During various stages of processing a compiled REXX exec, TSO/E REXXinvokes a compiler interface routine, if installed, to perform special processing. The compiler runtime processor is not required to use the compiler interface routines. However, you must install those compiler interface routines that the compiler runtime processor requires. You indicate to TSO/E REXX that a compiler interface routine is not required by specifying a module name of eight blanks in the appropriate field of the compiler programming table entry. The four compiler interface routines are:

• compiler interface initialization routine — Initializes a compiler runtime processor
• compiler interface termination routine — Terminates a compiler runtime processor
• compiler interface load routine — Performs specialized processing to service a request to load or free a compiled exec
• compiler interface variable handling routine — Performs specialized processing to service a request to access REXX variables