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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

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:

    RUSTFLAGS='--cfg=libc_unstable_uclibc_time64'

As a reminder, these options are under active development and may change in the future (hence the "unstable" in the name). It likely that we will harmonize everything under a single configuration option before considering them stable.

Support

  • Add support for aarch64-unknown-linux-pauthtest (#5065)
  • Add support for new QNX targets (#5241)
  • Better document breaking change policy and recommended usage (#5179)

Added

  • Android: Add POSIX_SPAWN_* constants (#5104)
  • Android: Add getpwent, setpwent, and endpwent (#5160)
  • Android: Add preadv2 and pwritev2 (#5157)
  • Android: Add seccomp_notif* structures (#5224)
  • Android: Add timer_[create, delete, getoverrun, gettime, settime] (#5108)
  • Apple: Add PROC_PIDT_SHORTBSDINFO and proc_bsdshortinfo (#5110)
  • Apple: Add SIOC* constants from sockio.h (#5263)
  • Apple: Add _IOR, _IOW, _IOWR (#5264)
  • Apple: Add bpf_program and bpf_insn (#5235)
  • Apple: Add additional kqueue constants (#5077)
  • Apple: Update vm_statistics64 with recently added fields (#5253)
  • Apple: add IN6_IFF_* and SIOCGIFAFLAG_IN6 (#5239)
  • Dragonfly: Add O_*, POSIX_FADV_*, NI*, and a few other missing constants (#5116)
  • Dragonfly: add fdatasync, dlvsym, reallocarray, qsort_r, pthread_*affinity_np, ftok, extattr_*, and dup3 (#5116)
  • Emscripten: Add in6_pktinfo (#5256)
  • FreeBSD: Add SOL_LOCAL (#5185)
  • FreeBSD: Add DLT_* constants (#5235)
  • FreeBSD: Add PROC_LOGSIGEXIT_* and PPROT_* (#4657)
  • FreeBSD: Add SO_RERROR (#5260)
  • FreeBSD: add IN6_IFF_*, in6_ifreq, and SIOCGIFAFLAG_IN6 (#5239)
  • FreeBSD: add _IO* helpers from sys/ioccom.h (#5239)
  • Glibc: Add PTHREAD_*_MUTEX_INITIALIZER_NP for riscv64 (#5094)
  • Glibc: Add new fields to struct tcp_info (#5215)
  • Linux: Add OPEN_TREE_NAMESPACE (#5145)
  • Linux: Add SECCOMP_IOCTL_* constants (#5224)
  • Linux: Add SO_DETACH_REUSEPORT_BPF (#5081)
  • Linux: Add futex_waitv (#5125)
  • Linux: Add constants for fsopen, fsconfig, fsmount, and fspick (#5145)
  • Linux: Add fields to statx present since 6.16 (#4621)
  • Linux: Add network entry API (#5049)
  • Linux: add ifaddrmsg and rtattr (#5234)
  • Linux: add sockaddr_iucv (#5041)
  • MacOS: Add ENOTCAPABLE (#4925)
  • Musl: Add renameat2 (#5113)
  • NuttX: Add F_SETFD (#5258)
  • NuttX: Add POLLRD* and POLLWR* constants (#5258)
  • NuttX: Add SO_KEEPALIVE and TCP keepalive constants (#5111)
  • NuttX: Add TCP_MAXSEG (#5258)
  • NuttX: Add eventfd and EFD_* constants (#5258)
  • NuttX: Add pipe2 (#5258)
  • NuttX: Add strerror_r (#5258)
  • NuttX: Add netinet structs and constants (#5258)
  • NuttX: Add socket structs, functions and constants (#5258)
  • QuRT: Add POSIX timer functions (#5091)
  • QuRT: Add missing pthread functions from QuRT SDK headers (#5091)
  • QuRT: Add missing unistd process and file functions (#5091)
  • QuRT: Add mqueue subsystem (message queues, select/pselect) (#5091)
  • Redox: Add *at and dirent functions (#5117)
  • Solarish: Add IP TTL and IPv6 Hop Limit consts (#5089)
  • Solarish: Add port_alert and PORT_ALERT* constants (#5203)
  • Solarish: add AI_CANONNAME (#5085)
  • aarch64: Add SYS_sendfile and SYS_fadvise64 constants (#5133)

Deprecated

  • Dragonfly: Deprecate compatibility aliases CPUCTL_RSMSR and UTX_DB_LASTLOG (#5116)

Fixed

  • breaking NetBSD: Correct ts from *const timespec to *mut timespec in _lwp_park` (#5169)
  • breaking Linux GNU: Change overflowing PTRACE_*ET_SYSCALL_USER_DISPATCH_CONFIG constants from u8 to c_uint (#4936)
  • Fix the soundness bug in the representation of extern types (#5021)
  • Cygwin: fix cpuset_t typo in CPU_ZERO (#5098)
  • Dragonfly: ABI fixes including regex offsets, ifaddrs, pthread barriers, process sizing fields, and mcontext alignment (#5116)
  • Dragonfly: Correct values of CPUCTL_CPUID*, EV_HUP, and EV_SYSFLAGS (#5116)
  • Emscripten: fix pthread type sizes for wasm64 (MEMORY64) (#5156)
  • Horizon: Fix the value of POLLOUT (#5090)
  • Linux: Correct the value of EPIOC[GS]PARAMS with nonstandard _IOC (#5188)
  • Make VxWorks shims unsafe (#3727)
  • NetBSD: Correct getmntinfo to link __getmntinfo13 (#5251)
  • QNX: Fix the value of PTHREAD_MUTEX_INITIALIZER (#5241)
  • QuRT: fix type and definition inaccuracies against SDK headers (#5091)
  • Windows: Correctly link to 32-bit time routines on 32-bit platforms (#5059)
  • uClibc: Fix constants accidentally removed (#5141)
  • uclibc: Fix build issues (#5046)
  • uclibc: Fix type of PRIO_PROCESS and friends (#5046)

Changed

  • AIX, TeeOS: Drop unneeded -> c_void (#5240)
  • Apple: Change AIO_LISTIO_MAX to account for changes in macOS 27 (#5253)
  • Glibc: Update the value of MS_NOUSER (#5215)
  • L4Re: Update definitions and test infra (#5275)
  • Linux: Update the value of SW_MAX and SW_CNT (#5215)
  • MacOS: Add swapped_count to vm_statistics64 (#4926)
  • Windows: Windows-GNU now respects libc_unstable_gnu_time_bits for 64-bit time_t config (#5062)

Removed

  • Dragonfly: Remove FreeBSD-only Elf32_Lword, ip_mreq_source, and IP_ constants (#5116)
  • Dragonfly: Remove private VM type bindings (#5116)
  • Linux: Remove KERN_REALROOTDEV and VM_LAPTOP_MODE (#5177)
  • VxWorks: Remove non-user-facing (kernel) API (#5129)

Other

  • Print config information if LIBC_BUILD_VERBOSE is set (#5272)
  • Annotate *LAST constants as potentially changing (#5120)
  • Annotate *MAX constants as potentially changing (#5122)
  • BSD: Annotate ELAST constants as potentially changing (#5118)
  • FreeBSD: Annotate RAND_MAX as potentially changing (#5119)
  • Linux, L4re: Annotate *NUM constants as potentially changing (#5123)
  • QNX: Restructure to support new platforms (#4984)
  • Unix: Annotate *COUNT constants as potentially changing (#5121)
  • uClibc: Add unstable support of 64-bit time_t (#5046)
  • (internal) FreeBSD: Replace unstable env to set version with an unstable cfg (#5201)
  • (internal) Glibc: Remove public configuration for file offset bits (#5268)
  • (internal) Linux: Delete config via RUST_LIBC_UNSTABLE_LINUX_TIME_BITS64 (#5197)
  • (internal) Replace RUST_LIBC_UNSTABLE env with libc_unstable* cfg (#4977)

0.2.186 - 2026-04-24

Added

  • Apple: Add KEVENT_FLAG_* constants (#5070)
  • Linux: Add PR_SET_MEMORY_MERGE and PR_GET_MEMORY_MERGE (#5060)

Changed

  • CI: Migrate FreeBSD CI from Cirrus CI to GitHub Actions (#5058)

0.2.185 - 2026-04-13

Added

  • EspIDF: Add espidf_picolibc cfg for picolibc O_* flag values (#5035)
  • Hexagon: add missing constants and fix types for linux-musl (#5042)
  • Redox: Add semaphore functions (#5051)
  • Windows: Add sprintf, snprintf, and the scanf family (#5024)

Fixed

  • Hexagon: Decouple time64 types from musl symbol redirects (#5040)
  • Horizon: Change POLL constants from c_short to c_int (#5045)

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)
  • OpenBSD: Add kinfo_file and related constants (#4991)
  • VxWorks: Add additional structs and defines (#5003)
  • Various: Implement Default for timeval and timespec (#4976)

Fixed

  • Hexagon musl: Enable unstable 64-bit time_t support and musl_v1_2_3 (#4992)
  • Nintendo Switch: Fix target support (#4982)
  • OpenBSD: Wrap an unused field in Padding (#4997)
  • Redox: Change sigaction.sa_flags to c_int (#4986)
  • Redox: Fix blkcnt_t type (#4994)

