Re: [HEADSUP] Start of Cygwin 1.7 release cycle

[Corinna Vinschen <corinna-cygwin at cygwin dot com>]

On Apr 15 02:48, Brian Dessent wrote:
> Corinna Vinschen wrote:
> 
> > They do?  How and Why?  Is that something which should be rather fixed
> > in newlib instead of in the autogen configuration?
> 
> The BSD implementation of funopen() doesn't explicitly define any types
> for the cookie functions, but simply says they should match the
> signatures of read(2), write(2), lseek(2), and close(2).  Autogen tried
> to define the following if it detected that funopen() exists:
> 
>  typedef int     (cookie_read_function_t )(void *, char *, int);
>  typedef int     (cookie_write_function_t)(void *, const char *, int);
>  typedef fpos_t  (cookie_seek_function_t )(void *, fpos_t, int);
>  typedef int     (cookie_close_function_t)(void *);
> 
> However the newlib implementation explicitly defines these types as:
> 
> typedef ssize_t cookie_read_function_t(void *__cookie, char *__buf, size_t __n);
> typedef ssize_t cookie_write_function_t(void *__cookie, const char *__buf, size_t __n);
> # ifdef __LARGE64_FILES
> typedef int cookie_seek_function_t(void *__cookie, _off64_t *__off, int __whence);
> # else
> typedef int cookie_seek_function_t(void *__cookie, off_t *__off, int __whence);
> # endif /* !__LARGE64_FILES */
> typedef int cookie_close_function_t(void *__cookie);
> 
> So you got an error because the types differ.  I don't see anything
> wrong with the newlib definitions here, as they match the prototypes
> of read/write/etc.  I'm not sure why autogen was trying to define them
> using int instead of size_t or ssize_t, but that's what it was doing
> and it was apparently succeeding because the BSD headers didn't have
> any typedefs.

I see.  So what we have in newlib is how it's defined on Linux.
Howver, shouldn't autogen have the same problem on Linux then?
If not, any idea why?


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat