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2025-08-16library: Migrate from `cfg_if` to `cfg_select`Josh Triplett-0/+1
Migrate the standard library from using the external `cfg_if` crate to using the now-built-in `cfg_select` macro. This does not yet eliminate the dependency from `library/std/Cargo.toml`, because while the standard library itself no longer uses `cfg_if`, it also incorporates the `backtrace` crate, which does. Migration assisted by the following vim command (after selecting the full `cfg_if!` invocation): ``` '<,'>s/\(cfg_if::\)\?cfg_if/cfg_select/ | '<,'>s/^\( *\)} else {/\1}\r\1_ => {/c | '<,'>s/^\( *\)} else if #\[cfg(\(.*\))\] /\1}\r\1\2 => /e | '<,'>s/if #\[cfg(\(.*\))\] {/\1 => {/e ``` This is imperfect, but substantially accelerated the process. This prompts for confirmation on the `} else {` since that can also appear inside one of the arms. This also requires manual intervention to handle any multi-line conditions.
2025-07-31Remove `std`'s dependency on `compiler-builtins`Trevor Gross-1/+0
`compiler-builtins` is already in the crate graph via `alloc`, and all features related to `compiler-builtins` goes through `alloc`. There isn't any reason that `std` needs this direct dependency, so remove it.
2025-07-28Rollup merge of #144471 - tgross35:compiler-builtins-asm, r=AmanieuMatthias Krüger-2/+0
Remove `compiler-builtins-{no-asm,mangled-names}` Remove `compiler-builtins-no-asm` This feature used to be for when Cranelift didn't support inline assembly, but its last uses were removed in 52933e0bd200 ("Don't disable inline asm usage in compiler-builtins when the cranelift backend is enabled"). and cba05a7a14b3 ("Support naked functions"). This doesn't remove the feature from the `compiler-builtins` crate, that will be done separately in the subtree repo. --- Remove `compiler-builtins-mangled-names` This config was added in 207de019dc67 ("libary: Forward compiler-builtins "asm" and "mangled-names" feature") but it does not appear this has ever been used. The PR adding it (rust-lang/rust#78472) says that this was exposed to help with configuration and points at the [Hermit Cargo config], but as far as I can tell, this feature name has never been mentioned in that repository's git history. Thus, clean up a seemingly unneeded feature. [Hermit Cargo config]: https://github.com/hermit-os/hermit-rs/blob/ab2b830930e6a9a98c8294997a8183feeabeda4a/.cargo/config
2025-07-26Auto merge of #144490 - tgross35:rollup-ps0utme, r=tgross35bors-1/+1
Rollup of 9 pull requests Successful merges: - rust-lang/rust#140871 (Don't lint against named labels in `naked_asm!`) - rust-lang/rust#141663 (rustdoc: add ways of collapsing all impl blocks) - rust-lang/rust#143272 (Upgrade the `fortanix-sgx-abi` dependency) - rust-lang/rust#143585 (`loop_match`: suggest extracting to a `const` item) - rust-lang/rust#143698 (Fix unused_parens false positive) - rust-lang/rust#143859 (Guarantee 8 bytes of alignment in Thread::into_raw) - rust-lang/rust#144160 (tests: debuginfo: Work around or disable broken tests on powerpc) - rust-lang/rust#144412 (Small cleanup: Use LocalKey<Cell> methods more) - rust-lang/rust#144431 (Disable has_reliable_f128_math on musl targets) r? `@ghost` `@rustbot` modify labels: rollup
2025-07-26Rollup merge of #143272 - tgross35:bump-fortanix, r=jhpratt,jethrogbTrevor Gross-1/+1
Upgrade the `fortanix-sgx-abi` dependency 0.6.1 removes the `compiler-builtins` dependency, part of RUST-142265. The breaking change from 0.5 to 0.6 is for an update to the `insecure_time` API [1]. I validated that `./x c library --target x86_64-fortanix-unknown-sgx` completes successfully with this change. Link: https://github.com/fortanix/rust-sgx/commit/a34e9767f37d6585c18bdbd31cddcadc56670d57 [1]
2025-07-25Remove `compiler-builtins-mangled-names`Trevor Gross-1/+0
This config was added in 207de019dc67 ("libary: Forward compiler-builtins "asm" and "mangled-names" feature") but it does not appear this has ever been used. The PR adding it (RUST-78472) says that this was exposed to help with configuration and points at the [Hermit Cargo config], but as far as I can tell, this feature name has never been mentioned in that repository's git history. Thus, clean up a seemingly unneeded feature. [Hermit Cargo config]: https://github.com/hermit-os/hermit-rs/blob/ab2b830930e6a9a98c8294997a8183feeabeda4a/.cargo/config
2025-07-25Remove `compiler-builtins-no-asm`Trevor Gross-1/+0
This feature used to be for when Cranelift didn't support inline assembly, but its last uses were removed in 52933e0bd200 ("Don't disable inline asm usage in compiler-builtins when the cranelift backend is enabled"). and cba05a7a14b3 ("Support naked functions"). This doesn't remove the feature from the `compiler-builtins` crate, that will be done separately in the subtree repo.
