Sharing of bits/fcntl.h on Linux (SPARC, x86)

[Roland McGrath]

> Here's the complete patch set, tested on x86-64, testing on x86 still
> under way. I've also added s390 as third architecture.

I just gave it a quick skim but I think it's fine.
We should have a to-do item somewhere about seeing if we can further
consolidate the 'struct flock' definitions.  But that's a later incremental
cleanup.

> Regarding includes: bits/fcntl.h on s390 and SPARC still have includes
> for <bits/wordsize.h> since they use __WORDSIZE.

That's entirely appropriate.


Thanks,
Roland