[gmx-users] FAQ: File too big

[Erik Lindahl]

> man open
>
>        O_LARGEFILE
>               On  32-bit  systems  that  support the Large Files 
> System,
> allow
>               files whose sizes cannot be represented in 31 bits to be
> opened.
>
>
> Maybe we should try implementing this.
> I don't know whether it is portable though.
>
Hi,

I just checked on 2-3 boxes, and it seems to be available on those.

Since I'm anyway checking for it in the configure script we can use the 
HAVE_FSEEKO define to determine if large files area available/working. 
(i.e. keep the old O_RDONLY for 32-bits).

Cheers,

Erik