0.2.182 - 2026-02-13

Added

  • Android, Linux: Add tgkill (#4970)
  • Redox: Add RENAME_NOREPLACE (#4968)
  • Redox: Add renameat2 (#4968)

0.2.181 - 2026-02-09

Added

  • Apple: Add MADV_ZERO (#4924)
  • Redox: Add makedev, major, and minor (#4928)
  • GLibc: Add PTRACE_SET_SYSCALL_INFO (#4933)
  • OpenBSD: Add more kqueue related constants for (#4945)
  • Linux: add CAN error types (#4944)
  • OpenBSD: Add siginfo_t::si_status (#4946)
  • QNX NTO: Add max_align_t (#4927)
  • Illumos: Add _CS_PATH (#4956)
  • OpenBSD: add ppoll (#4957)

Fixed

  • breaking: Redox: Fix the type of dev_t (#4928)
  • AIX: Change 'tv_nsec' of 'struct timespec' to type 'c_long' (#4931)
  • AIX: Use 'struct st_timespec' in 'struct stat{,64}' (#4931)
  • Glibc: Link old version of tc{g,s}etattr (#4938)
  • Glibc: Link the correct version of cf{g,s}et{i,o}speed on mips{32,64}r6 (#4938)
  • OpenBSD: Fix constness of tm.tm_zone (#4948)
  • OpenBSD: Fix the definition of ptrace_thread_state (#4947)
  • QuRT: Fix type visibility and defs (#4932)
  • Redox: Fix values for PTHREAD_MUTEX_{NORMAL, RECURSIVE} (#4943)
  • Various: Mark additional fields as private padding (#4922)

Changed

  • Fuchsia: Update SO_* constants (#4937)
  • Revert "musl: convert inline timespecs to timespec" (resolves build issues on targets only supported by Musl 1.2.3+ ) (#4958)

0.2.180 - 2026-01-08

Added

  • QNX: Add missing BPF and ifreq structures (#4769)

Fixed

  • Linux, L4Re: address soundness issues of CMSG_NXTHDR (#4903)
  • Linux-like: Handle zero-sized payload differences in CMSG_NXTHDR (#4903)
  • Musl: Fix incorrect definitions of struct stat on some 32-bit architectures (#4914)
  • NetBSD: RISC-V 64: Correct mcontext type definitions (#4886)
  • uClibc: Re-enable __SIZEOF_PTHREAD_COND_T on non-L4Re uclibc (#4915)
  • uClibc: Restructure Linux netlink module to resolve build errors (#4915)

0.2.179 - 2025-01-03

With this release, we now have unstable support for 64-bit time_t on 32-bit platforms with both Musl and Glibc. Testing is appreciated!

For now, these can be enabled by setting environment variables during build:

RUST_LIBC_UNSTABLE_MUSL_V1_2_3=1
RUST_LIBC_UNSTABLE_GNU_TIME_BITS=64

Note that the exact configuration will change in the future. Setting the MUSL_V1_2_3 variable also enables some newer API unrelated to time_t.

Added

  • L4Re: Add uclibc aarch64 support (#4479)
  • Linux, Android: Add a generic definition for XCASE (#4847)
  • Linux-like: Add NAME_MAX (#4888)
  • Linux: Add AT_EXECVE_CHECK (#4422)
  • Linux: Add the SUN_LEN macro (#4269)
  • Linux: add getitimer and setitimer (#4890)
  • Linux: add pthread_tryjoin_n and pthread_timedjoin_np (#4887)
  • Musl: Add unstable support for 64-bit time_t on 32-bit platforms (#4463)
  • NetBSD, OpenBSD: Add interface LINK_STATE_* definitions from sys/net/if.h (#4751)
  • QuRT: Add support for Qualcomm QuRT (#4845)
  • Types: Add Padding::uninit() (#4862)

Fixed

  • Glibc: Link old version of cf{g,s}et{i,o}speed (#4882)
  • L4Re: Fixes for pthread (#4479)
  • L4re: Fix a wide variety of incorrect definitions (#4479)
  • Musl: Fix the value of CPU_SETSIZE on musl 1.2+ (#4865)
  • Musl: RISC-V: fix public padding fields in stat/stat64 (#4463)
  • Musl: s390x: Fix definition of SIGSTKSZ/MINSIGSTKSZ (#4884)
  • NetBSD: Arm: Fix PT_{GET,SET}FPREGS, _REG_TIPDR, and _REG_{LR,SP} (#4899)
  • NetBSD: Fix if_msghdr alignment (#4902)
  • NetBSD: Fix siginfo_t layout on 32-bit platforms (#4904)
  • NetBSD: change definition of pthread_spin_t to allow arch redefinition. (#4899)
  • Newlib: Fix ambiguous glob exports and other warnings for Vita and 3DS (#4875)
  • QNX: Fix build error (#4879)

