`pthread_condattr_setclock`function missing for l4re target

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
55/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Active
Tech stack
rust
Domain
operating-systems

Research direction

Start by locating the pthread_condattr_setclock declarations in libc and comparing their platform and target cfgs with the l4re targets. The report reproduces a missing binding while building parking_lot_core with -Zbuild-std; verify the affected l4re targets and add coverage for the missing declaration. Done when those builds can resolve the function.

Written by the indexing model from the issue text.

Description

C-API-request

rustc 1.101.0-nightly (080cc2714 2026-10-11)
build with -Zbuild-std
for all l4re targets

error[: cannot find function `pthread_condattr_setclock` in crate `libc`
     ╭▸ /cargo/registry/25cdd57fae9f0462/parking_lot_core-0.9.12/src/thread_parker/unix.rs:141:23
     │
 141 │         let r = libc::pthread_condattr_setclock(attr.as_mut_ptr(), libc::CLOCK_MONOTONIC);
     │                       ━━━━━━━━━━━━━━━━━━━━━━━━━ not found in `libc`
     ╰╴
note: similarly named function `pthread_condattr_destroy` defined here
     ╭▸ /cargo/registry/25cdd57fae9f0462/libc-0.2.190/src/unix/mod.rs:1452:5
     │
1452 │     pub fn pthread_condattr_destroy(attr: *mut crate::pthread_condattr_t) -> c_int;
     ╰╴    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
help: a function with a similar name exists
     ╭╴
 141 -         let r = libc::pthread_condattr_setclock(attr.as_mut_ptr(), libc::CLOCK_MONOTONIC);
 141 +         let r = libc::pthread_condattr_destroy(attr.as_mut_ptr(), libc::CLOCK_MONOTONIC);
     ╰╴

For more information about this error, try `rustc --explain E0425`.
error: could not compile `parking_lot_core` (lib) due to 1 previous error
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