diff --git a/Common/make/ghdl.mk b/Common/make/ghdl.mk
index b42ac18..5e8a51b 100644
--- a/Common/make/ghdl.mk
+++ b/Common/make/ghdl.mk
@@ -20,8 +20,23 @@ RUN_OPTS += --stop-time=$(RUN_TIME)
 GHDL_OPTS += --work=$(WORK_LIB) --workdir=$(WORK_DIR) --std=$(LANG_STD) --ieee=$(IEEE_STD)
 
 # -------------------------------------------------
+# Make unique
+# -------------------------------------------------
+define uniq =
+  $(eval seen :=)
+  $(foreach _,$1,$(if $(filter $_,${seen}),,$(eval seen += $_)))
+  ${seen}
+endef
+SRCS := $(abspath $(SRCS))
+SRCS := $(call uniq,$(SRCS))
+SRCS := $(filter-out  ,$(SRCS))
+#$(info ----------------------)
+#$(info $(SRCS))
+#$(info ----------------------)
 
+# -------------------------------------------------
 # GHDL binary
+# -------------------------------------------------
 GHDL := ghdl
 GHDL_GCC := ghdl-gcc
 
@@ -34,7 +49,9 @@ GTK_OPTS-$(WITH_VCD) := --vcd=$(SIM_FILE-y)
 GTK_OPTS-$(WITH_FST) := --fst=$(SIM_FILE-y)
 GTK_OPTS-$(WITH_GHW) := --wave=$(SIM_FILE-y)
 
+# -------------------------------------------------
 # Targets
+# -------------------------------------------------
 all:  analyze
 
 $(WORK_DIR):