Changed

  • CI: Update CI images to FreeBSD 15.0-release (#4857)
  • L4Re: Make pthread struct fields private (#4876)
  • Linux, Fuchsia: Mark mq_attr padding area as such (#4858)
  • Types: Wrap a number of private fields in the Padding type (#4862)

Removed

  • Build: Remove RUST_LIBC_UNSTABLE_LINUX_TIME_BITS64 (#4865)
  • WASI: Remove nonexistent clocks (#4880)

0.2.178 - 2025-12-01

Added

  • BSD: Add issetugid (#4744)
  • Cygwin: Add missing utmp/x.h, grp.h, and stdio.h interfaces (#4827)
  • Linux s390x musl: Add __psw_t/fprefset_t/*context_t (#4726)
  • Linux, Android: Add definition for IUCLC (#4846)
  • Linux, FreeBSD: Add AT_HWCAP{3,4} (#4734)
  • Linux: Add definitions from linux/can/bcm.h (#4683)
  • Linux: Add syscalls 451-469 for m68k (#4850)
  • Linux: PowerPC: Add 'ucontext.h' definitions (#4696)
  • NetBSD: Define eventfd (#4830)
  • Newlib: Add missing constants from unistd.h (#4811)
  • QNX NTO: Add cfmakeraw (#4704)
  • QNX NTO: Add cfsetspeed (#4704)
  • Redox: Add getresgid and getresuid (#4752)
  • Redox: Add setresgid and setresuid (#4752)
  • VxWorks: Add definitions from select.h, stat.h, poll.h, ttycom.h, utsname.h, resource.h, mman.h, udp.h, in.h, in6.h, if.h, fnmatch.h, and sioLibCommon.h (#4781)
  • VxWorks: Add missing defines/functions needed by rust stdlib (#4779)
  • WASI: Add more definitions for libstd (#4747)

Deprecated

  • Apple: Deprecate TIOCREMOTE (#4764)

Fixed

Note that there were a large number of fixes on NetBSD for this libc release, some of which include minor breakage.

  • AIX: Change errno EWOULDBLOCK to make it an alias of EAGAIN (#4790)
  • AIX: Resolve function comparison and unnecessary_transmutes warnings (#4780)
  • Apple: Correct the value of SF_SETTABLE (#4764)
  • DragonflyBSD: Fix the type of mcontext_t.mc_fpregs (#)
  • EspIDF: Fix the duplicate definition of gethostname (#4773)
  • L4Re: Update available pthread API (#4836)
  • Linux: Correct the value of NFT_MSG_MAX (#4761)
  • Linux: Remove incorrect repr(align(8)) for canxl_frame (#4760)
  • Make eventfd argument names match OS docs/headers (#4830)
  • NetBSD: Account for upstream changes to ptrace with LWP (#4782)
  • NetBSD: Correct ipc_perm, split from OpenBSD as ipc.rs (#4782)
  • NetBSD: Correct a number of symbol link names (#4782)
  • NetBSD: Correct the type of kinfo_vmentry.kve_path (#)
  • NetBSD: Fix uucred.cr_ngroups from int to short (#4782)
  • NetBSD: Fix the type of kevent.udata (#4782)
  • NetBSD: Fix the type of mcontext_t.__fpregs (#4782)
  • NetBSD: Fix the value of PT_SUSPEND (#4782)
  • NetBSD: Fix the values of FNM_* constants (#4782)
  • NetBSD: Increase the size of sockaddr_dl.sdl_data from 12 to 24 (#4782)
  • NetBSD: Introduce if_.rs, fix the definition of ifreq (#4782)
  • NetBSD: Introduce time.rs, fix the values of CLOCK_*_CPUTIME_ID (#4782)
  • NetBSD: Introduce timex.rs (#4782)
  • NetBSD: Introduce types.rs, correct the definition of lwpid_t (#4782)
  • NetBSD: Introduce utmp_.rs, correct the definition of lastlog (#4782)
  • NetBSD: Introduce utmpx_.rs, correct utmpx definitions (#4782)
  • NetBSD: Make _cpuset an extern type (#4782)
  • NetBSD: RISC-V 64: Fix the mcontext types (#4782)
  • Nuttx: Resolve warnings (#4773)
  • OHOS: Don't emit duplicate lfs64 definitions (#4804)
  • Redox: Fix the type of pid_t (#4825)
  • WASI: Gate __wasilibc_register_preopened_fd (#4837)
  • Wali: Fix unknown config (#4773)

