[Bug libstdc++/80340] error: 'write' was not declared in this scope

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80340

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |INVALID

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Sumit from comment #5)
> (In reply to Jonathan Wakely from comment #4)
> > (In reply to Jonathan Wakely from comment #2)
> > > Configuring GCC with --disable-libstdcxx-verbose will remove the use of
> > > write in that file
> 
> Is this flag --disable-libstdcxx-verbose enabled because
> "--disable-libstdcxx-pch" is configured in my configuration?

It's not enabled. I'm suggesting that you enable it, it will solve your
problem.


(In reply to Sumit from comment #6)
> If I do not configure for hosted environment by using
> --disable-hosted-libstdcxx, I did not see this error.
> 
> Any clues?

Isn't the code a pretty big clue?

#if _GLIBCXX_HOSTED && _GLIBCXX_VERBOSE
#ifdef _GLIBCXX_HAVE_UNISTD_H
# include <unistd.h>
# define writestr(str)  write(2, str, sizeof(str) - 1)
# ifdef __GNU_LIBRARY__
  /* Avoid forcing the library's meaning of `write' on the user program
     by using the "internal" name (for use within the library).  */
/*#  define write(fd, buf, n)   __write((fd), (buf), (n))*/
# endif
#else
# include <cstdio>
# define writestr(str)  std::fputs(str, stderr)
#endif
#else
# define writestr(str) /* Empty */
#endif

If you use --disable-hosted-libstdcxx or --disable-libstdcxx-verbose then
there's no call to ::write

Please stop trying to use Bugzilla to find out how to configure an unsupported
version GCC for your target. This is not the right place.