#12485: -package-db flags now need to be sorted by dependency order -------------------------------------+------------------------------------- Reporter: niteria | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.0.3 Component: Package system | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): phab:D2450, Wiki Page: | phab:D2514 -------------------------------------+------------------------------------- Comment (by simonmar):
And this is what I get for not being involved in the initial discussion ;) But it is hard for me to see how you could actually do this, because you can always end up in a situation where you have two separate packages with the same symbol name, and now you have to pick one.
That's true. In that case, either * The ABIs are the same, and we can just pick one, or * The ABIs are different, in which case we can either * report an error, or * Pick one to keep, and throw away everything that depends on the dropped one Reporting an error is bad - when we had something similar before (7.2? I forget exactly) you could get into a state where GHC fails to start because you have some conflict in your package database. That's why the GHC tries really hard to find a consistent set of packages by throwing things away. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12485#comment:21 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler