[cfe-dev] __builtin_index not recognized.

[Chris Lattner]

added in r101858.

On Apr 18, 2010, at 2:51 PM, Enea Zaffanella wrote:

> Hello.
> 
> The following program fragment, which compiles cleanly using GCC,
> produces the following error with clang++:
> 
> $ cat bug.cc
> char* idx(char *s, int c) {
>   return __builtin_index(s, c);
> }
> 
> 
> $ clang++ -fsyntax-only bug.cc
> bug.cc:2:10: error: use of undeclared identifier '__builtin_index'
>   return __builtin_index(s, c);
>          ^
> 1 error generated.
> 
> 
> Looking into include/clang/Builtins.def, we find
> 
> LIBBUILTIN(index, "c*cC*i",       "f",     "strings.h")
> LIBBUILTIN(rindex, "c*cC*i",      "f",     "strings.h")
> 
> but there are no corresponding lines for __builtin_index and 
> __builtin_rindex.
> 
> Regards,
> Enea Zaffanella.
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