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../network_utilities.c: In function `generate_and_store_mac_addr':
../network_utilities.c:221: error: `EXT_FLASH_NAME' undeclared (first use in this function)
...
--- Quote End ---
When you use the SSS project template, you are supposed to have a flash memory device where you have stored MAC and IP addresses of your board.
If you don't have it (or even if you don't mean to use this feature), you can simply remove the related code from network_utilities.c and return fixed MAC and IP addresses from get_mac_addr() and get_ip_addr() functions.