;
;		define_start macro
;
	.macro define_start  block
block:
__def=.
	.endm define_start
;
;		define macro
;
	.macro	define	name size value
	.iif nb <name>, name = . - __def
	.'size	value
	.endm	define
;
;		define_end macro
;
	.macro	define_end  size
size	=	.-__def
	.endm	define_end