From fe65c122d26f7cb7493bca3a9093eefe5a66717b Mon Sep 17 00:00:00 2001
From: Leonid Yuriev <leo@yuriev.ru>
Date: Tue, 6 Oct 2020 00:28:12 +0300
Subject: [PATCH] mdbx: fix `pthread_yield()` for non-GLIBC.

Change-Id: I080e37a42b62e524896dea8747e9f23e2fcd584f
---
 src/core.c | 4 +++-
 src/osal.h | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/core.c b/src/core.c
index a9ba1ee8..ae2b8e0d 100644
--- a/src/core.c
+++ b/src/core.c
@@ -777,7 +777,9 @@ static __always_inline void atomic_yield(void) {
     defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) ||            \
     defined(__MWERKS__) || defined(__sgi)
   __asm__ __volatile__(".word 0x00000140");
-#else
+#elif defined(__linux__) || defined(__gnu_linux__) || defined(_UNIX03_SOURCE)
+  sched_yield();
+#elif (defined(_GNU_SOURCE) && __GLIBC_PREREQ(2, 1)) || defined(_OPEN_THREADS)
   pthread_yield();
 #endif
 }
diff --git a/src/osal.h b/src/osal.h
index 3509942d..3af23ce0 100644
--- a/src/osal.h
+++ b/src/osal.h
@@ -119,6 +119,7 @@
 
 #if defined(__linux__) || defined(__gnu_linux__)
 #include <linux/sysctl.h>
+#include <sched.h>
 #include <sys/sendfile.h>
 #include <sys/statfs.h>
 #endif /* Linux */