/G (Optimize for Processor) Options

Tells the compiler to optimize code generation for the specified processor.
/G{12}
Arguments
/G1
Optimize for Itanium processor. Only available in the Itanium cross compiler or Itanium native compiler.
/G2
Optimize for Itanium2 processor (default between /G1 and /G2) Only available in the Itanium cross compiler or Itanium native compiler.
/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
1. Open the project's Property Pages dialog box. For details, see How to: Open Project Property Pages.
2. Click the C/C++ folder.
3. Click the Command Line property page.
4. Type the compiler option in the Additional Options box.