• Ian Lynagh's avatar
    By default, be lax about dependencies on GHC · 12646a9c
    Ian Lynagh authored
    There are a number of things which technically depend on GHC (e.g. if
    ghc changes then Haskell files may be compiled differently, or Cabal
    packages may be configured differently). However, in practice, having
    a real dependency on GHC is just a pain: We normally don't want to
    spend time recompiling other things while we're working on the
    compiler, and even if we did, GHC will normally decide compilation
    isn't needed anyway. So by default we use order-only dependencies on
    GHC, i.e. GHC must exist, but if it's newer than other targets then
    rebuilding is not necessary.
ghc.mk 42.5 KB