clang error: unknown argument: '-mno-fused-madd' (python package installation failure)

Question

I get the following error when attempting to install psycopg2 via pip on Mavericks 10.9:

clang: error: unknown argument: \'-mno-fused-madd\' [-W         


        

Answer 1

None of the above solutions worked for me. My situation is slightly different. I was trying to install rdiff-backup via homebrew when I got this error message.

I apparently have both Apple's default python (2.7.5 @ /usr/bin/python) and Homebrew's python (2.7.6 @ /usr/local/Cellar/python/2.7.6/bin/python), but the error was coming from Apple's python.

To fix the problem, basically I switched the python binaries.

I did this via sudo:

• cp /usr/bin/python /usr/bin/python_orig
• ln -s /usr/local/Cellar/python/2.7.6/bin/python /usr/bin/python

Then, 'brew install rdiff-backup' succeeded without any errors.

Finally, I did "mv /usr/bin/python_orig /usr/bin/python" to revert everything back.

Answer 2

I used homebrew python package. Works well after re-compilling.