hi I've just managed to get ghc-6.8.3 installed and tried to run an example from "http://en.wikibooks.org/wiki/Write_Yourself_a_Scheme_in_48_Hours/Parsing" I run into linking error with parsec: Here is the code: module Main where import System.Environment import Text.ParserCombinators.Parsec hiding (spaces) symbol :: Parser Char symbol = oneOf "!#$%&|*+-/:<=>?@^_~" main :: IO () main = do -- args <- getArgs -- putStrLn ("Hello, " ++ (args!!0) ++ " " ++ (args!!1) ) -- putStrLn ( show( read(args!!0) + read(args!!1) ) ) putStrLn ( "give me a name:" ) name <- getLine putStrLn ( name ) ghc -o /tmp/a.out accu.hs accu.o: In function `so8_info': : undefined reference to `parseczm2zi1zi0zi1_TextziParserCombinatorsziParsecziChar_oneOf_closure' accu.o: In function `spP_info': : undefined reference to `__stginit_parseczm2zi1zi0zi1_TextziParserCombinatorsziParsec_' accu.o: In function `so8_closure': : undefined reference to `parseczm2zi1zi0zi1_TextziParserCombinatorsziParsecziChar_oneOf_closure' collect2: ld returned 1 exit status Thanks my installation steps (just in case you need to know): WGET_UNPACK http://ftp.gnu.org/gnu/readline/readline-4.3.tar.gz ./configure --prefix=/usr make clean ; make || INTERVENTION find . -name libhistory.so* find . -name libreadline.so* cp shlib/libhistory.so.4.3 /lib cp shlib/libreadline.so.4.3 /lib ln -sfvn libhistory.so.4.3 /lib/libhistory.so.4 ln -sfvn libreadline.so.4.3 /lib/libreadline.so.4 WGET_UNPACK http://haskell.org/ghc/dist/6.8.2/ghc-6.8.2-i386-unknown-linux.tar.bz2 cd ghc-6.8.2 autoreconf ./configure --prefix=/usr make install echo 'main = putStrLn "hello"' > t.hs ghc t.hs ./a.out | grep hello || INTERVENTION rm -rf /build/ghc-6.8.2 WGET_UNPACK http://haskell.org/ghc/dist/6.8.3/ghc-6.8.3-src-extralibs.tar.bz2 WGET_UNPACK http://haskell.org/ghc/dist/6.8.3/ghc-6.8.3-src.tar.bz2 cd ghc-6.8.3 autoreconf ./configure --prefix=/usr make clean ; make || INTERVENTION make || INTERVENTION make install echo 'main = putStrLn "hello"' > t.hs ghc t.hs ./a.out | grep hello || INTERVENTION ghc --version | grep 6.8.3 || INTERVENTION