[Haskell-cafe] How can I redirect stdout?

SevenThunders mattcbro at earthlink.net
Mon Oct 2 14:44:00 EDT 2006

Krasimir Angelov-2 wrote:
> Hi Matthew,
> On Windows stdout/stderr/stdin exists only when your application is
> using the Console OS subsystem. All GUI applications doesn't have
> console window and they don't have stdout/stderr/stdin. When you are
> building DLLs then the subsystem is determined from the type of the
> application that is loading your DLL. In your particular case the DLL
> is loaded from Matlab which is definitely a GUI application. When you
> are trying to load the DLL from other C application then probably it
> is Console application and all print statements simply works. The
> solution that you can use is to replace all your print statements with
> Debug.Trace.trace or Debug.Trace.putTraceMsg. When you are using these
> functions from Console application then the output is redirected to
> stderr but when they are used from GUI application then the output
> goes to the debugger. You can see the output in the Debug pane in the
> Visual Studio IDE while you are running MatLab from the debugger.
> Cheers,
>   Krasimir

Thanks for the suggestion.  Unfortunately I use a lot of formatted print
statements both in Haskell and in C.  I was hoping for a quick fix.  I can,
however redirect some of my output to a file so this will help.

View this message in context: http://www.nabble.com/How-can-I-redirect-stdout--tf2358554.html#a6607349
Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.

More information about the Haskell-Cafe mailing list