Re: [Mingw-w64-public] Question on scanf and modifiers...

[Ozkan S. <se...@gm...>]

On Mon, Feb 1, 2010 at 4:59 AM, David Cleaver <wr...@mo...> wrote:
>
> JonY wrote:
>> There is no such macro as __MINGW64__, use __MINGW64_VERSION_MAJOR
>> instead, its guaranteed to be defined if you include any mingw-w64
>> headers.
>>

To clarify things: __MINGW32__ and __MINGW64__ :
They are both compiler 's built-in macros. __MINGW32__
is valid for both mingw.org and mingw-w64, for both
x86 *and* for x64.  __MINGW64__ is *only* valid for x64,
therefore effectively for mingw-w64, because mingw.org
doesn't support x64 (at least not yet.)

__MINGW64_VERSION_MAJOR, on the other hand, is *not* a
compiler built-in macro. It is a macro defined by the
mingw-w64 headers, specifically through _mingw.h. Most,
if not all, of the headers already include _mingw.h,
so if you want to check for .__MINGW64_VERSION_MAJOR
you must do it *after* including some standart headers
such as stdio.h or stdlib.h or even windows.h

>> I think __USE_MINGW_ANSI_STDIO only applies to the printf family, the
>> scanf family has not been ported yet, so you'll need to use %I64u
>> instead of %llu.
>>
>
> Hello, thank you all for your replies.  I seem to be having some trouble getting
> __MINGW64_VERSION_MAJOR to work for me.  Perhaps I have set up my environment
> wrong?  I've downloaded mingw-w64-bin_x86_64-mingw_20100123_sezero.zip and
> extracted it to its own folder, at c:\mingw64-20100123\ (which has bin, lib,
> lib64, etc in it).  Then I have created a command prompt, that when I start it,
> it sets the PATH to: PATH C:\mingw64-20100123\bin;C:\msys\1.0\bin;%PATH%
> Does this look reasonable so for?
>

Yes.

> I was wondering, how does it know where the correct *.h or *.a files are?  I see
> that most of them are not in \include or \lib, but are under
> \x86_64-w64-mingw32\include and \x86_64-w64-mingw32\lib.  Does the gcc.exe in
> \bin know where to look for these files.  For example, I've created a test

Yes.

> program that includes <stdio.h> and <inttypes.h>.  I've tried putting:
> #ifdef __MINGW64_VERSION_MAJOR
> #define __USE_MINGW_ANSI_STDIO 1
> #endif
> before those 2 includes, but it doesn't seem to work.  If I leave off the ifdef,
> it does work.  Can anyone see what I might be doing wrong?
>

Please do the check *after* the includes. If you truly want
to define the things for mingw-w64 *and* before including
further headers yet, try something like this at the top of
your source:

#ifdef __MINGW32__
#include <_mingw.h>
#endif

#ifdef __MINGW64_VERSION_MAJOR
[your stuff here]
#endif

#include [your actual includes here]

Hope these help.

--
Ozkan