pip3 fails to compile C module(like Pillow, readline etc) on Yosemite

After upgrading OSX to Yosemite, I found pip3 was not working on homebrewed python3. There seems to be many blogs about this problems but I should do some try-and-errors to fix. Here is what I did in order.

 1. install Command Line Tools for 10.10, downloaded from Apple Developer(https://developer.apple.com/downloads/index.action) .

 2. reinstall gcc
brew reinstall gcc

 3. reinstall python3
brew reinstall python3

 4. do pip pip3 install pillow

I am not sure this is the best way, but it worked for me at least. Hope this helps somebody.

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