linux kernel appoint KBUILD_OUTPUT

[vernon2gh]

hi tonyho
Use the KBUILD_OUTPUT option in the Linux kernel to compile, then use PF_Prj_Gen.sh, as follows error:
Not found file: xxxxx/file.c
Not found file: xxxxx/file.h
..........

  Now I need to use KBUILD_OUTPUT option, What should I do?

thank you.