title: Numpy install Broken toolchain: cannot link a simple C program
body: <p><strong>System:</strong><p></p>
  
  <pre><code>Windows 10
  Python 3.7
  Numpy 1.15.1
  VS 2017
  </code></pre>
  
  <p>I don't believe this is a duplicate as the following proposed resolutions have failed:<p></p>
  
  <ul>
  <li>(for homebrew - N/A)
  <a href="https://stackoverflow.com/questions/27751996/numpy-install-runtimeerror-broken-toolchain-cannot-link-a-simple-c-program">Numpy Install RuntimeError: Broken toolchain: cannot link a simple C program</a></li>
  <li>(Unanswered) <a href="https://stackoverflow.com/questions/31911120/pycharm-pip-installs-fail-runtimeerror-broken-toolchain-cannot-link-a-simple">PyCharm pip installs fail, RuntimeError: Broken toolchain: cannot link a simple C program</a></li>
  <li>(Windows no sudo)
  <a href="https://stackoverflow.com/questions/22388519/problems-with-pip-install-numpy-runtimeerror-broken-toolchain-cannot-link-a">Problems with pip install numpy - RuntimeError: Broken toolchain: cannot link a simple C program</a></li>
  </ul>
  
  <p><strong>Additional Note:</strong>
  I don't have network access so I'm using 'basket'
  my install line is as follows:</p>
  
  <pre><code>pip install --no-index -f .basked numpy
  </code></pre>
  
  <p>I've run this in the <code>command prompt</code>, <code>power shell</code>, and <code>VS command prompt</code></p>
  
  <p><strong>Final Error in Traceback:</strong></p>
  
  <pre><code> 377, in generate_sources
          source = func(extension, build_dir)
        File "numpy\core\setup.py", line 666, in get_mathlib_info
          raise RuntimeError("Broken toolchain: cannot link a simple C program")
      RuntimeError: Broken toolchain: cannot link a simple C program
  </code></pre>