rust-lang/libc

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Raw bindings to platform APIs for Rust

Stars: 2.6k
Forks: 1.3k
Open beginner issues: 0
Indexed issues: 105
Avg merge: 1d 22h
Merged PRs (30d): 69

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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105 open issues indexed

KINFO_FILE_SIZE is missing in libc on arm64 Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/libc#5535 · Opened Sep 18, 2026
Redox CI failure Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rust-lang/libc#5520 · Opened Sep 10, 2026
Missing HOST_NAME_MAX constant Open

C-API-request

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

rust-lang/libc#5511 · 1 comment · Opened Sep 7, 2026
Tracking issue: Supporting 64-bit `time_t` on 32-bit platforms Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#5507 · 11 comments · Opened Sep 7, 2026
ctest: allow testing individual modules Open

ctest

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/libc#5457 · 1 reaction · Opened Sep 1, 2026
Dependency Dashboard Open

Difficulty 4/5 3-5 days Newbie friendliness 15/100

rust-lang/libc#5419 · 1 comment · Opened Aug 18, 2026
Remove `posix_spawn*` on tvOS and watchOS? Open

C-bug O-macos

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/libc#5410 · 6 comments · Opened Aug 13, 2026
Remove `getentropy` on iOS/tvOS/watchOS/visionOS? Open

C-bug O-macos

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rust-lang/libc#5409 · 1 comment · Opened Aug 13, 2026
All function pointer types should be `Option<unsafe extern "C" fn(...) -> ...>` Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

rust-lang/libc#5392 · Opened Aug 10, 2026
ctest: Support flexible array members Open

ctest

Difficulty 3/5 1-2 days Newbie friendliness 66/100

rust-lang/libc#5369 · Opened Aug 4, 2026
ctest: Check public API in modules Open

ctest

Difficulty 4/5 3-5 days Newbie friendliness 48/100

rust-lang/libc#5365 · 2 comments · Opened Aug 4, 2026
ctest support for conflicting headers Open

ctest

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#5344 · 13 comments · Opened Jul 31, 2026
memchr signature invites mutability bugs Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

rust-lang/libc#5276 · 10 comments · Opened Jul 12, 2026
1.0: Remove all instances of `link(name = ...)` and delete the `std` feature Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

rust-lang/libc#5265 · 3 comments · Opened Jul 9, 2026
CI: Replace deprecated Android emulator with Cuttlefish Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#5262 · 5 comments · Opened Jul 8, 2026
ctest: Allow `crate_path` in `TestGenerator::generate_files` to be either a `Cargo.toml` or a `.rs` Open

ctest

Difficulty 3/5 1-2 days Newbie friendliness 62/100

rust-lang/libc#5238 · Opened Jul 1, 2026
termios: support arbitrary baud rates with glibc 2.42+ on Linux Open

C-API-request S-blocked

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#5230 · 1 comment · Opened Jun 28, 2026
Windows MSVC/GNU function pointer check issues Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/libc#5227 · 17 comments · Opened Jun 28, 2026
Improve integration testing in ctest. Open

ctest

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/libc#5226 · 2 comments · Opened Jun 28, 2026
Downstream CI for `libc` Open

A-CI C-discussion

Difficulty 1/5 Under an hour Newbie friendliness 68/100

rust-lang/libc#5209 · 2 comments · 1 reaction · Opened Jun 24, 2026
Soundness: UB reading uninitialized union memory in manual PartialEq and Hash implementations Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/libc#5187 · 2 comments · Opened Jun 20, 2026
Look at doing the equivalent of `#define _FILE_OFFSET_BITS 64` on windows-gnu Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

rust-lang/libc#5181 · Opened Jun 19, 2026
Newtypes for all C enums Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

rust-lang/libc#5066 · 7 comments · Opened Apr 20, 2026
Add PATH_MAX and FILENAME_MAX for Windows and Redox Open

C-API-request

Difficulty 3/5 1-2 days Newbie friendliness 68/100

rust-lang/libc#5033 · 4 comments · Opened Mar 27, 2026
How should we handle raw function pointers? Open

