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Oracle® Developer Studio 12.6: C User's Guide

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Updated: July 2017

8.5 Checklist for Getting Started

Use the following checklist to help you convert your code to 64-bit.

  • Review all data structures and interfaces to verify that these are still valid in the 64-bit environment.

  • Include <inttypes.h> in your code to provide the _ILP32 or _LP64 definitions as well as many basic derived types. For systems programs, include <sys/types.h> (or at a minimum, <sys/isa_defs.h>) to obtain the definitions of _ILP32 or _LP64.

  • Move function prototypes and external declarations with non-local scope to headers and include these headers in your code.

  • Run lint using the -m64 and -errchk=longptr64 and signext options. Review each warning individually. Keep in mind that not all warnings require a change to the code. Depending on the changes, run lint again in both 32-bit and 64-bit modes.

  • Compile code as both 32-bit and 64-bit unless the application is being provided only as 64-bit.

  • Test the application by executing the 32-bit version and the 64-bit versions on the 64-bit operating system.