Re: Regression tests fail with musl libc because libpq.so can't be loaded

On 26.03.24 00:43, Tom Lane wrote:
> I wrote:
>> Thomas Munro <thomas(dot)munro(at)gmail(dot)com> writes:
>>> I had originally proposed to avoid anything beginning "LD_" but Tom
>>> suggested being more specific. I doubt LD_PRELOAD can really hurt you
>>> though (the linker probably only needs the value at the start by
>>> definition, not at later dlopen() time (?)).
>
>> Oh, good point. So we could simplify the patch by only looking for
>> LD_LIBRARY_PATH.
>
> I looked at the musl source code you identified and confirmed that
> only the LD_LIBRARY_PATH string is remembered in a static variable;
> LD_PRELOAD is only accessed locally in that initialization function.
> So we only need to do the attached. (I failed to resist the
> temptation to rewrite the comments.)

Yeah, I was more looking for a comment for posterity for *why* we need
to preserve this variable in particular. The updated comment looks
reasonable.