$NetBSD: patch-src_SFML_System_CMakeLists.txt,v 1.1 2020/05/21 08:42:00 plunky Exp $

add NetBSD support

--- src/SFML/System/CMakeLists.txt.orig	2018-10-15 19:41:39.000000000 +0000
+++ src/SFML/System/CMakeLists.txt
@@ -90,7 +90,7 @@ sfml_add_library(sfml-system
                  SOURCES ${SRC} ${PLATFORM_SRC})
 
 # setup dependencies
-if(SFML_OS_LINUX OR SFML_OS_FREEBSD OR SFML_OS_MACOSX)
+if(SFML_OS_LINUX OR SFML_OS_FREEBSD OR SFML_OS_NETBSD OR SFML_OS_MACOSX)
     target_link_libraries(sfml-system PRIVATE pthread)
 endif()
 if(SFML_OS_LINUX)