Re: iconv(3) protype mismatch with POSIX

[David Holland <dholland-tech%netbsd.org@localhost>]

On Sat, May 28, 2016 at 03:45:35PM +0200, Kamil Rytarowski wrote:
 > [iconv const mess]

So it appears that given

   size_t
   iconv(iconv_t cd,
           char **restrict src, size_t *restrict srcleft,
           char **restrict dst, size_t *restrict dstleft);
   size_t
   __iconv_const(iconv_t cd,
           const char **restrict src, size_t *restrict srcleft,
           char **restrict dst, size_t *restrict dstleft);

one can do

#define iconv(cd, src, srcleft, dst, dstleft) \
        _Generic(src, const char **: __iconv_const,  default: iconv) \
                (cd, src, srcleft, dst, dstleft)

and at least with the gcc5 in current it seems to match as intended.
Plus if anything unexpected comes up #undef iconv makes the magic go
away.

(Also, because implementing things as macros is not 100% benign it
should maybe be disabled by default in strict posix mode.)

Anyone want to check if it works in clang?

-- 
David A. Holland
dholland%netbsd.org@localhost