GHC找不到模块，但GHCi可以找到

Question

I have previously installed the tidal package with cabl install tidal

When running ghc Tidal.hs :

Tidal.hs:4:1: error:
    Could not find module ‘Sound.Tidal.Context’
    There are files missing in the ‘tidal-0.9.6’ package,
    try running 'ghc-pkg check'.
    Locations searched:
      Sound/Tidal/Context.hs
      Sound/Tidal/Context.lhs
      Sound/Tidal/Context.hsig
      Sound/Tidal/Context.lhsig
      /home/chris/.cabal/lib/x86_64-linux-ghc-8.2.2/tidal-0.9.6-HlQOMGZHP8JDJBhFqbDzA/Sound/Tidal/Context.hi
  |
4 | import Sound.Tidal.Context

Within the last filepath that file indeed does not exist but there are files named that end in .dyn_hi . So the full path to the file that does exist is: /home/chris/.cabal/lib/x86_64-linux-ghc-8.2.2/tidal-0.9.6-HlQOMGZHP8JDJBhFqbDzA/Sound/Tidal/Context.dyn_hi

What may be the cause of the error? I am able to import the module successfully within ghci .

Answer 1

I read through this: https://ghc.haskell.org/trac/ghc/wiki/DynamicLinkingDebate

Running it with the -dynamic flag appears to fix it: ghc -dynamic Tidal.hs .