[Haskell-beginners] different getChar behaviour in interpeter and compiled program

[Motiejus Jakštys]

On Sun, Oct 14, 2012 at 11:31:58AM -0400, Brandon Allbery wrote:
> On Sun, Oct 14, 2012 at 11:14 AM, Motiejus Jakštys <desired.mta at gmail.com>wrote:
> 
> > The behaviour is fine: right after entering a character, I get echo
> > back.
> >
> > However, when started with runhaskell (or compiled ./getchar):
> >
> >     motiejus at precise> runhaskell getchar.hs
> >     la<CR>
> >     Entered: l
> >     Entered: a
> >     Entered:
> >
> 
> http://www.haskell.org/ghc/docs/latest/html/users_guide/ghci-faq.htmlscroll
> to the bottom.
> 

Thanks.

Not exactly like in the FAQ, but it lead me to the right direction. In
my case stdin in ghci is not buffered, whereas in ghc it is line
buffered. Turning stdin buffering off before getChar (hSetBuffering
stdin NoBuffering) made it work.

Regards,
Motiejus