[CMake] Platform tests counts as errors.

[Vladislav Vaintroub]

> -----Original Message-----
> From: cmake-bounces at cmake.org [mailto:cmake-bounces at cmake.org] On
> Behalf Of David Cole
> Sent: Dienstag, 22. März 2011 21:09
> To: Óscar Fuentes
> Cc: cmake at cmake.org
> Subject: Re: [CMake] Platform tests counts as errors.
> 
> We theorize that:
> Visual Studio tools detect that they are running as a sub-process in a
> Visual Studio environment and send their output to a named pipe
> instead of stdout.
> 
> If anybody has a pointer to some conclusive proof regarding this
> theory, feel free to send it along.

Back in 2006, Kevin Frei  (C/C++ compiler backend teamlead at that time)
wrote a blog describing how  VS_UNICODE_OUTPUT environment variable works:
http://blogs.msdn.com/b/freik/archive/2006/04/05/569025.aspx 
Your theory appears to be correct, according to this post.

Vladislav