[glibc PATCH] fcntl: put F_OFD_* constants under #ifdef __USE_FILE_OFFSET64

[Florian Weimer]

On 08/17/2016 09:20 PM, Jeff Layton wrote:

> It is, but it's preferable to unexpected behavior at runtime. I think
> it's entirely reasonable to require large file offsets in order to use
> OFD locks, but I'm willing to be convinced otherwise if there are use
> cases that you know of that this will break.

I have thought about it some more and I agree that removing the 
definitions for !64-bit is a viable course of action.

We should deprecate F_SETLK64 and struct lock64, too, and document that 
you should use _FILE_OFFSET_BITS == 64 if you need such locks.  That, 
and make fcntl type-safe (for both C and C++ with sufficiently recent GCC).

Florian