Setting environment variables to select 32-bit or 64-bit modes

You can set the OBJECT_MODE environment variable to specify a default compilation mode. Permissible values for the OBJECT_MODE environment variable are:

(unset) Compiler programs generate and/or use 32-bit objects.
32 Compiler programs generate and/or use 32-bit objects.
64 Compiler programs generate and/or use 64-bit objects.
32_64 Set the compiler programs to accept both 32-bit and 64-bit objects. However, you should not use this value. The compiler never functions in this mode, and using this choice may generate an error message depending on other compilation options set at compile-time.

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