What is ILE in AS/400?

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AS/400
ILE
What is ILE in AS/400?
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Integrated Language Environment.

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  • TheRealRaven
    The question is too broad (interview?). The subject should be researched by reviewing the IBM documentation. Some general comments are possible.

    ILE is Integrated Language Environment. It refers to the change in compiler technology that was brought into the AS/400-series of systems back in the mid-1990s.

    The new compilers created compiled *MODULE objects that then could be bound together in a linkage process that created *PGM (executable program) objects. The earlier OPM (Original Program Model) technology compiles source directly into *PGM objects.

    A most useful aspect is that a language (COBOL, RPG, C, and even CL) that provides ILE capability can generate *MODULE objects that can be bound with *MODULEs from a different language. With ILE, different functions of a *PGM can be created in languages that are most appropriate. A single program might be created that contains *MODULEs from any or all of the various languages.

    And one example of that is how C language run-time library routines can be used by other languages as if they are APIs. The C printf() run-time library function can be used by an ILE CL *MODULE to provide printing capability for example.

    Many other capabilities are related. Background is found in the ILE Concepts manual from the Information Center.
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