pgsql: Remove further unwanted linker flags from perl_embed_ldflags

Hi Peter,

On Tue, Aug 23, 2022 at 02:29:49PM +0000, Peter Eisentraut wrote:

Remove further unwanted linker flags from perl_embed_ldflags

Remove the contents of $Config{ldflags} from ExtUtils::Embed's ldopts,
like we already do with $Config{ccdlflags}. Those flags are the
choices of those who built the Perl installation, which are not
necessarily appropriate for building PostgreSQL. What we really want
from ldopts are the options identifying the location and name of the
libperl library, but unfortunately it doesn't appear possible to get
that separately from the other stuff.

The motivation for this was to strip -mmacosx-version-min options. We
already did something similar for the -arch option. Both of those are
now covered by this more general approach.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: /messages/by-id/8c4fcb72-2574-ff7c-4c25-1f032d4a2a57@enterprisedb.com

lorikeet (cygwin) has been failing for 9 days now on HEAD, while the
first failure happened here:
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=lorikeet&amp;dt=2022-08-24%2000%3A11%3A00

This means that we have a problem for commits in the range of
c981879814~1..869e56a3. And in this range, it seems to me that this
commit is the primary suspect. Could you look at that?

Thanks,
--
Michael