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Porting Software. by Thomas Himel. What is Porting?. When software is developed, it is intended to execute in a specific computing environment. Porting is adapting software to execute in a new environment. Different Environments. CPU Architecture x86, ARM, Cell Operating System

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Porting software

Porting Software

by Thomas Himel


What is porting
What is Porting?

  • When software is developed, it is intended to execute in a specific computing environment.

  • Porting is adapting software to execute in a new environment.


Different environments
Different Environments

  • CPU Architecture

    • x86, ARM, Cell

  • Operating System

    • Windows, Linux, Android

  • Compiler, loader, preprocessor


Portability
Portability

  • Software is portable when the cost of porting it is less than the cost of rewriting it from scratch.

  • System standards make software more portable.

    • Desktop systems mostly use x86 CPU and Windows, OS X, or Linux operating system.


Portability contd
Portability (contd.)

  • Abstraction in code development

    • Compliance with international standards

  • Usually sacrifice optimization for target system


Software modification
Software Modification

  • Software usually needs be adapted to run correctly on the target platform.

  • Common modifications:

    • Libraries or OS functions not available on target platform

    • Different paths and invalid file naming conventions

    • Different methods of storing values


Software modification contd
Software Modification (contd.)

  • Third-party tools automatically solve some porting issues.

    • High-level compilers output source code in C or C++.

    • Autotools reconfigures code to adapt to Unix-based systems.



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