What is the location of the directory of C header files that match your running
kernel? [/usr/src/linux/include] /usr/src/linux-headers-2.6.38-8/include/

The path "/usr/src/linux-headers-2.6.38-8/include" is a kernel header file 
directory, but it does not contain the file "linux/version.h" as expected.  
This can happen if the kernel has never been built, or if you have invoked the 
"make mrproper" command in your kernel directory.  In any case, you may want to
rebuild your kernel.

What is the location of the directory of C header files that match your running
kernel? [/usr/src/linux/include]