tmpfile.3 contains the following text:
NOTES
POSIX.1-2001 specifies: an error message may be written to stdout if
the stream cannot be opened.
I can find no such text in POSIX.1-2001 (looking at
https://pubs.opengroup.org/onlinepubs/007904975/functions/tmpfile.html)
and such an allowance would contradict ISO C which makes no such
allowance for it to write to stdout. I'm not sure where this came from
but it should probably be removed, or changed to indicate whichever
historical implementation wrongly did this if there was one.
Rich
