#9189: Linking fails on OSX when -staticlib and -threaded are enabled -------------------------------------+------------------------------------- Reporter: frode | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Keywords: pthread staticlib | Operating System: MacOS X threaded | Type of failure: Compile-time Architecture: x86 | crash Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | -------------------------------------+------------------------------------- I'm trying to build a library with ffi exported functions to be called from ObjectiveC in an Xcode project on OSX. With just -staticlib it works, but when I add -threaded as well I get a linker error saying that it cannot find pthread. This happens even with a trivial program: {{{ Test.hs: module Test where main :: IO () main = putStrLn "Hello" }}} {{{ $ ghc Test.hs -staticlib -threaded [1 of 1] Compiling Test ( Test.hs, Test.o ) Linking liba.a ... error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can't locate file for: -lpthread error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lpthread is not an object file (not allowed in a library) }}} The linker command that fails: {{{ *** Linker: libtool -static -o liba.a Test.o -L/usr/local/lib/ghc-7.8.2/base-4.7.0.0 -L/usr/local/lib/ghc-7.8.2/integer-gmp-0.5.1.0 -L/usr/local/lib/ghc-7.8.2 /ghc-prim-0.3.1.0 -L/usr/local/lib/ghc-7.8.2/rts-1.0 /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0/ghc26454_3.o -lHSbase-4.7.0.0 -lHSinteger-gmp-0.5.1.0 -lHSghc-prim-0.3.1.0 -lHSrts_thr -lCffi -lpthread }}} If I make a script that removes the -lpthread argument, it links ok and the project works with multiple threads calling my ffi-functions simultaneously. It was suggested by Bob on Haskell Cafe that it should not link against libpthread on OSX since it is included in libSystem (like IOS): https://groups.google.com/d/msg/haskell-cafe/GGEkifs_-uY/uzHeV-Z2E2YJ https://github.com/ghc/ghc/blob/master/compiler/main/DriverPipeline.hs#L1869... OSX version 10.9.3 Verbose output: {{{ $ ghc Test.hs -staticlib -threaded -v Glasgow Haskell Compiler, Version 7.8.2, stage 2 booted by GHC version 7.6.3 Using binary package database: /usr/local/lib/ghc-7.8.2/package.conf.d/package.cache Using binary package database: /Users/frode/.ghc/x86_64-darwin-7.8.2/package.conf.d/package.cache hiding package Cabal-1.18.1.3 to avoid conflict with later version Cabal-1.20.0.0 hiding package hoauth2-0.3.6.2 to avoid conflict with later version hoauth2-0.3.7 hiding package hoauth2-0.3.6.1 to avoid conflict with later version hoauth2-0.3.7 wired-in package ghc-prim mapped to ghc- prim-0.3.1.0-948744e1f99cc8bcc7c7d3ba60c7c2d8 wired-in package integer-gmp mapped to integer- gmp-0.5.1.0-dc47f6b546fc171f67a7f7d311684a99 wired-in package base mapped to base-4.7.0.0-a333addb6892f3cc2e6baa5ec782bd04 wired-in package rts mapped to builtin_rts wired-in package template-haskell mapped to template- haskell-2.9.0.0-ed6ecfb467e6936688bb20f968f702e1 wired-in package dph-seq not found. wired-in package dph-par not found. Hsc static flags: hiding package Cabal-1.18.1.3 to avoid conflict with later version Cabal-1.20.0.0 hiding package hoauth2-0.3.6.2 to avoid conflict with later version hoauth2-0.3.7 hiding package hoauth2-0.3.6.1 to avoid conflict with later version hoauth2-0.3.7 wired-in package ghc-prim mapped to ghc- prim-0.3.1.0-948744e1f99cc8bcc7c7d3ba60c7c2d8 wired-in package integer-gmp mapped to integer- gmp-0.5.1.0-dc47f6b546fc171f67a7f7d311684a99 wired-in package base mapped to base-4.7.0.0-a333addb6892f3cc2e6baa5ec782bd04 wired-in package rts mapped to builtin_rts wired-in package template-haskell mapped to template- haskell-2.9.0.0-ed6ecfb467e6936688bb20f968f702e1 wired-in package dph-seq not found. wired-in package dph-par not found. *** Chasing dependencies: Chasing modules from: *Test.hs Stable obj: [Test] Stable BCO: [] Ready for upsweep [NONREC ModSummary { ms_hs_date = 2014-06-10 10:02:41 UTC ms_mod = main:Test, ms_textual_imps = [import (implicit) Prelude] ms_srcimps = [] }] *** Deleting temp files: Deleting: compile: input file Test.hs Created temporary directory: /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0 *** Checking old interface for main:Test: [1 of 1] Skipping Test ( Test.hs, Test.o ) Upsweep completely successful. *** Deleting temp files: Deleting: /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0/ghc26454_1.s Warning: deleting non-existent /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0/ghc26454_1.s link: linkables are ... LinkableM (2014-06-10 10:02:55 UTC) main:Test [DotO Test.o] Linking liba.a ... *** C Compiler: /usr/bin/gcc -m64 -fno-stack-protector -DTABLES_NEXT_TO_CODE -c /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0/ghc26454_2.c -o /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0/ghc26454_3.o -I/usr/local/lib/ghc-7.8.2/include *** Linker: libtool -static -o liba.a Test.o -L/usr/local/lib/ghc-7.8.2/base-4.7.0.0 -L/usr/local/lib/ghc-7.8.2/integer-gmp-0.5.1.0 -L/usr/local/lib/ghc-7.8.2 /ghc-prim-0.3.1.0 -L/usr/local/lib/ghc-7.8.2/rts-1.0 /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0/ghc26454_3.o -lHSbase-4.7.0.0 -lHSinteger-gmp-0.5.1.0 -lHSghc-prim-0.3.1.0 -lHSrts_thr -lCffi -lpthread error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can't locate file for: -lpthread error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: -lpthread is not an object file (not allowed in a library) *** Deleting temp files: Deleting: /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0/ghc26454_3.o /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0/ghc26454_2.c *** Deleting temp dirs: Deleting: /var/folders/jc/3pqglx_x3z9dk3gnxgh56tv80000gp/T/ghc26454_0 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9189 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler