From IBM link : http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/index.jsp?topic=%2Fcom.ibm.db2.doc.apsg%2Frxspwrt.htm Writing a REXX stored procedure
Starting with Comparex 8.5.2, PDS/e libraries can be compared. Comparex release 8.6 processes binder program objects through binder format level 4. However, not all binder options are compared, and it is possible for certain functions (e.g. Data Link Libraries (DLLs) or C++ 'mangled' names) to generate incorrect results. Further enhancements are underway to improve capabilities in this area.