Re: BUG #8271: Configure warning: sys/ucred.h: present but cannot be compiled

On 2013-07-25 09:48:31 -0400, Tom Lane wrote:
> Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> >> Before that commit the checks for cmsgcred which includes sys/ucred.h
> >> happened to include params.h... Patch attached, missing the configure
> >> update since I don't have a compatible autoconf on my laptop, to produce
> >> a minimal diff.
>
> > Could somebody apply the fix (including regenerating /configure)?
>
> The proposed patch seems a bit overcomplicated --- isn't the real
> problem that I changed the ordering of the header probes in
> be4585b1c27ac5dbdd0d61740d18f7ad9a00e268? I think I just alphabetized
> them in a fit of neatnik-ism, not realizing that there were order
> dependencies on some platforms.

Hm. It very well might be too complicated. I am not exactly a autoconf
expert...
The problem is that you can't include sys/ucred.h on some platforms
(e.g. openbsd) without first including sys/params.h because the
resulting file won't compile. Unless I misunderstood what you propose a
different order in that AC_CHECK_HEADERS() shouldn't help getting it
there?
Maybe we could get rid of the two separate tests that now use
HAVE_SYS_PARAM_H - I just tried to followed the surrounding patterns.

FWIW I have confirmation via private emails that the patch works at
least on openbsd...

Greetings,

Andres Freund

--
Andres Freund http://www.2ndQuadrant.com/
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