Note that openssl is incompatible with unity builds. This means that
fourdst can only be built as a unity build if libplugin (which is what
brings in openssl) is not build. Generally this will happen when
building only the python bindings which do not depend on openssl or
libplugin
due to a current bug in meson-python duplicate rpaths are registered in the shared object files created by meson-python. The new masos dynamic loader refuses to load shared object files with duplicate rpaths. There is a small patch script which removes any duplicates. This is a temporary but effective fix (https://github.com/mesonbuild/meson-python/issues/813). Further, there was an issue due to mixed use of pure python and C++ code with name conflicts. This has been resolved so that both python and C++ code can be imported just find now.
