title: CompileError: command 'arm-linux-gnueabihf-gcc' failed with exit status 1
body: <p>I am getting the error below when executing this code:</p>
  
  <pre><code>import time
  import sys
  import Adafruit_MCP9808.MCP9808 as MCP9808
  import json;
  
  sensor = MCP9808.MCP9808()
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "/home/pi/sensor01.py", line 17, in &lt;module&gt;
      sensor = MCP9808.MCP9808()`enter code here`
    File "/home/pi/Adafruit_MCP9808/MCP9808.py", line 62, in __init__
      import Adafruit_GPIO.I2C as I2C
    File "/home/pi/Adafruit_GPIO/I2C.py", line 25, in &lt;module&gt;
      import smbus
    File "/home/pi/smbus/__init__.py", line 1, in &lt;module&gt;
      from .smbus import ffi
    File "/home/pi/smbus/smbus.py", line 94, in &lt;module&gt;
      """, ext_package='smbus')
    File "/home/pi/smbus/cffi/api.py", line 433, in verify
      lib = self.verifier.load_library()
    File "/home/pi/smbus/cffi/verifier.py", line 113, in load_library
      self._compile_module()
    File "/home/pi/smbus/cffi/verifier.py", line 210, in _compile_module
      outputfilename = ffiplatform.compile(tmpdir, self.get_extension())
    File "/home/pi/smbus/cffi/ffiplatform.py", line 29, in compile
      outputfilename = _build(tmpdir, ext, compiler_verbose)
    File "/home/pi/smbus/cffi/ffiplatform.py", line 62, in _build
      raise VerificationError('%s: %s' % (e.__class__.__name__, e))
  VerificationError: CompileError: command 'arm-linux-gnueabihf-gcc' failed with exit status 1
  </code></pre>