On Feb 27 17:46, Martin Wege via Cygwin wrote: > Hello, >> Does Cygwin support openat(O_DIRECT)? Which effect does O_DIRECT in > Cygwin have, and which underlying Windows API is used? https://cygwin.com/cgit/newlib-cygwin/tree/winsup/cygwin/fhandler/base.cc#n587 Corinna