Instead of depending on the Cython module, this recipe now depends on locating the Boost libraries on the system, in combination with the Python development headers and library.
The Python development headers and library are searched for with the following:
find_package(PythonInterp REQUIRED)find_package(PythonLibs ${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR} EXACT REQUIRED)
Note how we first searched for the interpreter and then for the development headers and libraries. Moreover, the search for PythonLibs asks for the exact same major and minor versions for the development headers and libraries as were found for the interpreter. This is necessary for ensuring that consistent versions of interpreter and libraries are used ...