Hi Chris,
I am finally be able to compile the SYS/BIOS code for desktop-linux-sdk demo. I believe there are some dependencies between these tools, previously I used the newest one of each of them, say the CCS tool is 5.5.0.17. I think that's why the c6678 packages cannot be installed in it. Then I installed the MCSDK tool 02.01.02 and the corresponding CCS, then it worked. Now my CCS is 5.4.1.18.
For some compiling reasons, the desktop-linux-sdk requires the OS should be Ubuntu 12.04 and kernel 3.2.0.25. I'll move to the next step to run some computation on the DSP. Thank you for your great help.
Jie