add common lib
diff --git a/libasn1common/Makefile.am b/libasn1common/Makefile.am
new file mode 100644
index 0000000..309ad79
--- /dev/null
+++ b/libasn1common/Makefile.am
@@ -0,0 +1,8 @@
+
+noinst_LTLIBRARIES = libasn1common.la
+
+libasn1common_la_SOURCES =              \
+    asn1_ref.c asn1_ref.h               \
+    asn1_buffer.c asn1_buffer.h         \
+    asn1_namespace.c asn1_namespace.h
+