title: Anaconda conda install pymc: Compilation failed on import
body: <p>My goal is to install PyMC3 with Python3 on Mac OS 10.10.5. My following approach failed:</p>
  
  <ol>
  <li>I checked Theano website and saw that Python 3.6 was not yet supported.</li>
  <li>So I went for Python 3.5, using <a href="https://repo.continuum.io/archive/Anaconda3-4.2.0-MacOSX-x86_64.pkg" rel="nofollow noreferrer">https://repo.continuum.io/archive/Anaconda3-4.2.0-MacOSX-x86_64.pkg</a> (following docs.continuum.io/anaconda/faq.html#anaconda-faq-35)</li>
  <li>In the Jupiter QtConsole I ran <code>!conda install -y -c conda-forge pymc3</code> (modifying the recommended command at pymc-devs.github.io/pymc3/)</li>
  <li>The install completed sucessfully</li>
  <li><code>import pymc3</code> failed with " 'stdio.h' file not found"</li>
  <li>I ran <code>!xcode-select --install</code> (as suggested by stackoverflow.com/a/40301452)</li>
  <li><code>import pymc3</code> failed again, now with the following error message:</li>
  </ol>
  
  <p>Exception: Compilation failed (return status=1): ld: symbol dyld_stub_binding_helper not found, normally in crt1.o/dylib1.o/bundle1.o for architecture x86_64. clang: error: linker command failed with exit code 1 (use -v to see invocation).</p>
  
  <p>Here is a longer tail of the error message:</p>
  
  <pre><code>  01066   #if defined(NPY_PY3K)
    01067   static struct PyModuleDef moduledef = {
    01068           PyModuleDef_HEAD_INIT,
    01069           "lazylinker_ext",
    01070           NULL,
    01071           -1,
    01072           lazylinker_ext_methods,
    01073           NULL,
    01074           NULL,
    01075           NULL,
    01076           NULL
    01077   };
    01078   #endif
    01079   #if defined(NPY_PY3K)
    01080   #define RETVAL m
    01081   PyMODINIT_FUNC
    01082   PyInit_lazylinker_ext(void) {
    01083   #else
    01084   #define RETVAL
    01085   PyMODINIT_FUNC
    01086   initlazylinker_ext(void) 
    01087   {
    01088   #endif
    01089       PyObject* m;
    01090   
    01091       lazylinker_ext_CLazyLinkerType.tp_new = PyType_GenericNew;
    01092       if (PyType_Ready(&amp;lazylinker_ext_CLazyLinkerType) &lt; 0)
    01093           return RETVAL;
    01094   #if defined(NPY_PY3K)
    01095       m = PyModule_Create(&amp;moduledef);
    01096   #else
    01097       m = Py_InitModule3("lazylinker_ext", lazylinker_ext_methods,
    01098                          "Example module that creates an extension type.");
    01099   #endif
    01100       Py_INCREF(&amp;lazylinker_ext_CLazyLinkerType);
    01101       PyModule_AddObject(m, "CLazyLinker", (PyObject *)&amp;lazylinker_ext_CLazyLinkerType);
    01102   
    01103       return RETVAL;
    01104   }
    01105   
    Problem occurred during compilation with the command line below:
    /usr/bin/clang++ -dynamiclib -g -DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -m64 -fPIC -undefined dynamic_lookup -I/Users/toy3/anaconda/lib/python3.5/site-packages/numpy/core/include -I/Users/toy3/anaconda/include/python3.5m -I/Users/toy3/anaconda/lib/python3.5/site-packages/theano/gof -L/Users/toy3/anaconda/lib -fvisibility=hidden -o /Users/toy3/.theano/compiledir_Darwin-14.5.0-x86_64-i386-64bit-i386-3.5.2-64/lazylinker_ext/lazylinker_ext.so /Users/toy3/.theano/compiledir_Darwin-14.5.0-x86_64-i386-64bit-i386-3.5.2-64/lazylinker_ext/mod.cpp
    ---------------------------------------------------------------------------
    ImportError                               Traceback (most recent call last)
    /Users/toy3/anaconda/lib/python3.5/site-packages/theano/gof/lazylinker_c.py in &lt;module&gt;()
         74         if version != getattr(lazylinker_ext, '_version', None):
    ---&gt; 75             raise ImportError()
         76 except ImportError:
  
