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  1. Mesos
  2. MESOS-1745

Building Python egg on OS X using clang is problematic



    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 0.19.1
    • Fix Version/s: None
    • Component/s: None
    • Labels:
    • Environment:

      Mac OS X 10.8.5
      clang-3.3 installed via brew
      python 2.7.8 install via brew ([GCC 4.2.1 Compatible Apple LLVM 4.2 (clang-425.0.28)])


      Here is what I have observed, correct me if I am wrong.

      To reproduce:

      $ tar zxvf mesos-0.19.1.tar.gz
      $ cd mesos-0.19.1
      $ mkdir build
      $ cd build
      $ CC=clang-3.3 CXX=clang++-3.3 ../configure
      $ make
      $ PYTHONPATH=src/python/dist/mesos-0.19.1-py2.7-macosx-10.8-x86_64.egg python
      Python 2.7.8 (default, Aug 18 2014, 15:46:02) 
      [GCC 4.2.1 Compatible Apple LLVM 4.2 (clang-425.0.28)] on darwin
      Type "help", "copyright", "credits" or "license" for more information.
      >>> import mesos
      Traceback (most recent call last):
        File "<stdin>", line 1, in <module>
        File "build/bdist.macosx-10.8-x86_64/egg/mesos.py", line 26, in <module>
        File "build/bdist.macosx-10.8-x86_64/egg/_mesos.py", line 7, in <module>
        File "build/bdist.macosx-10.8-x86_64/egg/_mesos.py", line 6, in __bootstrap__
      ImportError: dlopen(/Users/jyu/.python-eggs/mesos-0.19.1-py2.7-macosx-10.8-x86_64.egg-tmp/_mesos.so, 2): Symbol not found: __ZN5mesos20MesosSchedulerDriverC1EPNS_9SchedulerERKNS_13FrameworkInfoERKSs
        Referenced from: /Users/jyu/.python-eggs/mesos-0.19.1-py2.7-macosx-10.8-x86_64.egg-tmp/_mesos.so
        Expected in: flat namespace
       in /Users/jyu/.python-eggs/mesos-0.19.1-py2.7-macosx-10.8-x86_64.egg-tmp/_mesos.so

      After digging this problem today, here is what I've found:

      1. build/src/.libs/libmesos_no_3rdparty.a is built using clang+-3.3 with flags -std=c11 -stdlib=libc+. So the mangled MesosSchedulerDriver constructor symbol is like the following in libmesos_no_3rdparty.a

      [tw-mbp-jyu build]$ nm src/.libs/libmesos_no_3rdparty.a | grep MesosSchedulerDriver
      00000000000006d0 T __ZN5mesos20MesosSchedulerDriverC1EPNS_9SchedulerERKNS_13FrameworkInfoERKNSt3__112basic_stringIcNS6_11char_traitsIcEENS6_9allocatorIcEEEE

      2. build/src/python/build/temp.macosx-10.8-x86_64-2.7/native/mesos_scheduler_driver_impl.o is built using clang+-3.3 without -stdlib=libc+

      clang-3.3 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -g -Qunused-arguments -Qunused-arguments -I/tmp/build/mesos-0.19.1/build/../include -I/tmp/build/mesos-0.19.1/build/include -I/tmp/build/mesos-0.19.1/build/src -I/tmp/bui
      ld/mesos-0.19.1/build/src/python/native -I/tmp/build/mesos-0.19.1/build/3rdparty/libprocess/3rdparty/protobuf-2.5.0/src -I/opt/twitter/Cellar/python/2.7.8/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c native/mesos_
      scheduler_driver_impl.cpp -o build/temp.macosx-10.8-x86_64-2.7/native/mesos_scheduler_driver_impl.o

      As a result, it expects a mangled MesosSchedulerDriver constructor symbol like the following:

      [tw-mbp-jyu build]$ nm src/python/build/temp.macosx-10.8-x86_64-2.7/native/mesos_scheduler_driver_impl.o | grep MesosSchedulerDriver
                       U __ZN5mesos20MesosSchedulerDriverC1EPNS_9SchedulerERKNS_13FrameworkInfoERKSs

      3. As a result, the above symbol will remain 'unresolved' in _mesos.so, and subsequently causes issue when we 'import mesos' using the egg.


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              • Assignee:
                jieyu Jie Yu
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