Bump libc from 0.2.186 to 0.2.189

[dependabot]

Bumps libc from 0.2.186 to 0.2.189.

Release notes

Sourced from libc's releases.

0.2.189

Added

• Emscripten: Add pthread_sigmask, sigwait, sigwaitinfo, sigtimedwait, faccessat, and pthread_kill (#5270)
• Linux SPARC: Enable the clone3 syscall (#4980)
• Solarish: Add CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID (#5274)

Deprecated

• Deprecate CLONE_INTO_CGROUP and CLONE_CLEAR_SIGHAND. These overflow their types and will be changed to a larger size in the future. (8c6e6710458d)

Fixed

• Musl riscv32: Rename padding fields to avoid a conflict and fix the build (2499ff0ad993)
• NuttX: Fix wchar_t definition under Arm (#5245)
• Windows: Add back link names for time-related symbols (#5300)

0.2.188

Changed

• Restore Send and Sync for DIR (35b062263401)

These were removed in 0.2.187 because libc does not actually make Send and Sync guarantees about DIR (or other extern types), but this caused some crates to break. The traits are added back for now to allow time to migrate, but will be removed again in the future; please make sure your crates are not relying on libc::DIR: Send or libc::DIR: Sync.

0.2.187

This release contains a number of improvements related to 64-bit time_t configuration. Of note the existing RUST_LIBC_UNSTABLE_* environment variables have been replaced with configuration options. The new way to use these is:

RUSTFLAGS='--cfg=libc_unstable_musl_v1_2_3' cargo ...
RUSTFLAGS='--cfg=libc_unstable_gnu_time_bits="64"' cargo ...

Being able to set this via RUSTFLAGS makes it easier to only apply configuration to specific targets (and notably, not the host if build scripts are used).

There are two other notable changes:

• The 32-bit windows-gnu targets now respect libc_unstable_gnu_time_bits

• uClibc now supports a similar configuration option:

  RUSTFLAGS='--cfg=libc_unstable_uclibc_time64'

... (truncated)

Changelog

Sourced from libc's changelog.

0.2.189 - 2026-07-21

Added

• Emscripten: Add pthread_sigmask, sigwait, sigwaitinfo, sigtimedwait, faccessat, and pthread_kill (#5270)
• Linux SPARC: Enable the clone3 syscall (#4980)
• Solarish: Add CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID (#5274)

Deprecated

• Deprecate CLONE_INTO_CGROUP and CLONE_CLEAR_SIGHAND. These overflow their types and will be changed to a larger size in the future. (8c6e6710458d)

Fixed

• Musl riscv32: Rename padding fields to avoid a conflict and fix the build (2499ff0ad993)
• NuttX: Fix wchar_t definition under Arm (#5245)
• Windows: Add back link names for time-related symbols (#5300)

0.2.188 - 2026-07-21

Changed

• Restore Send and Sync for DIR (35b062263401)

These were removed in 0.2.187 because libc does not actually make Send and Sync guarantees about DIR (or other extern types), but this caused some crates to break. The traits are added back for now to allow time to migrate, but will be removed again in the future; please make sure your crates are not relying on libc::DIR: Send or libc::DIR: Sync.

0.2.187 - 2026-07-20

This release contains a number of improvements related to 64-bit time_t configuration. Of note the existing RUST_LIBC_UNSTABLE_* environment variables have been replaced with configuration options. The new way to use these is:

RUSTFLAGS='--cfg=libc_unstable_musl_v1_2_3' cargo ...
RUSTFLAGS='--cfg=libc_unstable_gnu_time_bits="64"' cargo ...

Being able to set this via RUSTFLAGS makes it easier to only apply configuration to specific targets (and notably, not the host if build scripts are used).

There are two other notable changes:

• The 32-bit windows-gnu targets now respect libc_unstable_gnu_time_bits
• uClibc now supports a similar configuration option:

... (truncated)

Commits

• ef0906e libc: Release 0.2.189
• 5a79f76 riscv32-musl: Rename padding fields to avoid a conflict
• 3e51062 psp: Fix overflowing_literals warnings
• e352fdd emscripten: add pthread_sigmask, sigwait, sigwaitinfo, sigtimedwait, faccessa...
• 63221b3 macros: Require safe in safe_f! invocations
• 707ab52 macros: Require unsafe in f! invocations
• 8e40c94 Enable clone3() syscall on sparc-linux and sparc64-linux
• 8427909 windows: Add back link names for time-related symbols
• b4863fa nuttx: fix wchar_t definition under arm
• 41c683d nuttx: mirror type definitions
• Additional commits viewable in compare view

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