add unit test for BCD encoding/decoding
diff --git a/src/tests/Makefile b/src/tests/Makefile
new file mode 100644
index 0000000..4722d2d
--- /dev/null
+++ b/src/tests/Makefile
@@ -0,0 +1,9 @@
+
+PKG_INCLUDES:=$(shell pkg-config --cflags libosmocore libosmovty libosmogsm libasn1c)
+PKG_LDFLAGS:=$(shell pkg-config --libs libosmocore libosmovty libosmogsm libasn1c)
+
+CFLAGS:=-g -Wall $(PKG_INCLUDES) -I..
+LDFLAGS:=$(PKG_LDFLAGS)
+
+test-helpers: ../iu_helpers.o test-helpers.c
+ $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^