Modify the line 315 of rom_sbs.pl to access cpp.exe when not building for Unicode.
a41df078684ad3b64d71f9407a748f84d50d35b1 PDK_3.0.b
f828418ede2a3e3e1cecc4b3424860ae81a94969 PDK_3.0.c
2e0eeacfdf124e1e2e0ce6542de80bdc58a07096 PDK_3.0.d
6d8ad5bee44b0ca68eb8fcfd99b3bc471c613594 PDK_3.0.e