We configure Postgres with --disable-rpath because for the most part we

want to leave it to ldconfig to determine where libraries are.  However,

for some reason the Perl package puts libperl.so in a nonstandard place

and doesn't add that place to the ldconfig search path.  I think this

is a Perl packaging bug, myself, but apparently it's not going to change.

So work around it by adding an rpath spec to plperl.so (only).

Per bug #162198.

diff -up postgresql-13.1/src/pl/plperl/GNUmakefile.patch3 postgresql-13.1/src/pl/plperl/GNUmakefile

--- postgresql-13.1/src/pl/plperl/GNUmakefile.patch3	2020-12-09 21:29:47.269556344 +0100

+++ postgresql-13.1/src/pl/plperl/GNUmakefile	2020-12-09 21:31:06.100395606 +0100

@@ -55,6 +55,9 @@ endif # win32

 SHLIB_LINK = $(perl_embed_ldflags)

+# Force rpath to be used even though we disable it everywhere else

+SHLIB_LINK += $(rpath)

+

 REGRESS_OPTS = --dbname=$(PL_TESTDB)

 REGRESS = plperl_setup plperl plperl_lc plperl_trigger plperl_shared \

 	plperl_elog plperl_util plperl_init plperlu plperl_array \