From 066bb696e3659719b89dda143aae6528051ec081 Mon Sep 17 00:00:00 2001
From: Leonid Yuriev <leo@yuriev.ru>
Date: Wed, 5 Jan 2022 15:24:29 +0300
Subject: [PATCH] mdbx: avoid including `sys/sem.h` when `MDBX_LOCKING !=
 MDBX_LOCKING_SYSV`.

Fixes https://github.com/erthink/libmdbx/issues/258.
---
 src/lck-posix.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lck-posix.c b/src/lck-posix.c
index 346b62dc..285a9e67 100644
--- a/src/lck-posix.c
+++ b/src/lck-posix.c
@@ -15,7 +15,10 @@
 #if !(defined(_WIN32) || defined(_WIN64)) /* !Windows LCK-implementation */
 
 #include "internals.h"
+
+#if MDBX_LOCKING == MDBX_LOCKING_SYSV
 #include <sys/sem.h>
+#endif /* MDBX_LOCKING == MDBX_LOCKING_SYSV */
 
 /*----------------------------------------------------------------------------*/
 /* global constructor/destructor */