I'm seeing an incredibly strange issue with pip on a fresh install of OS X 10.8
For a variety of packages that require c compilation (gevent, zeromq, etc.) it seems that pip is adding extra spaces to the command, causing it to fail:
building 'zmq.libzmq' extension
/ A p p l i c a t i o n s / X c o d e . a p p / C o n t e n t s / D e v e l o p e r / T o o l c h a i n s / X c o d e D e f a u l t . x c t o o l c h a i n / u s r / b i n / c l a n g - f n o - s t r i c t - a l i a s i n g - f n o - c o m m o n - d y n a m i c - I / u s r / l o c a l / i n c l u d e - I / u s r / l o c a l / o p t / s q l i t e / i n c l u d e - i s y s r o o t / A p p l i c a t i o n s / X c o d e . a p p / C o n t e n t s / D e v e l o p e r / P l a t f o r m s / M a c O S X . p l a t f o r m / D e v e l o p e r / S D K s / M a c O S X 1 0 . 8 . s d k - I / A p p l i c a t i o n s / X c o d e . a p p / C o n t e n t s / D e v e l o p e r / P l a t f o r m s / M a c O S X . p l a t f o r m / D e v e l o p e r / S D K s / M a c O S X 1 0 . 8 . s d k / S y s t e m / L i b r a r y / F r a m e w o r k s / T k . f r a m e w o r k / V e r s i o n s / 8 . 5 / H e a d e r s - D N D E B U G - g - f w r a p v - O 3 - W a l l - W s t r i c t - p r o t o t y p e s -Ibundled/zeromq/include -I/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c buildutils/initlibzmq.c -o build/temp.macosx-10.8-x86_64-2.7/buildutils/initlibzmq.o
unable to execute /: Permission denied
error: command '/' failed with exit status 1
pip was installed via brew install python.
Any idea what causes this or how to fix it?
Very strange error to very novice problem: I forgot to go into Xcode and explicitly download the Command Line Tools (under Preferences > Downloads). Everything is happy now.