People, I have ghc-7.4.0.20111219 made from source and tested it on the DoCon-2.12 application -- thanks to people for their help! It looks all right. This was -- with skipping the module Random. Now it remains to add the Random package. I have taken AC-Random Version 0.1 from hackage. Its installation requires Cabal:
which cabal cabal: Command not found.
And Cabal is difficult to install, it reports that such and such package versions are missing. On the other hand, Cabal is, probably, present inside ghc-7.4.0.20111219, somewhere in the installation directory. Thus I see its .a and .o files in ~/ghc/7.4.1pre/inst0/lib/ghc-7.4.0.20111219/Cabal-1.14.0/ Can you, please, tell me what is the simplest way to install Random in this situation? Thank you in advance for your explanation, ------ Sergei mechvel@botik.ru