pkg-config version confusion

[Dan Kegel]

On Sun, Jan 7, 2018 at 12:06 PM, William Pitcock
<nenolod at dereferenced.org> wrote:
>> Is there a shared conformance test suite yet?
>
> A shared conformance test suite is probably difficult, because pkgconf
> has intentionally different behaviour in some areas (quoting and
> sysroot).

That's ok, the shared suite could confine itself to the areas of agreement.

Where are the areas of disagreement documented?
- Dan