From f9d3abf5d041f574304d2e585c5cf51448a77063 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Mon, 22 Apr 2019 00:13:41 +0200
Subject: [PATCH] LibC: Add sched_yield(), needed for GCC 8.3.0 build.

---
 LibC/Makefile  |  3 ++-
 LibC/sched.cpp | 14 ++++++++++++++
 LibC/sched.h   |  9 +++++++++
 3 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 LibC/sched.cpp
 create mode 100644 LibC/sched.h

diff --git a/LibC/Makefile b/LibC/Makefile
index fbb3de5346..9c690d3f39 100644
--- a/LibC/Makefile
+++ b/LibC/Makefile
@@ -43,7 +43,8 @@ LIBC_OBJS = \
        poll.o \
        locale.o \
        arpa/inet.o \
-       netdb.o
+       netdb.o \
+       sched.o
 
 ASM_OBJS = setjmp.no crti.ao crtn.ao
 
diff --git a/LibC/sched.cpp b/LibC/sched.cpp
new file mode 100644
index 0000000000..ce48add522
--- /dev/null
+++ b/LibC/sched.cpp
@@ -0,0 +1,14 @@
+#include <sched.h>
+#include <errno.h>
+#include <Kernel/Syscall.h>
+
+extern "C" {
+
+int sched_yield()
+{
+    int rc = syscall(SC_yield);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+}
+
diff --git a/LibC/sched.h b/LibC/sched.h
new file mode 100644
index 0000000000..5c472a27b7
--- /dev/null
+++ b/LibC/sched.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+int sched_yield();
+
+__END_DECLS