2025-07-23Update `dlmalloc` dependency of libstdAlex Crichton-1/+1
This primarily pulls in alexcrichton/dlmalloc-rs/55 and alexcrichton/dlmalloc-rs/54 to address 144199. Notably the highest byte in the wasm address space is no longer allocatable and additionally the allocator internally uses `wrapping_add` instead of `add` on pointers since on 32-bit platforms offsets might be larger than half the address space.
2025-07-22Make `std_detect` a direct dependency of `std`Jakub Beránek-5/+2
2025-07-17Rollup merge of #143856 - mladedav:dm/private-reexport, r=petrochenkovLeón Orell Valerian Liehr-1/+1
Linting public reexport of private dependencies Part of public/private dependencies rust-lang/rust#44663 Partially addresses rust-lang/rust#71043 I'm adding a warning for reexports of private dependencies into `rustc_resolve`. I get that this should not be a warning, but should instead be a lint to be controlled by the feature gate, but I did not figure out how exactly to do that at that point. I tried doing the same thing as is done in `rustc_privacy`, but the linting system is not ready yet as far as I understand the error I got, so I made a warning for now instead. Some guidance on how to emit lints with `dcx` would be appreciated. This also sets the `std_detect` crate as a public dependency of `std` because some macros are reexported from there. I did not check closer, but the other option may be to allow the specific reexports instead.
2025-07-15make `std_detect` public dependency of `std`David Mládek-1/+1
2025-07-14Add experimental backtrace-trace-only std featureChris Denton-0/+3
2025-07-09Add opaque TypeId handles for CTFEOli Scherer-2/+0
2025-07-01Update `cfg(bootstrap)`Josh Stone-2/+0
2025-07-01Upgrade the `fortanix-sgx-abi` dependencyTrevor Gross-1/+1
0.6.1 removes the `compiler-builtins` dependency, part of RUST-142265. The breaking change from 0.5 to 0.6 is for an update to the `insecure_time` API [1]. I validated that `./x c library --target x86_64-fortanix-unknown-sgx` completes successfully with this change. Link: https://github.com/fortanix/rust-sgx/commit/a34e9767f37d6585c18bdbd31cddcadc56670d57 [1]
2025-06-24Avoid exporting panic_unwind as stdlib cargo featurebjorn3-1/+1
There is already panic-unwind to enable it.
2025-06-11Upgrade the standard library `addr2line` versionTrevor Gross-1/+1
0.25.0 is a breaking change only because it upgrades the `gimli` version. It also includes a change to the `compiler-builtins` dependency that helps with [1]. Changelog: https://github.com/gimli-rs/addr2line/blob/master/CHANGELOG.md#0250-20250611 [1]: https://github.com/rust-lang/rust/issues/142265
2025-06-11Upgrade the standard library `object` versionTrevor Gross-2/+2
0.37.0 is a semver-breaking release but the only breakage is in `elf::R_RISCV_GNU_*` and `pe::IMAGE_WEAK_EXTERN_*` constants, as well as Mach-O dyld. This API is not used by `std`, so we should be fine to upgrade. This new version also includes functionality for parsing Wasm object files that we may eventually like to make use of. Also includes the minor bump from 0.37.0 to 0.37.1 to help [1]. Changelog: https://github.com/gimli-rs/object/blob/master/CHANGELOG.md#0370 [1]: https://github.com/rust-lang/rust/issues/142265
2025-06-09Rollup merge of #141993 - tgross35:use-in-tree-builtins, r=bjorn3Trevor Gross-1/+1
Use the in-tree `compiler-builtins` for the sysroot Many of `std`'s dependency have a dependency on the crates.io `compiler-builtins` when used with the feature `rustc-std-workspace-core`. Use a Cargo patch to select the in-tree version instead. `compiler-builtins` is also added as a dependency of `rustc-std-workspace-core` so these crates can remove their crates.io dependency in the future. Zulip discussion: [#t-compiler > Using in-tree compiler-builtins](https://rust-lang.zulipchat.com/#narrow/channel/131828-t-compiler/topic/Using.20in-tree.20compiler-builtins/with/522445336) Once this merges, the following PRs will need to make it to a release for the relevant crates: - https://github.com/rust-lang/getopts/pull/119 (can merge at any time) - https://github.com/rust-lang/hashbrown/pull/625 (can merge at any time) - https://github.com/rust-lang/stdarch/pull/1825 - https://github.com/rust-lang/rustc-demangle/pull/80 - https://github.com/rust-lang/cfg-if/pull/84 - https://github.com/unicode-rs/unicode-width/pull/77 The above should cover all tier 1 targets with no `std` features enabled. The remaining cover the rest: - https://github.com/alexcrichton/dlmalloc-rs/pull/50 (wasm, xous, sgx) - https://github.com/gimli-rs/gimli/pull/769 - https://github.com/r-efi/r-efi/pull/89 (efi) - https://github.com/r-efi/r-efi-alloc/pull/9 (efi) - https://github.com/fortanix/rust-sgx/pull/770 (sgx) - https://github.com/hermit-os/hermit-rs/pull/718 (hermit) - https://github.com/bytecodealliance/wasi-rs/pull/108 (wasi) - https://github.com/gimli-rs/addr2line/pull/345 - https://github.com/oyvindln/adler2/pull/2 - https://github.com/BurntSushi/memchr/pull/180 - https://github.com/Frommi/miniz_oxide/pull/173 - https://github.com/gimli-rs/object/pull/777 try-job: x86_64-gnu try-job: test-various
2025-06-08Use the in-tree `compiler-builtins`Trevor Gross-1/+1
Many of `std`'s dependency have a dependency on the crates.io `compiler-builtins` when used with the feature `rustc-std-workspace-core`. Use a Cargo patch to select the in-tree version instead. `compiler-builtins` is also added as a dependency of `rustc-std-workspace-core` so these crates can remove their crates.io dependency in the future.
2025-06-06Add new Tier-3 targets: `loongarch32-unknown-none*`WANG Rui-0/+2
MCP: https://github.com/rust-lang/compiler-team/issues/865
2025-06-02Remove more library bootstrapJosh Stone-1/+0
2025-05-30Update `compiler-builtins` to 0.1.160Trevor Gross-1/+1
Includes the following changes: * Enable `__powitf2` on MSVC [1] * Update `CmpResult` to use a pointer-sized return type [2] * Better code reuse between `libm` and `compiler-builtins` [3], [4] * Stop building C versions of `__netf2` [5] since we have our own implementation [1]: https://github.com/rust-lang/compiler-builtins/pull/918 [2]: https://github.com/rust-lang/compiler-builtins/pull/920 [3]: https://github.com/rust-lang/compiler-builtins/pull/879 [4]: https://github.com/rust-lang/compiler-builtins/pull/925 [5]: https://github.com/rust-lang/compiler-builtins/pull/828
2025-05-13bump compiler_builtinsPietro Albini-1/+1
2025-05-07Rollup merge of #140724 - tgross35:update-builtins, r=tgross35Guillaume Gomez-1/+1
Update `compiler-builtins` to 0.1.158 Includes the following changes: * Require `target_has_atomic = "ptr"` for runtime feature detection [1] [1]: https://github.com/rust-lang/compiler-builtins/pull/909
2025-05-07Rollup merge of #140398 - Berrysoft:cygwin-backtrace, r=tgross35Guillaume Gomez-1/+1
Fix backtrace for cygwin Closes #140304 Depends on: - [x] https://github.com/rust-lang/backtrace-rs/pull/704 This PR could not be merged until the above PR is merged. I'll update the submodule then. EDIT: submodule updated.
