Sourced from libc's releases.

0.2.184

MSRV

This release increases the MSRV of libc to 1.65. With this update, you can now always use the core::ffi::c_* types with libc definitions, since libc has been changed to reexport from core rather than redefining them. (This usually worked before but had edge cases.) (#4972)

Added

• BSD: Add IP_MINTTL to bsd (#5026)
• Cygwin: Add TIOCM_DSR (#5031)
• FreeBSD: Added xfile structe and file descriptor types (#5002)
• Linux: Add CAN netlink bindings (#5011)
• Linux: Add struct ethhdr (#4239)
• Linux: Add struct ifinfomsg (#5012)
• Linux: Define max_align_t for riscv64 (#5029)
• NetBSD: Add missing CLOCK_ constants (#5020)
• NuttX: Add _SC_HOST_NAME_MAX (#5004)
• VxWorks: Add flock and F_*LCK constants (#4043)
• WASI: Add all _SC_* sysconf constants (#5023)

Deprecated

The remaining fixed-width integer aliases, __uint128_t, __uint128, __int128_t, and __int128, have been deprecated. Use i128 and u128 instead. (#4343)

Fixed

• breaking Redox: Fix signal action constant types (#5009)
• EspIDF: Correct the value of DT_* constants (#5034)
• Redox: Fix locale values and add RTLD_NOLOAD, some TCP constants (#5025)
• Various: Use Padding::new(<zeroed>) rather than Padding::uninit() (#5036)

Changed

• potentially breaking Linux: Add new fields to struct ptrace_syscall_info (#4966)
• Re-export core::ffi integer types rather than redefining (#5015)
• Redox: Update F_DUPFD, IP, and TCP constants to match relibc (#4990)

0.2.183

Added

• ESP-IDF: Add SOMAXCONN (#4993)
• Linux: Add name_to_handle_at and open_by_handle_at (#4988)
• NetBSD: Add kinfo_file, kinfo_pcb, and related constants (#4985)
• OpenBSD: Add kinfo_file and related constants (#4991)
• VxWorks: Add additional structs and defines (#5003)
• Various: Implement Default for timeval and timespec (#4976)

... (truncated)

Sourced from libc's changelog.

0.2.184 - 2026-04-01

MSRV

This release increases the MSRV of libc to 1.65. With this update, you can now always use the core::ffi::c_* types with libc definitions, since libc has been changed to reexport from core rather than redefining them. (This usually worked before but had edge cases.) (#4972)

Added

• BSD: Add IP_MINTTL to bsd (#5026)
• Cygwin: Add TIOCM_DSR (#5031)
• FreeBSD: Added xfile structe and file descriptor types (#5002)
• Linux: Add CAN netlink bindings (#5011)
• Linux: Add struct ethhdr (#4239)
• Linux: Add struct ifinfomsg (#5012)
• Linux: Define max_align_t for riscv64 (#5029)
• NetBSD: Add missing CLOCK_ constants (#5020)
• NuttX: Add _SC_HOST_NAME_MAX (#5004)
• VxWorks: Add flock and F_*LCK constants (#4043)
• WASI: Add all _SC_* sysconf constants (#5023)

Deprecated

The remaining fixed-width integer aliases, __uint128_t, __uint128, __int128_t, and __int128, have been deprecated. Use i128 and u128 instead. (#4343)

Fixed

• breaking Redox: Fix signal action constant types (#5009)
• EspIDF: Correct the value of DT_* constants (#5034)
• Redox: Fix locale values and add RTLD_NOLOAD, some TCP constants (#5025)
• Various: Use Padding::new(<zeroed>) rather than Padding::uninit() (#5036)

Changed

• potentially breaking Linux: Add new fields to struct ptrace_syscall_info (#4966)
• Re-export core::ffi integer types rather than redefining (#5015)
• Redox: Update F_DUPFD, IP, and TCP constants to match relibc (#4990)

0.2.183 - 2026-03-08

Added

• ESP-IDF: Add SOMAXCONN (#4993)
• Linux: Add name_to_handle_at and open_by_handle_at (#4988)
• NetBSD: Add kinfo_file, kinfo_pcb, and related constants (#4985)

... (truncated)

• b1fd610 chore: Release libc 0.2.184
• f596819 ci: Don't enforce cargo-semver-checks
• 4645f60 linux: update ptrace_syscall_info struct
• 14cbbec types: Remove Padding::uninit
• b5dcda8 pthread: Use Padding::new(\<zeroed>) rather than Padding::uninit()
• bbb1c5d types: Add a new function to Padding
• df06e43 Fix locale values and add RTLD_NOLOAD, some TCP constants
• 078f5c6 newlib/espidf: Move DT_* to espidf/mod.rs
• d32b83d Add IP_MINTTL to bsd
• 939e0ec Define max_align_t for riscv64-linux
• Additional commits viewable in compare view

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