[LLVMdev] Binary output to cout on Windows

[Michael Smith]

The solution (provided in Microsoft's documentation) is to add:
#include <cstdio>
#include <io.h>
#include <fcntl.h>
and run:
  int result = _setmode( _fileno(stdin), _O_BINARY );
  if( result == -1 )
  { std::cerr<<"Cannot set input mode to binary."<<std::endl; return 1;
}
  result = _setmode( _fileno(stdout), _O_BINARY );
  if( result == -1 )
  { std::cerr<<"Cannot set output mode to binary."<<std::endl; return 1;
}
before using cin or cout. I'm not sure where to add this however, since
it needs to be called before any reads or writes are done, but only
needs to be called once. Any suggestions? At the moment in my own code,
I'm adding them to the tools source files, since that's where it's
determined that cin/cout can be used for input/output.

~Michael

-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
On Behalf Of Chris Lattner
Sent: Monday, May 22, 2006 4:36 PM
To: LLVM Developers Mailing List
Subject: RE: [LLVMdev] Binary output to cout on Windows

On Mon, 22 May 2006, Michael Smith wrote:
> llvm-as interprets "-" as using standard output (cout), so llvm-as <
> input.ll -o - | opt has the same behavior. You'll actually find a
> comment on it in llvm-as.cpp, so I guess I shouldn't hold out hope
that
> there's a good way to do it.

Please see:
http://www.parashift.com/c++-faq-lite/input-output.html#faq-15.13

We'd welcome patches to do this, and we can localize this in our system 
support library, but you'd have to figure out the magic to make this 
happen on win32.

-Chris