message: In defaults.mk, use $(ZLIB_LIB) in place of -lz.
diff: @@ -256,7 +256,7 @@ CONDUIT_HDF5_HEADER=$(CONDUIT_DIR)/include/conduit/conduit_relay_hdf5.hpp
  ifneq (,$(wildcard $(CONDUIT_HDF5_HEADER)))
  CONDUIT_OPT += -I$(HDF5_DIR)/include
  CONDUIT_LIB += -Wl,-rpath,$(HDF5_DIR)/lib -L$(HDF5_DIR)/lib \
  - -lhdf5 -lz
  + -lhdf5 $(ZLIB_LIB)
  endif
  # Sidre and required libraries configuration
  @@ -268,7 +268,7 @@ SIDRE_LIB = \
  -Wl,-rpath,$(SIDRE_DIR)/lib -L$(SIDRE_DIR)/lib \
  -Wl,-rpath,$(CONDUIT_DIR)/lib -L$(CONDUIT_DIR)/lib \
  -Wl,-rpath,$(HDF5_DIR)/lib -L$(HDF5_DIR)/lib \
  - -lsidre -lslic -laxom_utils -lconduit -lconduit_relay -lhdf5 -lz -ldl
  + -lsidre -lslic -laxom_utils -lconduit -lconduit_relay -lhdf5 $(ZLIB_LIB) -ldl
  # If YES, enable some informational messages
  VERBOSE = NO
  