title: Python numpy/f2py linking libraries
body: <p>I am trying to make a wrapper for one of my fortran programs using f2py. My fortran program uses external libraries and when I try to link them I get an error saying:</p>
  
  <pre><code>gfortran:f77: /var/folders/46/l1mrxgls07s6tpwb6tgpvhpr0000gn/T/tmpPCM7Ne/src.macosx-10.9-intel-2.7/progs-f2pywrappers.f
  Traceback (most recent call last):
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/bin/f2py", line 24, in &lt;module&gt;
      main()
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/f2py/f2py2e.py", line 588, in main
      run_compile()
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/f2py/f2py2e.py", line 574, in run_compile
      setup(ext_modules = [ext])
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/distutils/core.py", line 186, in setup
      return old_setup(**new_attr)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 152, in setup
      dist.run_commands()
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 953, in run_commands
      self.run_command(cmd)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command
      cmd_obj.run()
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/distutils/command/build.py", line 37, in run
      old_build.run(self)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/command/build.py", line 127, in run
      self.run_command(cmd_name)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/cmd.py", line 326, in run_command
      self.distribution.run_command(command)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command
      cmd_obj.run()
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/distutils/command/build_ext.py", line 232, in run
      self.build_extensions()
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/command/build_ext.py", line 448, in build_extensions
      self.build_extension(ext)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/distutils/command/build_ext.py", line 425, in build_extension
      build_temp=self.build_temp,**kws)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/ccompiler.py", line 691, in link_shared_object
      extra_preargs, extra_postargs, build_temp, target_lang)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/distutils/fcompiler/__init__.py", line 643, in link
      libraries)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy/distutils/ccompiler.py", line 571, in gen_lib_options
      runtime_library_dirs, libraries)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/ccompiler.py", line 1086, in gen_lib_options
      lib_file = compiler.find_library_file([lib_dir], lib_name)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/ccompiler.py", line 777, in find_library_file
      raise NotImplementedError
  </code></pre>
  
  <p>So, it looks like I am getting the error from the file <code>ccompiler.py</code> from within the python library.</p>
  
  <p>The error corresponds to the following lines of code in the file:</p>
  
  <pre><code>def find_library_file (self, dirs, lib, debug=0):
          """Search the specified list of directories for a static or shared
          library file 'lib' and return the full path to that file.  If
          'debug' true, look for a debugging version (if that makes sense on
          the current platform).  Return None if 'lib' wasn't found in any of
          the specified directories.
          """
          raise NotImplementedError
  </code></pre>
  
  <p>I am a little confused about what I need to do to solve this problem as I am new to Python. It seems as if this method has not been implemented yet. Do I just need to implement it? How exactly do I implement this? Would I need to rebuild the f2py executable on making this change? If so, how would I do this?</p>
  
  <p>Thanks!</p>