[Mesa-dev] Mesa (master): glsl: Add using statements for standard library functions.

[José Fonseca]

On Fri, 2011-02-04 at 09:58 -0800, Ian Romanick wrote:
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> On 02/03/2011 10:36 PM, Jose Fonseca wrote:
> > This is very odd behavior from Sun's compiler -- unless we include
> > cstdio, printf should be available, not std::printf.
> 
> I think we might use cstdio in some places.  I find it odd that Sun's
> compiler differs from GCC, Visual Studio, ICC, and clang.  I'm tempted
> to say they're doing it wrong.  Is there perhaps a command line option
> for Sun's compiler that could change this behavior?  Not only is having
> to add extra using statements ugly, but I can guarantee it will be
> missed in the future.
> 

If we include cstdio then that would explain it.

If cstdio is implemented with something like:

   namespace std {
   #include <stdio.h>
   };

Then

  #include <cstdio>
  #include <stdio.h>

and

  #include <stdio.h>
  #include <cstdio>

may give different results.

> Maybe the better answer is to not use cstdio and friends at all.

I agree. If there is the change we also use stdio.h somewhere (and there
is because we include some mesa headers), then it's probably better to
stay away from cstdio and friends.

Jose