#9370: unfolding info as seen when building a module depends on flags in a previously-compiled module -------------------------------------+------------------------------------- Reporter: carter | Owner: Type: bug | Status: new Priority: high | Milestone: 7.10.1 Component: Compiler | Version: 7.8.3 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: Compile- | Blocked By: time performance bug | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by rwbarton): I would guess it's to avoid the very code size explosion (inlining 4000 copies of Text's `fromString`) that Carter encountered that originated this ticket. But that doesn't explain the `-fno-case-merge -fno-strictness -fno-cse` part. Carter has asked about this on the xmlhtml bug tracker. The same scenario could apply in reverse, right? In the actual xmlhtml package, `Text.XmlHtml.HTML.Meta` is the first module built and it is built with `-O0` so any interface files that are read while compiling that module will not have unfoldings attached. Then those modules will not have unfoldings during the compilation of any subsequent module either, even though those are built with `-O`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9370#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler