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Jonathan Brouwer a1d588b35e
Rollup merge of #150992 - cezarbbb:cstyle-export-rules2, r=bjorn3,petrochenkov 
link modifier `export-symbols`: export all global symbols from selected uptream c static libraries

In order to be able to export symbols from a specified upstream C static library, I redesigned a solution that, compared to a previous PR rust-lang/rust#150335 I submitted, will not have any extra symbols leaking out.

The following points should be noted:
 - This attribute will select and import the `Global` symbols of the first matching library it finds.
 - Developers should ensure that there are no libraries with the same name.
 - This modifier is only compatible with `static` linking kind
 - By default, upstream C static libraries will not export their `Global` symbols regardless of whether `LTO` optimization is enabled. However, after enabling this attribute, if the upstream C static library has `LTO` optimization enabled, the compiler will issue an error to inform the developer that the linked C library is invalid.

The test code is the same as the PR rust-lang/rust#150335.
Here are the results:
1. `cargo +include-libs rustc --release -- -L. -lstatic:+export-symbols=c_add`
(or you can use `#[link(name = "c_add", kind= "static", modifier = "+export-symbols")]` in the file)
```bash
                 U abort@GLIBC_2.2.5
                 U bcmp@GLIBC_2.2.5
0000000000014f60 T c_add
                 U calloc@GLIBC_2.2.5
                 U close@GLIBC_2.2.5
0000000000014f70 T c_sub
                 w __cxa_finalize@GLIBC_2.2.5
                 w __cxa_thread_atexit_impl@GLIBC_2.18
                 U dl_iterate_phdr@GLIBC_2.2.5
0000000000014ee0 T downstream_add
                 U __errno_location@GLIBC_2.2.5
                 U free@GLIBC_2.2.5
                 U fstat64@GLIBC_2.33
                 U getcwd@GLIBC_2.2.5
                 U getenv@GLIBC_2.2.5
                 w __gmon_start__
                 w _ITM_deregisterTMCloneTable
                 w _ITM_registerTMCloneTable
                 U lseek64@GLIBC_2.2.5
                 U malloc@GLIBC_2.2.5
                 U memcpy@GLIBC_2.14
                 U memmove@GLIBC_2.2.5
                 U memset@GLIBC_2.2.5
                 U mmap64@GLIBC_2.2.5
                 U munmap@GLIBC_2.2.5
                 U open64@GLIBC_2.2.5
                 U posix_memalign@GLIBC_2.2.5
                 U pthread_key_create@GLIBC_2.34
                 U pthread_key_delete@GLIBC_2.34
                 U pthread_setspecific@GLIBC_2.34
                 U read@GLIBC_2.2.5
                 U readlink@GLIBC_2.2.5
                 U realloc@GLIBC_2.2.5
                 U realpath@GLIBC_2.3
                 U stat64@GLIBC_2.33
                 w statx@GLIBC_2.28
                 U strlen@GLIBC_2.2.5
                 U syscall@GLIBC_2.2.5
                 U __tls_get_addr@GLIBC_2.3
                 U _Unwind_Backtrace@GCC_3.3
                 U _Unwind_DeleteException@GCC_3.0
                 U _Unwind_GetDataRelBase@GCC_3.0
                 U _Unwind_GetIP@GCC_3.0
                 U _Unwind_GetIPInfo@GCC_4.2.0
                 U _Unwind_GetLanguageSpecificData@GCC_3.0
                 U _Unwind_GetRegionStart@GCC_3.0
                 U _Unwind_GetTextRelBase@GCC_3.0
                 U _Unwind_RaiseException@GCC_3.0
                 U _Unwind_Resume@GCC_3.0
                 U _Unwind_SetGR@GCC_3.0
                 U _Unwind_SetIP@GCC_3.0
                 U write@GLIBC_2.2.5
                 U writev@GLIBC_2.2.5
```
3. `cargo +nightly rustc --release -- -L ./`
```bash
                 U abort@GLIBC_2.2.5
                 U bcmp@GLIBC_2.2.5
                 U calloc@GLIBC_2.2.5
                 U close@GLIBC_2.2.5
                 w __cxa_finalize@GLIBC_2.2.5
                 w __cxa_thread_atexit_impl@GLIBC_2.18
                 U dl_iterate_phdr@GLIBC_2.2.5
0000000000011e10 T downstream_add
                 U __errno_location@GLIBC_2.2.5
                 U free@GLIBC_2.2.5
                 U fstat64@GLIBC_2.33
                 U getcwd@GLIBC_2.2.5
                 U getenv@GLIBC_2.2.5
                 w gettid@GLIBC_2.30
                 w __gmon_start__
                 w _ITM_deregisterTMCloneTable
                 w _ITM_registerTMCloneTable
                 U lseek64@GLIBC_2.2.5
                 U malloc@GLIBC_2.2.5
                 U memcpy@GLIBC_2.14
                 U memmove@GLIBC_2.2.5
                 U memset@GLIBC_2.2.5
                 U mmap64@GLIBC_2.2.5
                 U munmap@GLIBC_2.2.5
                 U open64@GLIBC_2.2.5
                 U posix_memalign@GLIBC_2.2.5
                 U pthread_key_create@GLIBC_2.34
                 U pthread_key_delete@GLIBC_2.34
                 U pthread_setspecific@GLIBC_2.34
                 U read@GLIBC_2.2.5
                 U readlink@GLIBC_2.2.5
                 U realloc@GLIBC_2.2.5
                 U realpath@GLIBC_2.3
                 U stat64@GLIBC_2.33
                 w statx@GLIBC_2.28
                 U strlen@GLIBC_2.2.5
                 U syscall@GLIBC_2.2.5
                 U __tls_get_addr@GLIBC_2.3
                 U _Unwind_Backtrace@GCC_3.3
                 U _Unwind_GetDataRelBase@GCC_3.0
                 U _Unwind_GetIP@GCC_3.0
                 U _Unwind_GetIPInfo@GCC_4.2.0
                 U _Unwind_GetLanguageSpecificData@GCC_3.0
                 U _Unwind_GetRegionStart@GCC_3.0
                 U _Unwind_GetTextRelBase@GCC_3.0
                 U _Unwind_RaiseException@GCC_3.0
                 U _Unwind_Resume@GCC_3.0
                 U _Unwind_SetGR@GCC_3.0
                 U _Unwind_SetIP@GCC_3.0
                 U write@GLIBC_2.2.5
                 U writev@GLIBC_2.2.5
```

r? @bjorn3
2026-02-04 14:39:17 +01:00
.github Use DEVELOPER_DIR instead of a custom xcode-select script 2026-02-03 20:14:52 +01:00
compiler Rollup merge of #150992 - cezarbbb:cstyle-export-rules2, r=bjorn3,petrochenkov 2026-02-04 14:39:17 +01:00
library Rollup merge of #152029 - RalfJung:miri-socket-tests, r=Mark-Simulacrum 2026-02-03 18:54:50 +01:00
LICENSES Synchronize Unicode license text from unicode.org 2024-11-20 00:54:12 -08:00
src Rollup merge of #152060 - heiher:opt-loong64-linux, r=Kobzol 2026-02-04 08:12:41 +01:00
tests Rollup merge of #150992 - cezarbbb:cstyle-export-rules2, r=bjorn3,petrochenkov 2026-02-04 14:39:17 +01:00
.clang-format Add .clang-format 2024-06-26 05:56:00 +08:00
.editorconfig editorconfig: don't use nonexistant syntax 2025-08-24 10:37:19 -05:00
.git-blame-ignore-revs git: ignore 60600a6fa4 for blame purposes 2025-04-17 11:50:24 +08:00
.gitattributes Mark .pp files as Rust 2025-03-29 12:39:06 +01:00
.gitignore ignore build-rust-analyzer even if it's a symlink 2025-11-12 16:41:41 +01:00
.gitmodules Update to LLVM 22 2026-01-27 12:09:39 +01:00
.ignore change config.toml to bootstrap.toml for bootstrap module 2025-03-17 12:56:41 +05:30
.mailmap Add temporary new bors e-mail address to the mailmap 2026-01-14 18:01:50 +01:00
bootstrap.example.toml Change how we build offload as a single Step 2025-12-22 23:50:11 +01:00
Cargo.lock Convert to inline diagnostics in rustc_interface 2026-02-04 08:10:10 +01:00
Cargo.toml Bump Clippy version -> 0.1.95 2026-01-22 16:55:20 +01:00
CODE_OF_CONDUCT.md Remove the code of conduct; instead link https://www.rust-lang.org/conduct.html 2019-10-05 22:55:19 +02:00
configure Ensure ./configure works when configure.py path contains spaces 2024-02-16 18:57:22 +00:00
CONTRIBUTING.md chore: remove dead links 2025-09-22 10:15:50 +01:00
COPYRIGHT dist: Re-work how we describe the licence of Rust in our distributions 2024-12-09 10:18:55 +00:00
INSTALL.md Rename rust.use-lld to rust.bootstrap-override-lld in INSTALL.md 2026-01-14 14:20:45 -06:00
LICENSE-APACHE Remove appendix from LICENCE-APACHE 2019-12-30 14:25:53 +00:00
license-metadata.json Update license metadata 2025-02-15 16:48:37 +01:00
LICENSE-MIT dist: Re-work how we describe the licence of Rust in our distributions 2024-12-09 10:18:55 +00:00
package.json Update browser-ui-test version to 0.23.3 2026-01-27 21:14:25 +01:00
README.md Update Rust Foundation links in Readme 2025-03-16 19:03:40 -07:00
RELEASES.md relnotes: fix 1.93's as_mut_array methods 2026-01-23 15:54:13 -08:00
REUSE.toml Omit standard copyright notice 2026-01-26 17:31:34 +00:00
rust-bors.toml Add S-blocked to labels_blocking_approval 2026-01-19 16:01:16 +01:00
rustfmt.toml Rename tests/rustdoc into tests/rustdoc-html 2026-01-07 14:23:30 +01:00
triagebot.toml Subscribe myself to translation diagnostics 2026-01-28 22:40:28 +01:00
typos.toml Fix some typos of "similarity" 2026-01-29 23:40:37 +11:00
x Add uv to the list of possible python runners 2026-02-02 13:01:40 +01:00
x.ps1 use & instead of start-process in x.ps1 2023-12-09 09:46:16 -05:00
x.py Reformat Python code with ruff 2024-12-04 23:03:44 +01:00
yarn.lock Update npm package, remove another unused one, and fix some typing errors that started popping when we moved to yarn 2025-11-17 10:58:18 +02:00

README.md

This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.

Why Rust?

  • Performance: Fast and memory-efficient, suitable for critical services, embedded devices, and easily integrated with other languages.

  • Reliability: Our rich type system and ownership model ensure memory and thread safety, reducing bugs at compile-time.

  • Productivity: Comprehensive documentation, a compiler committed to providing great diagnostics, and advanced tooling including package manager and build tool (Cargo), auto-formatter (rustfmt), linter (Clippy) and editor support (rust-analyzer).

Quick Start

Read "Installation" from The Book.

Installing from Source

If you really want to install from source (though this is not recommended), see INSTALL.md.

Getting Help

See https://www.rust-lang.org/community for a list of chat platforms and forums.

Contributing

See CONTRIBUTING.md.

License

Rust is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.

See LICENSE-APACHE, LICENSE-MIT, and COPYRIGHT for details.

Trademark

The Rust Foundation owns and protects the Rust and Cargo trademarks and logos (the "Rust Trademarks").

If you want to use these names or brands, please read the Rust language trademark policy.

Third-party logos may be subject to third-party copyrights and trademarks. See Licenses for details.