[Bug 722953] v4l2: ENODATA is Linux-only

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=722953
  GStreamer | gst-plugins-good | unspecified

--- Comment #3 from Ryan Lortie (desrt) <desrt at desrt.ca> 2014-01-25 17:40:16 UTC ---
POSIX pretty explicitly states that the errno constants that is mandates must
be #ifdef-ible:

All values listed in this section shall be unique integer constant expressions
with type int suitable for use in #if preprocessing directives...

http://pubs.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_03.html

Of course, ENODATA is not standard -- but given that POSIX mandates error
constants being defines, I think it's pretty reasonable to assume that the
non-standard error constants that Linux adds will be as well.

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