From 4c84d3a3127719cf94de58d091c32b997206d964 Mon Sep 17 00:00:00 2001
From: Ali Caglayan <alizter@gmail.com>
Date: Sat, 27 Dec 2025 18:26:31 +0000
Subject: [PATCH] ITS#10419 LMDB: add support for NetBSD

---
 libraries/liblmdb/mdb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index a6b5375c00..9c1dd91183 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -137,6 +137,11 @@ typedef SSIZE_T	ssize_t;
 # define MDB_FDATASYNC		fsync
 #endif
 
+/* NetBSD does not define union semun in sys/sem.h */
+#if defined(__NetBSD__) && !defined(_SEM_SEMUN_UNDEFINED)
+# define _SEM_SEMUN_UNDEFINED  1
+#endif
+
 #ifndef _WIN32
 #include <pthread.h>
 #include <signal.h>
-- 
2.47.3