I had my eye on a new tool, snakemake, that a friend pointed out to me. I decided it was the moment to switch to Python 3.
I installed Python 3 using MacPorts:
<code>sudo port install python34 sudo port select --set python python34 </code>
That seemed pretty easy. The trouble came when I decided that it was also time to start using swig. In short, I was thinking about running some simulations that were conceptually simple but computationally expensive, and writing the heavy lifting sections in C sounded like just the ticket.
I tried to run the example swig files using the library linking commands for OSX. I got an error
ld: library not found for -lintl. When I switched back to
port, the compilation and library linking worked just fine.
I found the answer in an out-of-the-way post:
<code> swig -python foo.i gcc -c foo.c gcc -c -I/opt/local/Library/Frameworks/Python.framework/Versions/3.4/include/python3.4m foo_wrap.c ld -bundle -flat_namespace -undefined suppress -o _foo.so foo.o foo_wrap.o </code>