[compiler-rt] [libc] [libc][sched] Implement proxy headers for `cpu_set_t`, `struct sched_param` and `sched_macros`. (PR #126303)

[Krishna Pandey via llvm-commits]

================
@@ -0,0 +1,27 @@
+//===-- Definition of macros from sched.h ---------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_HDR_SCHED_MACROS_H
+#define LLVM_LIBC_HDR_SCHED_MACROS_H
+
+#ifdef LIBC_FULL_BUILD
+
+#ifndef _SCHED_H
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krishna2803 wrote:

Oh, I missed it. we do have a definition for `CPU_COUNT` here:

https://github.com/llvm/llvm-project/blob/3f67c42904757958fe9b30db1e37429ef1c0dfde/libc/include/llvm-libc-macros/linux/sched-macros.h#L26-L27

and 

that would mean we do have a _complete enough_ `sched.h` implementation so the bug shouldn't be because of some missing implementation (at least for now) which then means that the bug is due to the order of includes only?

https://github.com/llvm/llvm-project/pull/126303