408 lines
78 KiB
Plaintext
408 lines
78 KiB
Plaintext
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rust
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$6 #rustc 1.93.0 (254b59607 2026-01-19)Á“õ…·fÊvŠ ¦%g- -c48c539199cbc88bÁ ³VOÐêùÿ²?ÑL¼�§Ì± -a7a40eb546f9e2b0Á á\ƒ¦è3$|]åŒ[IÚ tæ -14b12edc9f8cd90bÁ ë&Gf·Ã ¬ëñq:¤»b -bb76018b1173caf6Áà 9m Ù„«ÐÒþá•c‘B; -030c5b0bba47cc8fÁ rustc_std_workspace_coreÁÛ¹þÓ7>H%¸ÚÉ’› -4b81d37a5530864dÁ üÃùs<Uß7VyóHr#QÏ -c66cc7807550ce25Á miniz_oxideÁõFÖˆÚ™ª‹"ÞXzLVª -62cbc7af83058505Á adler2Á—wÉD‘嵯�|6¨%Œ
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+ -2f171dd2394b4b62Á hashbrownÁ,ïcV¼¨ø¢:Ê\'È߈ -9571ba9e0f6c7a90Á rustc_std_workspace_allocÁ%¥Èxµù·¼5Ä3Bœ -aac566ad65903fa4Á
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std_detectÁMmáýZ^9õ Îà§e˜÷e -2edb296e590136d8Á rustc_demangleÁ@¼§VÉNb˜æ¨fHÌ+V3 -53b132e4a2fa6e26Á cfg_ifÁfÝv�.Å"ÒÜuPp¹ˆ¶ -f76b385d7d4d7f3eÁ addr2lineÁÕú-WiúQVÓ¬
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µT§�5 -fe25100bd73e48e4Á gimliÁ¹xLáÇí÷‘o ±Ñ8£Å -265ba9e6e4f70b3fÁ objectÁÔ³ÝzÓÿ¶ò°öM›¼òü` -9ae0d1f8ea52a318Á memchrÁRÎ÷׎™te~QÓ¿ØC\Ò -0bff3c8e8f4e489eÁ –©H�tGNÏ ·ˆ!á -d69228d077d46f36Á testsÁ,Ô à$É “ 6
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errorÁ descriptionÁ œ Í from_exitÁ from_ioÁ from_numÁ from_utf8Á ÷ ‚ % %%%%%% ,• - , commandÁ ,ª 0 try_versionÁ % get_rustc_wrapperÁ ª 4 44444 :• : from_commandÁ < Å
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rerun_pathÁ rerun_envÁ emit_possibilityÁ • D• D with_dirÁ F™ D¶ D
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StdioÁ,è ˜/ ATOMIC_USIZE_INITÁŒ› „¸ b\Æ ®¸ ÕDÓ Ð´ ”,ù p $�,— † 3í<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 Ë ì Ë dð ## UsageÁ ý Ë ü�" Add this to your `Cargo.toml`:Á ¤ Ë \¨ ```tomlÁ Ä´ [build-dependencies]Á ŒÍ autocfg = "1"Á <ß ```Á ç Ë 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 Ë \� ```rustÁ Ì� extern crate autocfg;Á § Ë |« 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 ° Ë ü´C @ // (optional) We don't need to rerun for anything external.Á üø( % autocfg::rerun_path("build.rs");Á ,¡ }Á <§ lj ¯ Ë 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 Ë tã ## CautionÁ ò Ë üö R O Many of the probing methods of `AutoCfg` document the particular template theyÁ üÉ
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< ó <±4Ð < ܤ = ô¤ = ‘¥ = = < = Ò ¾ „° ‚´û ü’3 0 Writes a config flag for rustc on standard out.Á Æ Ë üÊ* ' This looks like: `cargo:rustc-cfg=CFG`Á õ Ë üù@ = Cargo will use this in arguments to rustc, like `--cfg CFG`.Á º Ë 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 « Ë ü¯K H [check-cfg-flags]: https://blog.rust-lang.org/2024/05/06/check-cfg.htmlÁ$‚ · · ¾ Œ
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? ¢ ‡ ìÏ üÀL I Writes a line telling Cargo to rerun the build script if `path` changes.Á � Ë ü‘2 / This looks like: `cargo:rerun-if-changed=PATH`Á Ä Ë 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 ¸ ¸ ¾ ç
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@ ª $á ÜÓ ü£ L I Writes a line telling Cargo to rerun the build script if the environmentÁ Üð variable `var` changes.Á Œ Ë ü� 5 2 This looks like: `cargo:rerun-if-env-changed=VAR`Á Æ Ë üÊ P M This requires at least cargo 0.21.0, corresponding to rustc 1.20.0. EarlierÁ ü› 7 Š´LÚ ¹ ¹ ¾ é
