Re: [Mingw-users] predefined macro for MINGW?

[Christoph D. <chr...@hs...>]

On Thu, 06 Jan 2005 02:00:15 -0500
Greg Chicares <chi...@co...> wrote:

> On 2005-01-05 10:25 AM, HERNANDEZ CORDOBA RODRIGO JOSE wrote:
> > 
> ["Christoph Dalitz" wrote]
> > 
> >>while needing a conditional compilation for MingW32 I am wondering
> >>whether there is a predefined macro (like __BORLANDC__ for bcc32)
> >>indicating that the current compiler is mingw32.
> >>
> >>Or do I need to define this myself in the Makefile?
> > 
> > I use:
> > 
> > #if defined(__GNUC__) && defined(WIN32)
> > 
> > #endif
> > 
> > if you're only targeting Windows, you can do without the WIN32 Check.
> 
> MinGW does predefine 'WIN32'
> 
>    C:/tmp[0]$touch foo.h; /MinGW/bin/cpp -dM foo.h |grep -w WIN32
>    #define WIN32 1
> 
> so that's reliable with MinGW, although there's no
> perfectly reliable macro to detect ms windows portably
> AFAIK. I think Paul Grenyer's suggestion
> 
>    __MINGW32__
> 
> is the officially-recommended and best way. Would
> 
>  > #if defined(__GNUC__) && defined(WIN32)
> 
> be true for cygwin as well?
> 
Here is what I get on my win32 system with cygwin gcc 3.3 and minw gcc 2.95:

bash:[tmp]> touch foo.h; D:/MingW32/bin/cpp -dM foo.h | grep -e 'GNU\|WIN32'
#define WIN32 1
#define _WIN32 1
#define __WIN32__ 1
#define __WIN32 1

bash:[tmp]> touch foo.h; /usr/bin/cpp -dM foo.h | grep -e 'GNU\|WIN32'
#define __CYGWIN32__ 1

It seems that none defines __GNUC__ and only MingW32 defines WIN32.

Christoph