Re: Change copyObject() to use typeof_unqual

On 07.03.26 01:17, Jelte Fennema-Nio wrote:
> On Fri, 6 Mar 2026 at 20:17, Peter Eisentraut <peter(at)eisentraut(dot)org> wrote:
>> This revealed an insufficiency in that commit, which I fix in the first
>> patch.
>
> Thanks!

There is a failure related to this on buildfarm member sevengill:

../pgsql/src/test/modules/test_cplusplusext/test_cplusplusext.cpp:41:22:
error: no template named 'remove_reference_t' in namespace 'std'; did
you mean 'remove_reference'?

I don't know how that makes sense. Maybe this is a problem in the local
installation of the compiler or standard library.

(This is also a bit suspicious because AFAICT, clang 15 defaults to
C++14, but on that animal it thinks it needs to add -std=gnu++11.)

>> I have addressed the above problem by swapping the order of the probes
>> (putting the underscore variant first), as discussed.
>
> Annoying that this is needed, but I agree that it's the least bad
> option in this case.

I committed this and it still fails, but the failure is now narrower.
There is a failure on buildfarm member taipan because it uses an unusual
combination of gcc and clang (the gcc is much newer than clang). The
only sensible workaround I could think of is a hardcoded override based
on the clang version, as in the attached patch. And alternative is that
we decide that we don't want to support this combination, meaning that
we would effectively require that clang is approximately as-old-or-newer
than gcc.