Make error when use SUBTARGET_OVERRIDE_OPTIONS macro

[Dong Phuong]

In the file target.c, I declare
SUBTARGET_OVERRIDE_OPTIONS to add more command options
for my target : 

------------------------------------------------------
#ifndef SUBTARGET_OVERRIDE_OPTIONS
#define SUBTARGET_OVERRIDE_OPTIONS      
#endif

#define OVERRIDE_OPTIONS                                        \
        {                                                               \
           {"model=", &c166_model_string,                       \
                N_("Code size : small, medium or large")}       \
           SUBTARGET_OVERRIDE_OPTIONS                                   \
        }       
------------------------------------------------------

But when I use "make" to build, it generates error
when parse file "toplev.c"

 ../../GCC-C166/gcc/toplev.c : 5064: error: parse
error before } token.

When I ran to line 5064 of file toplev.c , I saw this
:

-------------------------------------------------------
#ifdef OVERRIDE_OPTIONS
  /* Some machines may reject certain combinations of
options.  */
  OVERRIDE_OPTIONS; <----------------- error line here
#endif 
-------------------------------------------------------

So can you tell me why does it generate this error ? 
Thank you very much !