C-discussion

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-lang/libc#4998 · 6 comments · Opened Mar 2, 2026
c_void documentation has a broken `[pointer]` link Open

C-bug

Difficulty 1/5 Under an hour Newbie friendliness 58/100

rust-lang/libc#4978 · 3 comments · Opened Feb 15, 2026
Implement `Default` Open

E-help-wanted E-medium

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#4975 · 5 comments · Opened Feb 14, 2026
What time fields should `struct stat` have? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#4965 · 2 comments · Opened Feb 9, 2026
epoll_event cannot carry provenance on user data Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/libc#4885 · 2 comments · Opened Dec 17, 2025
Provide a `wint_t` type alias for more targets Open

C-API-request

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/libc#4832 · Opened Nov 19, 2025
XDP_UMEM_PGOFF_FILL_RING and XDP_UMEM_PGOFF_COMPLETION_RING have an incorrect/inconsistent type Open

C-bug

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

rust-lang/libc#4821 · Opened Nov 5, 2025
1.0: Remove lfs64 API (`open64` and similar) Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

rust-lang/libc#4805 · 1 comment · Opened Oct 30, 2025
Figure out what to do with flexible array members Open

C-discussion

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#4758 · 4 comments · Opened Oct 22, 2025
Remove `flock` where not supported Open

C-bug E-help-wanted

Difficulty 3/5 1-2 days Newbie friendliness 52/100

rust-lang/libc#4723 · 2 comments · Opened Sep 26, 2025
How should we handle glibc symbol versioning? Open

O-gnu

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-lang/libc#4700 · 9 comments · 1 reaction · Opened Sep 18, 2025
`pid_type` and `proc_cm_event` are not tested. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/libc#4680 · Opened Sep 1, 2025
Warning: <type> is not FFI-safe, after recent changes involving `#[non_exhaustive]` Open

C-bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

rust-lang/libc#4651 · 3 comments · Opened Aug 14, 2025
ctest: Figure out a way to test anonymous structs/unions Open

ctest

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/libc#4650 · 2 comments · Opened Aug 13, 2025
ctest: Figure out a way to test private items Open

ctest

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#4649 · 4 comments · Opened Aug 13, 2025
Next MSRV bump Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#4626 · 13 comments · Opened Aug 10, 2025
libresolv Open

C-API-request

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/libc#4611 · 1 comment · 1 reaction · Opened Aug 2, 2025
Deprecate UAPI bindings, to be removed in 1.0 Open

E-help-wanted O-linux

Difficulty 4/5 3-5 days Newbie friendliness 30/100

rust-lang/libc#4573 · 2 comments · 1 reaction · Opened Jul 24, 2025
Is it sound for fixed-length arrays with `NUL`-terminated strings to be `[c_char; N]`? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

rust-lang/libc#4456 · 10 comments · Opened May 20, 2025
Change from `libc-test/semver/*.txt` to `cargo-semver-checks` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/libc#4445 · 1 comment · 3 reactions · Opened May 4, 2025
darwin: add in6_aliasreq, ifaliasreq structs Open

C-API-request

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

rust-lang/libc#4435 · 1 comment · Opened Apr 30, 2025
Remove uses of `enum` Open

I-unsound 💥

Difficulty 5/5 Over a week Newbie friendliness 35/100

rust-lang/libc#4419 · 2 comments · 2 reactions · Opened Apr 15, 2025
ctest: support variadics in function pointers Open

ctest

Difficulty 4/5 3-5 days Newbie friendliness 45/100

rust-lang/libc#4367 · 7 comments · Opened Apr 3, 2025
ctest: Duplicate symbol errors for static tests Open

ctest

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-lang/libc#4365 · Opened Apr 3, 2025
Android CI jobs spurious failure Open

A-CI E-help-wanted O-android

Difficulty 4/5 3-5 days Newbie friendliness 25/100

rust-lang/libc#4297 · 2 comments · Opened Mar 4, 2025
Remove the `libc` version of `core::ffi` primitives Open

C-cleanup

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rust-lang/libc#4257 · Opened Feb 3, 2025

rust-lang/libc

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