[Box Backup-dev] Re: [Box Backup] First official Win32 release

[Ben Summers]

On 27 Jan 2006, at 21:14, Chris Wilson wrote:
>
>>>  I take it the windows specific functions don't use off_t? If so  
>>> then
>>>  detect the windows functions, and make AC_SYS_LARGEFILE  
>>> conditional on
>>>  their absence. If present then just set the largefile define(s).
>>
>> I thought the posix emulation stuff "just worked" for large files  
>> on Win32?
>
> In my tests with MinGW, it didn't seem to. As far as I can tell,  
> the MinGW headers always define off_t as "long" (in sys/types.h)  
> which will be 32 bits on all 32-bit platforms. I found some mailing  
> list discussions that told users who wanted large file support to  
> use the Windows-specific functions:

There I was assuming that the emulation stuff used the native Win32  
API (eg SetFilePointerEx which does 64 bit integers). It's probably a  
lot more work to emulate _everything_ like that though.

Ben