Environment: Linux Mint 17 Cinnamon.
This error is displayed:
error: command \'x86_64-linux-gnu-gcc\' failed with exit status 1
w
This can be a problem in the pip. To solve, try:
sudo apt-get remove python-pip
To install pip, securely download get-pip.py.
https://bootstrap.pypa.io/get-pip.py sudo python get-pip.py
https://bootstrap.pypa.io/get-pip.py
sudo python get-pip.py