Re: build/install xml2 when configured with libxml

Tom Lane wrote:
> Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
>
>> Peter Eisentraut wrote:
>>
>>> But the policy is that the presence of features in the final build
>>> should not depend on the incidental presence of features in the build
>>> environment. Either you select a feature, then it's built, or you
>>> don't, then it's not. So the only options we really have are adding
>>> another switch for libxslt, or including it with libxml. I'm not sure
>>> which is better.
>>>
>
>
>> Then let's add a switch for libxslt.
>>
>
> +1 --- the fact that so many buildfarm members only have one of the two
> libraries is pretty suggestive that that's common. We shouldn't require
> both libraries to build the core xml features, if only because
> contrib/xml2 is expected to go away eventually, no?
>
>
>

I don't think it should go away until we provide for equivalents in
core, at least optionally.

Anyway, here's the patch.

cheers

andrew