É D ׄ D
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\ $Ø„ Ð $Þ„ â ê„ ü«‡, üæ…- * Tests whether the given type can be used.Á ˜† ú ü †A €ó æ† ú lî† Öó Ô€‡ pub type Probe = TYPE;Á <Ÿ‡ ¨‡T²‡ Ø Ù Ø± Ù D ½‡ D
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] $¾‡ Ð $ć üì‰' ü¤ˆA > Emits a config value `has_TYPE` if `probe_type` returns true.Á êˆ ú üòˆJ G Any non-identifier characters in the type `name` will be replaced withÁ üÁ‰& æùló‰ Ú Û Ú± Û É D �Š D
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^ $‚Š Ð $ˆŠ ü§‹2 üåŠ= : Emits the given `cfg` value if `probe_type` returns true.Ál®‹ Ü Ý Þ Ü± Ý Þ É D ¼‹ D
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_ $½‹ Ð $Ë â Ï‹ üŸŽ2 üÊŒ3 0 Tests whether the given expression can be used.Á ‚� ú üŠ�A €ó Ð� ú lØ� Öó üê�$ ! pub fn probe() { let _ = EXPR; }Á <“Ž ¨‡„¦Ž ß à ß± à D ·Ž D
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` $¸Ž ›$¾Ž üò�8 üª�C @ Emits the given `cfg` value if `probe_expression` returns true.Áœù� á â ã á± â ã É D �� D
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a $Ž� ›$”� â � ü‚“0 ü¡‘< 9 Tests whether the given constant expression can be used.Á â‘ ú üê‘A €ó °’ ú l¸’ Öó üÊ’' $ pub const PROBE: () = ((), EXPR).0;Á <ö’ ¨‡t‰“ ä å ä± å D ˜“ D
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b $™“ ›$Ÿ“ üÒ”6 üŒ”A > Emits the given `cfg` value if `probe_constant` returns true.ÁŒÙ” æ ç è æ± ç è É D ë” D
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