Changed

  • AIX: Declare field 'tv_nsec' of structure 'timespec' as 'i32' in both 32-bit and 64-bit modes (#4750)
  • DragonFly: Avoid usage of thread_local (#3653)
  • Linux: Update the definition for ucontext_t and unskip its tests (#4760)
  • MinGW: Set L_tmpnam and TMP_MAX to the UCRT value (#4566)
  • WASI: More closely align pthread type reprs (#4747)
  • Simplify rustc-check-cfg emission in build.rs (#4724)
  • Transition a number of definitions to the new source structure (internal change)

Removed

  • MIPS Musl: Remove rogue definition of SIGSTKFLT (#4749)
  • NetBSD: Make statvfs.f_spare non-public (#4782)
  • NetBSD: Remove BPF constants (#4782)
  • NetBSD: Remove *_MAXID constants and AT_SUN_LDPGSIZE (#4782)
  • NetBSD: Remove IFF_NOTRAILERS (#4782)
  • NetBSD: Remove vm_size_t (#4782)
  • NetBSD: Replace REG_ENOSYS with REG_ILLSEQ (#4782)

0.2.177 - 2025-10-09

Added

  • Apple: Add TIOCGETA, TIOCSETA, TIOCSETAW, TIOCSETAF constants (#4736)
  • Apple: Add pthread_cond_timedwait_relative_np (#4719)
  • BSDs: Add _CS_PATH constant (#4738)
  • Linux-like: Add SIGEMT for mips* and sparc* architectures (#4730)
  • OpenBSD: Add elf_aux_info (#4729)
  • Redox: Add more sysconf constants (#4728)
  • Windows: Add wcsnlen (#4721)

Changed

  • WASIP2: Invert conditional to include p2 APIs (#4733)

0.2.176 - 2025-09-23

Support

  • The default FreeBSD version has been raised from 11 to 12. This matches rustc since 1.78. (#2406)
  • Debug is now always implemented, rather than being gated behind the extra_traits feature. (#4624)

Added

  • AIX: Restore some non-POSIX functions guarded by the _KERNEL macro. (#4607)
  • FreeBSD 14: Add st_fileref to struct stat (#4642)
  • Haiku: Add the accept4 POSIX call (#4586)
  • Introduce a wrapper for representing padding (#4632)
  • Linux: Add EM_RISCV (#4659)
  • Linux: Add MS_NOSYMFOLLOW (#4389)
  • Linux: Add backtrace_symbols(_fd) (#4668)
  • Linux: Add missing SOL_PACKET optnames (#4669)
  • Musl s390x: Add SYS_mseal (#4549)
  • NuttX: Add __errno (#4687)
  • Redox: Add dirfd, VDISABLE, and resource consts (#4660)
  • Redox: Add more resource.h, fcntl.h constants (#4666)
  • Redox: Enable strftime and mkostemp[s] (#4629)
  • Unix, Windows: Add qsort_r (Unix), and qsort(_s) (Windows) (#4677)
  • Unix: Add dlvsym for Linux-gnu, FreeBSD, and NetBSD (#4671)
  • Unix: Add sigqueue (#4620)

Changed

  • FreeBSD 15: Mark kinfo_proc as non-exhaustive (#4553)
  • FreeBSD: Set the ELF symbol version for readdir_r (#4694)
  • Linux: Correct the config for whether or not epoll_event is packed (#4639)
  • Tests: Replace the old ctest with the much more reliable new implementation (#4655 and many related PRs)

Fixed

  • AIX: Fix the type of the 4th arguement of getgrnam_r ([#4656](https://github.com/rust-lang/libc/pull/4656
  • FreeBSD: Limit P_IDLEPROC to FreeBSD 15 (#4640)
  • FreeBSD: Limit mcontext_t::mc_tlsbase to FreeBSD 15 (#4640)
  • FreeBSD: Update gating of mcontext_t.mc_tlsbase (#4703)
  • Musl s390x: Correct the definition of statfs[64] (#4549)
  • Musl s390x: Make fpreg_t a union (#4549)
  • Redox: Fix the types of gid_t and uid_t (#4689)
  • Redox: Fix the value of MAP_FIXED (#4684)

Deprecated

  • Apple: Correct the deprecated attribute for iconv (a97a0b53)
  • FreeBSD: Deprecate TIOCMGDTRWAIT and TIOCMSDTRWAIT (#4685)

