[RFC 00/10] y2038: nptl: futex: Provide support for futex_time64

[Joseph Myers]

On Fri, 17 Jul 2020, Adhemerval Zanella via Libc-alpha wrote:

>   3. Move the {f}xstat{at}{64} to compat symbols and add {f}stat{at}64
>      symbol for 2.33.  My plan is also do decouple the struct stat
>      definition from the kernel and define a glibc generic one for
>      *all* architectures (we can do it because there are new symbols).

That's the sort of change that, although it wouldn't break the ABI as seen 
by an existing set of binaries, would be problematic when any existing 
shared library has struct stat or struct stat64 in its ABI and people try 
to link to it with a new binary without recompiling the shared library, or 
recompile the shared library with new libc without recompiling all 
binaries linked against it.  I don't think such a change to struct stat or 
struct stat64 would be a good idea - but a generic definition certainly 
makes sense for the case of 64-bit time on architectures that don't 
currently have 64-bit time.

-- 
Joseph S. Myers
joseph@codesourcery.com