_IOERR             49 lib/fpending.c #elif defined _IOERR                 /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, UnixWare, mingw, MSVC, NonStop Kernel, OpenVMS */
_IOERR            152 lib/stdio-impl.h # ifndef _IOERR
_IOERR            162 lib/stdio-impl.h #if defined _IOERR