    ImportError: 
  
    During handling of the above exception, another exception occurred:
  
    ImportError                               Traceback (most recent call last)
    /Users/toy3/anaconda/lib/python3.5/site-packages/theano/gof/lazylinker_c.py in &lt;module&gt;()
         91             if version != getattr(lazylinker_ext, '_version', None):
    ---&gt; 92                 raise ImportError()
         93         except ImportError:
  
    ImportError: 
  
    During handling of the above exception, another exception occurred:
  
    Exception                                 Traceback (most recent call last)
    &lt;ipython-input-4-37bf2a3357ff&gt; in &lt;module&gt;()
    ----&gt; 1 import pymc3
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/pymc3/__init__.py in &lt;module&gt;()
          2 
          3 from .blocking import *
    ----&gt; 4 from .distributions import *
          5 from .math import logsumexp, logit, invlogit
          6 from .model import *
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/pymc3/distributions/__init__.py in &lt;module&gt;()
    ----&gt; 1 from . import timeseries
          2 from . import transforms
          3 
          4 from .continuous import Uniform
          5 from .continuous import Flat
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/pymc3/distributions/timeseries.py in &lt;module&gt;()
    ----&gt; 1 import theano.tensor as tt
          2 from theano import scan
          3 
          4 from .continuous import Normal, Flat
          5 from .distribution import Continuous
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/theano/__init__.py in &lt;module&gt;()
         64     object2, utils)
         65 
    ---&gt; 66 from theano.compile import (
         67     SymbolicInput, In,
         68     SymbolicOutput, Out,
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/theano/compile/__init__.py in &lt;module&gt;()
          8         SpecifyShape, specify_shape, register_specify_shape_c_code)
          9 
    ---&gt; 10 from theano.compile.function_module import *
         11 
         12 from theano.compile.mode import *
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/theano/compile/function_module.py in &lt;module&gt;()
         19 from theano.compat import izip
         20 from theano.gof import graph
    ---&gt; 21 import theano.compile.mode
         22 import theano.compile.profiling
         23 from theano.compile.io import (
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/theano/compile/mode.py in &lt;module&gt;()
          8 import theano
          9 from theano import gof
    ---&gt; 10 import theano.gof.vm
         11 from theano.configparser import config
         12 from theano.compile.ops import _output_guard
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/theano/gof/vm.py in &lt;module&gt;()
        660     if not theano.config.cxx:
        661         raise theano.gof.cmodule.MissingGXX('lazylinker will not be imported if theano.config.cxx is not set.')
    --&gt; 662     from . import lazylinker_c
        663 
        664     class CVM(lazylinker_c.CLazyLinker, VM):
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/theano/gof/lazylinker_c.py in &lt;module&gt;()
        125             args = cmodule.GCC_compiler.compile_args()
        126             cmodule.GCC_compiler.compile_str(dirname, code, location=loc,
    --&gt; 127                                              preargs=args)
        128             # Save version into the __init__.py file.
        129             init_py = os.path.join(loc, '__init__.py')
  
    /Users/toy3/anaconda/lib/python3.5/site-packages/theano/gof/cmodule.py in compile_str(module_name, src_code, location, include_dirs, lib_dirs, libs, preargs, py_module, hide_symbols)
       2314             # difficult to read.
       2315             raise Exception('Compilation failed (return status=%s): %s' %
    -&gt; 2316                             (status, compile_stderr.replace('\n', '. ')))
       2317         elif config.cmodule.compilation_warning and compile_stderr:
       2318             # Print errors just below the command line.
  
    Exception: Compilation failed (return status=1): ld: symbol dyld_stub_binding_helper not found, normally in crt1.o/dylib1.o/bundle1.o for architecture x86_64. clang: error: linker command failed with exit code 1 (use -v to see invocation). 
  </code></pre>
  
  <p>How can I proceed with the installation of PyMC3?</p>