GNULIB_defined_O_NONBLOCK   84 lib/open.c     #if GNULIB_defined_O_NONBLOCK
GNULIB_defined_O_NONBLOCK   27 lib/pipe2.c    #if GNULIB_defined_O_NONBLOCK
GNULIB_defined_O_NONBLOCK   88 lib/pipe2.c    # if GNULIB_defined_O_NONBLOCK
GNULIB_defined_O_NONBLOCK  154 lib/pipe2.c    #if GNULIB_defined_O_NONBLOCK || !(defined _WIN32 && ! defined __CYGWIN__)