To set options for build options for the project (main project or subproject), select the Build tool node on the project tree to display the Property panel.

Select the phase tab and set build options by setting the necessary properties.

Compile phase: [Compile Options] tab

Assemble phase: [Assemble Options] tab

Link phase: [Link Options] tab

Hex output phase: [Hex Output Options] tab

Create library phase: [Create Library Options] tab

I/O header file generation tool: [I/O Header File Generation Options] tab