lsstack (pstack for Linux)

I recently downloaded the lsstack utility. I tried to compile it for ppc but its get failed. See the following error message:

lsstack.c: In function `grok_and_print_thread_stack':
lsstack.c:431: error: `EIP' undeclared (first use in this function)
lsstack.c:431: error: (Each undeclared identifier is reported only once
lsstack.c:431: error: for each function it appears in.)
lsstack.c:438: error: `EBP' undeclared (first use in this function)
lsstack.c: In function `get_file_symbols':
lsstack.c:730: error: `false' undeclared (first use in this function)
make: *** [lsstack] Error 1

I looked into the lsstack.c file and found that the variable EIP, EBP and false is not defined. I got stucked, can anyone tell me how to proceed further.

Can anyone suggest where to defined it?
Is this a known probelm ?
Is this a bug?



Thanks in Advance
Regards,
Jiten