Removed

  • FreeBSD: Remove JAIL_{GET,SET}_MASK, _MC_FLAG_MASK (#4691)

0.2.175 - 2025-08-10

Added

  • AIX: Add getpeereid (#4524)
  • AIX: Add struct ld_info and friends (#4578)
  • AIX: Retore struct winsize (#4577)
  • Android: Add UDP socket option constants (#4619)
  • Android: Add CLONE_CLEAR_SIGHAND and CLONE_INTO_CGROUP (#4502)
  • Android: Add more prctl constants (#4531)
  • FreeBSD Add further TCP stack-related constants (#4196)
  • FreeBSD x86-64: Add mcontext_t.mc_tlsbase (#4503)
  • FreeBSD15: Add kinfo_proc.ki_uerrmsg (#4552)
  • FreeBSD: Add in_conninfo (#4482)
  • FreeBSD: Add xinpgen and related types (#4482)
  • FreeBSD: Add xktls_session (#4482)
  • Haiku: Add functionality from libbsd (#4221)
  • Linux: Add SECBIT_* (#4480)
  • NetBSD, OpenBSD: Export ioctl request generator macros (#4460)
  • NetBSD: Add ptsname_r (#4608)
  • RISCV32: Add time-related syscalls (#4612)
  • Solarish: Add strftime* (#4453)
  • linux: Add EXEC_RESTRICT_* and EXEC_DENY_* (#4545)

Changed

  • AIX: Add const to signatures to be consistent with other platforms (#4563)

Fixed

  • AIX: Fix the type of struct statvfs.f_fsid (#4576)
  • AIX: Fix the type of constants for the ioctl request argument (#4582)
  • AIX: Fix the types of stat{,64}.st_*tim (#4597)
  • AIX: Use unique errno values (#4507)
  • Build: Fix an incorrect target_os -> target_arch check (#4550)
  • FreeBSD: Fix the type of xktls_session_onedir.ifnet (#4552)
  • Mips64 musl: Fix the type of nlink_t (#4509)
  • Mips64 musl: Use a special MIPS definition of stack_t (#4528)
  • Mips64: Fix SI_TIMER, SI_MESGQ and SI_ASYNCIO definitions (#4529)
  • Musl Mips64: Swap the order of si_errno and si_code in siginfo_t (#4530)
  • Musl Mips64: Use a special MIPS definition of statfs (#4527)
  • Musl: Fix the definition of fanotify_event_metadata (#4510)
  • NetBSD: Correct enum fae_action to be #[repr(C)] (#60a8cfd5)
  • PSP: Correct char -> c_char (eaab4fc3)
  • PowerPC musl: Fix termios definitions (#4518)
  • PowerPC musl: Fix the definition of EDEADLK (#4517)
  • PowerPC musl: Fix the definition of NCCS (#4513)
  • PowerPC musl: Fix the definitions of MAP_LOCKED and MAP_NORESERVE (#4516)
  • PowerPC64 musl: Fix the definition of shmid_ds (#4519)

Deprecated

  • Linux: MAP_32BIT is only defined on x86 on non-x86 architectures (#4511)

Removed

  • AIX: Remove duplicate constant definitions FIND and ENTER (#4588)
  • s390x musl: Remove O_FSYNC (#4515)
  • s390x musl: Remove RTLD_DEEPBIND (#4515)

0.2.174 - 2025-06-17

Added

  • Linux: Make pidfd_info fields pub (#4487)

Fixed

  • Gnu x32: Add missing timespec.tv_nsec (#4497)
  • NuttX: Use nlink_t type for st_nlink in struct stat definition (#4483)

Other

  • Allow new unpredictable_function_pointer_comparisons lints (#4489)
  • OpenBSD: Fix some clippy warnings to use pointer::cast. (#4490)
  • Remove unessecary semicolons from definitions of CMSG_NXTHDR. (#4492)

0.2.173 - 2025-06-09

Added

  • AIX: Add an AIX triple to Cargo.toml for doc (#4475)
  • FreeBSD: Add the SO_SPLICE socket option support for FreeBSD >= 14.2 (#4451)
  • Linux GNU: Prepare for supporting _TIME_BITS=64 (#4433)
  • Linux: Add constant PACKET_IGNORE_OUTGOING (#4319)
  • Linux: Add constants and types for nsfs ioctls (#4436)
  • Linux: Add constants for Memory-Deny-Write-Execute prctls (#4400)
  • Linux: Add constants from linux/cn_proc.h and linux/connector.h (#4434)
  • Linux: Add new flags for pwritev2 and preadv2 (#4452)
  • Linux: Add pid_type enum values (#4403)
  • Linux: Update pidfd constants and types (Linux 6.9-6.15) (#4402)
  • Loongarch64 musl: Define the MADV_SOFT_OFFLINE constant (#4448)
  • Musl: Add new fields since 1.2.0/1.2.2 to struct tcp_info (#4443)
  • Musl: Prepare for supporting v1.2.3 (#4443)
  • NuttX: Add arc4random and arc4random_buf (#4464)
  • RISC-V Musl: Add MADV_SOFT_OFFLINE definition (#4447)
  • Redox: Define SCM_RIGHTS (#4440)
  • VxWorks: Add missing UTIME defines and TASK_RENAME_LENGTH (#4407)
  • Windows: Add more time.h functions (#4427)

