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In http://lists.boost.org/Archives/boost/2003/08/50815.php, the possibility of adding a macro to boost/config.hpp, which basically would result in including .cpp-files from headers, is mentioned. Are there any plans of adding such a macro or is it a bad idea?

I think it's a bad idea, because of the binary size issue above. Is there any particular reason why you'd like Signals to live entirely in headers?

I am introducing boost in a software project and I thought we'd start out by using the header-only libraries, that's all. Well, I also had problems compiling boost on my home computer. If the code size increase really is dramatic I understand your position, otherwise it would be nice to let the users choose. If there is a demand for it, that is. I suppose it would mess up the code a bit too, wouldn't it? Has any other projects done it? Johan