[Haskell-cafe] How to check if two Haskell files are the same?

[Mauricio]

Hi,

I would like to write a Haskell pretty-printer,
using standard libraries for that. How can I
check if the original and the pretty-printed
versions are the same? For instance, is there
a file generated by GHC at the compilation
pipe that is always guaranteed to have the
same MD5 hash when it comes from equivalent
source?

Thanks,
Maurício