Changed

  • Redox: Update SA_ constants. (#4426)
  • Redox: make CMSG_ALIGN, CMSG_LEN, and CMSG_SPACE const functions (#4441)

Fixed

  • AIX: Enable libc-test and fix definitions/declarations. (#4450)
  • Emscripten: Fix querying emcc on windows (use emcc.bat) (#4248)
  • Hurd: Fix build from missing fpos_t (#4472)
  • Loongarch64 Musl: Fix the struct ipc_perm bindings (#4384)
  • Musl: Fix the O_LARGEFILE constant value. (#4443)

0.2.172 - 2025-04-14

Added

  • Android: Add getauxval for 32-bit targets (#4338)
  • Android: Add if_tun.h ioctls (#4379)
  • Android: Define SO_BINDTOIFINDEX (#4391)
  • Cygwin: Add posix_spawn_file_actions_add[f]chdir[_np] (#4387)
  • Cygwin: Add new socket options (#4350)
  • Cygwin: Add statfs & fcntl (#4321)
  • FreeBSD: Add filedesc and fdescenttbl (#4327)
  • Glibc: Add unstable support for _FILE_OFFSET_BITS=64 (#4345)
  • Hermit: Add AF_UNSPEC (#4344)
  • Hermit: Add AF_VSOCK (#4344)
  • Illumos, NetBSD: Add timerfd APIs (#4333)
  • Linux: Add _IO, _IOW, _IOR, _IOWR to the exported API (#4325)
  • Linux: Add tcp_info to uClibc bindings (#4347)
  • Linux: Add further BPF program flags (#4356)
  • Linux: Add missing INPUT_PROP_XXX flags from input-event-codes.h (#4326)
  • Linux: Add missing TLS bindings (#4296)
  • Linux: Add more constants from seccomp.h (#4330)
  • Linux: Add more glibc ptrace_sud_config and related PTRACE_*ET_SYSCALL_USER_DISPATCH_CONFIG. (#4386)
  • Linux: Add new netlink flags (#4288)
  • Linux: Define ioctl codes on more architectures (#4382)
  • Linux: Add missing pthread_attr_setstack (#4349)
  • Musl: Add missing utmpx API (#4332)
  • Musl: Enable getrandom on all platforms (#4346)
  • NuttX: Add more signal constants (#4353)
  • QNX: Add QNX 7.1-iosock and 8.0 to list of additional cfgs (#4169)
  • QNX: Add support for alternative Neutrino network stack io-sock (#4169)
  • Redox: Add more sys/socket.h and sys/uio.h definitions (#4388)
  • Solaris: Temporarily define O_DIRECT and SIGINFO (#4348)
  • Solarish: Add secure_getenv (#4342)
  • VxWorks: Add missing d_type member to dirent (#4352)
  • VxWorks: Add missing signal-related constsants (#4352)
  • VxWorks: Add more error codes (#4337)

Deprecated

  • FreeBSD: Deprecate TCP_PCAP_OUT and TCP_PCAP_IN (#4381)

Fixed

  • Cygwin: Fix member types of statfs (#4324)
  • Cygwin: Fix tests (#4357)
  • Hermit: Make AF_INET = 3 (#4344)
  • Musl: Fix the syscall table on RISC-V-32 (#4335)
  • Musl: Fix the value of SA_ONSTACK on RISC-V-32 (#4335)
  • VxWorks: Fix a typo in the waitpid parameter name (#4334)

Removed

  • Musl: Remove O_FSYNC on RISC-V-32 (use O_SYNC instead) (#4335)
  • Musl: Remove RTLD_DEEPBIND on RISC-V-32 (#4335)

Other

  • CI: Add matrix env variables to the environment (#4345)
  • CI: Always deny warnings (#4363)
  • CI: Always upload successfully created artifacts (#4345)
  • CI: Install musl from source for loongarch64 (#4320)
  • CI: Revert "Also skip MFD_EXEC and MFD_NOEXEC_SEAL on sparc64" (#)
  • CI: Use $PWD instead of $(pwd) in run-docker (#4345)
  • Solarish: Restrict openpty and forkpty polyfills to Illumos, replace Solaris implementation with bindings (#4329)
  • Testing: Ensure the makedev test does not emit unused errors (#4363)

