Rational Developer for System z
Enterprise COBOL for z/OS, Version 4.1, Programming Guide


Using subprograms

Many applications consist of several separately compiled programs linked together. A run unit (the COBOL term that is synonymous with the Language Environment term enclave) includes one or more object programs and can include object programs written in other Language Environment member languages.

Language Environment provides interlanguage support that allows your Enterprise COBOL programs to call and be called by programs that meet the requirements of Language Environment.

Name prefix alert: Do not use program-names that start with prefixes used by IBM products. If you use programs whose names have any of the following prefixes, CALL statements might resolve to IBM library or compiler routines rather than to the intended program:

related references  
Language Environment Programming Guide (Register conventions)


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