[RFC] Make _FILE_OFFSET_BITS=64 default.

[Rich Felker]

On Thu, Mar 20, 2014 at 01:46:15AM +0000, Joseph S. Myers wrote:
> There's another problem with using such an assertion in fts.h: it's not 
> the correct condition for the two ABIs to be the same.  On MIPS n64, 
> struct stat and struct stat64 have different layout and so 
> _FILE_OFFSET_BITS=64 is an ABI change despite __off_t and __off64_t having 
> the same size (and part of the public fts interface is a pointer to struct 
> stat).

This is beyond disgusting; why was something like that ever allowed
into the ABI, rather than just using the stat64 struct/syscall (or
whichever one is saner) regardless of whether the stat or stat64
userspace function is called?

Rich