__sun__           109 opal/mca/event/libevent2022/libevent/buffer.c #elif defined(_EVENT_HAVE_SENDFILE) && defined(__sun__) && defined(__svr4__)
__sun__           661 opal/mca/event/libevent2022/libevent/test/regress_buffer.c #if defined(_EVENT_HAVE_SENDFILE) && defined(__sun__) && defined(__svr4__)