I was building the UART example. I did finally succeed. Part of the secret is the video included with the PSP at pdk_C6748_2_0_0_0\biospsp_03_00_01_00\docs\C6748\C6748_BIOSPSP_CCSProjectCreation.wmv
This doesn't quite get you there though. There were still include paths and libraries I needed to add to the project. By recursively grepping the PSP and SYS/BIOS source trees, I was able to figure out these missing pieces.