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

For me, the bad flags were explicitly given in the package's Makefile. So I had to edit the makefile to remove the unrecognized flag from the erroring package.