#define __FILE__ "<sourcefile>"
#define __LINE__ 0
#define __DATE__ "2018-07-01"
#define __TIME__ "16:21:03"
#define __optimize 115
#define __target "z80"
#define __byte_order "LoHi"
#define __little_endian
#define __b2b 3
#define __bpb 16
#define __bpc 8
#define __bps 8
#define __bpi 16
#define __bpl 32
#define __bpf 32
#define __bplf 32
#define __bpsf 32
#define __bpp 16
#define __bpr 48
#define DEBUG
#define foo 123
#define SAFETY 3
#define BAR ( X ) ( ( X ) * ( X ) )
#define LOGLEVEL 1

#undef•ined macros:

#define Foo Bar