Compiler modernization

Improving system utilization by exploiting IBM architectures

Compilers find the best way to transform the source code for the target platform, allowing you to focus on the business logic of your application.

IBM delivers industry-leading compiler optimization technology across multiple platforms, including System z and Power Systems. IBM compilers improve programmer productivity by exploiting advances in hardware and advances in performance optimization, without requiring special coding or source code changes.

Featured compilers

  • COBOL compilers

    COBOL compilers
    Complete offering of compatible, cross-platform, cross-product compilers that support z/OS, VSE/ESA, z/VM, AIX, and IBM i.

  • PL/I compilers

    PL/I compilers
    Complete offering of compatible, cross-platform, cross-product compilers that support z/OS, VM, VSE/ESA, and AIX.

  • C and C++ compilers

    C and C++ compilers
    Advanced compiler and optimization technologies for z/OS, and z/VM on System z as well as AIX, Linux and IBM i on Power Systems and Blue Gene.

IBM Enterprise COBOL
Developer Trial for z/OS

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Featured resources


Realizing the Greatest Value from Your IMS and Compiler Upgrades

Roland Koo, Product Manager for Rational Compilers, and Haley Fung, IMS Senior Developer, identify why it is important to upgrade to the latest versions of IMS and COBOL together.

Enterprise COBOL for z/OS V5.1 moderated discussion

Listen as James Governor, Principal Analyst and Founder, RedMonk, and Kevin Stoodley, IBM Fellow and CTO, IBM Rational, discuss the benefits of the new IBM Enterprise COBOL compiler for z/OS. Jeff Heath, Development Manager, IBM Rational, demonstrates the highlights of this new, modern compiler.

Enterprise COBOL Version 5 Performance Tuning Guide

This paper identifies key performance benefits and tuning considerations when using IBM® Enterprise COBOL for z/OS® Version 5 Release 1.

COBOL Migration Guide

This information provides topics to help you to move to IBM Enterprise COBOL Version 5.1.

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