1 files changed, 12 insertions, 0 deletions
diff --git a/ext/dbm/dbm.c b/ext/dbm/dbm.c
index e0640d9638..dbf1024181 100644
--- a/ext/dbm/dbm.c
+++ b/ext/dbm/dbm.c
@@ -1117,6 +1117,18 @@ Init_dbm(void)
 #else
         version = rb_str_new2("ndbm (unknown)");
 #endif
+        /*
+         * Identifies ndbm library version.
+         *
+         * Examples:
+         *
+         * - "ndbm (4.3BSD)"
+         * - "Berkeley DB 4.8.30: (April  9, 2010)"
+         * - "Berkeley DB (unknown)" (4.4BSD, maybe)
+         * - "GDBM version 1.8.3. 10/15/2002 (built Jul  1 2011 12:32:45)"
+         * - "QDBM 1.8.78"
+         *   
+         */
         rb_define_const(rb_cDBM, "VERSION", version);
     }
 }