Support for universal character

[debugger_gcc]

hello,

For the scenario where i declare a variable as 
int \uA0A0;          // in a C program

i get an error with message
error: universal character \uA0A0 is not valid in an identifier
when compiled using gcc-4.4.1 on linux.

However C99 standards specify only the following constraints on universal
characters :

Section 6.4.3 ISO/IEC 9899:TC3
" A universal character name shall not specify a character whose short
identifier is less than
00A0 other than 0024 ($), 0040 (@), or 0060 (‘), nor one in the range D800
through
DFFF inclusive.62) "

so why doesnt gcc 4.4.1 throws an error saying "its not valid in an
identifier"?
Does gcc enforce some additional constraints regarding the usage of
universal character in C program?

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