problem compiling programs with monads with ghc-6.4

[Donald Bruce Stewart]

Add -package mtl ?

vkonovalov:
> Dear all,
> 
> When I compile simple programs with monads, I receive following error:
> 
> example18.o(.text+0x2de):fake: undefined reference to
> `ControlziMonadziCont_zdfMonadContCont_closure'
> example18.o(.text+0x422):fake: undefined reference to
> `ControlziMonadziCont_zdfMonadContCont_closure'
> example18.o(.text+0x16f5):fake: undefined reference to
> `__stginit_ControlziMonadziCont_'
> example18.o(.data+0xa8):fake: undefined reference to
> `ControlziMonadziCont_zdfMonadContCont_closure'
> example18.o(.data+0xe8):fake: undefined reference to
> `ControlziMonadziCont_zdfMonadContCont_closure'
> 
> When I do 
> ghc E:\apps\ghc-6.4\libHSmtl.a -o example18.exe example18.hs
> all is fine.
> 
> For some reasons, libHSmtl.a is not seen by default.
> 
> What I am missing?
> 
> I feel this is configuration problem, but I afraid editing "package.conf" or
> alike, because I'll probably make situation worse.
> 
> TIA.
> 
> Best regards,
> Vadim.
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