diff --git a/ToDo b/ToDo
index 9d1e390..006e1c8 100644
--- a/ToDo
+++ b/ToDo
@@ -5,8 +5,10 @@
 * type handling
         * "extern char*[] sys_errlist" is array, not pointer
         * &puts should be typed as int(*)(char*)*, not int(*)(char*)**
-* bin/cbc: resolve symbolic link
+* check opassign semantic as operator
 * -fPIE, -pie
+        * implement difference against PIC
+* --readonly-plt
 * remove all FIXME
 
 == Done
@@ -255,3 +257,4 @@
         - Label -> Symbol
         - all Symbols should be got from objects
         - implement unnamed (code) Label
+- bin/cbc: resolve symbolic link