#8144: Interface hashes include time stamp of included .h file when CPP is used -------------------------------------------------+------------------------- Reporter: nh2 | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time performance bug | Unknown/Multiple Test Case: | Difficulty: Blocking: | Unknown | Blocked By: | Related Tickets: -------------------------------------------------+------------------------- Comment (by nh2): http://www.haskell.org/ghc/docs/7.6.3/html/libraries/ghc/HscTypes.html#t:Usa... see {{{ UsageFile { usg_file_path :: FilePath , usg_mtime :: UTCTime } }}} https://github.com/ghc/ghc/blame/9082111dc/compiler/iface/MkIface.lhs#L603 {{{ iface_hash <- computeFingerprint ... }}} where ''computeFingerprint'' just uses the ''instance Binary Usage'', so the mtime goes into the fingerprint. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8144#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler