From 757b789c3047d2659af15d1f3d6e484f7893f8b9 Mon Sep 17 00:00:00 2001
From: Noel O'Donnell <6617714+odonnellnoel@users.noreply.github.com>
Date: Fri, 26 Jul 2019 03:00:42 +0100
Subject: [PATCH] Define _WANT_SEMUN for FreeBSD to ensure `union semun` is
 defined

Build was failing on GhostBSD (FreeBSD-13.0) because `union semun` is switched off by default. Defining _WANT_SEMUN switches it on.
---
 external/db_drivers/CMakeLists.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/external/db_drivers/CMakeLists.txt b/external/db_drivers/CMakeLists.txt
index 04776c475..a9b29e0d7 100644
--- a/external/db_drivers/CMakeLists.txt
+++ b/external/db_drivers/CMakeLists.txt
@@ -34,4 +34,6 @@ set(LMDB_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR}/liblmdb" CACHE STRING "LMDB Includ
 set(LMDB_LIBRARY "lmdb" CACHE STRING "LMDB Library name")
 if(CMAKE_SYSTEM_NAME MATCHES "NetBSD")
 	set_property(TARGET lmdb APPEND_STRING PROPERTY COMPILE_FLAGS " -D_SEM_SEMUN_UNDEFINED")
+elseif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
+        set_property(TARGET lmdb APPEND_STRING PROPERTY COMPILE_FLAGS " -D_WANT_SEMUN")
 endif()