# Set Compiler Options

To use the Xcode* environment to set compiler options, including options specific to Intel® architecture:

1. Select a target.
2. Under the Build Settings tab, click All.
3. Scroll down to the list of ICC Intel® C++ Compiler categories.
4. To set an Intel® C++ Compiler Classic option in the Optimization category, scroll down to display Optimization.
5. Select a Setting, such as Enable Interprocedural Optimization for Single File Compilation, and set the option's state. If the Quick Help inspector is visible, information about the selected option appears under Quick Help.

### Tip

Apple* has deprecated the libstdc++ library, make sure you are using the libc++ standard library.

The next time you build your project, the selected options are used in the compilation.

### Note

To view the settings that have changed from the established defaults, select the Levels button under Build Settings.
Parent topic: Use Xcode* (macOS)