diff -Naur postgresql-9.0.8/src/pl/plperl/GNUmakefile postgresql-9.0.8.oden/src/pl/plperl/GNUmakefile
--- postgresql-9.0.8/src/pl/plperl/GNUmakefile	2012-06-01 01:09:35.000000000 +0200
+++ postgresql-9.0.8.oden/src/pl/plperl/GNUmakefile	2012-07-26 11:22:13.000000000 +0200
@@ -39,6 +39,7 @@
 PERLCHUNKS = plc_perlboot.pl plc_trusted.pl
 
 SHLIB_LINK = $(perl_embed_ldflags)
+SHLIB_LINK += $(rpath) -Wl,-soname=plperl.so
 
 REGRESS_OPTS = --dbname=$(PL_TESTDB) --load-language=plperl  --load-language=plperlu
 REGRESS = plperl plperl_trigger plperl_shared plperl_elog plperl_util plperl_init plperlu
diff -Naur postgresql-9.0.8/src/pl/plpgsql/src/Makefile postgresql-9.0.8.oden/src/pl/plpgsql/src/Makefile
--- postgresql-9.0.8/src/pl/plpgsql/src/Makefile	2012-06-01 01:09:35.000000000 +0200
+++ postgresql-9.0.8.oden/src/pl/plpgsql/src/Makefile	2012-07-26 11:23:43.000000000 +0200
@@ -16,6 +16,7 @@
 override CPPFLAGS := -I. -I$(srcdir) $(CPPFLAGS)
 SHLIB_LINK = $(filter -lintl, $(LIBS))
 rpath =
+SHLIB_LINK += -Wl,-soname=plpgsql.so
 
 OBJS = pl_gram.o pl_handler.o pl_comp.o pl_exec.o pl_funcs.o pl_scanner.o