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-9.1.5.orig/src/pl/plperl/GNUmakefile postgresql-9.1.5/src/pl/plperl/GNUmakefile
--- postgresql-9.1.5.orig/src/pl/plperl/GNUmakefile 2012-08-14 18:41:04.000000000 -0400
+++ postgresql-9.1.5/src/pl/plperl/GNUmakefile 2012-08-17 11:15:09.457116708 -0400
@@ -43,6 +43,9 @@
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-extension=plperl --load-extension=plperlu
REGRESS = plperl plperl_lc plperl_trigger plperl_shared plperl_elog plperl_util plperl_init plperlu plperl_array
# if Perl can support two interpreters in one backend,