Re: "make check" in src/test/isolation is unworkable

On sön, 2011-05-08 at 19:35 -0400, Tom Lane wrote:
> I believe that the "make check" target in src/test/isolation is
> fundamentally unportable, as is illustrated by the fact that buildfarm
> member coypu is currently choking on it.  The reason is that the
> pg_isolation_regress program depends on libpq, and in particular it
> depends on having an *installed* libpq.  Anyplace where it appears to
> work, it's because you already installed Postgres, or at least libpq. 

I came across this old issue.  Unless I'm missing something, there is no
reason why pg_isolation_regress needs to be linked with libpq at all,
and it works fine without it.  If we removed the libpq link, then it
would work just like pg_regress and could support "make check".

Apparently, -Wl,--as-needed isn't working too well here.