$OpenBSD: patch-cmake_OpenCVPCHSupport_cmake,v 1.1.1.1 2019/03/22 20:39:06 rsadowski Exp $
Index: cmake/OpenCVPCHSupport.cmake
--- cmake/OpenCVPCHSupport.cmake.orig
+++ cmake/OpenCVPCHSupport.cmake
@@ -15,7 +15,11 @@
 IF(CMAKE_COMPILER_IS_GNUCXX)
 
     IF(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.2.0")
-        SET(PCHSupport_FOUND TRUE)
+        IF(${CMAKE_SYSTEM_NAME} STREQUAL "OpenBSD")
+            SET(PCHSupport_FOUND FALSE)
+        ELSE(${CMAKE_SYSTEM_NAME} STREQUAL "OpenBSD")
+            SET(PCHSupport_FOUND TRUE)
+        ENDIF()
     ENDIF()
 
     SET(_PCH_include_prefix "-I")
