To build with SDEI enabled, ensure your system supports the Software Delegated Exception Interface (SDEI) by configuring the necessary firmware and kernel settings. This typically involves enabling SDEI support in the bootloader and verifying compatibility with the ARM architecture. Proper exception handling and event-driven mechanisms should be implemented to leverage SDEI effectively. For example, when developing a Block Blast solver online free, you might optimize the solver's event handling by using SDEI to manage game state updates efficiently, ensuring real-time block placement decisions without performance bottlenecks.