Re: 'errno' undefined?

Philip Warner <pjw@rhyme.com.au> writes:
>> they weren't on my platform.  But maybe something in there was needed
>> on yours.  Where does errno get declared in your system's headers?

> errno.h

Hmm.  The stuff I just removed doesn't look like it would cause an
inclusion of errno.h.  Which other system headers include errno.h
on your box?

The answer probably is that pqformat.h needs to include <errno.h>,
but I'm just curious to understand why it didn't before ...
        regards, tom lane