0.2.171 - 2025-03-11

Added

  • Android: Add if_nameindex/if_freenameindex support (#4247)
  • Apple: Add missing proc types and constants (#4310)
  • BSD: Add devname (#4285)
  • Cygwin: Add PTY and group API (#4309)
  • Cygwin: Add support (#4279)
  • FreeBSD: Make spawn.h interfaces available on all FreeBSD-like systems (#4294)
  • Linux: Add AF_XDP structs for all Linux environments (#4163)
  • Linux: Add SysV semaphore constants (#4286)
  • Linux: Add F_SEAL_EXEC (#4316)
  • Linux: Add SO_PREFER_BUSY_POLL and SO_BUSY_POLL_BUDGET (#3917)
  • Linux: Add devmem structs (#4299)
  • Linux: Add socket constants up to SO_DEVMEM_DONTNEED (#4299)
  • NetBSD, OpenBSD, DragonflyBSD: Add closefrom (#4290)
  • NuttX: Add pw_passwd field to passwd (#4222)
  • Solarish: define IP_BOUND_IF and IPV6_BOUND_IF (#4287)
  • Wali: Add bindings for wasm32-wali-linux-musl target (#4244)

Changed

  • AIX: Use sa_sigaction instead of a union (#4250)
  • Make msqid_ds.__msg_cbytes public (#4301)
  • Unix: Make all major, minor, makedev into const fn (#4208)

Deprecated

  • Linux: Deprecate obsolete packet filter interfaces (#4267)

Fixed

  • Cygwin: Fix strerror_r (#4308)
  • Cygwin: Fix usage of f! (#4308)
  • Hermit: Make stat::st_size signed (#4298)
  • Linux: Correct values for SI_TIMER, SI_MESGQ, SI_ASYNCIO (#4292)
  • NuttX: Update tm_zone and d_name fields to use c_char type (#4222)
  • Xous: Include the prelude to define c_int (#4304)

Other

  • Add labels to FIXMEs (#4231, #4232, #4234, #4235, #4236)
  • CI: Fix "cannot find libc" error on Sparc64 (#4317)
  • CI: Fix "cannot find libc" error on s390x (#4317)
  • CI: Pass --no-self-update to rustup update (#4306)
  • CI: Remove tests for the i586-pc-windows-msvc target (#4311)
  • CI: Remove the check_cfg job (#4322)
  • Change the range syntax that is giving ctest problems (#4311)
  • Linux: Split out the stat struct for gnu/b32/mips (#4276)

Removed

  • NuttX: Remove pthread_set_name_np (#4251)

0.2.170 - 2025-02-23

Added

Deprecated

Changed

Fixed

Other

0.2.169 - 2024-12-18

Added

Fixed

Breaking: rust-lang/rust#132975 corrected the signedness of core::ffi::c_char on various Tier 2 and Tier 3 platforms (mostly Arm and RISC-V) to match Clang. This release contains the corresponding changes to libc, including the following specific pull requests:

Cleanup

0.2.168 - 2024-12-09

Added

Deprecated

  • FreeBSD: Deprecate the CAP_UNUSED* and CAP_ALL* constants (#4183)

Fixed

  • Make the Debug implementation for unions opaque (#4176)

Other

0.2.167 - 2024-11-28

Added

Fixed

Cleanup

Other

Removed

  • Remove one unused import after the edition 2021 bump

0.2.166 - 2024-11-26

Fixed

This release resolves two cases of unintentional breakage from the previous release:

  • Revert removal of array size hacks #4150
  • Ensure const extern functions are always enabled #4151

0.2.165 - 2024-11-25

Added

Fixed

Deprecated

Cleanup

Other

0.2.164 - 2024-11-16

MSRV

This release increases the MSRV of libc to 1.63.

Other

0.2.163 - 2024-11-16

Added

Changed

Other

0.2.162 - 2024-11-07

Added

Fixed

Other

0.2.161 - 2024-10-17

Fixed

0.2.160 - 2024-10-17

Added

Changed

Fixed

Other

0.2.159 - 2024-09-24

Added

Fixed

Changed

0.2.158 - 2024-08-19

Other

0.2.157 - 2024-08-17

Added

Fixed

Changed

0.2.156 - 2024-08-15

Added

Fixed

Changed

Removed

Other

  • Update or remove CI tests that have been failing
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