2025-05-07Fix backtrace for cygwin王宇逸-1/+1
2025-05-06Update `compiler-builtins` to 0.1.158Trevor Gross-1/+1
Includes the following changes: * Require `target_has_atomic = "ptr"` for runtime feature detection [1]: https://github.com/rust-lang/compiler-builtins/pull/909
2025-05-04Update `compiler-builtins` to 0.1.157Trevor Gross-1/+1
Includes the following changes: * Use runtime feature detection for fma routines on x86 [1] Fixes: https://github.com/rust-lang/rust/issues/140452 [1]: https://github.com/rust-lang/compiler-builtins/pull/896
2025-05-01Update stdarchsayantn-1/+0
2025-04-28Rollup merge of #140323 - tgross35:cfg-unstable-float, r=UrgauChris Denton-0/+6
Implement the internal feature `cfg_target_has_reliable_f16_f128` Support for `f16` and `f128` is varied across targets, backends, and backend versions. Eventually we would like to reach a point where all backends support these approximately equally, but until then we have to work around some of these nuances of support being observable. Introduce the `cfg_target_has_reliable_f16_f128` internal feature, which provides the following new configuration gates: * `cfg(target_has_reliable_f16)` * `cfg(target_has_reliable_f16_math)` * `cfg(target_has_reliable_f128)` * `cfg(target_has_reliable_f128_math)` `reliable_f16` and `reliable_f128` indicate that basic arithmetic for the type works correctly. The `_math` versions indicate that anything relying on `libm` works correctly, since sometimes this hits a separate class of codegen bugs. These options match configuration set by the build script at [1]. The logic for LLVM support is duplicated as-is from the same script. There are a few possible updates that will come as a follow up. The config introduced here is not planned to ever become stable, it is only intended to replace the build scripts for `std` tests and `compiler-builtins` that don't have any way to configure based on the codegen backend. MCP: https://github.com/rust-lang/compiler-team/issues/866 Closes: https://github.com/rust-lang/compiler-team/issues/866 [1]: https://github.com/rust-lang/rust/blob/555e1d0386f024a8359645c3217f4b3eae9be042/library/std/build.rs#L84-L186 --- The second commit makes use of this config to replace `cfg_{f16,f128}{,_math}` in `library/`. I omitted providing a `cfg(bootstrap)` configuration to keep things simpler since the next beta branch is in two weeks. try-job: aarch64-gnu try-job: i686-msvc-1 try-job: test-various try-job: x86_64-gnu try-job: x86_64-msvc-ext2
2025-04-27Use `feature(target_has_reliable_f16_f128)` in library testsTrevor Gross-0/+6
New compiler configuration has been introduced that is designed to replace the build script configuration `reliable_f16`, `reliable_f128`, `reliable_f16_math`, and `reliable_f128_math`. Do this replacement here, which allows us to clean up `std`'s build script. All tests are gated by `#[cfg(bootstrap)]` rather than doing a more complicated `cfg(bootstrap)` / `cfg(not(bootstrap))` split since the next beta split is within two weeks.
2025-04-26uefi: Update r-efiAyush Singh-2/+2
- Bump up the version to 5.2.0 Signed-off-by: Ayush Singh <ayush@beagleboard.org>
2025-04-23Rollup merge of #140146 - tgross35:update-builtins, r=tgross35Chris Denton-1/+1
Update `compiler_builtins` to 0.1.156 Includes the following changes: * Provide `abort` on AVR [1] [1]: https://github.com/rust-lang/compiler-builtins/pull/830
2025-04-22Update `compiler_builtins` to 0.1.156Trevor Gross-1/+1
Includes the following changes: * Provide `abort` on AVR [1] [1]: https://github.com/rust-lang/compiler-builtins/pull/830
2025-04-20Update `libc` to 0.2.172 for std王宇逸-1/+1
2025-04-17Update `compiler-builtins` to 0.1.155Trevor Gross-1/+1
Includes the following changes: * Replace `#[naked]` with `#[unsafe(naked)]` [1] [2] * Replace `bl!` with `asm_sym` [3] [1]: https://github.com/rust-lang/compiler-builtins/pull/817 [2]: https://github.com/rust-lang/compiler-builtins/pull/821 [3]: https://github.com/rust-lang/compiler-builtins/pull/820
2025-04-10Update `compiler-builtins` to 0.1.153Trevor Gross-1/+1
Includes the following changes: * Avoid OOB access in `memcpy` and `memmove` [1] * Enable intrinsics on AVR [2] * `libm` updates to avoid using `core::arch` vector intrinsics [3] * Re-enable `f16` on aarch64 without Neon [4] [1]: https://github.com/rust-lang/compiler-builtins/pull/799 [2]: https://github.com/rust-lang/compiler-builtins/pull/791 [3]: https://github.com/rust-lang/compiler-builtins/pull/814 [4]: https://github.com/rust-lang/compiler-builtins/pull/809
2025-03-24Update `compiler-builtins` to 0.1.152Trevor Gross-1/+1
Includes the following changes related to unordered atomics: * Remove element_unordered_atomic intrinsics [1] * Remove use of `atomic_load_unordered` and undefined behaviour [2] There are a handful of other small changes, but nothing else user-visible. [1]: https://github.com/rust-lang/compiler-builtins/pull/789 [2]: https://github.com/rust-lang/compiler-builtins/pull/790
2025-03-13Auto merge of #138450 - matthiaskrgr:rollup-4im25vf, r=matthiaskrgrbors-1/+1
Rollup of 6 pull requests Successful merges: - #137816 (attempt to support `BinaryFormat::Xcoff` in `naked_asm!`) - #138109 (make precise capturing args in rustdoc Json typed) - #138343 (Enable `f16` tests for `powf`) - #138356 (bump libc to 0.2.171 to fix xous) - #138371 (Update compiletest's `has_asm_support` to match rustc) - #138404 (Cleanup sysroot locating a bit) r? `@ghost` `@rustbot` modify labels: rollup
2025-03-13Rollup merge of #138356 - betrusted-io:bump-libc-0.2.171, r=jhprattMatthias Krüger-1/+1
bump libc to 0.2.171 to fix xous Due to a reorganization in the `libc` crate, the `xous` target broke with version `0.2.170`. Bump libc to `0.2.171` to fix nightly.
