Haskell – specify the GHC option on the command line through cabal (cabal install) without editing the package Cabal file

When I install vectors with:

cabal install vector

I got a lot of specconstr restriction warnings. If I can specify - fspec constr count = some-higher, it will disappear

>Yes

cabal install vector -fspec-constr-count=HIGH

Work? > If x depends on vectors, is there a way to say in x.cabal that I'd better rely on vectors (if x is not installed) - fpsec constr count = high? Are vectors still maintained or is there a more recommended alternative?

Solution

You can pass additional options for programs run by cabal by using – prog options = opts

cabal install vector --ghc-options=-fspec-constr-count=HIGH