Auto merge of rust-lang#2579 - devnexen:sd14_linux_sched_compat, r=Am…

…anieu

freebsd 14 adding linux sched api compatibility fn.

libc-test/build.rs

@@ -1770,6 +1770,8 @@ fn test_freebsd(target: &str) {
         _ => &mut cfg,
     };
 
+    // For sched linux compat fn
+    cfg.define("_WITH_CPU_SET_T", None);
     // Required for `getline`:
     cfg.define("_WITH_GETLINE", None);
     // Required for making freebsd11_stat available in the headers
@@ -2224,6 +2226,13 @@ fn test_freebsd(target: &str) {
             // https://github.com/gnzlbg/ctest/issues/68
             "lio_listio" => true,
 
+            // Those are introduced in FreeBSD 14.
+            "sched_getaffinity" | "sched_setaffinity" | "sched_getcpu"
+                if Some(14) > freebsd_ver =>
+            {
+                true
+            }
+
             _ => false,
         }
     });

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -3976,6 +3976,16 @@ extern "C" {
         cpusetp: *const cpuset_t,
     ) -> ::c_int;
 
+    // sched.h linux compatibility api
+    pub fn sched_getaffinity(pid: ::pid_t, cpusetsz: ::size_t, cpuset: *mut ::cpuset_t) -> ::c_int;
+    // FIXME: the first argument's type might not be correct, fix later if that changes.
+    pub fn sched_setaffinity(
+        pid: ::c_int,
+        cpusetsz: ::size_t,
+        cpuset: *const ::cpuset_t,
+    ) -> ::c_int;
+    pub fn sched_getcpu() -> ::c_int;
+
     pub fn pthread_mutex_consistent(mutex: *mut ::pthread_mutex_t) -> ::c_int;
 
     pub fn pthread_mutexattr_getrobust(