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Date: Sun, 28 Aug 2011 04:36:10 +0100
From: Dave Korn <dave DOT korn DOT cygwin AT gmail DOT com>
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Subject: Re: v*printf functions not available with g++ -std=c++0x
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On 18/08/2011 15:33, Corinna Vinschen wrote:

> If I try that with Yaakov's 4.5.3 cross compilers, then __STRICT_ANSI__
> is not defined with -std=c__0x, unless I also specify `-ansi' on the
> command line.  However, there's a weird warning:
> 
>   $ i686-pc-cygwin-g++ -std=c++0x -dM -E - < /dev/null | grep ANSI
>   cc1: warning: command line option "-std=c++0x" is valid for C++/ObjC++ but not for C
> 
> Well, sure, that's why I called g++, not gcc...

  Ah, but without a file extension, it doesn't know what language you're
feeding it; for some reason -std doesn't imply -x.  Compare:

> $ g++-4 -std=c++0x -dM -E - < /dev/null | grep ANSI
> cc1: warning: command line option "-std=c++0x" is valid for C++/ObjC++ but not f
> or C
> 
> $ g++-4 -std=c++0x -x c++ -dM -E - < /dev/null | grep ANSI
> #define __STRICT_ANSI__ 1
> 
> $

    cheers,
      DaveK


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