#14444: Linker limit on OS X Sierra breaks builds for big projects -------------------------------------+------------------------------------- Reporter: dredozubov | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 (Linking) | Keywords: | Operating System: MacOS X Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- I'm opening a fresh ticket as @bgamari suggested in #12479. There are few more related closed tickets as well: #12198 and #12588. The issue occurs on projects with a lot of dependencies. There are reports of that happening across various projects: [https://github.com/NixOS/nixpkgs/issues/22810] [https://github.com/commercialhaskell/stack/issues/2577] I'm still able to reproduce it with 8.2.1 and git HEAD with a work project: {{{ ghc: panic! (the 'impossible' happened) (GHC version 8.2.1 for x86_64-apple-darwin): Loading temp shared object failed: dlopen(/var/folders/f8/2_rc4tgd1gj9vbgv7q9gbk4c0000gn/T/ghc94377_0/libghc_325.dylib, 5): no suitable image found. Did find: /var/folders/f8/2_rc4tgd1gj9vbgv7q9gbk4c0000gn/T/ghc94377_0/libghc_325.dylib: malformed mach-o: load commands size (34592) > 32768 Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} I can't share the sources, but this is a command(generated by stack) that results in this error: `/Users/dr/.stack/setup-exe-cache/x86_64-osx/Cabal- simple_mPHDZzAJ_2.0.0.2_ghc-8.2.1 --builddir=.stack- work/dist/x86_64-osx/Cabal-2.0.0.2 build lib:projectname exe:projectname --ghc-options " -ddump-hi -ddump-to-file -fdiagnostics-color=always"` We're having a chat about this issue with @bgamari and I'll post some of his input: {{{ bgamari: dredozubov, unfortunately this is pretty much a limitation of OS X's linker bgamari: there's no great solution other than petitioning Apple to lift their arbitrary size limit bgamari: I've been asking people to open tickets with Apple bgamari: As they are really the only ones that can really fix this issue dredozubov: bgamari, do you know if someone did this already? bgamari: dredozubov, No one has said they have dredozubov: the other issue with it, I don't how to do a repro case dredozubov: I can reproduce it on a project with a closed sources and that's it bgamari: essentially you just need to build a project with enough dependencies bgamari: the problem is that Apple's linker sets an artificial cap on the number of shared libraries that an object file can load }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14444 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler