+#LIBRARY_VERSION= 0:0:0
+# | | |
+# +------+ | +---+
+# | | |
+# current:revision:age
+# | | |
+# | | +- Increment if interfaces have been added
+# | | Set to zero if interfaces have been removed or
+# | | changed
+# | +- Increment if source code has changed
+# | Set to zero if current is incremented
+# +- Increment if interfaces have been added, removed or changed
+