Re: [Xen-devel] build fixes

[Patrick Colp <pjcolp@xxxxxxxxx>]

Keir Fraser wrote:
> On 12/01/2010 17:22, "Ian Jackson" <Ian.Jackson@xxxxxxxxxxxxx> wrote:
>
> > > -    seek_ret = lseek64(fd, i << PAGE_SHIFT, SEEK_SET);
> > > +    seek_ret = lseek(fd, i << PAGE_SHIFT, SEEK_SET);
> > This is just wrong.  It will break on >2G files.
> We build everything under tools/ with LFS support enabled, so off_t is 64
> bits even in 32-bit environments. FYI The bits to enable LFS support are in
> tools/Rules.mk.
According to the lseek64 man page, for 32-bit architectures to have 64-bit 
off_t, you need:
#define _FILE_OFFSET_BITS 64

Which, as far as I know, isn't set. LFS just makes lseek64 available 
(without it, the function doesn't exist).
Patrick

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