/G (Optimize for Processor) Options
Tells the compiler to optimize code generation for the specified processor.
/G is available in all editions of Visual C++, but the compiler can perform more optimizations when /G is used with one of the /O compiler options. However, /O is not available in the Visual C++ standard edition.
To set this compiler option in the Visual Studio development environment
Open the project's Property Pages dialog box. For details, see How to: Open Project Property Pages.
Click the C/C++ folder.
Click the Command Line property page.
Type the compiler option in the Additional Options box.
To set this compiler option programmatically