Arch Linux

As of today GHC moved from 8.0.1 to 8.0.2 and I can no longer compile any Haskell project on my Arch system. An example of trying to compile hello world:

$ echo 'main = putStrLn "Hello World"' > Hello.hs

$ ghc Hello.hs
[1 of 1] Compiling Main ( Hello.hs, Hello.o )
Linking Hello ...
/usr/bin/ld: cannot find -lHSbase-4.9.1.0
/usr/bin/ld: cannot find -lHSinteger-gmp-1.0.0.1
/usr/bin/ld: cannot find -lHSghc-prim-0.5.0.0
/usr/bin/ld: cannot find -lHSrts
collect2: error: ld returned 1 exit status
`gcc' failed in phase `Linker'. (Exit code: 1)

It seems to be trying to dynamically link the binary. I've never seen GHC do dynamic linking by default.

I've performed all the debugging steps I could think of, including:

* rm -rf ~/.ghc ~/.cabal
* sudo pacman -Rc ghc && sudo pacman -S ghc
* Googling for the issue, which turned up a lot of more specific posts (build problems in the xmonad package etc.) but nothing on the scope of no Haskell builds working at all.

What gives? Downgrading ghc and cabal-install works around the issue for now, so the problem appears to be with the latest package release.

Thanks,
Johan