cc -g -D -G 0 -I. -I/include receptor.c -c 
cc: Warning: Option -G passed to ld
cc: Warning: File with unknown suffix (0) passed to ld
./olf_ext.h: 2: Can't find include file sim_ext.h
./olf_struct.h: 2: Can't find include file struct_defs.h
*** Error code 2
make: Fatal error: Command failed for target `receptor.o'
