Use the wctype builtins functions

[Shujing Zhao]

Hi,

I want to use the the wctype builtins ISWALPHA and the other ISW* functions to 
handle the wide character string, but I get the following error:

/home/gcc/build/gcc/../../trunk/gcc/opts.c:1190: undefined reference to 
`ISWALPHA'
collect2: ld returned 1 exist status

I have tried to grep some examples that use the ISW* builtins, but didn't find 
any one. Does anyone know how to use them?

Thanks
Pearly