Kludge to remove -lpam from LIBS in Makefiles.

Per Issue #7 from armanddp, it seems the RHEL/CentOS packages
of Postgres are built against libpam, which shows up in
the LIBS reported by pg_config. We don't actually need to
link in libpam for pg_repack, so manually remove it from
our LIBS. This helps a little bit for building on
RHEL/CentOS, though the issue of libpgport.a missing
on that platform still looms.

bin/Makefile

@@ -30,7 +30,9 @@ PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
 include $(PGXS)
 
-# remove dependency to libxml2 and libxslt
+# remove dependency on libxml2, libxslt, and libpam.
+# XXX: find a better way to make sure we are linking with libraries
+# from pg_config which we actually need.
 LIBS := $(filter-out -lxml2, $(LIBS))
 LIBS := $(filter-out -lxslt, $(LIBS))
-
+LIBS := $(filter-out -lpam, $(LIBS))

lib/Makefile

@@ -35,9 +35,12 @@ USE_PGXS = 1
 PGXS := $(shell $(PG_CONFIG) --pgxs)
 include $(PGXS)
 
-# remove dependency to libxml2 and libxslt
+# remove dependency on libxml2, libxslt, and libpam.
+# XXX: find a better way to make sure we are linking with libraries
+# from pg_config which we actually need.
 LIBS := $(filter-out -lxml2, $(LIBS))
 LIBS := $(filter-out -lxslt, $(LIBS))
+LIBS := $(filter-out -lpam, $(LIBS))
 
 pg_repack.sql: pg_repack.sql.in
 	echo "BEGIN;\n" > $@; \