A note for when gnulib will add a 'renameat2' module:
- The glibc function is being introduced in 2.28.
- Cygwin has this function as well, but it "only supports the
RENAME_NOREPLACE flag". [1]
- Android might get the function in the future.Bruno [1] https://cygwin.com/cygwin-api/std-notes.html
