Re: [Haskell-cafe] Problems using ghc 7.8.2 with options -staticlib and -threaded on osx

After patching your Xcode project file to use $(PROJECT_DIR) instead of /Users/frode/dev/haskell/digipostarkiv I was able to build this. I changed the "libtool command" in my lib/ghc-7.8.2/settings to a shim that removes -lpthread and then calls /usr/bin/libtool. Not pretty but it worked, I'm sure there's a better workaround, but I think the real solution should be to simply special-case OSDarwin in the same way as OSiOS in GHC. On Mon, Jun 9, 2014 at 12:33 PM, Bob Ippolito wrote:

This seems like a bug, you shouldn't need to link to libpthread at all on Mac. /usr/lib/libpthread.dylib is just a symlink to libSystem… Not sure how to get around the issue without rebuilding GHC, it looks like iOS is special cased in the compiler (OSiOS) but not Mac OS X (OSDarwin) [1].

[1] https://github.com/ghc/ghc/blob/master/compiler/main/DriverPipeline.hs#L1869...

On Mon, Jun 9, 2014 at 11:36 AM, Frode Nerbråten wrote:

...

Hi,

I'm having trouble building my Haskell library with GHC 7.8.2 and Cabal 1.20.0.2 on OSX 10.9.3 with both -staticlib and -threaded enabled.

The library I'm building exports several functions using FFI to be called from ObjectiveC in an Xcode project. This works fine with just -staticlib enabled, but now I realize I need to call into my Haskell library from multiple OS-threads simultaneously. But when I add -threaded to ghc-options I get an error when linking:

error: libtool: can't locate file for: -lpthread error: libtool: file: -lpthread is not an object file (not allowed in a library)

The linker command that fails looks like this (... replaces a bunch of -l and -L options):

libtool -static -o liba.a dist/build/HsCocoa.o ... -lCffi -lpthread

In /usr/lib I have a libpthread.dylib that links to libSystem.dylib, but no libpthread.a. I was under the impression that libpthread was included with the system install.

Is this supposed to work or am I misunderstanding something basic? :) Any help would be greatly appreciated!

The project source is available on github: https://github.com/froden/digipostarkiv (I asked the same question on stackoverflow: http://stackoverflow.com/q/24096257/777411)

Best regards, Frode Nerbråten _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe