Comment 7 for bug 999718

Pkgsrc is a packaging system. It provides build recipes and patches (if needed) for building and installing and bundling software.

Note that the glib/gfileutils.c line is commented out (and that file has other example that does use three arguments). So the documentation and the used examples all use the third argument.
I may need to ask about this upstream at glib.

Please consider just using 0 for a mode even if not needed.