$OpenBSD: patch-CMakeLists_txt,v 1.7 2018/04/17 05:58:30 rsadowski Exp $
Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -449,7 +449,7 @@ if(UNIX)
     CHECK_INCLUDE_FILE(pthread.h HAVE_LIBPTHREAD)
     if(ANDROID)
       set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} dl m log)
-    elseif(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD|NetBSD|DragonFly")
+    elseif(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD|NetBSD|DragonFly|OpenBSD")
       set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} m pthread)
     elseif(${CMAKE_SYSTEM_NAME} MATCHES "QNX")
       set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} m)
