WIN32_LEAN_AND_MEAN 60 opal/mca/event/libevent2022/libevent/event.h #ifndef WIN32_LEAN_AND_MEAN WIN32_LEAN_AND_MEAN 54 opal/win32/win_compat.h #ifndef WIN32_LEAN_AND_MEAN WIN32_LEAN_AND_MEAN 97 opal/win32/win_compat.h #ifndef WIN32_LEAN_AND_MEAN