Hello, > In one of the messages in the earlier thread, I found a link to > https://isocpp.org/wiki/faq/mixing-c-and-cpp May be this will interest you: https://github.com/BSeppke/vigra_c/ Here is a link for a pdf which is a presentation about using the above from Common Lisp...: https://duckduckgo.com/l/?kh=-1&uddg=https%3A%2F%2Fkogs-www.informatik.uni-hamburg.de%2F~seppke%2Fcontent%2Fresearch%2Fpublications%2F2010_seppkeetal_els.pdf There used to be a similar project/approach by the OpenCV folks as well, I think, not sure... Cheers, David