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.munro@gmail.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.