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The Processor options direct the compiler to optimize code generation for the 80386, 80486, or PentiumŪ processors.
| Command Line | Project Settings | Description |
| /GB | Blend | Optimizes the code created to favor the Pentium. It blends the optimizations for the 80386 (/G3), 80486 (/G4), Pentium (/G5), and Pentium Pro (/G6) options. This option forces a value of 500 for the _M_IX86 preprocessor macro. This value is the default. Future versions of the compiler will issue a different value to reflect the dominant processor. |
| /G6 | Pentium Pro | Optimizes the code created to favor the Pentium Pro. Use this option for programs meant only for the Pentium Pro. This option forces a value of 600 for the _M_IX86 preprocessor macro. |
| /G5 | Pentium | Optimizes the code created to favor the Pentium. Use this option for programs meant only for the Pentium. This option forces a value of 500 for the _M_IX86 preprocessor macro. |
| /G3 | 80386 | Phased out for Visual C++ 5.0. Forces a value of 300 for the _M_IX86 preprocessor macro. The compiler ignores this option. |
| /G4 | 80486 | Phased out in Visual C++ 5.0. Forces a value of 400 for the _M_IX86 preprocessor macro. The compiler ignores this option. |
To find these options in the development environment, click Settings on the Project menu. Then click the C/C++ tab, and click Code Generation in the Category box. Click the Processor drop-down list.