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 -Naur postgresql-9.0.1.orig/src/pl/plperl/GNUmakefile postgresql-9.0.1/src/pl/plperl/GNUmakefile
--- postgresql-9.0.1.orig/src/pl/plperl/GNUmakefile	2010-10-01 10:25:44.000000000 -0400
+++ postgresql-9.0.1/src/pl/plperl/GNUmakefile	2010-10-11 11:50:19.933972244 -0400
@@ -40,6 +40,9 @@
 
 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) --load-language=plperl  --load-language=plperlu
 REGRESS = plperl plperl_trigger plperl_shared plperl_elog plperl_util plperl_init plperlu
 # if Perl can support two interpreters in one backend,