Another attempt to fix CMake Python detection on USE_PYTHON3 status changes
This MR fixes another issue in the USE_PYTHON3
detection logic, since the PYTHON_LIBRARIES
variable inside FindPythonLibsNew
is not cached and is unset on multiple configurations. This currently prevents builds on macOS using Python, since neither MacPorts nor Homebrew explicitly link libboost_python
against the Python libraries.
Edited by Dave Moxey