quelle.txt: file format not recognized; treating as linker script; gcc.exe' failed in phase `Linker'

Question

I'm trying to compile a Haskell program which takes a string from a txt file and adds it at the end of another string, in a different txt. file. But when I try to compile it in my terminal I get following error message:

C:\Users\Benni>ghc-9.2.3.exe vonquellezumziel1.hs quelle.txt ziel.txt
Loaded package environment from   C:\Users\Benni\AppData\Roaming\ghc\x86_64-mingw32-9.2.3\environments\default  
Linking vonquellezumziel1.exe ...  
C://tools//ghc-9.2.3//mingw//bin/ld.exe:quelle.txt: file format not recognized; treating as linker script  
C://tools//ghc-9.2.3//mingw//bin/ld.exe:quelle.txt:0: syntax error
collect2.exe: error: ld returned 1 exit status  
`gcc.exe' failed in phase `Linker'. (Exit code: 1)

that's the Haskell code which I got from my Prof.:

−− vonquellezumziel1.hs
importSystem.IO
main :: IO()
main = do 
leseGriff <- openFile "quelle.txt" ReadMode
inhalt <- hGetContents leseGriff
schreibGriff <- openFile "ziel.txt" AppendMode
hPutStr schreibGriff inhalt
hClose leseGriff
hClose schreibGriff

the variables are named in German so I hope that's not a problem.

the way I'm using to compile the programs is by using: ghc-9.2.3.exe filename

all the answers I found were for C or C++, but I'm using Haskell so I don't really know what to do.

Thanks for the help.

Answer 1

You seem to be confusing compilation and execution of the compiled program. When you run

> ghc-9.2.3.exe vonquellezumziel1.hs quelle.txt ziel.txt

you are telling the compiler to take the three files vonquellezumziel1.hs , quelle.txt and ziel.txt , and treat them as haskell files, and compile them to a binary executable.

What you actually want to do is first compile the program

> ghc-9.2.3.exe vonquellezumziel1.hs

Then run it

> ./vonquellezumziel1

The program does not take any command line arguments, it just reads and write files from disk in the current directory.

The code you pasted here looks like the formatting is broken, I believe the file should actually look like:

import System.IO

main :: IO()
main = do 
    leseGriff <- openFile "quelle.txt" ReadMode
    inhalt <- hGetContents leseGriff
    schreibGriff <- openFile "ziel.txt" AppendMode
    hPutStr schreibGriff inhalt
    hClose leseGriff
    hClose schreibGriff