Checklist for Getting Started

Assuming you need to convert your code to 64-bit, the following checklist might be helpful:

Read this entire document with an emphasis on the "Guidelines for Converting to LP64".
Review all data structures and interfaces to verify that these are still valid in the 64-bit environment.
Include <sys/types.h> (or at minimum, <sys/isa_defs.h>) in your code to pull in the _ILP32 or _LP64 definitions as well as many basic derived types.
Move function prototypes and external declarations with non-local scope to headers and include these headers in your code.
Run lint(1) using the -errchk=longptr64 and -Xarch=v9 flags and review each warning individually, being aware that not all warnings require a change to the code. Depending on the resulting changes, you might also want to run lint(1) again, both in 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 on the 32-bit operating system, and the 64-bit version on the 64-bit operating system. You could include testing the 32-bit version on the 64-bit operating system, but this is not necessary.


4. Converting Applications Other Considerations Algorithmic Changes


	Checklist for Getting Started Assuming you need to convert your code to 64-bit, the following checklist might be helpful: Read this entire document with an emphasis on the "Guidelines for Converting to LP64". Review all data structures and interfaces to verify that these are still valid in the 64-bit environment. Include `<sys/types.h>` (or at minimum, `<sys/isa_defs.h>`) in your code to pull in the `_ILP32` or `_LP64` definitions as well as many basic derived types. Move function prototypes and external declarations with non-local scope to headers and include these headers in your code. Run `lint(1)` using the `-errchk=longptr64` and `-Xarch=v9` flags and review each warning individually, being aware that not all warnings require a change to the code. Depending on the resulting changes, you might also want to run `lint(1)` again, both in 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 on the 32-bit operating system, and the 64-bit version on the 64-bit operating system. You could include testing the 32-bit version on the 64-bit operating system, but this is not necessary.