2025-03-13Rollup merge of #138162 - ehuss:library-2024, r=cuviperMatthias Krüger-1/+1
Update the standard library to Rust 2024 This updates the standard library to Rust 2024. This includes the following notable changes: - Macros are updated to use new expression fragment specifiers. This PR includes a test to illustrate the changes, primarily allowing `const {...}` expressions now. - Some tests show a change in MIR drop order. We do not believe this will be an observable change ([see zulip discussion](https://rust-lang.zulipchat.com/#narrow/channel/268952-edition/topic/standard.20library.20migration/near/500972873)). Fixes https://github.com/rust-lang/rust/issues/133081
2025-03-11Migrate std to Rust 2024Eric Huss-1/+1
2025-03-11bump libc to 0.2.171 to fix xousSean Cross-1/+1
Due to a reorganization in the `libc` crate, the `xous` target broke with version `0.2.170`. Bump libc to `0.2.171` to fix nightly. Signed-off-by: Sean Cross <sean@xobs.io>
2025-03-09Update hermit-abi to 0.5.0Thalia Archibald-1/+1
2025-03-06Rollup merge of #138038 - tgross35:update-builtins, r=tgross35Michael Goulet-1/+1
Update `compiler-builtins` to 0.1.151 This enables `f16` builtins for loongarch [1] and adds support for Cygwin [2]. [1]: https://github.com/rust-lang/compiler-builtins/pull/770 [2]: https://github.com/rust-lang/compiler-builtins/pull/774 try-job: dist-loongarch64-linux try-job: dist-loongarch64-musl
2025-03-05Rollup merge of #137463 - sunshowers:illumos-posix-spawn, r=Mark-Simulacrum许杰友 Jieyou Xu (Joe)-1/+1
[illumos] attempt to use posix_spawn to spawn processes illumos has `posix_spawn`, and the very newest versions also have `_addchdir`, so use that. POSIX standardized this function so I also added a weak symbol lookup for the non `_np` version. (illumos has both.) This probably also works on Solaris, but I don't have access to an installation to validate this so I decided to focus on illumos instead. This is a nice ~4x performance improvement for process creation. My go-to as usual is nextest against the clap repo, which acts as a stress test for process creation -- with [this commit]: ```console $ cargo nextest run -E 'not test(ui_tests) and not test(example_tests)' before: Summary [ 1.747s] 879 tests run: 879 passed, 2 skipped after: Summary [ 0.445s] 879 tests run: 879 passed, 2 skipped ``` [this commit]: https://github.com/clap-rs/clap/commit/fde45f9aea766fb8de46e3d46e6575f393c3b6b9
2025-03-05Update `compiler-builtins` to 0.1.151Trevor Gross-1/+1
This enables `f16` builtins for loongarch [1] and adds support for Cygwin [2]. [1]: https://github.com/rust-lang/compiler-builtins/pull/770 [2]: https://github.com/rust-lang/compiler-builtins/pull/774
2025-03-01Update `compiler-builtins` to 0.1.150Trevor Gross-1/+1
Includes a change to make a subset of math symbols available on all platforms [1], and disables `f16` on aarch64 without neon [2]. [1]: https://github.com/rust-lang/compiler-builtins/pull/763 [2]: https://github.com/rust-lang/compiler-builtins/pull/775
2025-02-24Update `compiler-builtins` to 0.1.148Trevor Gross-1/+1
Includes `f16` symbols on MIPS [1], updates for `libm` [2], and reapplies the patch that drops the `public_test_deps!` macro [3]. [1]: https://github.com/rust-lang/compiler-builtins/pull/762 [2]: https://github.com/rust-lang/compiler-builtins/pull/765 [3]: https://github.com/rust-lang/compiler-builtins/pull/766
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