On Thu, Aug 1, 2013 at 11:04 AM, Marcel Wid <[email protected]> wrote:
> Hi,
>
> the problem here is that Microsoft doesn't implement snprintf C99
> conforming. When the buffer is not big enough, Microsoft's
> implementation returns a negative value (see
> http://msdn.microsoft.com/en-us/library/2ts7cx93%28v=vs.110%29.aspx).
>
> Now mingw-w64 per default delegates a call to snprintf to Microsoft's C
> runtime and hence you get the surprising result.
>
> If you want to use an ISO C99 conforming implementation of the C
> standard library, you have to define the Macro _ISOC99_SOURCE. Then
> everything should work as expected.
>
>
Thank you Marcel and Dongsheng for your responses.
I believe I incorrectly outlined my question, is not about C99
compatibility what worries me but MinGW vs mingw-w64 behavior.
It is not clear for me why mingw.org (GCC 4.7.2) does works while mingw-w64
(GCC 4.7.2 and 4.7.3) produces the failure.
Shouldn't compatibility in this regard be considered?
>From your statements, the behavior of mingw.org is incorrect and the one of
mingw-w64 is the correct, cool with that.
Now, the suggestions about the definitions seems a bit inconsistent. Marcel
suggest usage of _ISOC99_SOURCE, Dongsheng suggest usage of
__USE_MINGW_ANSI_STDIO
Former sounds redundant considering -std=c99 has been given to the GCC to
compile, so it should treat the source as C99. The second suggestion sounds
a bit too internal, which I should now forward to rugged (libgit2
developers) and see if they can implement it in the code.
Sorry for being a bit stubborn but I want to be sure that the
recommendations given to others are consistent.
Thank you for your time.
--
Luis Lavena
AREA 17
-
Perfection in design is achieved not when there is nothing more to add,
but rather when there is nothing more to take away.
Antoine de Saint-Exupéry
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