#14381: Consider making ghc-pkg fill in abi-depends based on depends -------------------------------------+------------------------------------- Reporter: ezyang | Owner: tdammers Type: bug | Status: new Priority: highest | Milestone: 8.4.2 Component: ghc-pkg | Version: 8.2.1 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:D4159 Wiki Page: | -------------------------------------+------------------------------------- Comment (by tdammers): OK, I have a patch incoming that should do the trick. One issue though is that there is a theoretical possibility of the same package database being mentioned multiple times; this would sabotage the "get packages below the current one in the stack" logic, because right now, two package databases are considered "the same" iff their locations are equal, and the "get packages below this one in the stack" logic consists of popping all package db's off the stack that are not the same as the "current" one. So if we have a stack like this one: {{{#!hs [ "foo/bar" , "baz/quux" , "foo/bar" , "pizza/olives" ] }}} ...and we're trying to get all the package databases below the second occurrence of "foo/bar", we would want to get just {{{ ["foo/bar", "pizza/olives"]}}}, but we will in fact get the entire stack. Question is whether this is ever going to be a problem in practice - I would assume that having the same package database in the stack more than once would pose all sorts of problems anyway. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14381#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler