$OpenBSD$ --- 3rdparty/cmake/minizip.cmake.orig Sat Jan 30 18:39:54 2016 +++ 3rdparty/cmake/minizip.cmake Thu Mar 3 18:18:07 2016 @@ -21,7 +21,7 @@ if(WIN32) endif() # OS X doesn't have fopen64. -if(APPLE) +if(APPLE OR ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD") set(PROJECT_C_FLAGS "${PROJECT_C_FLAGS} -DUSE_FILE32API") endif()