Re: [Mingw-users] How to use the fseeko64() function ?

[Julien D. <jul...@la...>]

Greg Chicares a écrit :
> On 2009-03-24 22:18Z, Julien Darthenay wrote:
>   
>> I had a problem reading a big file (more then 2 gigabytes) because I 
>> need to use fseek() and ftell() to do what I want with it. I've been 
>> told about the long long data type which I didn't know it exists and the 
>> fseeko() and ftello() functions. I've seen there is no fseeko() function 
>> in my stdio.h, but there is a fseeko64() function and a ftello64() 
>> function which should be what I need. But their definitions are 
>> optionnal and depend of my  #defines. Which #define should I add in my 
>> source code (or -D option in my makefile) in order to use these 
>> functions without any warning ?
>>     
>
> Here's an fseeko64() testcase that is said to need no '-D' option:
>   http://article.gmane.org/gmane.comp.gnu.mingw.user/28881
> Does it work for you? If that doesn't lead to an answer, then post
> a minimal standalone testcase of your own, copying and pasting any
> diagnostics you observe when compiling it.
>
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This don't work. I get the following warnings : (I created the 
fseeko64.c file to test this sample code)
fseeko64.c:15: warning: implicit declaration of function `fileno'
fseeko64.c:22: warning: implicit declaration of function `fseeko64'
fseeko64.c:23: warning: implicit declaration of function `ftello64'


You can't reasonably use a function with a warning and expect it to work.