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A š ä üÕ&" ü¨ m j Indicates to rustc that a config flag should not generate an [`unexpected_cfgs` warning][check-cfg-flags]Á –! Ë üš!4 1 This looks like `cargo:rustc-check-cfg=cfg(VAR)`Á Ï! Ë üÓ!e b As of rust 1.80, the compiler does [automatic checking of cfgs at compile time][check-cfg-flags].Á ü¹"[ X All custom configuration flags must be known to rustc, or they will generate a warning.Á ü•#T Q This is done automatically when calling the builtin emit methods on [`AutoCfg`],Á üê#A > but not when calling [`autocfg::emit`](crate::emit) directly.Á ¬$ Ë ü°$@ = Versions before rust 1.80 will simply ignore this directive.Á ñ$ Ë 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 …& Ë ü‰&K ï°„Ü& º º ¾ ò&
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B ¢ í& ¼�( ü±'% " Creates a new `AutoCfg` instance.Á ×' Ë dÛ' # PanicsÁ è' Ë üì'0 - Panics if `AutoCfg::new()` returns an error.Á ¤( ©
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C dÖ( © EFHIJKLMNPRTUVWXYZ[\]^_`abc ü•+# üé(% ´¿ “) Ë œ›) # Common errorsÁ ³) Ë 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 �+ Ë œ+ Úq D D
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E üŽ/@ üä,I F Creates a new `AutoCfg` instance with the specified output directory.Á ²- Ë œº- ÒÁ Ò- Ë üÚ-? ùÁ üž.6 Á üÙ.( % - `dir` is not a writable directory.Á †/ ËD•/ ñ_Úq D ™ G G D ©âñ_ ž/ ÷ñ_†- l¡/
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Fñ_»y…*$& äú? ü×8B ? Returns whether `AutoCfg` is using `#![no_std]` in its probes.Á ž9 Ë ü¦9K H This is automatically detected during construction -- if an empty probeÁ üö9J G fails while one with `#![no_std]` succeeds, then the attribute will beÁ üÅ:H E use
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$»t üªv, üÚuK H Emits a config value `has_CRATE` if `probe_sysroot_crate` returns true.Á”±v È É È© É ¾ D Äv D
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$Ëv üÐy, ü”x- * Tests whether the given path can be used.Á Æx Ë üÎxA ·ó ”y Ë lœy ‹ô Œ®y pub use PATH;Á <Äy ljT×y Ê Ë Ê© Ë D ây D
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W $ãy ª $éy üƒ|' üÀzA > Emits a config value `has_PATH` if `probe_path` returns true.Á †{ Ë 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 ¾ D ˜| D
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Y $Ô} ª $Ú} ¢ æ} ü²€- üá~. + Tests whether the given trait can be used.Á ” Ë üœA ·ó â Ë lê ‹ô üü% " pub trait Probe: TRAIT + Sized {}Á <¦€ lj\¹€ Ñ Ò Ñ© Ò D Å€ D
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$Ì€ üƒƒ( ü¸�C @ Emits a config value `has_TRAIT` if `probe_trait` returns true.Á €‚ Ë üˆ‚K H Any non-identifier characters in the trait `name` will be replaced withÁ üØ‚& ŠútŠƒ Ó Ô Ó© Ô ¾ D ™ƒ D
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$ć üì‰' ü¤ˆA > Emits a config value `has_TYPE` if `probe_type` returns true.Á êˆ Ë üòˆJ G Any non-identifier characters in the type `name` will be replaced withÁ üÁ‰& Šúló‰ Ú Û Ú© Û ¾ D �Š D
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