__OpenBSD__        52 opal/mca/event/libevent2022/libevent/kqueue.c #if defined(_EVENT_HAVE_INTTYPES_H) && !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__darwin__) && !defined(__APPLE__)
__OpenBSD__      1256 oshmem/mca/memheap/ptmalloc/malloc.c #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)