RE: writing to stdout in an windows app without a console

16 Feb 2005

      On Wed, 2005-02-16 at 14:49 +0000, Simon Marlow wrote:
...
On 16 February 2005 14:06, Duncan Coutts wrote:
...
On Wed, 2005-02-16 at 14:31 +0200, Krasimir Angelov wrote:
...
On Wed, 16 Feb 2005 12:01:06 +0000, Duncan Coutts
 wrote:
...
What's your opinion of making writing to stdout fail without
raising an exception when the application is compiled with
--subsystem windows?
...
I've seen this behaviour vary between versions of Windows (maybe even
between versions of msvcrt, MS's C library).  A strange experience we
had with the Visual Studio extension was that I was initially just doing
output to stderr from the DLL for debugging, which worked fine on my
machine but crashed on other people's machines.  We had to remove all
uses of stdout/stderr from the Haskell DLL (including the runtime!) to
get it going reliably.
Ok, fair enough. It sounds like with the improvements in ghc 6.4 we'll
be able to turn the --subsystem windows on by default for gtk2hs when
using ghc 6.4, though we'll still have to warn people not to use normal
output functions.

[and we'll have to fix all our demos! :-) ]

Duncan