[all-commits] [llvm/llvm-project] b2a6da: [libc] Remove 32-bit time_t support (#200426)

[Jeff Bailey via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b2a6da6197daabfc5bda2f4b2a5880aae10fc1a9
      https://github.com/llvm/llvm-project/commit/b2a6da6197daabfc5bda2f4b2a5880aae10fc1a9
  Author: Jeff Bailey <jbailey at raspberryginger.com>
  Date:   2026-06-05 (Fri, 05 Jun 2026)

  Changed paths:
    M libc/cmake/modules/LLVMLibCCompileOptionRules.cmake
    M libc/cmake/modules/LLVMLibCFlagRules.cmake
    M libc/config/config.json
    M libc/include/llvm-libc-types/CMakeLists.txt
    M libc/include/llvm-libc-types/struct_timespec.h
    M libc/include/llvm-libc-types/suseconds_t.h
    M libc/include/llvm-libc-types/time_t.h
    R libc/include/llvm-libc-types/time_t_32.h
    M libc/src/__support/OSUtil/linux/syscall_wrappers/utimensat.h
    M libc/src/__support/threads/linux/futex_utils.h
    M libc/src/__support/threads/linux/futex_word.h
    M libc/src/__support/time/linux/clock_gettime.cpp
    M libc/src/__support/time/linux/clock_settime.cpp
    M libc/src/poll/linux/poll.cpp
    M libc/src/sched/linux/sched_rr_get_interval.cpp
    M libc/src/sys/select/linux/select.cpp
    M libc/src/sys/time/linux/getitimer.cpp
    M libc/src/sys/time/linux/setitimer.cpp
    M libc/src/sys/time/linux/utimes.cpp
    M libc/src/time/linux/nanosleep.cpp
    M libc/src/time/time_constants.h
    M libc/src/time/time_utils.cpp
    M libc/test/src/__support/time/linux/timeout_test.cpp
    M libc/test/src/sys/time/utimes_test.cpp
    M libc/test/src/time/asctime_test.cpp
    M libc/test/src/time/gmtime_r_test.cpp
    M libc/test/src/time/gmtime_test.cpp
    M libc/test/src/time/mktime_test.cpp

  Log Message:
  -----------
  [libc] Remove 32-bit time_t support (#200426)

Removed time_t_32.h and forced time_t to 64-bit (__INT64_TYPE__) on all
platforms.

Forced tv_nsec in struct timespec and tv_usec in struct timeval to
64-bit. This ensures struct timespec matches the kernel layout of struct
__kernel_timespec, allowing direct casting in syscall wrappers. Note
that under C23, tv_nsec is allowed to be any signed integer type capable
of representing [0, 999999999], making this 64-bit definition fully
compliant.

Updated syscall wrappers to prefer 64-bit time syscalls:
* clock_gettime64
* clock_settime64
* clock_nanosleep_time64
* pselect6_time64
* utimensat_time64
* futex_time64

Added static_asserts to legacy fallback paths to prevent compiling on
32-bit platforms that lack 64-bit time support.

Removed obsolete Y2038 overflow tests from mktime and other time tests.

Assisted-by: Automated tooling, human reviewed.



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