iconv() prototype

[Fumitoshi UKAI]

Hi,

On address@hidden, Mr. Tajiri claims that iconv() prototype is 
wrong, it should be necessary to add const to inbuf.  That is, 
prototype of iconv() in iconv.h

 extern size_t iconv (iconv_t __cd, char **__restrict __inbuf,
                     size_t *__restrict __inbytesleft,
                     char **__restrict __outbuf,
                     size_t *__restrict __outbytesleft);

should be

 extern size_t iconv (iconv_t __cd, const char **__restrict __inbuf,
                     size_t *__restrict __inbytesleft,
                     char **__restrict __outbuf,
                     size_t *__restrict __outbytesleft);


As I checked `The Single UNIX Specification, Version 2' from The Open
Group, the latter is correct.  

Why does glibc declare as former?
Is there any reason for this?

Thanks,
Fumitoshi UKAI