Question

I wrote a basic hello world program in haskel and tried to compile it with:
ghc filename.hs. It produces .hi and .o files but no executable and displays
this error in the linker:

marox@IT-marox:~/Marox$ ghc tupel.hs
Linking tupel …
/usr/bin/ld: –hash-size=31: unknown option
/usr/bin/ld: use the –help option for usage information
collect2: ld returned 1 exit status

Googling didn’t return any useful information.

I am on ubuntu 12.04.

How can I fix this?

Answer 1

Have you binutils-gold installed? If yes, this is the problem (since the gold linker does not support --hash-size AFAIK).

Possible solutions:

1. remove gold
2. your ld probably links to ld.gold, so change the symlink to ld.ld
3. tell the haskell compiler explicitly which linker to use with the -pgml option: ghc -pgml ld.ld tupel.hs
4. install ghc from source, since the configure script of ghc will then build ghc so that it won’t use --hash-size
5. Depending on your version of ghc, you can adjust the linker settings in ghc‘s setting file /usr/lib/ghc-your.ghc.version/settings