Error installing bcrypt with pip on OS X: can't find ffi.h (libffi is installed)

Question

I\'m getting this error when trying to install bcrypt with pip. I have libffi installed in a couple places (the Xcode OS X SDK, and from homebrew), but I don\'t know how to

Answer 1

I finally got it working with the following with a little help from these posts:

brew install pkg-config libffi
sudo bash
export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments
export PKG_CONFIG_PATH=/usr/local/Cellar/libffi/3.0.13/lib/pkgconfig/
pip install bcrypt