finding stddef.h when compiling gmp.h with sdcc

[DAVID JASINSKI]

To whom it may concern,

I am attempting to compile gmp.h with sdcc (small device c compiler), and
during compilation, the gmp.h is unable to find the stddef.h file.  This
error does not occur while using other compilers like gcc.  I have tried to 
put stddef.h and gmp.h local, and this also does not address the problem.  

Below is the error message that I get:

In file included from smart8051.c:34:
/rcg/djasinsk/rsa/gmp.h:41:20: stddef.h: No such file or directory

/rcg/djasinsk/rsa/gmp.h:384: parse error: token -> 'size_t' ; column 65

Thanks for your time,

Sincerely,

David Jasinski