The correct way to build nupic.core

# The PYTHONPATH must be point to the virtual environment in order to make cmake find the pycapnp in its python library ??
# That's probably the cause of previous failures.

# Create path variable to the folder you git clone the nupic.core
NUPIC_CORE=$PWD

# Build the directory
mkdir build/script
# enter the directory
cd build/script
# generate build file
PYTHONPATH=$PYTHONPATH:/Users/pohsuanhuang/miniconda/envs/nupic/lib/python2.7/site-packages
cmake $NUPIC_CORE -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=../release -DPY_EXTENSIONS_DIR=$NUPIC_CORE/bindings/py/nupic/bindings -DCMAKE_CXX_COMPILER=/usr/bin/clang++

# While still in ./script
PYTHONPATH=$PYTHONPATH:/Users/pohsuanhuang/miniconda/envs/nupic/lib/python2.7/site-packages CXX='/usr/bin/clang++' make -j3

# While still in ./script
CXX='/usr/bin/clang++' make install

# Run the tests
cd $NUPIC_CORE/build/release/bin
./cpp_region_test
./unit_tests


# Install nupic.bindings Python library. 'ARCHFLAGS="-arch x86_64' is ONLY for OS X

cd $NUPIC_CORE
export ARCHFLAGS="-arch x86_64
python setup.py develop

# then the following should work smoothly.
# run the tests...