PyRoot crashes with ROOT 6.11/02 and Python3

[ksmith]

Another user in another topic has indicated that the PYTHON_EXECUTABLE flag is not sufficient, but that you will additionally need to set the flags PYTHON_INCLUDE_DIR and PYTHON_LIBRARY.

PyROOT cannot open file: "Error in <TNetXNGFile::Open>: [FATAL] Auth failed"

@ksmith So it looks like you’re right. It’s an issue with SIP that can be worked around using a different, non-system python. However, that one flag alone is not enough. I had to do: cmake -Dall=On -DPYTHON_EXECUTABLE=/usr/local/bin/python2 -DPYTHON_INCLUDE_DIR=/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/Headers -DPYTHON_LIBRARY=/usr/local/Cellar/python/2.7.14/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib ../root/ pointing it at the Homebrew vers…