# Have to rename to handle differences between assembly/directory names
DEP_LIBS=$(patsubst System.Xml,System.XML,$(LIB_REFS))
-_FILTER_OUT = $(foreach x,$(2),$(if $(findstring $(1),$(x)),,$(x)))
-
LIB_REFS_FULL = $(call _FILTER_OUT,=, $(LIB_REFS))
LIB_REFS_ALIAS = $(filter-out $(LIB_REFS_FULL),$(LIB_REFS))
+ifdef TARGET_NET_REFERENCE
+# System.*.dll references come from the TARGET_NET_REFERENCE dir, others from the profile dir
+LIB_REFS_MONO_FULL = $(call _FILTER_OUT,System,$(LIB_REFS_FULL))
+LIB_REFS_MONO_ALIAS = $(call _FILTER_OUT,System,$(LIB_REFS_ALIAS))
+
+LIB_REFS_SYSTEM_FULL = $(filter-out $(LIB_REFS_MONO_FULL),$(LIB_REFS_FULL))
+LIB_REFS_SYSTEM_ALIAS = $(filter-out $(LIB_REFS_MONO_ALIAS),$(LIB_REFS_ALIAS))
+
+LIB_MCS_FLAGS += $(patsubst %,-r:$(topdir)/../external/binary-reference-assemblies/$(TARGET_NET_REFERENCE)/%.dll,$(LIB_REFS_SYSTEM_FULL))
+LIB_MCS_FLAGS += $(patsubst %,-r:%.dll, $(subst =,=$(topdir)/../external/binary-reference-assemblies/$(TARGET_NET_REFERENCE)/,$(LIB_REFS_SYSTEM_ALIAS)))
+
+LIB_MCS_FLAGS += $(patsubst %,-r:$(topdir)/class/lib/$(PROFILE_DIRECTORY)/%.dll,$(LIB_REFS_MONO_FULL))
+LIB_MCS_FLAGS += $(patsubst %,-r:%.dll, $(subst =,=$(topdir)/class/lib/$(PROFILE_DIRECTORY)/,$(LIB_REFS_MONO_ALIAS)))
+else
LIB_MCS_FLAGS += $(patsubst %,-r:$(topdir)/class/lib/$(PROFILE_DIRECTORY)/%.dll,$(LIB_REFS_FULL))
LIB_MCS_FLAGS += $(patsubst %,-r:%.dll, $(subst =,=$(topdir)/class/lib/$(PROFILE_DIRECTORY)/,$(LIB_REFS_ALIAS)))
+endif
ifdef KEYFILE
KEYFILE_MCS_FLAGS += /keyfile:$(KEYFILE)